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 reports on evaluation of inverter system using silicon carbide (SiC) power module with a novel packaging technology of Ni micro plating bonding. The power module is developed to make the structure maximize the performance of SiC attracting attention in recent years. As a result, it was found that the developed inverter reduces the inverter loss and improves the efficiency of the entire inverter system as compared with in-vehicle product using Si-IGBT and the inverter consisting of the conventional package structure using SiC MOSFET. Moreover, it was confirmed that switching was possible even when the chip temperature exceeded 200°C, suggesting that the developed inverter can be driven under the high temperature environment.

DOI： 10.1109/IWIPP.2019.8799079

Scopus

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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）

担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

CiNii Research

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）

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. Aiming for application to the inverter system of HEV and EV, we have developed a novel packaging technique for SiC power devices based on Nickel Micro Plating Bonding (NMPB) technique. We implemented heat resistant mounting of SiC schottky barrier diode (SBD) on the TO247 type package and confirmed the rectifying behavior even after the high temperature storage for 500hr at 250°C without any significant degradations. We also fabricated one-leg inverter modules mounting SBDs and MOSFETs using newly designed lead frames for NMPB process. The module showed normal rectifying and switching behavior even at high temperature such as about 250°C.

DOI： 10.1109/ECTC.2017.103

Scopus

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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）

© 2017 IEEE. This paper deal with structure for low inductance and high heat operation of silicon carbide (SiC) power module, which attracts attention in terms of high withstand voltage, high efficiency and high heat operation in recent years. First, the parasitic inductance of the power module of two types of structure; a conventional structure which forms the current path in a planar manner and a structure formed three-dimensionally is investigated using electromagnetic field analysis. In addition, thermal resistance of two types of power modules are experimentally evaluated from heat radiation performance. Experimental and simulated results reveals that the three-dimensionally formed power module is superior in the current path, resulting in lower parasitic inductance as well as smaller switching loss. Moreover, on state resistance and leakage current are evaluated at the junction temperature of 250 °C and the problems of power module package under high temperature environment is also investigated.

DOI： 10.1109/IWIPP.2017.7936767

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）

© 2017 Wiley Periodicals, Inc. In this paper, a driving method for an interior permanent magnet (IPM) motor is proposed; this method increases the system efficiency in the constant power region. In the driving method, the pulse width modulation inverter with a voltage booster system allows the use of both flux weakening control (FWC) and dc link voltage control (DVC) to drive an IPM motor at high speed. The authors investigate how a combination of FWC and DVC is suitable for the system. First, a simulation model is introduced. This model allows the calculation of the system efficiency and each part of the system losses in the voltage booster, inverter, and IPM motor. Furthermore, the system efficiency is calculated using the simulation model, and the simulation results are discussed when the ratio between the FWC and the DVC is changed. The IPM motor drive method is expected to help achievement of high efficiency by adjusting the ratio between the two control methods in the constant power region.

DOI： 10.1002/ecj.11946

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 deals with a developed system that allows to drive an induction motor and charge a battery using wireless power transfer (WPT) for automated guided vehicle (AGV). The developed system enables to control output voltage of WPT by constantly moving the receiving coil and adjusting the gap length. It is desired that the system should withstand high voltage, and reduce copper loss and conduction loss in coil and power conversion circuits, respectively, to achieve high efficiency for the system. However, methods for determining the output voltage in the WPT system for AGVs has not been investigated yet. From the viewpoints, we investigate the allowable maximum output voltage provided by the developed WPT system. The maximum voltage is calculated using control equations including parameters of voltage booster, power supply voltage and battery current when the battery current control is adopted. Furthermore, experimental results reveal that the battery current control cannot be used beyond a maximum DC link voltage. In addition, a properly selected gap length of the coil is found to allow an induction motor to be driven and the battery to be charged using the WPT system. As a result, it is clarified by the experiments that the developed control system provides additively effective function to WPT for AGVs.

DOI： 10.1109/TENCON.2016.7848114

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）

© 2015 IEEE.This paper deal with a proposed PM motor driving system consist of PWM inverter with voltage booster to apply to wireless power transfer system for automated guided vehicle (AGV). This system would provide advantage that it makes to drive a PM motor and charge a battery at high efficiency against conventional system using low voltage battery because DC link voltage controlled by voltage booster at more high voltage. In addition, the voltage booster takes two roles such as DC link voltage control and battery current control. Therefore, circuit configuration can be simplified. Furthermore, the effectiveness of using SiC-MOSFET for the proposed system is suggested by evaluating efficiency of the prototype inverter by experiment. As above the investigation, it was cleared that the effectiveness of proposed PM motor driving system add the function of wireless power transfer for AGV.

