研究者詳細 - 赤津　観

論文 - 赤津　観

件数 265 件

Performance Comparison of High-Speed Motors for Electric Vehicle

Aiso, K.; Akatsu, K

World Electric Vehicle 13 ( 57 ) 2022年3月 [査読有り]

DOI

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）単著

磁気ギアを用いたEV用モータシステムの高出力・高トルク密度化

相曽浩平, 赤津観, 青山康明

電気学会論文誌Ｄ（産業応用部門誌） 144 ( 7 ) 557 - 567 2024年7月 [査読有り]

DOI CiNii Research

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会共著

Technical innovations for the downsizing of motor systems are necessary to realize energy savings and roomy and comfortable car interior space in electric vehicles. In this paper, a novel motor drive system with multiple high speed motors and a Magnetic Multiple Spur Gear (MMSG) is proposed for electric vehicles. Furthermore, the factors leading to a high power density and high torque density in an MMSG system are clarified.

三群三相永久磁石同期モータの動的偏芯に起因する振動の抑制手法

楊侃, 赤津観, 岡崎広大, 深山義浩

電気学会論文誌Ｄ（産業応用部門誌） 144 ( 4 ) 248 - 256 2024年4月 [査読有り]

DOI CiNii Research

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会共著

The dynamic eccentricity of rotors is a significant obstacle in their manufacturing process. This obstacle causes an imbalanced electromagnetic force and generates unexpected vibrations and acoustic noise. In this study, the effects of dynamic eccentricity on the temporal and spatial harmonic distributions of gap magnetic flux density and electromagnetic force are investigated, and the cause of the vibration is identified. Moreover, a compensation method is proposed to suppress the vibrations due to dynamic eccentricity by using a multi-sector and multi-phase motor. The compensation current is obtained by optimization. The effectiveness of the proposed method is verified by finite element analysis and experiments.

次世代電動車主機用モータとその制御

赤津観

計測と制御 62 ( 11 ) 679 - 684 2023年11月 [査読有り]

DOI CiNii Research

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：公益社団法人計測自動制御学会単著

2重3相永久磁石同期モータの高調波電流低減のための巻線係数を用いた設計法検討

吉田叡人, 赤津観

電気学会論文誌Ｄ（産業応用部門誌） 143 ( 8 ) 579 - 589 2023年8月 [査読有り]

DOI CiNii Research

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会共著

Dual three-phase motors offer numerous advantages, including the elimination of 6th-order torque ripple. However, they have the drawback of generating large harmonic currents when driven because of their small inductance for specific harmonics. In this study, inductance, which depends on the winding structure and harmonics, is formulated using the winding factor in order to reduce harmonic currents through winding design. The theoretical values of the formulated inductance are in good agreement with the FEA values. In addition, the magnitude of the harmonic currents generated during drive are quantitatively evaluated using these inductance values. Conventionally, when the winding factor for the 5th and 7th spatial harmonics is small, the 5th and 7th harmonics of back EMF can be reduced. However, dual three-phase motors with small winding factor for 5th and 7th spatial harmonics have the disadvantage of having very small inductance for specific harmonics, resulting in large harmonic currents.

13.56MHzを用いたワイヤレス電力伝送用大容量カプラの設計

笹原衣純, 赤津観

電気学会論文誌Ｄ（産業応用部門誌） 143 ( 7 ) 547 - 552 2023年7月 [査読有り]

DOI CiNii Research

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会共著

Over the years, wireless power transfer has been increasing attention. With the development of high-speed switching devices, research on wireless power transfer system using megahertz bands has been increasing. The size and weight of the coupler can be reduced using megahertz bands. However, the loss of the coupler owing to the skin effect and the proximity effect must be considered in the high frequency range. Therefore, in this paper, a two-layer open spiral coupler using copper foil for the coil is proposed. Moreover, it is experimentally confirmed that the proposed two-layer open spiral coupler using copper foil achieved high-efficiency high-power transmission using high frequency 13.56MHz at a transmission distance of 300mm.

