記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

This paper illustrates the sensorless speed control of Synchronous reluctance motor (SynRM) using the Moving Horizon Estimation (MHE) based Kalman Filter (KF) method under sensor and process noise. The optimal estimation of the rotor speed and position is attained by minimizing the error between measured and estimated stator currents as a modified cost function, within a finite time horizon. The modified cost function includes the updation of kalman gain constant to enrich the estimation of speed variable even under noisy conditions. The proposed MHE based sensorless method is validated by performing speed control using cascaded PI based speed and current controllers for SynRM, in extensive fixed-step MATLAB simulation environment

DOI： 10.23919/ICEMS50442.2020.9290951

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. The proportional-integral (PI)-based control for the motor drive system is commonly used in industrial applications. However, motor drive system development and prototyping are tedious tasks especially considering a field programmable gate array (FPGA)-based real-time system implementation. In addition, the time-synchronization of the feedback control loop is another vital aspect concerning sampling time for the discrete-time controller. This paper presents an FPGA-based design and development of a permanent magnet synchronous motor (PMSM) drive system considering the impact of time-synchronization corresponding to the sampling time criteria for a feedback control loop. Furthermore, the repercussion of time-synchronization is examined for the transient conditions due to a step change in load as well as motor speed. The field-oriented control (FOC) of the PMSM drive system is designed and implemented for the system authentication using a digital model integration approach provided by the Xilinx system generator (XSG) and VIVADO platform. Moreover, harmonic distortion in the motor current is considered for an in-depth analysis of the system performance corresponding to sampling time as well as switching frequencies.

DOI： 10.3390/electronics9111906

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2020 by the authors. Finite set-model predictive control (FS-MPC) is used for power converters and drives having unique advantages as compared to the conventional control strategies. However, the computational burden of the FS-MPC is a primary concern for real-time implementation. Field programmable gate array (FPGA) is an alternative and exciting solution for real-time implementation because of the parallel processing capability, as well as, discrete nature of the hardware platform. Nevertheless, FPGA is capable of handling the computational requirements for the FS-MPC implementation, however, the system development involves multiple steps that lead to the time-consuming debugging process. Moreover, specific hardware coding skillmakes itmore complex corresponding to an increase in system complexity that leads to a tedious task for system development. This paper presents an FPGA-based experimental implementation of FS-MPC using the system modeling approach. Furthermore, a comparative analysis of FS-MPC in stationary αβ and rotating dq frame is considered for simulation as well as experimental result. The FS-MPC for a three-phase voltage source inverter (VSI) system is developed in a realistic digital simulator integrated with MATLAB-Simulink. The simulated controller model is further used for experimental system implementation and validation using Xilinx FPGA: Zedboard Zynq Evaluation and Development Kit. The digital simulator termed as Xilinx system generator (XSG) provided by Xilinx is used for modeling-based FPGA design.

DOI： 10.3390/en13010260

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2019 IEEE. This paper proposes an encoderless servo drive system including high torque density servomotor capable of handling large load, and high response and high accuracy saliency based sensorless drive technology. As an encoderless servomotor, the spoke type Interior Permanent Magnet Synchronous Motor (IPMSM) that is used for a general purpose servomotor is selected, and its magnetic field analysis is shown. Based on the analysis result of the motor, position error compensation methods for accurate driving the motor are proposed. Experimental results show the proposed servo drive system performance and issues that need to be improved in the future products.

DOI： 10.1109/IECON.2019.8927409

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2019 IEEE. The finite set model predictive control (FS-MPC) exploits the advantages such as high dynamic response and flexibility. However, the spread spectrum due to variable switching frequency of FS-MPC is the main drawback associated with it. In this paper, a predictive control strategy with fixed switching frequency is proposed. A discrete adaptive based hysteresis current control (DAHCC) is combined with the basic FS-MPC as current controller to achieve constant switching frequency. The proposed current control strategy is implemented for voltage source inverter fed permanent magnet synchronous motor (PMSM). The system is implemented using the MATLAB/Simulink and system generator platform provided by Xilinx.

DOI： 10.1109/ICEMS.2019.8922261

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2018 IEEE. Finite state Model predictive control (FS-MPC) is one of the classifications of MPC that has been employed for switching control of voltage source inverters (VSIs). FS-MPC is based on the fundamental concept of optimized switching state selection corresponding to the minimum cost function /error function using finite states model of the power electronics converter. In this paper, modified FS-MPC based on the novel mathematical cost function is presented for reduction of switching frequency. An additional constraint of change in current error with conventional absolute error is formulated to present novel cost function. In addition, the cost function based on squared error is also formulated for in-depth analysis. The proposed novel cost function based FS-MPC is compared with previously presented FS-MPC based on the cost function with change in voltage vector constraint. FS-MPC is implemented in MATLAB-Simulink for a three-phase VSI and simulation results are obtained for performance analysis and validation of the controller.

DOI： 10.1109/PEDES.2018.8707540

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2019 The Korean Institute of Power Electronics (KIPE). Power converters are used for grid integration of renewable sources that can achieve certain objectives through system control. Finite state - model predictive control (FS-MPC) is one of the techniques used for the grid integration of voltage source inverter (VSI) and possessing distinctive features such as fast dynamic performance and ability to incorporate constraints inherently. However, system development is one of the concern for FS-MPC due to computational delay problem. Field programmable gate array (FPGA) based system development is a way to tackle the mentioned problem because of its parallel processing nature. In this paper, FS-MPC is presented for three-phase grid-connected VSI system using modeling-based digital system design approach that is advantageous for analysis, easy debugging and FPGA-based system development. The integrated platform of MATLAB-Simulink and system generator is used for modeling and Hardware-in-the-Loop (HIL) simulation to validate the system.

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2019 The Korean Institute of Power Electronics (KIPE). A hardware-in-the-loop (HIL)simulation approach providing a platform to develop a controller prototype as well as emulators for motor system and power electronic converters that allows rapid testing and proactive system evaluation with an advantage of low cost, safety, and flexibility to operate in extreme boundary conditions. However, the variety of HIL combinations can be adopted to realize a system model that is neither too simple nor to be highly complex to match the realistic behavior considering transient condition and steady state condition. In this paper, a discrete time simulation model of the permanent magnet synchronous motor (PMSM)drive system is presented for FPGA HIL simulation. Moreover, different combination of HIL approach is adopted for detailed performance analysis considering transient behavior of the system. The entire system is implemented using the MATLAB/Simulink and system generator platform provided by Xilinx for HIL simulation using FPGA.

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© School of Engineering, Taylor’s University. This paper studies a magnetic geared dual-stator machine with a dual-iron ring structure, which is proposed for low-speed power generators. To improve the torque performance, a parameterised design approach using 2-D finite element method (2D-FEM) is used to calculate the transmission torque and analyse the relationship between the geometrical parameters and maximum torque. The geometrical design parameters include the thickness of the pole pieces, thickness, and width of the magnets. The operating principle of the magnetically geared generator is based on three permanent magnet rotors that rotate independently. The magnetic geared generator’s operating principle is discussed and presented. In addition, the transmission torque characteristics of the parameterised generator are analysed and reported. The results demonstrate that the parameterised design analysis can increase the torque density of the magnetically geared PM machine.

