研究者詳細 - 道木　慎二

講演・口頭発表等 - 道木　慎二

分割表示 278 件中 61 - 80 件目／全件表示 >>

Examination of Magnetization Curve Model for Torque Ripple Reduction of IPMSMs to Compensate for Magnetic Characteristics 国際会議

H. Akatsuka, M. Hasegawa, S. Doki

2020年11月24日 IEEE

The Improvement of Initial Rotor Position Estimation Method with Extended-EMF Available at Overall Speed Range by Exciting with Speed and Signal Injection 国際会議

Takamasa Kozakura, Takumi Nimura, Shinji Doki

ICEMS 2020 2020年11月24日 IEEE

Torque Ripple Reduction of IPMSM Considering Compensation of Nonlinearities of Magnetic Characteristics 国際会議

Hiroyasu Akatsuka, Masaru Hasegawa, Shinji Doki

IECON2020 2020年10月20日 IEEE

Position Sensorless Control Method by Using Redefined Extended Electromotive Force for All-Speed-Range Drive of IPMSM and its Evaluation on Electric Vehicle 国際会議

Kentaro Kitamura, Takumi Nimura, Shinji Doki

ISIE2020 2020年6月17日 IEEE

Variable Switching Frequency Control for Efficiency Improvement of Motor Drive System by Using GaN Three Phase Inverter 国際会議

Ohta, K; Kanazawa, Y; Akatuka, H; Hori, S; Doki, S; Tadano, H; Shiozaki, K

2020 IEEE INTERNATIONAL CONFERENCE ON INDUSTRIAL TECHNOLOGY (ICIT) 2020年 Proceedings of the IEEE International Conference on Industrial Technology

開催年月日： 2020年

記述言語：英語会議種別：口頭発表（一般）

This paper aims to propose a new traction motor control system for electric vehicles (EVs). EVs are required to have higher energy efficiency in motor control systems for cruising longer distance. However, motor control systems, which are generally equipped with Si-IGBT inverters, have limits of the energy efficiency. Therefore, new inverters, which use wide bandgap (WBG) semiconductor devices such as Gallium Nitride (GaN), are expected to be a solution to improve the energy efficiency. Having less energy loss in conducting and switching operation than Si-IGBT inverters, the GaN inverters can increase the switching frequency. In addition, the reduction of harmonic loss of the motors will enable us to improve the energy efficiencies of the entire motor control system. Although previous researches have demonstrated the performance of various inverters, the experiments demonstrated only inverters of small capacities that are insufficient to be applied in traction motor control of EVs. Then, our research group are challenging to increase the power of GaN inverters and to realize their practical application to compact EVs. In this research, the switching frequency of the GaN inverter was dynamically changed to verify the higher energy efficiency of the motor control system. The results of the experiment have shown that the total energy efficiency can be improved by up to about 1.5% and the total loss can be reduced by up to about 10%.

DOI： 10.1109/ICIT45562.2020.9067266

Scopus

A Novel Decoupling Control Scheme for Dual Three Phase Motors 国際会議

Wang, S; Imai, K; Doki, S

2020 23RD INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS) 2020年

The improvement of initial rotor position estimation method with Extended-EMF available at overall speed range by exciting with speed and signal injection 国際会議

Kozakura, T; Nimura, T; Doki, S

2020 23RD INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS) 2020年

Servo Brake Control based on Finite Control Set-Model Predictive Control with a Voltage Smoother 国際共著国際会議

Kawai, H; Cordier, J; Kennel, R; Doki, S

2020 IEEE 2ND GLOBAL POWER, ENERGY AND COMMUNICATION CONFERENCE (IEEE GPECOM2020) 2020年

Examination of Magnetization Curve Model for Torque Ripple Reduction of IPMSMs to Compensate for Magnetic Characteristics. 国際会議

Akatsuka, H; Hasegawa, M; Doki, S

2020 23RD INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS) 2020年

Examination of Current Sensor Fail-Safe of PMSM current control system which using current and position state estimation techniques 国際会議

Hori, S; Doki, S

2020 23RD INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS) 2020年

Control Method that Reduces the High Harmonic in Overmodulation Drive of Dual Winding Motor under Condition of Voltage Supplies Unbalance 国際会議

Suzuki, T; Doki, S

2020 23RD INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS) 2020年

A Study on the Implementation of Vector Control System Using the Model Base Parallelization Tool on Multi-Core Processor 国際会議

Kim, J; Kato, S; Honda, S; Edahiro, M; Doki, S

2020 23RD INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS) 2020年

Three-dimensional Deformation Control System for Fabric Actuator 国際会議

Yamaguchi, H; Funabora, Y; Doki, S; Doki, K

2020 IEEE/SICE INTERNATIONAL SYMPOSIUM ON SYSTEM INTEGRATION (SII) 2020年

Position Sensorless Estimation for Surface Permanent Magnet Synchronous Motor Using Eddy Current 国際会議

