| Project/Area Number |
12650288
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Kagoshima University |
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Principal Investigator |
SHINAHARA Katsuji Kagoshima University, Faculty of Engineering, Professor, 工学部, 教授 (80112358)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAMOTO Kichiro Kagoshima University, Faculty of Engineering, Research Associate, 工学部, 助手 (70220457)
IIMORI Kenichi Kagoshima University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (00284901)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2001: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2000: ¥2,400,000 (Direct Cost: ¥2,400,000)
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| Keywords | without speed sensor / vector control / induction motor / low speed range / 速度・磁束オブザーバ |
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| Research Abstract |
In the conventional MRAS method, the value of velocity estimation is the output of the PI controller that received its input signal from speed adaptive controller. As the value of velocity estimation includes time delay, the system responses are worse and the instability occurs in the low speed range.
In the proposed method, the speed and flux observers are composed of the current model flux observer and voltage model flux observer. The value of new velocity estimation does not include time delay theoretically. So, the system responses are improved.
In practice, the instability of rotor speed are caused by voltage detection error. The feedback of the out of current model flux observer to the input of voltage model flux observer is effective for stabilization in this case.
Lastly, the simulated results show that the system responses are good and the instability does not occur in the low speed range.
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