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Affiliation |
Faculty of Engineering, Division of Intelligent Systems Engineering |
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Job Title |
Professor |
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Related SDGs |
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AKATSU Kan
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ORCID
Degree 【 display / non-display 】
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Doctor of Engineering - Yokohama National University
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Master of Engineering - Yokohama National University
Campus Career 【 display / non-display 】
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2019.10
Duty Yokohama National UniversityFaculty of Engineering Division of Intelligent Systems Engineering Professor
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2023.4
Concurrently Yokohama National UniversityInstitute of Advanced Sciences Professor
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2019.10
Concurrently Yokohama National UniversityGraduate school of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Professor
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2019.10
Concurrently Yokohama National UniversityGraduate School of Engineering Department o Physics, Electrical and Computer Engineering Professor
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2019.10
Concurrently Yokohama National UniversityCollege of Engineering Science Department of Mathematics, Physics, Electrical Engineering and Computer Science Professor
Books 【 display / non-display 】
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カラー徹底図解 パワーエレクトロニクス
赤津観（ Role： Supervisor (editorial)）
ナツメ社 （ ISBN:978-4-8163-7246-9 ）
Total pages：320 Language：Japanese Book type：General book, introductory book for general audience
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電気機器学の基礎理論
藤本康孝, 赤津観（ Role： Joint author）
コロナ社 （ ISBN:978-4-339-00936-1 ）
Total pages：242 Responsible for pages：2～4章 Language：Japanese Book type：Scholarly book
Papers 【 display / non-display 】
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Performance Comparison of High-Speed Motors for Electric Vehicle
Aiso, K.; Akatsu, K
World Electric Vehicle 13 ( 57 ) 2022.3 [Reviewed]
Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Single Work
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Loss Reduction Method Based on Single-Pulse Mode in V/f Control for Switched Reluctance Motors
Kato Hirotaka, Kumagai Takahiro, Watanabe Hiroki, Itoh Jun-ichi, Akatsu Kan
IEEJ Journal of Industry Applications 14 ( 6 ) 1101 - 1109 2025.11 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：一般社団法人 電気学会 Joint Work
<p>This paper proposes a loss reduction method based on the single-pulse mode with a freewheeling period in V/f control for switched reluctance motors (SRMs), specifically targeting the high-speed region beyond the base speed. The proposed method is implemented using the pulse-width modulation (PWM) module of a general-purpose microcontroller, enabling an operation that closely mimics traditional single-pulse behavior while minimizing switching events. This method results in steeper rising and falling edges of the current waveform, contributing to reduced losses. Compared to conventional V/f control based on sinusoidal voltage drive, the proposed method shortens the conduction period in the negative torque region, thereby decreasing copper loss. Additionally, by introducing an appropriate freewheeling period, the voltage-time integral (i.e., flux) is reduced, leading to a reduction in iron loss. The proposed method consists of three main components: (A) a parameter determination strategy to enable single-pulse mode within the V/f control, (B) an efficient control technique tailored for freewheeling operation, (C) a method for suppressing beat phenomena caused by conduction angle errors in discrete-time control systems. Experimental results demonstrate that the proposed approach reduces copper loss by 21.4% and iron loss by 5.7% under base-speed and rated-torque condition, confirming its effectiveness.</p>
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EV Motor System With Magnetic Gear Satisfying High‐Power Density and High Torque Density
Kohei Aiso, Kan Akatsu, Yasuaki Aoyama
Electrical Engineering in Japan 2025.1
Language：The in addition, foreign language Publishing type：Research paper (scientific journal) Publisher：Wiley Joint Work
<jats:title>ABSTRACT</jats:title><jats:p>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.</jats:p>
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EV Motor System with Magnetic Gear Satisfying High Power Density and High Torque Density
Aiso Kohei, Akatsu Kan, Aoyama Yasuaki
IEEJ Transactions on Industry Applications 144 ( 7 ) 557 - 567 2024.7 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electrical Engineers of Japan Joint Work
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Mitigating Vibration from Dynamic Eccentricity in Motors: A Triple Three-Phase Winding Approach
Yang Kan, Akatsu Kan, Okazaki Kodai, Miyama Yoshihiro
IEEJ Transactions on Industry Applications 144 ( 4 ) 248 - 256 2024.4 [Reviewed]
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Institute of Electrical Engineers of Japan Joint Work
Charge of on-campus class subject 【 display / non-display 】
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2025 Energy and Control Practice
Graduate school of Engineering Science
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2025 Advanced controll and energy system demonstration F
Graduate school of Engineering Science
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2025 Advanced controll and energy system demonstration S
Graduate school of Engineering Science
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2025 Advanced controll and energy system design F
Graduate school of Engineering Science
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2025 Advanced controll and energy system design S
Graduate school of Engineering Science