发明申请
- 专利标题: ZERO-CROSSING DETECTION CIRCUIT AND COMMUTATION DEVICE USING THE ZERO-CROSSING DETECTION CIRCUIT
- 专利标题(中): 使用零交叉检测电路的零交叉检测电路和传感器件
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申请号: US13232086申请日: 2011-09-14
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公开(公告)号: US20120326647A1公开(公告)日: 2012-12-27
- 发明人: Wei-Hsu Chang , Pei-Cheng Huang , Hao-Yu Chang , Yen-Shin Lai , Kuo-Chung Lee , Jo-Yu Wang , Yu-Kuang Wu , Chih-Chang Chen , Shiue-Shr Jiang , Jen-Hung Chi
- 申请人: Wei-Hsu Chang , Pei-Cheng Huang , Hao-Yu Chang , Yen-Shin Lai , Kuo-Chung Lee , Jo-Yu Wang , Yu-Kuang Wu , Chih-Chang Chen , Shiue-Shr Jiang , Jen-Hung Chi
- 申请人地址: TW Hsinchu County
- 专利权人: RICHTEK TECHNOLOGY CORP
- 当前专利权人: RICHTEK TECHNOLOGY CORP
- 当前专利权人地址: TW Hsinchu County
- 优先权: TW100121663 20110621
- 主分类号: H02P6/18
- IPC分类号: H02P6/18
摘要:
A zero-crossing detection circuit and a commutation device using the zero-crossing detection circuit are provided. The zero-crossing detection circuit is adapted into a three-phase brushless DC (direct current) motor with first to third coils. One terminal of each of the first to third coils is electrically coupled together with each other. The detection circuit comprises a first selection circuit, a second selection circuit and a comparator. The first selection circuit and the second selection circuit are both electrically coupled to another terminals of the first to third coils, to obtain first to third terminal voltages, and output one of the first to third terminal voltages according to a selection signal. The comparator is configured for comparing an output of the first selection circuit and an output of the second selection circuit, to output a comparing result.