Mathematical Current Derivation for Acoustic Noise Reduction in Switched Reluctance Motors Reviewed International journal

El-Faouri F.S., Cai Y., Fujii Y., Chiba A.

IEEE Transactions on Industry Applications   60 ( 1 )   388 - 399   2024.01

Comparison of Electromagnetic and Vibration Performances of Dual Three-Phase and Multiphase SPM Motors Reviewed International journal

Minegishi H., Fujii Y., Chiba A.

2024 27th International Conference on Electrical Machines and Systems Icems 2024   2804 - 2809   2024.01

Voltage Disturbance Compensation for Thrust Suspension Using Zero-Sequence Current in 5-Axis Actively Controlled Bearingless Motor Reviewed International journal

Fujii Y., Tanaka K., Chiba A., Tagami K., Sakuragi T., Tonari T., Irino Y.

2024 IEEE Energy Conversion Congress and Exposition Ecce 2024 Proceedings   5639 - 5644   2024.01

Proposal of 2-DOF Actively Controlled Consequent-Pole-Type Bearingless Single-Phase Motor Using Zero-Sequence Current Reviewed International journal

Tanaka K., Fujii Y., Chiba A.

2024 27th International Conference on Electrical Machines and Systems Icems 2024   2648 - 2653   2024.01

Development of a Bearingless PM Motor with Axial Magnetic Suspension Using Zero-Sequence Current Reviewed International journal

Fujii Y., Matsuda K., Tanaka K.

2024 27th International Conference on Electrical Machines and Systems Icems 2024   3628 - 3632   2024.01

Design and Optimization of Different Integrated Bearingless Motor Topologies for Magnetic-Geared Motors Reviewed

Kumashiro A., Fujii Y., Chiba A., Gruber W., Jungmayr G.

Ieej Journal of Industry Applications   13 ( 4 )   364 - 371   2024.01

Proposal of a One-DOF Actively Controlled Bearingless Motor Using Zero-Sequence Current Reviewed International journal

Y. Fujii

The 18th International Symposium on Magnetic Bearings (ISMB)   2023.08

Vibration and Acoustic Noise Reduction in Switched Reluctance Motor by Selective Radial Force Harmonics Reduction Reviewed International journal

Wiguna C.A., Cai Y., Lilian L.L.S.S., Furqani J., Fujii Y., Kiyota K., Chiba A.

IEEE Open Journal of Industry Applications   4   23 - 34   2023.01

Torque Density Improvement of a Low-Speed High-Torque Swirling Actuator Driven by Electromagnetic Radial Force With Integrated Mechanical Gears Reviewed International journal

Chen L., Fujii Y., Chiba A.

IEEE Open Journal of Industry Applications   4   11 - 22   2023.01

Inverter-less Thrust Magnetic Suspension Using Zero-Sequence Current in a 5-DOF Controlled Bearingless Motor Reviewed International journal

Fujii Y., Fang Y., Minegishi H., Chiba A.

2023 IEEE Energy Conversion Congress and Exposition Ecce 2023   4602 - 4607   2023.01

Experimental Verification of Passive Axial Electrodynamic Suspension in a Bearingless Motor Reviewed International journal

Rubio G.C., Komal V.C.H., Fujii Y., Chiba A.

IEEE Open Journal of Industry Applications   4   49 - 59   2023.01

Estimation of Magnetic Suspension Loss and Efficiency in a 30 000 r/min One-Axis Actively Positioned Single-Drive Bearingless Motor Reviewed

Srichiangsa T., Sugimoto H., Fujii Y., Kiyota K., Chiba A.

Ieej Journal of Industry Applications   12 ( 3 )   295 - 302   2023.01

Electromagnetic Force Estimation by Using Strain Gauges in Permanent Magnet Motors Reviewed International journal

Cai Y., El-Faouri F.S., Chiba A., Fujii Y., Kiyota K.

2023 IEEE International Electric Machines and Drives Conference Iemdc 2023   2023.01

Comparison of Acoustic Noise and Vibration in Ball-Bearing-Supported Motors and One-Axis Actively Positioned Single-Drive Bearingless Motor With Two Radial Permanent-Magnet Passive Magnetic Bearings Reviewed International journal

Srichiangsa T., Gunda S.N., Sugimoto H., Fujii Y., Kiyota K., Asama J., Chiba A.

IEEE Open Journal of Industry Applications   4   35 - 48   2023.01

Analytical Radial-Force Sum Flattening of Switched Reluctance Motors Considering Current RMS Reviewed International journal

El-Faouri F.S., Cai Y., Chiba A., Fujii Y.