Imbalanced Force Suppression Due to Static Eccentricity by using Triple Three-phase Winding Motor

Yang Kan, Akatsu Kan, Okazaki Kodai, Miyama Yoshihiro

IEEJ Journal of Industry Applications 12 ( 4 ) 763 - 772 2023年7月 [査読有り]

DOI CiNii Research

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会共著

Permanent magnet synchronous machines (PMSMs) are widely used in a variety of applications. The static eccentricity of the rotor is a common fault in the fabrication process. These faults cause imbalanced electromagnetic force and exert unexpected vibration and acoustic noise during the design process. In the worst case, it causes bearing or motor failure. This research investigates the impact of this fault on the temporal and spatial harmonic distribution of gap flux density and electromagnetic force. Moreover, a compensation method has been proposed to suppress imbalanced force due to static eccentricity by using a triple three-phase winding motor. By controlling the three inverters independently, the winding current of each group can be controlled. Therefore, the gap flux density and electromagnetic force in each group can be brought into a desired state. Therefore, the imbalanced electromagnetic force can be restored using this system. In this paper, the effectiveness of the proposed method is verified by Finite Element Analysis (FEA) and experiment.

Study of Winding Structure to Reduce Harmonic Currents in Dual 3-phase Motor

Akito Yoshida and Kan Akatsu

World Electr. Veh. J. 14 ( 4 ) 2023年4月 [査読有り]

DOI

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）単著

その他リンク： https://www.mdpi.com/2032-6653/14/4/100

Vibration Suppression of a Specific Harmonic Component by Teeth Flux Density Control Using Multi-Phase MATRIX Motor

Kan Yang, Kan Akatsu

IEEJ Journal of Industry Applications 12 ( 2 ) 194 - 203 2023年3月 [査読有り]

DOI CiNii Research

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会単著

In recent years, progress in power semiconductor switching devices has created more additional advantages that can be realized using multi-phase inverter-fed motors. The authors propose a MATRIX motor to realize electric motors with higher functionalities than conventional electric motors. Since the MATRIX motor is driven by H-bride inverters connected with each phase winding, it has a high degree of freedom in control. Moreover, these inverters can change their connections to different phase coils to realize a wide operating range. The voltage equation of each mode can be expressed using the transformation matrix when the winding connection is changed. Therefore, we call the proposed motor MATRIX motor. In addition, since motors are being applied to various applications that operate within proximity of people, further quietness of the motor is required. In this paper, we propose a method to suppress vibration caused by a specific harmonic order radial direction electromagnetic force via teeth flux density control using the MATRIX motor. The specific order radial force and vibration are suppressed by utilizing two features of the MATRIX motor. One is a high degree of freedom of current control owing to multi-phase drive and the other is local flux density observation. The effectiveness of the proposed method was clarified using experimental results.

Real-time Dynamic Eccentricity Detection by Analyzing Harmonic Components of No-load Line-line Voltages in Multi-three-phase PMSMs

Kodai Okazaki, Kan Yang, Kan Akatsu

IEEJ Journal of Industry Applications 12 ( 3 ) 409 - 417 2023年1月 [査読有り]

DOI CiNii Research

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会単著

Permanent magnet synchronous motors (PMSMs) are widely utilized for many purposes owing to their high efficiency. Such frequent applications require less noise and fewer vibrations. This work focuses on multi-three-phase PMSMs that can independently control the current among winding groups to suppress the vibrations caused by air gap imbalances, which must be detected for suppression control. The representative effects of air gap imbalance include static and dynamic eccentricities. Dynamic eccentricity varies the air gap length in time; therefore, the instantaneous detection of the air gap length condition is necessary for suppression control. We propose a method that instantaneously detects dynamic eccentricity using the fundamental and fourth-order harmonic components of no-load line-line voltages, which are easily measurable in practical manufacturing processes. The proposed real-time detection method is applied to a finite element analysis (FEA) model with dynamic eccentricity, and confirm its detection ability is confirmed experimentally.