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

<p>Many transport units for large production devices now incorporate large-sized gantry type linear motor sliders comprising two parallel linear sliders linked by a joint table. This type of linear motor slider develops a unique mechanical distortion, generating a repulsive force between the two axes that can raise the motor output forces higher than their rated limit. A previous study proposed a method to suppress the repulsive force. However, as feedback gains are set high, force references oscillate and the control system becomes unstable. In past study, yawing vibration suppression methods have been proposed. But, we consider that this vibration is not yawing vibration because the force references include same phase vibration with high gains. Therefore, the modal analysis is performed to analyze this vibration. As a result, it was found that the pitching vibration of the slider was greatly affected. This paper considers this vibration phenomenon, and suppression of the vibration by control method which is similar to impedance control is presented. Hence, it is shown that considering multi-degree of freedom vibration which means yawing vibration and pitching vibration included is important in order to control the large-sized gantry type linear motor sliders.</p>

DOI： 10.20965/jrm.2019.p0240

CiNii Article

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2018 IEEJ Industry Application Society. This paper presents an application of a fictitious reference iterative tuning method (FRIT), which is data-driven controller design method, to various machines. FRIT can be used to design the controller using only the initial experimental data, without the state equations of the model and the model parameters. The proposed controller is based on a PID control and included multi control loop. The control objects are a two-mass resonance system, a ball screw positioning system, a switched reluctance motor, and a switched reluctance generator. Finally, we confirm the effectiveness of the proposed method through computer simulations and experimental results.

DOI： 10.23919/IPEC.2018.8507782

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2018 IEEJ Industry Application Society. Finite state-model predictive control (FS-MPC) has gained considerable interest for implementing the current control of power converters. The increase in complexity level of FS-MPC is a concern for design and prototyping of the controller. Xilinx system generator (XSG) provides model-based design platform to realize rapid design and prototyping of digital controller through analysis of intermediate outputs. The discrete nature of FS-MPC readily suits the XSG environment for controller implementation. This paper proposes the design and development of FS-MPC controlled three phase voltage source inverter (VSI) in integrated platform of XSG and MATLAB-Simulink. The system performance is analyzed through simulation results.

DOI： 10.23919/IPEC.2018.8507935

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This paper deals with a design and experimental verification of 400-W class light-emitting diode (LED) driver with cooperative control method for two-parallel connected DC/DC converters. In the cooperative control method, one DC/DC converter is selected to supply the output current for the LED, based on the reference value of the LED current. Thus, the proposed cooperative-control strategy achieves wide dimming range operation. The discontinuous current conduction mode (DCM) operation improves the total harmonic distortion (THD) value on the AC side of the LED driver. The standard of Electrical Applications and Materials Safety Act in Japan has defined the flicker frequency and minimum optical output. The smoothing capacitors are designed by considering the power flow and LED current ripple for satisfying the standard. A prototype LED driver is constructed and tested. Experimental results demonstrate that a wide dimming operation range from 1 to 100% is achieved with a THD value less than 10% on the AC side, by the proposed control strategy. The authors compare the power conversion efficiency between Si-and SiC-metal-oxide-semiconductor field-effect transistors (MOSFETs) based LED driver. The maximum power conversion efficiency by using SiC-MOSFETs based LED driver is 91.4%. Finally, the variable switching frequency method is proposed for improving the power conversion efficiency for a low LED current region.

DOI： 10.3390/en11092237

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2018 IEEE. Switching signals are generated using control techniques for operation of voltage source inverter (VSI). Each control having distinctive pros and cons that requires a trade-off to achieve desired performance of VSI system. Finite control set model predictive control (FCS-MPC) has gained considerable interest among the researchers due to advantages such as intuitive execution of algorithm and inclusion of constraints. This paper presents a comparative analysis of FCS-MPC and classical control techniques: hysteresis current control (HCC) and linear pulse width modulation (PWM) for three phase VSI system. The controllers are developed in MATLAB/Simulink environment to investigate the system performance corresponding to change in controller parameters.

DOI： 10.1109/EPECS.2018.8443541

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2018 IEEE. Rapid controller design and prototyping is vital for the development of power electronics controller. Model-based design is an approach for rapid design and prototyping of controller through recursive analysis of intermediate outputs. This paper presents the model based design approach and it is adopted to implement Finite State Model Predictive Control (FS-MPC) for three phase voltage source inverter (VSI) system. Discrete state space model of the inverter is used for the prediction of states in each sampling time for the implementation of controller. The model-based FS-MPC is developed for three phase VSI system in MATLAB-Simulink and performance is analyzed through simulation results.

DOI： 10.1109/ICIEA.2018.8397837

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2018 Gerontological Society of America. All rights reserved. The conversion and control for the utilization of power generated from energy sources can be performed using a power electronic converter system. The voltage source inverter (VSI) is one of the commonly used converter topologies, being controlled by a switching control algorithm for power conversion. Finite set-model predictive control (FS-MPC) is a modern switching control algorithm and has received significant attention due to its predictive nature. In this paper, the implementation of FS-MPC is presented for the load-side current control of a three-phase VSI system using an integrated platform of MATLAB/Simulink and Xilinx system generator (XSG). The XSG provides the functionality of digital design and intuitive implementation of field-programmable gate array (FPGA) controlled systems. The additional functionality of hardware-in-the-loop (HIL) co-simulation using FPGA is used for the testing and validation of controller performance. The controller performance is validated through three platforms: MATLAB/Simulink, XSG and HIL co-simulation using ZedBoard Zynq evaluation and development FPGA kit.

DOI： 10.3390/en11040909

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2018 Wiley Periodicals, Inc. At present, many industrial carrier devices utilize linear motor sliders. However, a heavier load requires a linear motor (which is an example of a direct drive device) to get higher power, compared with a rotary motor with a ball screw slider (which is an example of an indirect drive device). In order to obtain higher power at a lower cost, a linear slider with multiple motors can be utilized, for example, a gantry type linear motor slider. Moving the gantry type slider requires two linear motors that are set up in parallel to enable synchronization control. Some conventional synchronization control methods have been proposed for the parallel twin linear slider; however, a large-scaled gantry type linear motor slider has two unique problems: mechanical distortion caused by the limitations of installation environment and coupling caused by joints with low stiffness. This paper proposes a control model to solve these problems, and an identification method of each parameter. Furthermore, the effectiveness of the control model is verified by comparison with simulation results and experimental results.

DOI： 10.1002/eej.23074

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2017 by the authors. Licensee MDPI, Basel, Switzerland. This paper presents the design, fabrication and experimental power analysis of a novel double-stator magnetic geared permanent magnet (DSMGPM) machine which comprises of a doublestator permanent-magnet (PM) machine integrated a with triple rotor magnetic gear. The proposed machine can upscale the low-speed rotating magnetic field of the prime PMs on the prime rotor by using the modulation effect produced from the pole-pieces to high-speed rotating magnetic field from the field PMs. The low-speed prime rotor can also increase the speed of the field PM rotor and excite the coil windings to induce an electromotive force (EMF) resulting in electrical power. Thus, the machine is proposed for power generation in low-speed renewable energy applications such as wind turbines and tidal power generators. The proposed machine topology is presented and discussed while the performance power characteristics are evaluated experimentally. A prototype is fabricated and the measured results are in good agreement with the calculated results, therefore validating the proposed magnetic geared machine design.

DOI： 10.3390/en10122048

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2017 IEEE. A large-sized gantry-type linear motor slider has a unique problem, that being mechanical distortion, creating a repulsive force between each axis that may raise the output force over the rated limit for the motor. A method to suppress the repulsive force is proposed, and its effectiveness confirmed. However, when the feedback gain is set high, this linear motor slider generates vibrations as the feedback gain is near a resonance frequency. Conventionally, a disturbance observer is well known to suppress vibration. This study describes the implementation of the disturbance observer to the slider and reestablishes the effectiveness of this method of suppression.

