Fujiwara Koji

フジワラコウジ | Fujiwara Koji

Affiliation and department：
Job title： Professor

Research field (1)： Electrical power engineering

Research theme for competitive and other funds (22)：

2020 - 2023 磁気ヒステリシスを定量化した,加速器用電磁石の高速かつ高精度な制御方法の研究
2017 - 2021 Development of physical and phenomenological models of stress-dependent vector magnetic properties of core materials for electric machins
2014 - 2017 Study on a multi-physics model of magnetic properties of iron-core material taking into account mechanical stress
2008 - 2011 RESEARCH FOR INTERNATIONAL STANDARD ON MEASUREMENT METHOD OF MAGNETIC PROPERTIES BY MEANS OF A SINGLE SHEET TESTER EQUIPPED WITH H-COIL
2003 - 2006 Research work of reconfigurable millimeter wave antenna

2002 - 2004 STUDY ON MAGNETIC FIELD ANALYSIS FOR DEVELOPING HIGHLY EFFICIENCY MOTORS CONSIDERING RESIDUAL STRESS AND ROTATING FIELD

2001 - 2003 Vector Magnetic Properties Oriented to Magnetic Field Analysis

1999 - 2000 ADVANCED METHOD FOR ANALYZING MAGNETIC FIELD AND APPLICATION

1997 - 1998 超低周波から商用周波帯域における磁性材料の磁気特性測定法の高精度化に関する研究

1997 - 1998 Analysis of Iron Loss in Magnetic Material using Time-Periodic Finite Element Method Taking Account of Hysteresis and Eddy Current

1997 - 1998 Development of Design Method of Energy Efficient Machines

1995 - 1996 Development of Methods for Measuring Magnetic Characteristics of Strong Magnet

1994 - 1995 Investigation of Quenching Phenomena at the Joint between AC Superconducting Cable and Normal Conducting Plate and Optimization of Joint

1994 - 1995 Development of Single Sheet Tester for Measuring Magnetic Characteristics of Amorphous Magnetic Metals

1994 - 1995 Development of Methods for Analyzing Eddy Currents in Moving Conductors and Verification

1994 - 1995 Efficient Use of Steels and Development of Low Loss Machines

1992 - 1993 Development of 3-D Numerical Analysis and Applications

1989 - 1991 Verification of Softwares for 3-D Eddy Current Analysis

1989 - 1990 Design of Optimal Structure of AC Superconducting Wire Using 3-D Finite Element Method

1989 - 1989 アモルファス金属の磁気特性測定洋標準試験器の試作

1987 - 1988 Development of Program of 3-D Finite Element Method for Analyzing Magnetic Fields in Electrical Machines Excited from Voltage Sources

1987 - 1988 Development of Nd-Fe-B Magnet Generator for Small Hydraulic Power Station

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Papers (160)：

Botao Liu, Yasuhito Takahashi, Koji Fujiwara, Satoshi Imamori. Stray Loss Evaluation of Power Transformers Using Simplified Air-Core Model With Tank and Frame. IEEE Transactions on Magnetics. 2023. 59. 11
Yasuhito Takahashi, Koji Fujiwara, Kengo Sugahara, Tetsuji Matsuo. Model Order Reduction of Cage Induction Motor With Skewed Rotor Slots Using Multiport Cauer Ladder Network Method. IEEE Transactions on Magnetics. 2023. 59. 5. 1-4
Tetsuji Matsuo, Yasuhito Takahashi, Koji Fujiwara. Anisotropic Vector Play Model and its Application in Magnetization Analysis. IEEE Transactions on Magnetics. 2023. 59. 5. 1-4
Yasuhito Takahashi, Koji Fujiwara, Takeshi Iwashita. Parallel-in-Space-and-Time Finite-Element Method for Time-Periodic Magnetic Field Problems with Hysteresis. IEEE Transactions on Magnetics. 2023
Yuki Ohnishi, Yasuhito Takahashi, Koji Fujiwara, Kazuyuki Hidaka, Hiroshi Morita. Modelling of <i>I-V</i> Characteristics for Crystalline Silicon Photovoltaic Modules based on a Simplified Equivalent Circuit and a Temperature Correction. IEEJ Transactions on Power and Energy. 2022. 142. 9. 461-471

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MISC (161)：

高橋康人, 貝森弘行, 藤原耕二, 岩下武史. Comparison of Localized and Additive Schwarz Preconditioning in Parallel Finite-element Analysis of Electric Machines Using Domain Decomposition Method. 電気学会全国大会講演論文集(CD-ROM). 2023. 2023
高橋康人, 藤原耕二, 岩下武史. Magnetic Field Analysis of Electric Machines Taking Account of Hysteretic Property Using Parallel-in-Space-and-Time Finite-Element Method. 電気学会研究会資料(Web). 2023. SA-23-018-032/RM-23-018-032
高橋康人, 阿波根明, 飛田美和, 松尾哲司, 藤原耕二. Circuit Simulation of a FEM-parameterized Plant Model for a Permanent Magnet Synchronous Motor Based on Semi-implicit Time Integration Method. 電気学会研究会資料(Web). 2023. SA-23-069-080/RM-23-068-079
後藤峻平, 高橋康人, 藤原耕二, 松下真琴, 竹内活徳. Stray Loss Evaluation of a Ductile Cast Iron Frame in a Permanent Magnet Synchronous Motor. 電気学会研究会資料(Web). 2023. MD-23-118-137/RM-23-093-112
井口達馬, 髙橋康人, 藤原耕二. 平角線コイルベンチマークモデルの銅損評価に関する検討-Copper Loss Evaluation of Flat Wire Coil Benchmark Models-静止器/回転機合同研究会・電磁界数値計算技術とその応用. 電気学会研究会資料. SA / 電気学会静止器研究会 [編]. 2022. 2022. 18-32. 67-72

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Education (2)：

1982 - 1984 Okayama University Graduate School of Engineering Department of Electrical Engineering
1978 - 1982 Okayama University Faculty of Engineering Department of Electrical Engineering

Professional career (2)：

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