Study of Winding Structure to Reduce Harmonic Currents in Dual 3-phase Motor

81. Akito Yoshida and Kan Akatsu

World Electr. Veh. J. 14 ( 4 ) 2023年 [査読有り]

DOI

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）単著

表面磁石型永久磁石同期モータにおける高調波電流を考慮したモータ形状探索時間短縮法

綿引正倫, 赤津観

電気学会論文誌Ｄ（産業応用部門誌） 142 ( 11 ) 835 - 844 2022年11月 [査読有り]

DOI CiNii Research

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会単著

It is known that the harmonic current of a motor affects torque ripple. Therefore, to take into account the harmonic current in finite element analysis, the voltage input needs to be evaluated however, voltage input analysis is more time-consuming than current input analysis. In this paper, we propose a method to predict the harmonic current and torque ripple of the voltage input analysis of the sine wave by only using the result of the current input analysis of the sine wave in the surface permanent magnet synchronous motor.

IPEC2022 ECCE-Asia Himejiを終えて

赤津観

電気学会論文誌Ｄ（産業応用部門誌） 142 ( 11 ) NL11_1 - NL11_1 2022年11月 [査読有り]

DOI CiNii Research

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会単著

Real-time Dynamic Eccentricity Detection by Analyzing Harmonic Components of No-load Line-line Voltages on Multi-three-phase PMSMs

Kodai Okazaki, Kan Yang, Kan Akatsu

2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia) 2022年5月

DOI CiNii Research

記述言語：その他外国語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE 共著

Imbalanced Force Suppression Due to Static Eccentricity by Using Triple Three-phase Winding Motor

Kan Yang, Kan Akatsu, Kodai Okazaki, Yoshihiro Miyama

2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia) 2022年5月

DOI CiNii Research

記述言語：その他外国語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE 共著

A Novel In-Wheel Motor Drive System of Multiple High-Speed Motors Integrated with Magnetic Gear for Electric Vehicle

Kohei Aiso, Kan Akatsu, Yasuaki Aoyama

2022 International Power Electronics Conference (IPEC-Himeji 2022- ECCE Asia) 2022年5月

DOI CiNii Research

記述言語：その他外国語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE 共著

方向性電磁鋼板を用いたSRMの設計と実機特性

土屋柚樹, 赤津観

電気学会論文誌 D (産業応用部門誌) 42 ( 1 ) 1 - 8 2022年1月 [査読有り]

DOI CiNii Research

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会共著

The switched reluctance motor (SRM) has generated considerable attention because of its lack of magnets and lower cost structure compared to the permanent magnet synchronous motor (PMSM) structure. In addition, SRM can achieve high speed rotation because of its simple structure and high robustness. However, SRM has lower torque density than that of PMSM. To increase the torque density in SRM, a grain-oriented electrical steel sheet (GO) can be applied as the stator and rotor materials. The magnetic characteristics of GO fluctuate depending on the angle between the rolling direction and magnetic flux direction. In a previous research, it was confirmed that three kinds of torques are output when the stator and rotor materials use GO. In this paper, three kinds of torques are explained, and a design concept of an SRM using GO is proposed. In addition, the static and dynamic torque characteristics of the proposed SRM are verified by simulation and experiment.

Magnet Operating Point Estimation Using Flux Linkage Observer and Magnetic and Thermal Equivalent Circuit in PMSM

Minho Jang, Kan Akatsu

IEEJ Journal of Industry Applications 11 ( 1 ) 148 - 156 2022年1月 [査読有り]