DOI： 10.1109/ICMA.2017.8015987

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2017 IEEE. In this paper, FPGA(Field Programmable Gate Array) hardware-in-loop co-simulation (Hardware co-simulation)is proposed for controller prototyping of Cascaded H-bridge multilevel inverter(CHBMLI). Third harmonics injected pulse width modulation(THIPWM) technique is used for controller prototyping. Mathematical analysis of THIPWM control is investigated for improved dc bus voltage utilization and extension of linearity range. Control model of THIPWM for five and seven level inverter incorporating Phase shifted and level shifted carrier signals are generated using Xilinx system generator(XSG) platform in Matlab/simulink. Real time Hardware co-simulation is performed by modelling CHBMLI system in Matlab/simulink and hardware co-simulation is performed using Zedboard Zynq development and evaluation FPGA kit.

DOI： 10.1109/CENCON.2017.8262453

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2016 IEEE. This paper describes the power speed characteristics of a novel double-stator permanent magnet generator integrated with a magnetic gear (MG) using 2-D finite element method (2D-FEM). The machine is proposed for low-speed applications and it has a novel structure with two iron ring pole pieces and three permanent magnet rotors consisting of an outer field PM, inner field PM and prime PM. A prototype of the proposed machine is constructed and tested experimentally. The power characteristics including voltage, current, torque and speed are analyzed and compared with the measured results. The measured power characteristics are in good agreement with the calculated results but there is limitation on the measured speed characteristics which is primarily due to the constraint on the transmission torque of the magnetic gear. The predicted and measured results validate the proposed machine design.

DOI： 10.1109/PECON.2016.7951624

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2016 IEEE. This paper presents a double-stator permanent magnet brushless DC machine (DS-PMBLDC) which is proposed to be used in light electric vehicles and to replace a typical motor for electric vehicles in future. However, to fulfill the limitation of motor performance at different conditions, electric vehicles require their own specific motor design. Thus, a modular type of motor which can easily replace the electrical motor based on requirements for the electric driving system in power train of an electric vehicle was proposed and discussed in this paper. The operating principle of the proposed machine is reported. Concentrated winding is adopted for the stators of a 9-slot 8-pole DS-PMBLDC machine. The cogging torque, back-EMF, air-gap flux density, torque and power characteristic have been analyzed using 2-dimensional Finite-Element Analysis (2D-FEA). Experimental and simulation results are compared and discussed. Theoretical analysis of the proposed machine show an efficiency of 80% and 75% efficiency in motoring and generating mode respectively. The 2D-FEA simulation results are in good agreement with the measurement results.

DOI： 10.1109/PECON.2016.7951665

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2017 The Society of Instrument and Control Engineers - SICE.The stability of the observer is an important concern for observer based sensorless control. This paper presents the stability analysis of observer used for high speed position sensorless control of surface permanent magnet synchronous motor (SPMSM). In this paper, extended induced voltage observer is utilized for high speed senseless control of SPMSM. The purpose of this study is to analyse the stability of extended induced voltage observer in discrete time domain. The experiment system of observed based sensorless control is developed using Texas Instrument (TI) development kit for motor control.

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2016 The Institute of Electrical Engineers of Japan. In this paper, we propose an off-line tuning method of a vibration suppression controller for a 2-mass position control system using Fictitious Reference Iterative Tuning (FRIT), which is one of direct controller tuning methods. Hence, we are able to design the controller using only initial experimental data without the state equations of the model and those parameters. The controller consists of P position controller, IP or PIP speed controller and PI current controller, which needs no information about the load side variables. Then, we confirmed its effectiveness of the proposed method by experiment.

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2016 The Institute of Electrical Engineers of Japan.This paper presents high speed position sensorless control of surface mount permanent magnet synchronous motor (SPMSM). The purpose of this study is to achieve high speed position sensorless control of SPMSM with high efficiency. In this paper, modified β axis induced observer is proposed for high speed control of SPMSM. In proposed observer based control induced voltages are modelled as a sinusoidal signal and dc component which is capable of estimating induced voltage and rotor position. The proposed observer based control is validated on Texas Instrument (TI) development kit for motor control and experimental system is investigated considering step response and disturbance response.

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2016 The Institute of Electrical Engineers of Japan. This paper proposes a suppression method of repulsion force between two axes that are set up in parallel and tightened together with a joint table used in a large-sized gantry type linear motor slider. The large-sized gantry type linear motor slider has an unique problem which is mechanical distortion. The distortion causes the repulsion force between each axis. Conventionally, two methods are proposed for this problem. However, these methods need the data about the measured distortion or some customized servo controllers. Therefore, this paper proposes the suppression method so that we can design a control system using general-purpose servo controllers without measuring the distortion or some customized servo controllers. The effectiveness of the proposed method is verified by experiments.

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2017 The Institute of Electrical Engineers of Japan. At present, many industrial carrier devices utilize linear motor sliders. However, a heavier load requires a linear motor (which is an example of a direct drive device) to get higher power, compared with a rotary motor with a ball screw slider (which is an example of an indirect drive device). In order to obtain higher power at a lower cost, a linear slider with multiple motors can be utilized, for example, a gantry type linear motor slider. Moving the gantry type slider requires two linear motors that are set up in parallel to enable synchronization control. Some conventional synchronization control methods have been proposed for the parallel twin linear slider; however, a large scaled gantry type linear motor slider has two unique problems: mechanical distortion caused by the limitations of installation environment and coupling caused by joints with low stiffness. This paper proposes a control model to solve these problems, and an identification method of each parameter. Furthermore, the effectiveness of the control model is verified by comparison with simulation results and experimental results.

DOI： 10.1541/ieejias.137.746

Scopus

CiNii Article

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

日本   横浜   2015年11月09日  -  2015年11月12日

DOI： 10.1109/IECON.2015.7392366

Scopus

担当区分：責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

日本   横浜   2015年11月09日  -  2015年11月12日

DOI： 10.1109/IECON.2015.7392788

Scopus

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

日本   横浜   2015年11月09日  -  2015年11月12日

DOI： 10.1109/IECON.2015.7392324

Scopus

記述言語：英語   掲載種別：研究論文（学術雑誌）

DOI： 10.1541/ieejjia.4.277

CiNii Article

その他リンク： https://www.jstage.jst.go.jp/article/ieejjia/4/3/4_277/_article/-char/ja/

記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2015 Elsevier Ltd. All rights reserved.In this paper solar photovoltaic (SPV) system connected to the utility grid is designed and simulated. The utility grid and SPV system are coupled with current controlled voltage source converter (VSC) and LCL filter. The design of LCL filter, MPPT algorithm and power quality improvements are discussed and simulation results are shown for the performance analysis of grid-coupled PV system under different load condition. The system is controlled through power balance theory method. The principle behind the control implementation is to evacuate the solar power generated during the daytime and the reactive power demand for the load should be supplied by the PV. The grid coupled system consists of SPV system, dc-dc boost converter, maximum power point tracking (MPPT), voltage source converter (VSC), LCL filter, different loads and three phase utility grid. This system is capable of eliminating harmonic and load balancing by supplying unbalanced current from the PV as a compensator. The system is simulated with 10 kW SPV array using indirect current control scheme.

DOI： 10.1016/j.ijepes.2015.01.018

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84922370827&origin=inward

記述言語：英語   掲載種別：研究論文（学術雑誌）

© School of Engineering, Taylor’s University.In this paper, the Unified Power Flow Controller (UPFC) using a matrix converter is studied. It is an adaptation of an approximate differentiation type PI-D controller. By setting appropriately the values of the gain controller, it is possible to stabilise the power of the transmission line by controlling the UPFC by a matrix converter. The matrix converter is a power conversion circuit that can convert an arbitrary phase and amplitude of the AC power directly to AC power. The principle of creating a switching pattern that adopts a Direct Duty ratio Pulse Width Modulation (DDPWM) scheme. The UPFC is a stationary device to adjust the grid voltage for controlling the power flow is inserted into the power system, and controls the transmission power according to the load variations. This is intended to stabilise the power system. Verification is done by simulation using MATLAB/Simulink for the validity of this proposed method.