2023 IEEE International Electric Machines and Drives Conference Iemdc 2023   2023.01

Acoustic Noise Reduction of Surface Permanent Magnet Motor by Injection of Third and Ninth Harmonics into the Zero-Sequence Current Reviewed International journal

Minegishi H., Fujii Y., Chiba A.

2023 26th International Conference on Electrical Machines and Systems Icems 2023   4779 - 4784   2023.01

Acoustic Noise Reduction and Radial-Force Sum Flattening of Switched Reluctance Motors by Analytical Force Shaping Reviewed International journal

El-Faouri F.S., Cai Y., Chiba A., Fujii Y.

2023 IEEE Energy Conversion Congress and Exposition Ecce 2023   4446 - 4450   2023.01

Reduced Axial Length Pole-Specific Rotor for Bearingless Induction Machines Reviewed International journal

Chen J., Johnson M.W., Farhan A., Wang Z., Fujii Y., Severson E.L.

IEEE Transactions on Energy Conversion   37 ( 4 )   2285 - 2297   2022.12

Enhanced Torque Density of a Novel One-Axis Actively Positioned Single-Drive Bearingless Motor Reviewed International journal

Srichiangsa T., Oe R., Sugimoto H., Fujii Y., Kiyota K., Chiba A.

2022 IEEE Energy Conversion Congress and Exposition Ecce 2022   2022.01

Verifying the Calculation Approach for Radial Suspension Force based on the Airgap Flux Density for SPM, Consequent-Pole, and Bearingless AC Homopolar Motors Reviewed

Noguchi T., Sugimoto H., Fujii Y., Chiba A.

IEEJ Transactions on Industry Applications   142 ( 7 )   506 - 515   2022.01

Reduction of Torque Ripple and Radial Force Harmonics in Consequent-Pole Permanent Magnet Motor for Electric Power Steering Applications Reviewed International journal

Tanaka Y., Minegishi H., Fujii Y., Chiba A.

2022 International Conference on Electrical Machines and Systems Icems 2022   2022.01

Reduction of Stator Vibration Acceleration Using One-Axis Actively Positioned Single-Drive Bearingless Motor Reviewed International journal

Srichiangsa T., Sugimoto H., Fujii Y., Kiyota K., Chiba A.

2022 International Conference on Electrical Machines and Systems Icems 2022   2022.01

Radial Force Harmonics Reduction of IPM Motor by Injection of Zero-Sequence Harmonic Current Reviewed International journal

Fujii Y., Tanaka Y., Chiba A.

2022 International Symposium on Power Electronics Electrical Drives Automation and Motion Speedam 2022   35 - 40   2022.01

Principle and Analysis of Radial-Force-Based Swirling Actuator for Low-Speed High-Torque Applications Reviewed International journal

Chen L., Thabuis A., Fujii Y., Chiba A., Nagano M., Nakamura K.

IEEE Transactions on Industry Applications   58 ( 2 )   1963 - 1975   2022.01

Novel Axial-Gap Bearingless PM Motor with Full-Passive Magnetic Suspension by Diamagnetic Disk Reviewed International journal

Ozawa Y., Fujii Y., Chiba A., Suzuki H.

2022 International Conference on Electrical Machines and Systems Icems 2022   2022.01

Mathematical Derivation of Current Reference for Radial-Force Sum Flattening in Switched Reluctance Motors Reviewed International journal

El-Faouri F.S., Cai Y., Fujii Y., Chiba A.

2022 IEEE Energy Conversion Congress and Exposition Ecce 2022   2022.01

Estimation of Magnetic Suspension Loss in a 30000 r/Min One-Axis Actively Positioned Single-Drive Bearingless Motor Reviewed International journal

Srichiangsa T., Sugimoto H., Fujii Y., Kiyota K., Chiba A.

2022 International Power Electronics Conference IPEC Himeji 2022 Ecce Asia   401 - 406   2022.01

Estimation of Electromagnetic Force Using Strain Gauges Attached to Iron Cores Reviewed International journal

Cai Y., Wiguna C.A., Fujii Y., Kiyota K., Sugimoto H., Chiba A.

IEEE Transactions on Industry Applications   58 ( 6 )   7143 - 7152   2022.01

Summary of a Bearingless Motor with Passive Electrodynamic Axial Suspension Reviewed International journal

G. Rubio , Y. Fujii , A. Chiba

The 17th International Symposium on Magnetic Bearings (ISMB)   2021.08

Optimal Design of the Bearingless Induction Motor Reviewed International journal

Chen J., Fujii Y., Johnson M.W., Farhan A., Severson E.L.

