2022 Fiscal Year Final Research Report
Drive system combined with variable magnetic force magnet and magnetic resonance coupled wireless power transfer
Project/Area Number |
21K14137
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 21010:Power engineering-related
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Research Institution | The University of Tokyo |
Principal Investigator |
Shimizu Osamu 東京大学, 大学院新領域創成科学研究科, 特任講師 (90606287)
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Project Period (FY) |
2021-04-01 – 2023-03-31
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Keywords | モータ / 無線電力伝送 / 電気自動車 / 高効率化 |
Outline of Final Research Achievements |
Variable magnetic flux rotor is effective in improving the drive efficiency of motors in both the high-torque/low-speed and low-torque/high-speed areas. Therefore, I conducted a basic study, prototyping, and evaluation of a drive system that changes the magnetic force of the variable flux magnets by wireless power transfer to the exciting coils of the variable flux magnets located in the rotor. For verification of the principle, the increase/decrease of magnet flux by power transmission using a C shape core that simulates a rotor and a variable flux magnet is verified. Moreover, a prototype motor equipped with a variable flux magnet, a magnetizing coil, and a wireless power transmission system was implemented for the rotor, and changes in motor characteristics due to magnetization increase/decrease were verified on the motor bench.
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Free Research Field |
電気自動車
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Academic Significance and Societal Importance of the Research Achievements |
本研究ではモータの高トルク・低回転数、低トルク・高回転数領域双方での駆動高効率の向上を可能にする、可変磁力磁石と界磁巻線、さらにワイヤレス電力伝送を組み合わせた今までにないモータを提案し、実証することにより、当該システムの持つ利点や課題を明らかにした。また学術的には周波数制御によって過渡的にMOSFETに流れる大電流を抑制しつつ、定常的に負荷に流れる電流を増大することができることを明らかにした。
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