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© School of Engineering, Taylor’s University.This paper proposes a digital hardware control of Permanent Magnet Synchronous Motor (PMSM) using a SiC MOSFET inverter implemented in a FPGA (Field Programmable Gate Array) device. High frequency is required using a SiC MOSFET inverter to obtain high response and good stability for speed control systems. Not only the switching frequency of inverter, but also the control frequency is achieved up to 100 kHz for speed control system of AC motor drive including vector control and dq transformation. As the result, high response control system of PMSM can be achieved. Digital hardware control based on FPGA is used to maximize the switching frequency of SiC MOSFET inverter. Finally, an experimental system is set up and some experimental results are demonstrated.

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© School of Engineering, Taylor’s University.Four different topologies of Multi Directional Matrix Converters (MDMC) are compared for use in low power applications. In the proposed small-scale power system the MDMC configuration with 12 bidirectional switches combined the desirable characteristics of the AC/AC conventional Matrix Converter (MC) and AC/DC single phase to single phase matrix converter. The indirect method with Space Vector Pulse Width Modulation (SVPWM) technique applied to the proposed MDMC configurations in order to control the power direction from power sources to loads. These four configurations have been simulated by MATLAB software and results are presented and discussed. Analyses and simulation results show that the MDMC with 12 bidirectional switches can run over a large input voltage and frequency range while controlling the power flow direction, compensate the fluctuating power and maintaining the excellent quality of output waveform in case of THD and DC current ripple.

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84934977732&origin=inward

記述言語：英語   掲載種別：研究論文（学術雑誌）

© School of Engineering, Taylor’s University.This paper proposes a new graphical method analysis to determine the triggering angle of the Neutral-Point-Clamped Multilevel Inverter (NPCMI). The proposed graphical method analysis utilised the ideal sinusoidal waveform as the basis of the calculation. Based on the desired sinusoidal output waveform and switching state of Neutral-Point-Clamped Multilevel Inverter, triggering angle of each switching devices are calculated and determined. The triggering angles have been calculated for 3-level, 5-level and 7-level. Total Harmonics Distortion (THD) values of line voltage and phase voltage are calculated and compared and it has been concluded that this method is successfully applied where the low THDs values are obtained.

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

その他リンク： http://jestec.taylors.edu.my/

記述言語：英語   掲載種別：研究論文（学術雑誌）

その他リンク： http://jestec.taylors.edu.my/

記述言語：英語   掲載種別：研究論文（学術雑誌）

その他リンク： http://jestec.taylors.edu.my/

記述言語：英語   掲載種別：研究論文（学術雑誌）

その他リンク： http://jestec.taylors.edu.my/

記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2014 Saman Toosi et al.This study presents a new modulation method for multidirectional matrix converter (MDMC), based on the direct duty ratio pulse width modulation (DDPWM). In this study, a new structure of MDMC has been proposed to control the power flow direction through the stand-alone battery based system and hybrid vehicle. The modulation method acts based on the average voltage over one switching period concept. Therefore, in order to determine the duty ratio for each switch, the instantaneous input voltages are captured and compared with triangular waveform continuously. By selecting the proper switching pattern and changing the slope of the carriers, the sinusoidal input current can be synthesized with high power factor and desired output voltage. The proposed system increases the discharging time of the battery by injecting the power to the system from the generator and battery at the same time. Thus, it makes the battery life longer and saves more energy. This paper also derived necessary equation for proposed modulation method as well as detail of analysis and modulation algorithm. The theoretical and modulation concepts presented have been verified in MATLAB simulation.

DOI： 10.1155/2014/645734

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

台湾   台中   2014年07月22日  -  2014年07月25日

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

台湾   台中   2014年07月22日  -  2014年07月25日

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

台湾   台中   2014年07月22日  -  2014年07月25日

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

This paper presents a new start-up method from standstill to a sensorless control for surface permanent magnet synchronous motor (SPMSM). To estimate the rotor position of SPMSM from the measured induced voltage, a DC current adds to the motor and nonlinear observer is introduced to the motor torque equation while the motor is vibrating. To achieve the start-up smoothly, first order induced voltage observer also calculates the rotor position during the vibration and the estimation method is replaced after a certain period of time. The validity of the proposed method is verified by experiments using DSP based voltage source inverter. © 2014 IEEE.

DOI： 10.1109/IPEC.2014.6869830

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

This paper proposes a novel method of suppressing inrush currents of squirrel-cage induction machines using matrix converter in wind power generation systems. In the proposed method, the series-connected side of the matrix converter behaves as a resistor for the induction machine current. Digital computer simulation is implemented to confirm the validity and practicability of the proposed method using PSCAD/EMTDC. Simulation results demonstrate that the proposed inrush current suppressor can suppress the inrush current perfectly. © 2014 IEEE.

DOI： 10.1109/IPEC.2014.6869636

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

In this paper, a new design method of vibration suppression controller for multi-mass (especially, 2-mass) resonance systems is proposed. The controller consists of a digital modified-IPD controller for speed loop and a digital PI controller for current minor loop. The six controller gains are determined by Differential Evolution algorithm. The Differential Evolution is one of optimization techniques and a kind of evolutionary computation technique. In this paper, we have applied the DE/rand/1/bin strategy to design swift the optimal controller parameters. Furthermore, we consider the parameter identification method of 2-inertia experiment system by the Differential Evolution. Finally, the effectiveness of the proposal methods has been confirmed by the computer simulations and the experiments. © 2014 IEEE.

DOI： 10.1109/IPEC.2014.6869937

Scopus

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記述言語：日本語   掲載種別：研究論文（学術雑誌）

This paper proposes a novel co-operational control method of LED driver, consisting of voltage and current sourced flyback converters. In the proposed method, both the flyback converters are controlled by the LED reference current to obtain wide range variable light control from 10 % to 100 %. Digital computer simulation is implemented to confirm the validity of the proposed method and demonstrate that the minimum on time of the MOSFET is longer than 1 &mu;s even under the operation of 10 % of the LED rated current.

DOI： 10.5416/jipe.40.168

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130005144219

記述言語：日本語   掲載種別：研究論文（学術雑誌）

DOI： 10.5416/jipe.40.194

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130005144227

記述言語：日本語   掲載種別：研究論文（学術雑誌）

DOI： 10.5416/jipe.40.219

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130005144287

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

In this paper, a new design method of vibration suppression controller for multi-mass (especially, 3-mass) resonance systems is proposed. The controller consists of a fuzzy controller for speed loop and a PI controller for current minor loop. The three scaling factor of the fuzzy controller and two PI controller gains are determined by Differential Evolution (DE). Comparing with the conventional design algorithm, the proposed technique is able to shorten the time of the controller design to a large extent and to obtain accurate results. Finally, we confirmed the effectiveness of the proposal method by the computer simulations. © 2013 IEEE.

DOI： 10.1109/ICEMS.2013.6713239

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84893768629&origin=inward

記述言語：英語   掲載種別：研究論文（学術雑誌）

DOI： 10.1541/ieejjia.2.315

その他リンク： https://www.jstage.jst.go.jp/article/ieejjia/2/6/2_315/_article

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

This paper presents a new controller design method using the coefficient diagram method (CDM) for matrix converters (MCs). MCs are able to convert AC to AC power directly without DC link capacitors. In this paper MCs are used in unified power flow controllers (UPFCs), which is one of the flexible AC transmission system (FACTS) devices located in the transmission line. The CDM is an effective method for designing adequate gains in a PID controller but is not convenient for solving the complex characteristic polynomials of non-standard systems such as the multiplication of controller gains or multi-input-multi-output systems. We propose to combine CDMs with Particle Swarm Optimization (PSO). PSO is employed for searching the near optimal diagram. Our proposed method is applied to a simple transmission line and the validity of the proposed method is shown using MATLAB/Simulink simulation.