DOI CiNii Research

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会共著

In this study, an effective combination of methods to estimate the magnet operating points in a permanent magnet synchronous motor (PMSM) is proposed. First, the magnet temperature estimation is compensated with the initial temperature and magnet loss based on the error between the estimated temperature obtained using the thermal equivalent circuit and the estimated temperature obtained using the flux observer. In addition, stator loss is compensated based on the error between the measured temperature and estimated temperature obtained using the thermal equivalent circuit. Then, the flux linkage observer is compensated with the d/q inductance value using the magnetic equivalent circuit. A method of estimating the magnetic flux density of a permanent magnet is designed to estimate the magnetic flux density of the motor using a magnetic equivalent circuit reflecting the value of the measured magnet temperature and magnetic flux density in the permanent magnet's B-H curve. Unlike the rotor temperature, the stator temperature can be easily measured, and the magnet operating point estimation can be designed as a more accurate and error-resistant estimation method. Furthermore, simulation and experimental verification demonstrate the effectiveness of the proposed method.

PMSMのトルクリップル抑制用高調波電流重畳指令値生成方法の検討

西尾太一, 山内亮佑, 金堂雅彦, 赤津観

電気学会論文誌Ｄ（産業応用部門誌） 141 ( 11 ) 848 - 855 2021年11月 [査読有り]

DOI CiNii Research

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会共著

Permanent-magnet synchronous motors (PMSMs) are used for traction application in electric vehicles (EVs) and hybrid electric vehicles (HEVs). However, PMSMs generate vibration and acoustic noise in the connected load due to torque ripple. Torque ripple reduction techniques require accurate modeling of torque ripple and estimation of motor parameters considering magnetic saturation and magnet temperature variation. Existing approaches that consider magnetic saturation and magnet temperature variation are complicated and difficult to realize. Therefore, this paper proposes a torque ripple expression which is regarded as complex vector behavior. It can easily determine the high harmonic current reference to reduce the torque ripple by geometrically expressing the torque ripple. Furthermore, the effect of the proposed method of torque ripple reduction was experimentally verified.

復活の狼煙をIPEC-Himeji 2022 ECCE-Asiaから！

赤津観

電気学会論文誌Ｄ（産業応用部門誌） 141 ( 9 ) NL9_1 - NL9_1 2021年9月

DOI CiNii Research

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会単著

Dual Three-Phase-Winding Permanent-Magnet Synchronous Motors: An Investigation of the Optimal Carrier Phase-Shift Angle

Yoshihiro Miyama, Kan Akatsu

IEEE Industry Applications Magazine 27 ( 6 ) 12 - 21 2021年8月 [査読有り]

DOI

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Detection Method of Static Eccentricity Using Third-order Harmonic Component of No-load Line-line Voltages on Three-group and Three-phase Permanent Magnet Synchronous Motors

Kodai Okazaki, Kan Akatsu, Kan Yang

2021 IEEE International Electric Machines & Drives Conference (IEMDC) 2021年5月

DOI CiNii Research

記述言語：その他外国語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE 共著

Advanced control method of 5-phase dual concentrated winding pmsm for inverter integrated in-wheel motor

Kan Akatsu, Keita Fukuda

World Electric Vehicle Journal 12 ( 2 ) 61-1 - 61-17 2021年4月 [査読有り]

DOI CiNii Research

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：MDPI AG 共著

<jats:p>This paper presents some techniques for driving novel 5 phase dual winding PMSM (Permanent Magnet Synchronous Motor) for the in-wheel motor. The motor realizes winding change over characteristics that can expand driving area from high-torque mode to high-speed mode due to the dual winding construction. However, the dual winding structure makes a high-current ripple due to high coupling between windings. The paper proposes some control methods to reduce the current ripple, including inverter career ripple. The paper also presents harmonics current injection, such as the 3rd harmonics current injection method, to reduce the torque ripple and generate higher torque.</jats:p>

Analysis and Design of Novel Structured High Torque Density Magnetic-Geared Permanent Magnet Machine

SOHEIL YOUSEFNEJAD, HOSSEIN HEYDARI, KAN AKATSU, JONG-SUK RO

IEEE Access 9 64574 - 64586 2021年4月 [査読有り]

