Details of a Researcher - TAJIMA Katsubumi

TAJIMA Katsubumi

写真a

Affiliation	Graduate School of Engineering Science Cooperative Major in Sustainable Engineering
Laboratory Phone number	+81-18-889-2333
Laboratory Fax number	+81-18-837-0406
Mail Address

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Research Interests 【 display / non-display 】

電気機器
磁気工学

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Graduating School 【 display / non-display 】

1983.04

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1987.03

Tohoku University Fuculty of Engineering Department of Electrical Engineering Graduated

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Graduate School 【 display / non-display 】

　

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1989.03

Tohoku University Graduate School, Division of Engineering Master's Course Completed

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Degree 【 display / non-display 】

Tohoku University - Doctor (Engineering)
Tohoku University - Master (Engineering)
Tohoku University - Bachelor (Engineering)

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Campus Career 【 display / non-display 】

2022.04

-

Now

Akita University Graduate School of Engineering Science Cooperative Major in Sustainable Engineering Professor
2016.04

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2022.03

Akita University Graduate School of Engineering Science Cooperative Major in Life Cycle Design Engineering Professor
2012.04

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2016.03

Akita University Professor
2010.05

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2012.03

Akita University Graduate School of Engineering and Resource Science Department of Electrical and Electronics Engineering Professor
2010.04

　

　

Akita University Department of Electrical and Electronic Engineering Associate Professor

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Academic Society Affiliations 【 display / non-display 】

1989.04

-

Now

Japan

IEEE

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Research Areas 【 display / non-display 】

Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Power engineering

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Research Achievements 【 display / non-display 】

◆Original paper【 display / non-display 】

Design and Analysis of Outer-Rotor PM Motor with Segmented rotor-shape for Utilizing Reluctance Torque

Sakurai S., Yoshida Y., Tajima K.

Journal of the Magnetics Society of Japan ( Journal of the Magnetics Society of Japan ) 49 ( 6 ) 104 - 109 2025.11 [Refereed]

Research paper (journal) Domestic Co-author

<p> Recently, the market scale of a drone has grown significantly. To utilize a drone more, the operating time needs to be extended. So, a drone motor should be lightweight and high power. However, the almost drone motor has a Surface permanent magnet, and improving torque is difficult because the outer-rotor has a low-degree design. Increasing torque, the Segment PM is adapted to the drone motor. It can use a reluctance torque with an outer-rotor type. However, the ratio of the reluctance torque is low and it is not enough from a result of the previous paper. So, improvement of the reluctance torque is desired. This paper presents a novel drone motor applied to Segment PM and investigated a ratio of reluctance torque by finite element method (FEM).</p>

DOI CiNii Research

Reduction of Torque Ripple for Outer-Rotor-Type Segment PM Motor with Ferrite Magnet

Sakurai S., Yoshida Y., Tajima K.

Transaction of the Magnetics Society of Japan Special Issues ( The Magnetics Society of Japan ) 9 ( 1 ) 66 - 71 2025.05 [Refereed]

Research paper (journal) Domestic Co-author

DOI CiNii Research

Development of Injection Molded IPMSM with Sm-Fe-N Bonded Magnets

Yoshida R., Yoshida Y., Uwano T., Yamamoto M., Tajima K.

Transaction of the Magnetics Society of Japan Special Issues ( The Magnetics Society of Japan ) 9 ( 1 ) 77 - 81 2025.05 [Refereed]

Research paper (journal) Domestic Co-author

DOI CiNii Research

Calculation for Output Characteristic of Motor Structure with Boost Reactor Function Based on RNA

Zhang L., Yoshida Y., Sakurai S., Handa N., Tajima K.

Transaction of the Magnetics Society of Japan Special Issues ( The Magnetics Society of Japan ) 8 ( 1 ) 52 - 56 2024.05 [Refereed]

Research paper (journal)

DOI CiNii Research

Study on High Torque IPMSM Using Sm-Fe-N Bonded Magnet

Takeda K., Yoshida Y., Yoshida R., Abe M., Tada S., Yamamoto M., Tajima K.

Transaction of the Magnetics Society of Japan Special Issues ( The Magnetics Society of Japan ) 8 ( 1 ) 62 - 66 2024.05 [Refereed]

Research paper (journal) Domestic Co-author

DOI CiNii Research

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◆Introduction and explanation【 display / non-display 】

Japan's First Commercial Offshore Wind Power Generation at Akita and Noshiro Ports

TAJIMA Katsubumi

The Journal of The Institute of Electrical Engineers of Japan ( The Institute of Electrical Engineers of Japan ) 145 ( 10 ) 604 - 607 2025.10

Introduction and explanation (scientific journal) Single author

DOI CiNii Research

Activities of the Magnetics Technical Committee and Aims of the Special Issue

TAJIMA Katsubumi

IEEJ Journal ( The Institute of Electrical Engineers of Japan ) 143 ( 11 ) 692 - 693 2023.11

Introduction and explanation (bulletin of university, research institution) Single author

DOI

Preface to Special Issue on "High-Efficiency and High-Functional Technologies for Energy Conversion System on Applied Magnetics"

Tajima Katsubumi

IEEJ Transactions on Fundamentals and Materials ( The Institute of Electrical Engineers of Japan ) 138 ( 12 ) 584 - 584 2018.12

Introduction and explanation (scientific journal) Single author

DOI

Recent Topics in Applied Magnetics Technology for High Efficiency Energy Conversion

Katsubumi Tajima

IEEJ Transactions on Fundamentals and Matrials ( The Institute of Electrocal Engineers of Japan ) 136 ( 1 ) 23 - 24 2016.01

Introduction and explanation (others) Single author

DOI

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◆International conference proceedings【 display / non-display 】

Study on Orientation and Magnetization Characteristics of Injection-Molded IPMSM Using Sm-Fe-N Bonded Magnets

Yoshida Y., Yoshida R., Sakurai S., Abe M., Tada S., Yamamoto M., Tajima K.

Conference Record IAS Annual Meeting IEEE Industry Applications Society ( Conference Record IAS Annual Meeting IEEE Industry Applications Society ) 2025.06 [Refereed]