DOI： 10.14243/jsaem.21.369

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/10031192102

担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

日本   北九州   2013年04月  -  2013年04月

DOI： 10.1109/PEDS.2013.6527120

Scopus

担当区分：責任著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

日本   北九州   2013年04月  -  2013年04月

DOI： 10.1109/PEDS.2013.6527035

Scopus

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

日本   北九州   2013年04月  -  2013年04月

DOI： 10.1109/PEDS.2013.6527152

Scopus

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

This paper proposes a novel method of suppressing inrush currents of squirrel-cage induction machines using matrix converters in wind power generation systems. In the proposed method, the output side of the matrix converter behaves as a resistor for the source current and the input side of the matrix converter compensates reactive power of the squirrel-cage induction machine. Digital computer simulation is implemented to confirm the validity and practicability of the proposed method using PSCAD/EMTDC. Simulation results demonstrate that the proposed inrush current suppressor can suppress the inrush current drastically. © 2012 IEEE.

DOI： 10.1109/ICRERA.2012.6477303

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

This paper discusses to conduct experimental verification of two types of micro electric vehicles (EV) in order to realize improvement in electric mileage and shorten a charging time of the battery. First, electric double layer capacitors (EDLC) to use as a secondary battery are proposed. The internal resistance of EDLC is small compared with a rechargeable battery, and it is suitable for momentary charge-discharge of EV. Next, control circuits of the capacitors to increase the regenerative electric power are utilized. Then, a novel method to charge a main battery of the EV is introduced. Finally, experimental results demonstrate the validity of the proposed method. © 2012 IEEJ Industry Appl Soc.

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

Unified Power Flow Controller offers a new alternative to power system control. In this work, a closed-loop controllable UPFC has been designed and developed using active power transfer and reactive power compensation algorithm. These algorithms allow the UPFC to operate automatically under varying load conditions and able to stabilize the busbar voltage with required power supplied to the load. From the results obtained, it has been shown that the active power demanded by the load is being supplied by the SSSC by controlling the angle θ 23, i.e the phase angle between voltage V 2 and V 3. With this angle θ 23, the SSSC will transfer the correct amount of active power to the load. At the same time, the SSSC will also transfer a small amount of reactive power to the load. The angle of θ 23 is obtained from active power transfer algorithm where it will determine the value of additional voltage magnitude, |ΔV| and phase shift, φ. The STATCOM will supply or absorb the reactive power required by the system. This is carried out by injecting current at the point of connection using reactive power compensation algorithm where it will compare the difference between system voltage, V system and STATCOM voltage, V shunt. © 2012 Praise Worthy Prize S.r.l. - All rights reserved.

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

DOI： 10.1109/PEDS.2011.6147361

Scopus

記述言語：英語   掲載種別：研究論文（学術雑誌）

DOI： 10.3390/en4111937

Scopus

その他リンク： https://www.mdpi.com/journal/energies

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/110008904213

記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：日本語   掲載種別：研究論文（研究会，シンポジウム資料等）

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/10029264411

記述言語：英語   掲載種別：研究論文（学術雑誌）

DOI： 10.1109/TIE.2010.2066537

Scopus

記述言語：日本語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

主要雑誌 代表的研究業績

DOI： 10.1109/TIA.2010.2091670

Scopus

記述言語：日本語   掲載種別：研究論文（その他学術会議資料等）

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

札幌   2010年06月21日  -  2010年06月24日

主要論文集（会議）

DOI： 10.1109/IPEC.2010.5543553

Scopus

記述言語：日本語   掲載種別：研究論文（学術雑誌）

The casing of a large scale turbine generator is filled with hydrogen gas as a coolant. To prevent the hydrogen gas from leak, hydrogen-tight enclosures and seal rings are located at both ends of the casing. In some conditions, the gap between the seal ring and rotor shaft might be reduced to cause a rub. The rub sometimes cause a significant vibration. In order to solve the problem, we tried to make a guideline to evaluate the posibility of rubbing vibration occurrence by using each effective parameter with setting some assumption and confirming the consistency between analysis result and actual phenomena.

DOI： 10.1299/kikaic.76.1655

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/110007682155

記述言語：英語   掲載種別：研究論文（学術雑誌）

This paper presents a method for estimating the torque and rotational speed of line-start induction motors for motoroperated valves. Routine inspections of the valves are carried out because motor-operated valves are used in momentous plants such as power plants where securing, the reliability of the valves are very important. Movement environments in these plants are characterized by high temperature and humidity and therefore, it is difficult to position sensors near motors. In such a case, we must troubleshoot the system without using torque or speed sensors. The proposed method can estimate the torque and speed of an induction motor by using currents and voltages near the switchboard. Furthermore, we propose the parameter identification of mutual inductance by comparing the scalar and vector products between currents and voltages. The proposed method is validated by experimental results. © 2009 The Institute of Electrical Engineers of Japan.

DOI： 10.1541/ieejias.129.825

Scopus

CiNii Article

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

In this paper, a new design method of vibration suppression controller for a 3-Mass system is proposed. The controller consists of a digital modified-IPD controller for speed loop and a digital PI controller for current minor loop. We apply an off-line tuning using a Particle Swarm Optimization for the determination of the six controller gains. To confirm the effectiveness of the proposed method, a real-time experimental setup based on a RT-Linux is used.

DOI： 10.1109/ICEMS.2009.5382667

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

This paper presents an estimation method of rotational direction and speed for free running AC machines driven by an inverter without speed and voltage sensor. The method has four estimation modes, and the method utilized only the measured phase current of machines. The amplitude of current during the estimation is suppressed to lower levels such as the exciting current, which is smaller than the rated value . Good performance of this method is confirmed by the experiment.

DOI： 10.1109/ICEMS.2009.5382762

Scopus

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

This paper proposes a novel digital hardware control of motor drive system implemented in FPGA (Field Programmable Gate Array) not only a current control loop but also a speed control loop. In addition, to decrease a torque ripple caused by a PWM switching, linear servo amplifiers are employed for the driving source. As the results of using hard ware control, high precision speed control system of PMSM (Permanent Magnet Synchronous Motor) with 5μs control period is achieved.

DOI： 10.1109/ICEMS.2009.5382719

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77950604274&origin=inward

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

l   東京都   2009年11月  -  2009年11月

主要論文集（会議）

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

l   東京都   2009年11月  -  2009年11月

主要論文集（会議）

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

This paper proposes a sensorless control of SynRM (synchronous reluctance motor). It can calculate the motor flux from an armature voltage and a current directly. The proposed estimator is able to eliminate both the dc offset and harmonic component of the armature current which cause the estimation error. State observer based Fourier Transformation called RFT (Recursive Fourier Transformation) is effective to estimate the fundamental component of the flux. Also a block pulse approximation is used to convert a continuous time state equation to a difference equation to reduce the calculation time. The validity of the proposed method is shown in the experimental results.

DOI： 10.1109/ICIT.2009.4939530

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

Australia   メルボルン   2009年02月10日  -  2009年02月13日

主要論文集（会議）

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

This paper proposes a novel digital hardware control motor drive system using a FPGA (Field Programmable Gate Array) device. We implement not only a current minor loop but also a speed control loop in the hardware device. We achieve 5μs period for speed control system of AC motor drive including dq transformation, decoupling control and dead-time compensator, and as a result current ripple and the motor torque ripple is decreased using the dead-time compensator. Experimental results show the validity of the proposed system. © 2008 IEEE.