Kato, S; Tomita, M; Hasegawa, M; Doki, S

2020 23RD INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS) 2020年

Torque Ripple Reduction of IPMSM Considering Compensation of Nonlinearities of Magnetic Characteristics 国際会議

Akatsuka, H; Hasegawa, M; Doki, S

IECON 2020: THE 46TH ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY 2020年 IECON Proceedings (Industrial Electronics Conference)

開催年月日： 2020年

記述言語：英語会議種別：口頭発表（一般）

This paper proposes a torque ripple estimation and reduction of IPMSM with concentrated winding considering nonlinearity of magnetization characteristics. First, the proposed torque ripple estimation method which ignores nonlinearities such as magnetic saturation and cross-coupling is derived and some problems of this approach are presented. Then, the torque ripple estimation method considering nonlinearity of magnetization characteristics is proposed, in which this approach is based on simple approximations of the magnetization curve. After that, a torque ripple reduction is proposed, which are based on the adaptive identification of the equivalent torque coefficient. Finally, the performance of the proposed method is experimentally evaluated to show the feasibility of the proposed method.

DOI： 10.1109/iecon43393.2020.9254577

Scopus

Performance Evaluation of Position Sensorless Control By using Extended Electromotive Force Including Overmodulation Region on Electric Vehicle 国際会議

Kitamura, K; Doki, S

2020 23RD INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS) 2020年

Position Sensorless Control Method by Using Redefined Extended Electromotive Force for All-Speed-Range Drive of IPMSM and its Evaluation on Electric Vehicle 国際会議

Kitamura, K; Takumi, N; Doki, S

2020 IEEE 29TH INTERNATIONAL SYMPOSIUM ON INDUSTRIAL ELECTRONICS (ISIE) 2020年 IEEE International Symposium on Industrial Electronics

開催年月日： 2020年

記述言語：英語会議種別：口頭発表（一般）

This paper presents evaluation of position sen-sorless control method by redefined Extended Electromotive Force (EEMFω+h) for All-speed-range on Electric Vehicle(EV). Pposition sensorless control is one of the significant research concern for IPMSM in terms of lowering cost, saving installation space and improvement of reliability. A previous research that redefined EEMF for all-speed-range drive and proposed a method to estimate (EEMFω+h) excited by signal injection and speed to realize all speed estimation has been conducted. In order to expand application examples, an EV is remodeled and implemented this method, and finally this method is evaluated in various running experiments in this paper.

DOI： 10.1109/isie45063.2020.9152459

Scopus

過変調領域まで動作可能な永久磁石同期モータのベクトル制御系招待有り

道木慎二

JSAE SYMPOSIUM 車載用パワーエレクトロニクスの最新技術 2019年10月

A Current Harmonic Minimum PWM for Three-Level Converters Aiming at the Low-Frequency Fluctuation Minimum of Neutral-Point Potential 国際会議

Guan, B; Doki, S

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 2019年5月 IEEE Transactions on Industrial Electronics

開催年月日： 2019年5月

記述言語：英語会議種別：口頭発表（一般）

When the selected harmonic elimination pulsewidth modulation (SHEPWM) is adopted to three-level neutral-point-clamped converters to reduce the switching frequency, the neutral-point potential (NPP) problem becomes more severe compared with other modulations. It is because there is no degree of freedom for SHEPWM to control the NPP. SHEPWM realizes a better harmonic performance by calculating the switching angles offline based on harmonic requirements. Since it is harsh to solve the angles online, we cannot change the angles to control the NPP. Aiming at the low-frequency NPP fluctuation minimum, a novel current harmonic minimum method based on the optimal third-order/ninth-order harmonic is proposed in this paper. The optimal third-order/ninth-order harmonic is derived based on the relationships among the third-order/ninth-order harmonic and the NPP. They can be utilized to realize the low-frequency NPP fluctuation minimum without changing any switching angle online. Moreover, some comparisons, such as the solution ranges, weighted total harmonic distortion, the initial value of iteration calculation, show that the proposed method has a good output performance. Finally, the experimental results are given to verify the validity of the proposed method.

DOI： 10.1109/TIE.2018.2851995

Scopus

High-performance V/f control of PMSM using state feedback control based on <i>n</i>-<i>t</i> coordinate system

Matsuki, Y; Doki, S

ELECTRICAL ENGINEERING IN JAPAN 2019年3月 Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)

開催年月日： 2019年3月

記述言語：英語会議種別：口頭発表（一般）

This paper proposes a new V/f control method for permanent magnetic synchronous motors (PMSMs) without a position sensor. The proposed method uses state feedback control based on an n–t coordinate system, and controls rotational speed and the voltage amplitude. The t-axis is a tangent line of a constant voltage ellipse, and the n-axis is a normal line of the ellipse. The t-axis current is utilized to place the poles of the transfer function at the desired position at low-speed and high-speed conditions. The effectiveness of the proposed method was verified by simulation and experimental results.

DOI： 10.1002/eej.23198

Scopus

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講演・口頭発表等 - 道木 慎二

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講演・口頭発表等 - 道木　慎二