DOI

記述言語：英語掲載種別：研究論文（学術雑誌）共著

これからの国際会議はどうなるか

赤津観

電気学会論文誌Ｄ（産業応用部門誌） 141 ( 3 ) NL3_1 - NL3_1 2021年3月

DOI CiNii Research

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会単著

第3次高調波電流制御を用いたオープン巻線構造PMSM の駆動手法検討

本田一成, 赤津観

電気学会論文誌Ｄ（産業応用部門誌） 141 ( 1 ) 39 - 45 2021年1月 [査読有り]

DOI CiNii Research

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会共著

Permanent magnet synchronous motors (PMSMs) are widely used as an automotive motor, and there has been a demand for their further technological advance. A harmonic current control method has been used as a controllable approach for realizing its low vibration of PMSMs. In addition, a dual inverter system has attracted attention as an automotive motor system considering its fault tolerant function. In this study, an open-winding structure PMSM driven by dual three-phase inverters, which share a DC bus source, is used for the proposed third harmonic current control. By using third harmonic current control, it is possible to reduce both the sixth order torque ripple component and the second order radial force. The performance of the third harmonic current control of the open-winding PMSM is verified through FEA and experimental results.

A Method to Suppress Second Harmonic Order Radial Force by Teeth Flux Density Control in Multi-phase MATRIX motor

Yang Kan, Akatsu Kan

2021 IEEE International Future Energy Electronics Conference (IFEEC) 2021年1月 [査読有り]

CiNii Research

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE (InstituteofElectricalandElectronics Engineers) 共著

In recent years, multi-phase inverter-fed motors that realize additional advantages have been actively studied because of developments of power semiconductor switching devices. The authors also have proposed a MATRIX motor driven by H-bride inverters connected with each phase winding individually for the purpose of realizing electric motors with high functionalities. In addition, since motors are being applied to various applications that is close to people, further quietness of motor is required. In this paper, a method is proposed that 2(nd) order radial direction electromagnetic force can be suppressed by teeth flux density control in the MATRIX motor. By utilizing high degree of freedom of current control owe to multi-phase drive and local flux density observation capability of the MATRIX motor, the 2(nd) order radial force on each tooth and vibration are suppressed. The effectiveness of the proposed method was clarified by simulation results.

Consideration of driving area expansion for Flux Switching Motor with Variable Flux Magnet

Ryosuke Minegishi, Kan Akatsu

2020 23rd International Conference on Electrical Machines and Systems (ICEMS) 2020年11月

DOI CiNii Research

記述言語：その他外国語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE 共著

Comparison between analysis and experimental result of iron loss in SRM

Takayuki Hara, Kan Akatsu

2020 23rd International Conference on Electrical Machines and Systems (ICEMS) 2020年11月

DOI CiNii Research

記述言語：その他外国語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE 共著

電動工具用自己冷却SRMの提案と実機特性

肥沼孝一, 赤津　観

電気学会論文誌D 140 ( 11 ) 826 - 833 2020年11月 [査読有り]

DOI CiNii Research

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会共著

Electric hand tools must be low cost and require minimal maintenance. To achieve these demands, a switched reluctance motor (SRM) is expected to be used as an electric hand tool motor as an alternative to a brushless DC Motor (BLDCM). The SRM is suitable for electric hand tools owing to its low manufacturing cost. However, the SRM has a disadvantage in that its torque density is lower than that of the BLDCM. Therefore, the SRM needs to add a higher current than the BLDCM to achieve the same output torque. Moreover, the winding temperature quickly increases owing to the large copper loss. To overcome this problem, this paper proposes a self-cooling SRM. The proposed SRM can realize the same output torque and the same volume as a BLDCM system including a fan. Additionally, the proposed SRM can slow the increase in winding temperature by increasing the motor volume and through the self-cooling effect. In this study, the performance of the prototype self-cooling SRM is verified through simulations and experiments.