DOI： 10.1109/ICELMACH.2008.4799962

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

Portugal   2008年09月  -  2008年09月

主要論文集（会議）

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

Portugal   2008年09月  -  2008年09月

主要論文集（会議）

記述言語：英語   掲載種別：研究論文（学術雑誌）

主要雑誌 代表的研究業績

記述言語：英語   掲載種別：研究論文（学術雑誌）

Vibration caused by mechanical resonance and time delay caused by signal detection and transmission degrade the control performance of a servo controller for a multimass mechanical system. A precise numerical model that represents resonance characteristics and time delay is necessary to design a desired control system. This paper presents an identification method using the iterative process of the linearized and weighted total least-squares method. The proposed method derives a transfer function without any prior knowledge of resonance characteristics and time delay. The order of the transfer function is determined with a coefficient diagram that shows coefficients of the denominator of the transfer function. Identification results with an experimental setup are shown to demonstrate the performance of the proposed method. A velocity servo controller with vibration-suppression control is designed with the transfer function, and control performance is verified with the experimental setup to validate the transfer function. © 2008 IEEE.

DOI： 10.1109/TIA.2008.916601

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

In this paper a very low speed sensorless vector control of synchronous reluctance motor with a novel startup scheme is presented. The estimation of speed and rotor angle is based on extended programmable cascaded low pass Alter (EPCLPF) which reduces the dc-offset effect at low speed area effectively. Thus the sensorless control at very low speed area is possible. At startup condition, the rotor angle is assumed rotating at synchronous speed, and because the estimation rotor angle is valid at very low speed, its error decreases rapidly after the initial rotor movement. Thus motor start up without torque jerk is achieved. The experimental results, which are done by a RT-Linux pc based system, show the estimated and the actual rotor angle at very low speed region are agreed and sensorless vector control is achieved at very low speed area as well as high speed. Also the motor startup at standstill condition is possible. © 2007 IEEE.

DOI： 10.1109/APEX.2007.357544

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

In this paper, a robust vibration suppression control method for a multi-inertia (a three-inertia and a four-inertia) system by a digital modified-IPD controller is proposed. The controller consists of integral, proportional, derivative and time lag of first order element. We apply the Taguchi Method for the determination of the controller gains for several noise factors (load side inertias and stiffness of the shafts). To confirm the effectiveness of the controller structure with several conditions and the tuning method, we use a real-time simulator based on a RTLinux.

DOI： 10.1109/ICEMS.2007.4412116

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

Korea   ソウル   2007年10月08日  -  2007年10月11日

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

This paper presents a novel vibration suppression method for a 3-inertia control system by a modifiedIPD (Integral plus Proportional plus Derivative) controller. In the IPD structure, the integral action integrates the error between the designed output and the plant output, and the proportional and derivative terms act on the plant output only. The modified form introduces one extra parameter for added flexibility. We apply the Taguchi Method for the determination of the controller gains. The effectiveness of the method is verified by simulations. ©2006 IEEE.

DOI： 10.1109/SPEEDAM.2006.1649922

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

A mechanical resonance and time delay degrade the control performance. In order to design a desired control system, a precise numerical model that represents resonance characteristics and time delay in a mechanical system to be controlled is necessary. This paper presents an identification method using the iterative process of the linearized and weighted total least squares method. The proposed identification method derives a transfer function without any prior knowledge of resonance characteristics and time delay. The order of the transfer function is determined by using a coefficient diagram that shows coefficients of the denominator of the transfer function. Identification results for a three-mass and a four-mass experimental system are shown to demonstrate the performance of the proposed identification method. © 2006 IEEE.

DOI： 10.1109/IECON.2006.347258

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

長崎市   2006年11月21日  -  2006年11月23日

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

長崎市   2006年11月21日  -  2006年11月23日

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

長崎市   2006年11月21日  -  2006年11月23日

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

Rotor angle calculation using flux estimation is a straightforward approach to sensorless control of synchronous reluctance motor (SYRM), but the dc offset can cause an increasing error in pure integrator used in this estimator. In this paper to control motor at low speed region a modified programmable cascaded low pass filters (MPCPLF) is proposed. MPCLPF is suggested because programmable cascade low pass filters (PCLPF), which has previously been applied to induction motors, has some problems in low speed area. In addition PCLPF is affected by the parameter fluctuation. To overcome the problem an online parameter identification method based on block pulse function also is proposed. In this method the parameter identification is not affected by position estimation accuracy. The experimental system includes a PC-based control with real time Linux as operating system. And to acquire data form sensors and to send commands to the system an ALTERA Complex Programmable Logic Device (CPLD) is used. The experimental results show the proposed method performs well and speed estimation, angles estimation and parameter identification are correct. Also it is shown sensorless vector control is achieved at low speed as well as high speed using proposed method. © 2006 IEEE.

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記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：日本語   掲載種別：研究論文（学術雑誌）

主要雑誌 代表的研究業績

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

An online real time simulator for a RTLinux based speed control system of SPMSM (Surface Permanent Magnet Synchronous Motors) is proposed. For realization of the online real time simulator, a motor mathematical model based on the three phase stationary coordinate is solved using a fourth order Runge-Kutta algorithm in real time. The Runge-Kutta algorithm is required since the model includes non-linear operation, such as, trigonometric functions, square waves generated by a PWM inverter and limiter circuits, so on. The experimental system based on the RTLinux accomplishes both the motor control and the real time simulation at the same time in 200 μs control period. The online simulation results show considerable coincidence with the experimental results.

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

An online real time simulator for a RTLinux based speed control system of SPMSM (Surface Permanent Magnet Synchronous Motors) is proposed. For realization of the online real time simulator, a motor mathematical model based on the three phase stationary coordinate is solved using a fourth order Runge-Kutta algorithm in real time. The Runge-Kutta algorithm is required since the model includes non-linear operation, such as, trigonometric functions, square waves generated by a PWM inverter and limiter circuits, so on. The experimental system based on the RTLinux accomplishes both the motor control and the real time simulation at the same time in 200&mu;s control period. The online simulation results show considerable coincidence with the experimental results.

DOI： 10.1541/ieejias.126.453

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/10017539068

記述言語：英語   掲載種別：研究論文（学術雑誌）

代表的研究業績

記述言語：英語   掲載種別：研究論文（その他学術会議資料等）

代表的研究業績

担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（研究会，シンポジウム資料等）

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/10019204430

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

Malaysia   2005年11月28日  -  2005年12月02日

代表的研究業績

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

Malaysia   2005年11月29日  -  2005年12月02日

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

RTLinux based online real time simulator for speed control system of SPMSM (Surface Permanent Magnet Synchronous Motors) is proposed. For realization of the online real time simulator, a motor mathematical model based on the three phase stationary coordinate is solved using a Single Term Block Pulse Function (STBPF) and system analysis in real time. The STBPF analysis is one of the linearized model approximation so that it is more simple and it saves more calculation time compared with the other numerical analysis method, such as a Runge-Kutta algorithm. In addition, the proposed method can simulate the system more precisely by a variable width of the orthogonal input state, so it is suitable to solve an inverter model which generates the PWM pulse and the dead time effect, so on. The experimental system is based on the RTLinux and this accomplishes both the motor control and the real time simulation at the same time in 200 μs control period. Experimental results show that the online simulation results show considerable coincidence with the experimental results. © 2005 IEEE.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

Speed sensorless control of synchronous reluctance motor (SYRM) recently has deserved attention because of its advantages. Although rotor angle calculation using flux estimation is a simple approach, the dc offset can cause an increasing error in pure integrator used in this estimator. In this paper to control motor at low speed region a modified programmable cascaded low pass filter (PCPLF) is proposed. The use of PCLPF has previously been applied to induction motors. However it can make some problems especially at low speeds. Hence in this paper to avoid of the PCLPF drawbacks a novel method is suggested. The experimental system includes a PC-based control with real time Linux as operating system. And to acquire data form sensors and to send commands to the system an ALTERA Complex Programmable Logic Device (CPLD) is used. The experimental results show the proposed method performs well and speed and angle estimation is correct also sensorless vector control is achieved at low speed as well as high speed using the proposed method. © 2005 IEEE.

