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Graduate School of Science and Engineering
Electrical and Electronic Engineering

Electrical Machinery & Apparatus Laboratory

Staff

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Koji FUJIWARA
[Professor]
Acceptable course
Master's degree course
Doctoral degree course
Telephone : +81-774-65-6375
kofujiwa@mail.doshisha.ac.jp
Office : YE-316
Database of Researchers
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Yasuhito TAKAHASHI
[Associate Professor]
Acceptable course
Master's degree course
Doctoral degree course×
Telephone : +81-774-65-6266
yatakaha@mail.doshisha.ac.jp
Office : YE-317
Database of Researchers

Research Topics

  • Analysis and design of electric machines such as transformers, inductors, actuators, generators and motors
  • Development of numerical methods for magnetic field analyses and modelling methods for magnetic hysteresis and anisotropy
  • Measurement of magnetic properties of power magnetic materials under various excitation conditions

Research Contents

We investigate high-efficiency technologies of electric machines and electronic circuits, enhancement of their control methods, efficient use of renewable energy. The common concept of our research projects is “saving energy”.

1. Performance analysis and design optimization of electric machines
Magnetic field analyses are widely used in designing electric machines. We develop numerical techniques based on finite element methods and practical modelling methods for magnetic properties, and carry out magnetic field analyses of various electric machines to achieve their optimal design.

2. Measurement and modelling of magnetic properties of soft magnetic materials
In order to make the best use of electrical steel sheets in designing high-performance electrical machines, it is indispensable to deeply understand their magnetic properties. We investigate magnetic measurement methods for soft magnetic materials under alternating/rotating, sinusoidal/non-sinusoidal magnetic flux conditions from low- to high-frequency region.

Keywords

  • Electric machine
  • Magnetic field analysis
  • Finite element method
  • Material modeling
  • Standard measurement method for magnetic property
  • Single sheet tester
  • Electrical steel sheet
  • Soft magnetic composites
  • Magnetic properties
  • Magnetostriction
  • Permanent magnet synchronous motor
  • Induction motor
  • Synchronous reluctance motor
  • Inductor