DOI： 10.1109/ICEMS.2015.7385378

Scopus

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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）

© 2016 The Institiute of Electrical Engineers of Japan.In this paper, a driving method for an interior permanent magnet(IPM) motor is proposed; this method increases the system efficiency in the constant power region. In the driving method, the PWM inverter with a voltage booster system allows the use of both flux weakening control(FWO) and DC link voltage control(DVC) to drive an IPM motor at high speed. The authors investigate how a combination of FWC and DVCis suitable for the system. First, a simulation model is introduced. This model allows the calculation of the system efficiency and each part of the system losses in the voltage booster, inverter, and IPM motor. Furthermore, the system efficiency is calculated using the simulation model, and the simulation results are discussed when the ratio between the FWC and the DVC is changed. The IPM motor drive method is expected to help achievement of high efficiency by adjusting the ratio between the two control methods in the constant power region.

DOI： 10.1541/ieejias.136.17

Scopus

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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）

In this paper, improving method of system efficiency in constant power region for interior permanent magnet (IPM) motor driven using pulse width modulation (PWM) inverter with voltage booster is examined. Proposed control method can adjust the ratio of flux weakening control and DC link voltage control. An effectiveness of proposed control is investigated by experiment. Furthermore, improvement of the system efficiency by using silicon-carbide metal-oxide-semiconductor field-effect transistor (SiC-MOSFET) instead of conventional insulated gate bipolar transistor (IGBT) is evaluated. Finally effectiveness of proposed control on different type motors such as "a small current and high voltage type motor" and "a large current and low voltage type motor" is clarified. The proposed control method can provide benefit to improve the system efficiency for IPM motor drive system in constant power region.

DOI： 10.12792/jjiiae.004.02.04

CiNii Article

その他リンク： http://ci.nii.ac.jp/naid/130005415022

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）

© 2015 IEEE.In recent years, the introduction of contactless power transfer (CPT) system is required to automated guided vehicle (AGV) used in a factory. This paper deals with development of prototype contactless power transfer system for applying to AGV using both experiment and simulation. It is found that the developed prototype contactless power transfer system allows 1 kW power transfer in more than 68% of power transfer efficiency at 20 mm gap. Furthermore, an attempt is made to optimize the CPT by changing the core shape of the coils. As a result, combination of T-T shape cores made of ferrite core allows transmission of more power than T-E combination cores. These results suggest that the T-T shape cores contribute to further miniaturization of CPT system and larger capacity than previous CPT system using T-E combination cores.

DOI： 10.1109/PEDS.2015.7203455

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）

© 2015 IEEE.This paper deals with the gas pressure and temperature dependence of partial discharge inception voltage (PDIV) of a developed gas-insulated power module as a high temperature and high voltage package. Increasing the gas pressure and temperature in the developed power module increases and decreases PDIV, respectively. Furthermore, the result of decreasing PDIV with increasing temperature is discussed by taking PD light emission image and simulating electrical field around the contact between a springs electrode and Si3N4 dielectric chip which simulates SiC-SBD.

DOI： 10.1109/PEDS.2015.7203518

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）

© 2015 IEEE.This paper deals with investigation on electrical characteristics of both conventional Si-IGBT and next generation power semiconductor device SiC-MOSFET for high efficiency inverter of contactless power transfer system. This system has an issue that the power conversion efficiency is lower than that of conventional charging system using a plug. Since a proto type contactless power transfer system that we evaluated before adopted Si-IGBT, higher power conversion efficiency has been required. Thus, an attempt is made to improve the inverter efficiency using SiC-MOSFET. The performance of Si-IGBT and SiC-MOSFET are evaluated by conducting a switching test and experiment of static characteristics. Furthermore, inverter loss is calculated and discussed using experimental results of Si-IGBT and SiC-MOSFET. As a result, the inverter efficiency is found to increase by 0.48% using SiC-MOSFET. Additionally, it is suggested that ringing of the voltage and current should be suppressed when SiC-MOSFET is applied to an inverter for high frequency application like a contactless power transfer system.

