发明名称 |
Rotational direction detecting apparatus for a three-phase brushless DC motor |
摘要 |
A region judging circuit judges an electric angle region of a three-phase brushless DC motor based on an output signal of a resolver. A latch timing output circuit determines an optimum latch timing. A driving direction judging circuit judges a rotational direction of the motor based on a comparison in largeness between a pair of phase currents. A latch circuit latches a judgement result of the driving direction judging circuit at the latch timing designated by the latch timing output circuit and retains the judgement result until the next latch timing comes.
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申请公布号 |
US6995538(B2) |
申请公布日期 |
2006.02.07 |
申请号 |
US20030356478 |
申请日期 |
2003.02.03 |
申请人 |
DENSO CORPORATION |
发明人 |
HAYASHI YOSHITAKA |
分类号 |
B62D5/04;G05B1/06;H02P6/00;H02P6/16 |
主分类号 |
B62D5/04 |
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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