IEEE Transactions on Industry Applications   57 ( 2 )   1375 - 1388   2021.03

A Bearingless Motor with Passive Electrodynamic Suspension in Axial Direction Reviewed International journal

Rubio G.C., Fujii Y., Chiba A.

IEEE Transactions on Industry Applications   57 ( 6 )   6812 - 6822   2021.01

Voltage Sensorless Control of Split Capacitor for Three-Phase Four-Wire Motor System with Zero-Sequence Suspension Winding Reviewed International journal

Fujii Y., Asama J., Chiba A.

IEEE Transactions on Industry Applications   57 ( 6 )   6823 - 6832   2021.01

Requirements for Full Passive Suspension on a Bearingless Motor with Electrodynamic Axial Stabilization and Radial Permanent Magnet Bearings Reviewed International journal

Rubio G.C., Fujii Y., Chiba A.

2021 IEEE Energy Conversion Congress and Exposition Ecce 2021 Proceedings   3936 - 3942   2021.01

Principles and Test Result of Novel Full Passive Magnetic Levitation Motor with Diamagnetic Disk Reviewed International journal

Ozawa Y., Fujii Y., Chiba A., Sugimoto H., Suzuki H., Bleuler H.

2021 IEEE Energy Conversion Congress and Exposition Ecce 2021 Proceedings   3943 - 3948   2021.01

Design, Development, and Experimental Results of a 30 000-R/Min One-Axis Actively Positioned Single-Drive Bearingless Motor Reviewed International journal

Srichiangsa T., Sugimoto H., Fujii Y., Chiba A.

IEEE Transactions on Industry Applications   57 ( 6 )   6783 - 6791   2021.01

Analysis and Experimental Comparison of Acoustic Noise of Three Switched Reluctance Motors Made of Conventional Steel, High Silicon Steel, and Amorphous Iron Reviewed International journal

Sobue H., Chiba A., Cai Y., Kiyota K., Fujii Y., Senda K., Yoshizaki S.

IEEE Transactions on Industry Applications   57 ( 6 )   5907 - 5915   2021.01

A Novel Combined Winding and Test Result of a 20-Pole/24-Slot Consequent-Pole Bearingless Motor with Parallel Motor Winding Reviewed International journal

Noguchi T., Sugimoto H., Fujii Y., Chiba A.

IEEE Transactions on Industry Applications   57 ( 6 )   6880 - 6891   2021.01

三相四線式モータ駆動システムにおけるダイオード整流を用いた零相負荷の直流電流制御 Reviewed

藤井勇介 , 朝間淳一 , 千葉明 , 藤田英明

日本機械学会論文集   86 ( 890 )   2020.10

Positioning accuracy improvement for a magnetically levitated system using zero-sequence current of a permanent magnet motor Reviewed

Fujii Y., Asama J., Oiwa T., Chiba A.

IEEJ Transactions on Industry Applications   139 ( 3 )   322 - 329   2019.01

Balance Control of Split Capacitor Potential for Magnetically Levitated Motor System Using Zero-Phase Current Reviewed International journal

2018.05

Novel control method for magnetic suspension and motor drive with one three-phase voltage source inverter using zero-phase current Reviewed

Junichi ASAMA , Yusuke FUJII , Takaaki OIWA , Akira CHIBA

2 ( 4 )   2015.07

Realization of Magnetic Suspension and Motor Operation with One Three-phase Voltage Source Inverter Using a Zero-Phase Current Reviewed International journal

J. Asama , Y. Fujii , M. Fukuyo , T. Oiwa

14th International Symposium on Magnetic Bearings (ISMB)   2014.08

ヤングエンジニアポスターコンペティション（YPC）優秀発表賞

平成27年電気学会産業応用部門大会   零相負荷を考慮した磁気浮上形PMモータの電圧方程式の導出   2015.09

藤井勇介

2015 Young Engineer Competition Award

IEEE Industry Applications Society Japan Chapter   2015.09

藤井勇介

弱め界磁制御可能な三相インバータ1台で駆動する1軸制御形ベアリングレスモータの開発

2023.02 - 2024.03

研究助成  

永久磁石形モータにおける3次高調波電流制御による円環0次モードの振動低減

2022.04 - 2023.03

令和3年度科学技術研究助成（若手）  

磁気浮上モータの高出力化と小型簡素化を両立する基盤技術の構築と開発

2021.03 - 2023.02

研究助成  

埋込永久磁石形モータのステータコアに働く電磁加振力を低減可能な零相電流重畳制御の構築と実機実証

2021.02 - 2022.03

研究助成