| Project/Area Number |
07455117
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
電力工学・電気機器工学
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
FUKAO Tadashi Tokyo Institute of Technology, Professor, 工学部, 教授 (10016545)
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| Co-Investigator(Kenkyū-buntansha) |
CHIBA Akira Science University of Tokyo, Lecturer, 理工学部, 講師 (30207287)
MICHIOKA Chikara Tokyo Institute of Technology, Research Associate, 工学部, 助手 (40262282)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥7,400,000 (Direct Cost: ¥7,400,000)
Fiscal Year 1996: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1995: ¥4,900,000 (Direct Cost: ¥4,900,000)
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| Keywords | homopolar type motor / bearingless motor / synchronous motor / magnetic levitation / salient pole motors / high speed motor |
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| Research Abstract |
The homopolar inductor type motors have two rotors, which can be magnetized with the field windings of the stator, then are well suited for mechanical contactless bearingless motors which the investigators have proposed for high speed rotating machines.
In this research, the investigators propose homopolar type bearingless machines. The focus is placed on the development of the design, the fundamental characteristics, and the control methods, and obtained the final achievements summarized as follows :
1) Homo-polar type bearingless motors and the controllers of the motors and the radial rotor position controllers are manufactured.
2) Radial forces are calculated, then the fact that radial forces can be produced with DC current of the radial force windings was pointed out and confirmed by 2-axis levitation tests with rotation.
3) The pole numbers of the radial force windings must be 2. In order not to produce radial force ripples, and interference of torque component fluxes, the least pole numbers of the motor windings are 4, which are the same as the plot-type machines.
4) Field weakening methods were developed. The fact that adjustment of field fluxes makes larger output power was pointed out. It was confirmed by the field weakening operation up to 12000rpm in loaded conditions by using the manufactured test system with load machines and torque meters.
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