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

新潟市   2005年04月02日  -  2005年04月05日

主要論文集（会議） 代表的研究業績

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

新潟市   2005年04月02日  -  2005年04月05日

主要論文集（会議）

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

Vibration suppression controls of two-inertia systems have been proposed by many researchers. However, for threeinertia systems, it is difficult to obtain the adequate gains of the PID controller, which suppress the vibration of the speed of the load side. The Coefficient Diagram Method (CDM) that can design the optimum controller's gains for the 2-inertia systems has been proposed. In this paper, the control method of vibration of multi-inertia systems, such as 3-inertia and 4-inertia systems, based on the CDM is proposed. Especially, the coefficient diagram is used to determine the controller gains. The validity of the proposed method is shown by the computer simulation for both the 3-inertia system and the 4-inertia one. Furthermore experimental results is also presented for the 3-inertia system.© 2004, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI： 10.1541/ieejias.124.878

Scopus

CiNii Article

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記述言語：日本語   掲載種別：研究論文（学術雑誌）

主要雑誌 代表的研究業績

記述言語：英語   掲載種別：研究論文（その他学術会議資料等）

札幌市   2004年07月04日  -  2004年07月08日

国際会議

記述言語：英語   掲載種別：研究論文（その他学術会議資料等）

札幌市   2004年07月04日  -  2004年07月08日

主要論文集（会議） 国際会議

記述言語：英語   掲載種別：研究論文（その他学術会議資料等）

北九州市   2004年03月08日  -  2004年03月09日

国際会議

記述言語：英語   掲載種別：研究論文（その他学術会議資料等）

北九州市   2004年03月08日  -  2004年03月09日

国際会議

記述言語：英語   掲載種別：研究論文（その他学術会議資料等）

北九州市   2004年03月08日  -  2004年03月09日

国際会議

記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（その他学術会議資料等）

Brugee, Belgium   2002年08月25日  -  2002年08月28日

記述言語：英語   掲載種別：研究論文（その他学術会議資料等）

Osaka, Japan   2002年04月02日  -  2002年04月05日

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

© 2002 IEEE. In this paper a novel sensorless speed control of a synchronous reluctance motor (Syn.RM) is presented. The sensorless control is based on the modified flux linkage observer which is proposed by the authors for a permanent magnet synchronous motor (PMSM), and the theory is applied to Syn.RM here. The observer is able to estimate the modified flux linkage and the electromotive force (EMF) simultaneously. The motor speed and the rotor position are calculated from these estimated values. The validity of the proposed method is verified by experiment using the RTLinux.

DOI： 10.1109/PCC.2002.997604

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記述言語：英語   掲載種別：研究論文（その他学術会議資料等）

記述言語：英語   掲載種別：研究論文（学術雑誌）

In this paper, we propose a vibration suppression method for a 2-inertia speed control system by a fuzzy controller. We also apply a genetic algorithm (GA) for the determination of the scaling factors. The effectiveness of the method has been verified by experiments. © 2001, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI： 10.1541/ieejias.121.996

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担当区分：筆頭著者   記述言語：日本語   掲載種別：記事・総説・解説・論説等（学術雑誌）

DOI： 10.1541/ieejjournal.120.742

CiNii Article

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

A new friction compensation technique for the implementation of the frictionless motion of the robot manipulator is presented using the observer-based sliding mode control (SMC). The proposed technique consists of the SMC and the state and disturbance observer, and provides the advantage of improving the practical limitation of the SMC such as the chattering. The design method of the proposed SMC is presented for one link of the robot manipulator. The proposed SMC is implemented in the PC-based digital control system and the experiments are carried out for the actual robot manipulator. The results well verify the effectiveness of the proposed SMC.

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記述言語：英語   掲載種別：研究論文（学術雑誌）

This paper demonstrates a new and simple speed estimation method for the induction motor (IM) drives at low speeds. This method uses the current and the input voltage in a closed loop for rotor parameter estimation. In this method, a digital system expression is considered where we assume that the rotor flux and the rotating speed are constant during a short sampling period. Simulation and experimental results demonstrate the validity of the proposed estimation algorithm for practical applications. © 2000, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI： 10.1541/ieejias.120.1165

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記述言語：日本語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

Recently, high precision and fast response motor drive systems are increasingly used in many industrial applications. With the development of control theories and equipment, the system response has become faster and faster, while the stiffness has reduced due to miniaturization and weight reduction of the equipment. As the result, the system has to be treated as a resonance system in some cases, so that some effective control methods to suppress the vibration are proposed. Based on the pole placement approach, we have proposed a vibration suppression control method of the 2-inertia speed and position control systems which need no information about the load side variables. However, this method needs a lot of computation and the characteristic equation for the system must be changed according to the change of the inertia ratio. In this paper, we apply a genetic algorithm (GA) for the determination of the controller gains. Simulation results reveal that the proposed method is even useful for wide range of the inertia ratio and can get the solution quickly. Finally, the effectiveness of the proposed method has been verified by experiments. © 2000, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI： 10.1541/ieejias.120.838

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記述言語：英語   掲載種別：研究論文（学術雑誌）

This paper examined the robustness of former presented estimation method, that is made under very simple assumption of that, during short period of PWM control both electrical angle and electrical speed of AC servo-motor do not vary. In each PWM periods control input is known, currents is measurable, then position and speed as parameters can be solved. Over 0.06 (p. u.) of speed command estimated position and speed had good accuracy, and smooth sensor-less control was achieved. Under 0.06 (p. u.) of speed command, 6-th harmonics in estimated position became harmful then correction using the Newton's Method is taken. Even these correction effort residues of correction error could not diminished. To reduce the effects of correction error, feed-forward voltage in control inputs are employed and gains of feedback was low downed. On this estimation, machine parameters, armature resistance and reactance are supposed as constant. But they may be change according to temperature rise and magnetic saturation. Moreover they includes some errors. Even these problems under very short PWM interval changes of estimated EMFs are small enough then machine parameters disappear from estimate equation. Then this estimation method is robust from parameter changes. This estimation method stands on estimation of back EMFs. Then it can not apply on zero speed. But experimental result shows a sensor-less start up under proposed estimation method without any other equipment is capable without any auxiliary equipment. © 2000, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI： 10.1541/ieejias.120.884

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

Recently, many methods of sensor-less control of PMSM (Permanent Magnet Synchronous Motor) are proposed. One of the methods is based on an induced voltage estimation using a disturbance observer. Though this method has a simple structure and it is convenient to realize the system, it has some disadvantages, for example, the estimation error occurs in a high speed operation area. In this paper, we propose a new sensor-less control of a cylindrical type PMSM based on the estimation of the induced voltage. We combine the induced voltage with the flux linkage by integrating the induced voltage to estimate the motor angular speed. As our proposed method does not need the induced voltage constant to estimate the motor speed, the estimation error is small even if the induced voltage constant is changed. Finally, the effectiveness of the proposed method has been verified by experiments. © 2000, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI： 10.1541/ieejias.120.877

Scopus

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

A modified induced voltage observer is proposed as a technique for realizing sensorless control of brushless direct current motor (BLDCM). By calculating the speed and position using the proposed technique, a response equal to the case with sensor can be obtained not only in steady state but also in transient state without the effect of the harmonics. This is confirmed by a test machines.