The Study on Sensor Fault Detection and Algorithm Transition using Adaptive Threshold in Position Self-sensing Control for IPMSM

Dongwoo Lee, Kan Akatsu

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 2020年10月 [査読有り]

DOI

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE 共著

A 13.56 MHz Antenna Design With The Efficiency Improvement For The Wireless Power Transfer System

N. T. Cuong, N. K. Trung, K. Akatsu,

International Journal of Engineering Research and Technology 13 ( 7 ) 1735 - 1741 2020年7月 [査読有り]

記述言語：英語掲載種別：研究論文（学術雑誌）共著

A Novel Flux-Switching Magnetic Gear for High-Speed Motor Drive System

Kohei Aiso , Kan Akatsu , Yasuaki Aoyama

IEEE Transactions on Industrial Electronics 68 ( 6 ) 4727 - 4736 2020年4月 [査読有り]

DOI CiNii Research

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IEEE 共著

国際化はなぜ必要か？

赤津観

電気学会論文誌Ｄ（産業応用部門誌） 139 ( 10 ) NL10_1 - NL10_1 2019年

DOI

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会単著

その他リンク： https://ci.nii.ac.jp/naid/130007722415

A Novel Reluctance Magnetic Gear for High-Speed Motor

Aiso Kohei, Akatsu Kan, Aoyama Yasuaki

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS 55 ( 3 ) 2690 - 2699 2019年 [査読有り]

DOI Web of Science

記述言語：英語掲載種別：研究論文（学術雑誌）共著

Selection Method of Controller Gains for Position Sensorless Control of IPMSM Drives

Lee Dongwoo, Akatsu Kan

IEEJ Journal of Industry Applications 8 ( 4 ) 720 - 726 2019年 [査読有り]

DOI Web of Science

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会共著

Rotor position and speed in sensorless control based on back-electromotive force (back-EMF) estimation can be estimated from back-EMF estimator and rotor position estimator in an interior permanent magnet synchronous motor (IPMSM). Even if the rotor position and speed are correctly estimated by these estimators in the steady state, the performance of estimators in the transient state may be degraded by the gain design of estimators. This paper describes the design method of estimators and current controller to ensure stable sensorless control of IPMSM not only in the steady state but also in the transient state such as for torque or speed variation. The performance of our proposed method is verified through a simulation and experimental results.

その他リンク： https://ci.nii.ac.jp/naid/130007673048

可変磁力モータの着磁制御による高速領域電圧抑制手法及び車両のトルク脈動に関する考察

佐々木健介, Brent S. Gagas, 井上景介, 福重孝志, 加藤崇, 赤津観, Robert D. Lorenz

電気学会論文誌Ｄ（産業応用部門誌） 139 ( 6 ) 550 - 557 2019年 [査読有り]

DOI

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人電気学会共著

This paper discusses a magnetization state (MS) manipulation method at high speeds with low vehicle vibration for variable flux permanent magnet synchronous machines (VF-PMSMs). VF-PMSMs can achieve lower driving cycle losses compared to conventional PMSMs by changing the MS in the medium speed and medium torque range. To maximize this advantage for reducing driving cycle losses, the MS manipulation capability in this range, which requires higher voltage to change MS than that required in the low speed range, is critical. However, the capability has not been researched very well. In this paper, a MS manipulating method using a straight line stationary flux linkage trajectory (SLλsT) is investigated and evaluated. This method uses a straight line flux linkage trajectory in the stationary frame so that the DC bus voltage utilization is maximized while the flux linkage achieves the desired magnetizing point without demagnetization. This method was experimentally evaluated with EV-scale VF-PMSMs, and it was found to achieve full magnetization at a speed almost two times higher than the base speed. The effect of this method on vehicle vibration was studied via simulation using the experimental result and a simple vehicle model that emulates a vehicle powertrain for traction applications.

その他リンク： https://ci.nii.ac.jp/naid/130007657742

Study of High-speed SRM with Amorphous steel sheet for EV

Tomioka Taketo, Akatsu Kan

2019 22ND INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS 2019) 5515 - 5520 2019年 [査読有り]

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