DOI： 10.1109/PEDS.2015.7203536

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）

In this paper, authors investigate calculation method of losses in system which consists of interior permanent magnet (IPM) motor and PWM inverter with voltage booster. This system has two driving methods for motor in high speed region. One is DC link voltage Control. The other is flux weakening control. However, it is not cleared how combination of these two control methods is suitable for this system. It is necessary to quantitatively estimate parts of system losses in voltage booster, inverter and IPM motor, because total efficiency of system is decided by parts of system losses. So, the simulation model, which is capable of calculating parts of system losses to find suitable driving method for IPM motor using combination of the two control methods, is introduced and simulation results are discussed. © 2014 IEEE.

DOI： 10.1109/IPEC.2014.6869662

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）

The purpose of our work is to develop a power module using gas insulation and bonding-less interconnections to avoid the reliability issues known to current packaging technology. This paper deals with the temperature dependence of partial discharge inception voltage (PDIV) of a developed module up to 300 °C. In addition, an attempt is achieved to confirm half-wave rectifying operation up to 300 °C using SiCSchottky barrier diodes (SiC-SBD). From these results, the PDs were not detected up to 1500 V and 300 °C, proving its ability to be used in high temperature applications. © 2014 The Institute of Electrical Engineers, Japan.

DOI： 10.1109/ISEIM.2014.6870809

Scopus

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記述言語：日本語   掲載種別：研究論文（学術雑誌）

An interior permanent magnet (IPM) motor drive system which has regenerating capability augmented by electric double-layer capacitors (EDLCs) is proposed. In the proposed system, EDLCs are arranged in series with batteries so that a lesser number of the EDLCs and batteries will be required. The proposed system has two bi-directional voltage boosters: one is for both the batteries and EDLCs to control the dc-link voltage of a PWM inverter and the other is for only the EDLCs and is used to control the energy flow from and to the EDLCs. In this paper, a strategy to control the energy flow to and from the EDLCs is explained and its effectiveness is confirmed by simulation and experimental results. Furthermore, the efficiencies of the voltage booster, inverter, PM motor, and whole system are measured for the system with the basic configuration, i.e., which consists of only one bi-directional voltage booster and PWM inverter. Then, the steady-state characteristics are determined. Finally, the efficiency of the voltage boosters in the proposed system is determined, and the advantage of the proposed PM motor drive system is discussed. © 2011 The Institute of Electrical Engineers of Japan.

DOI： 10.1541/ieejias.131.671

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）

日本   東京   2009年11月15日  -  2009年11月18日

DOI： 10.1109/ICEMS.2009.5382975

その他リンク： http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5382975&abstractAccess=no&userType=inst

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   名古屋   2007年04月02日  -  2007年04月05日

DOI： 10.1109/PCCON.2007.372983

その他リンク： http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4239173&abstractAccess=no&userType=inst

対象： 大学生,　大学院生,　社会人・一般

種別：その他

主催：九州パワーアカデミー
役割：見学先の検討，見学先との日程調整およびバスの手配，当日の参加者への対応
会場：九州電力 豊前蓄電池変電所
　　　トヨタ自動車九州 宮田工場

対象： 大学生,　大学院生,　社会人・一般

種別：セミナー・ワークショップ

主催：九州パワーアカデミー
役割：講師の日程調整，開催場所の確保，配布資料準備。
　　　当日の受付および各講師の応対
会場：博多バスターミナル貸ホール
講師：田島大輔先生（福岡工業大学）
　　　鈴木淳氏（西日本プラント工業）
　　　石田和仁氏（九州電力）
　　　松本康宏氏（九電みらいエナジー）

対象： 大学生,　大学院生,　社会人・一般

種別：その他

主催：九州パワーアカデミー
役割：見学先の検討，見学先との日程調整およびバスの手配，当日の参加者への対応
会場：安川電機行橋事業所
　　　三菱電機パワーデバイス製作所

対象： 大学生,　大学院生,　社会人・一般

種別：セミナー・ワークショップ

主催：九州パワーアカデミー
役割：講師の日程調整，開催場所の確保，配布資料準備。
　　　当日の受付および各講師の応対
会場：北九州国際会議場
講師：田島大輔先生（福岡工業大学）
　　　鈴木淳氏（西日本プラント工業）
　　　石田和仁氏（九州電力）
　　　松本康宏氏（九電みらいエナジー）

対象： 大学生,　大学院生

種別：その他

主催：大学間連携共同教育プログラム
役割：教育プログラム委員の運営
　　　・オムニバス講義の企画・運営
　　　・合宿授業へのアドバイザとしての参加等