DOI： 10.1002/(SICI)1520-6416(19991115)129:2<87::AID-EEJ10>3.0.CO;2-S

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記述言語：日本語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

In this paper, we propose a vibration suppression method for position control including a speed minor loop designed by pole placement approach. Experimental results show the validity of our proposed. © 1999, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI： 10.1541/ieejias.119.544

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記述言語：日本語   掲載種別：研究論文（学術雑誌）

記述言語：日本語   掲載種別：研究論文（学術雑誌）

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

DOI： 10.1541/ieejias.118.951

Scopus

CiNii Article

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

Brushless DC Motor (BLDCM) systems, which consist of a permanent magnet synchronous motor (PMSM), an inverter, and a position sensor mounted on the motor shaft, have recently become widely used in many industrial applications. However, when trying to make a high precision control for the BLDCM, such as making the steady state error less than 0.01% of the rating speed, the effect of the small torque ripple which does not appear in the DC Motors cannot be ignored. This torque ripple in BLDCM is mainly due to fluctuations of the field distribution, the intluence of the switching dead time and the cogging torque. The offset error and the unbalanced gain between each phase of the current detector also contribute to the periodical disturbance. This paper presents a new control method for small vibration suppression. We propose a new disturbance torque model which consists of several kinds of periodical components and a DC component. As the state space observer theory can be applied to this model, an observer based approach is used to estimate the amplitude and the phase of these periodical disturbances assuming that the frequency is known. The estimated torque is fed to the current reference to suppress the vibration. This method can be applied not only to a constant speed control system but also to a variable speed control system. Experimental results show the validity of the proposal method. © 1997, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI： 10.1541/ieejias.117.335

Scopus

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記述言語：日本語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：日本語   掲載種別：研究論文（学術雑誌）

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

Recently, motor drive systems are increasingly used in many industrial applications such as steel rolling mills, NC machines and robots. With the development of control theory and equipment, the system response has become faster and faster, while the stiffness of the system decreases because of miniaturization and weight reduction of the equipment. As the result, the system has to be treated as a resonance one in some cases. Several control methods such as with H1c controller or pole assignment approach have been proposed, among which the resonance ratio control is a very effective method. In these methods, a disturbance observer is usuallyused to estimate the torsional torque. If there are errors in the outputs of the observer, it is difficult to obtain the desired control characteristics. Copyright © 1997, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI： 10.1541/ieejias.117.1455

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記述言語：日本語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：日本語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）

DOI： 10.1541/ieejias.116.501

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その他リンク： https://ci.nii.ac.jp/naid/10001788346

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

DOI： 10.1541/ieejias.116.104

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記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：日本語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

Recently, many researches for vibration suppression control of 2-mass systems have been reported because the effects of non-stiff coupling cannot be ignored when a faster speed response is required for motor driving systems. An observer based approach is one of the representative methods to suppress the vibration which assumes that the disturbance torque changes very slowly, or even is constant during the sampling period, and uses a disturbance observer to estimate the tortional torque. And the systems are almost analyzed as continuous time ones. But in case that the system is composed of small equipment, the resonance frequency becomes high enough to be close to the sampling frequency of the speed detector, so we have to use high gains for the observer with the result that the noise and parameter error have strong effects on the calculation of the observer. In this paper, treating the system as a discrete time one, we propose a novel vibration suppression control method. Assuming that the torsional torque is composed of a periodic component and dc component, we use PI type controller for the speed control system and feed the estimation torque forward to the current reference to suppress the vibration. Experimental results show the validity of the proposal method. © 1995, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI： 10.1541/ieejias.115.1325

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記述言語：日本語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

We have proposed two design methods of AC/DC thyristor converter current control systems with MRAC (Model Reference Adaptive Control). To linearize the input/output relation of the systems, we dealt with the constant term of the model in different ways. In the first method, we made a linear transformation of the control input, while in the second one, neglected the constant term and compensated modeling error by integral adaptation. Computer simulations and experiments have shown that the control performances of the MRAC systems are much better than that of PI controllers. But in the first one, as the variable vector is not persistently spanning, the convergence rate of estimated parameters is not as high as expected. The second one has better dynamic characteristics but its stability has not been proved in theory.<br>This paper suggests a new design method in which the constant term is considered as a deterministic disturbance. The feature of this method is: by introducing an equality equation which makes the term of disturbances unobservable apparently, we can eliminate the effect of disturbances, and can use the existing adaptive control scheme without disturbances whose stability has been theoretically proved. Computer simulations and experiments show that the new method can obtain better responses than the old ones.

DOI： 10.1541/ieejias.113.632

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担当区分：筆頭著者   記述言語：日本語   掲載種別：研究論文（学術雑誌）

DC motor drive systems are still widely used in many industrial applications because of their simpler controllers compared with AC motor systems. To realize the desired control performances, system parameters are important for modeling and analysis. Usually, some parameters of a motor are given by manufactures, and others can be measured or calculated by users. But from the standpoint of the entire systems, it is hard to measure the parameters collectively. Especially, since carbon brushes are used in DC motors, their contact resistance and voltage drop vary depending on running condition. In this paper, we propose a parameter estimation method on the basis of the theory of least mean square method. In this method, we use a model of DC motor which takes account of the voltage drop, and introduce block pulse functions which is one of the ways to approximate function as a linear combination of a set of orthogonal basis functions. The parameters of the entire system can be estimated on-line. We use a Transputer to realize on-line estimation. Experimental results shows the validity of the estimation method.

DOI： 10.1541/ieejias.113.1138

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その他リンク： https://ci.nii.ac.jp/naid/130000959953

記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：日本語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

In current control systems of AC/DC thyristor converters, digital PI controllers are usually used. But in case of lacking the knowledge about the parameters of the systems, it is difficult to choose appropriate values of gains. Moreover, the control characteristic of a PI controller will change when the input signal reaches its upper or lower bound. This paper presents a new controller by using MRAC (Model Reference Adaptive Control) theory. First, the unified discrete-time model for the full range of the control angle is derived. Next, based on the strict model and the approximate one respectively, two design methods of the MRAC controller are proposed. With the approximate model, the number of the identified parameters can be reduced and the convergence speed of the patameters is high. Finally, the results of computer simulation and experiment show that the MRAC controller is stable, and it's dynamic characteristic is much better than that of PI controllers. © 1992, The Institute of Electrical Engineers of Japan. All rights reserved.

DOI： 10.1541/ieejias.112.630

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

DOI： 10.1541/ieejias.112.673

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

A software-implemented control system of DC motor (DCM) with reduced-order observer is presented. In the proposed model, an estimated speed is calculated using an armature current. The load torque is assumed to be constant in the analysis of the system, at first. In the case of dynamic load change, a torque feedforward control system is considered. Moreover, the design of the speed observer and the load torque observer is discussed. The main drive system is constructed using a 400-W DCM, and another motor of the same type is coupled as a load. The period of the bridge connected transistor converter is 250 μs, and the total processing period is 1 ms. The converter is modeled by a sample-hold model, and digital proportional-plus-integral controllers are used both in the speed-control loop and in the current-control loop. The validity of the proposed model and analysis is confirmed by comparing the simulation results on the speed response with experimental results.

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記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：日本語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：日本語   掲載種別：研究論文（学術雑誌）

DOI： 10.1541/ieejeiss1987.107.3_284

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その他リンク： https://ci.nii.ac.jp/naid/130006842888

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