发明名称 |
Method for reducing cogging torque effects of an electrical permanent magnet machine |
摘要 |
A method for reducing cogging torque effects of an electrical permanent magnet machine includes running an "a" test and a "b" test with different cogging compensation signals. A first value is calculated by multiplying a complex cogging amplitude of the compensation signal applied for the "a" test with a complex amplitude of a vibration signal resulting from cogging torque of the "b" test. A second value is calculated by multiplying a complex cogging amplitude of the compensation signal applied for the "b" test with a complex amplitude of the vibration signal resulting from cogging torque of the "a" test. A desired complex cogging compensation amplitude is calculated by dividing the difference between the first and second values by a difference between the complex amplitudes of the vibration signals resulting from the "b" test and the "a" test. A cogging compensation torque is applied to the machine based on the desired complex cogging compensation amplitude.
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申请公布号 |
US8541968(B2) |
申请公布日期 |
2013.09.24 |
申请号 |
US20090934182 |
申请日期 |
2009.03.16 |
申请人 |
KYLLINGSTAD AAGE;NATIONAL OILWELL VARCO NORWAY AS |
发明人 |
KYLLINGSTAD AAGE |
分类号 |
H02P6/10;H02P6/20 |
主分类号 |
H02P6/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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