发明授权
US5475290A Device for protecting washing machine motor including brushless motor
against overcurrent
失效
用于保护洗衣机电动机的装置,包括无刷电动机以防止过电流
- 专利标题: Device for protecting washing machine motor including brushless motor against overcurrent
- 专利标题(中): 用于保护洗衣机电动机的装置,包括无刷电动机以防止过电流
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申请号: US252776申请日: 1994-06-02
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公开(公告)号: US5475290A公开(公告)日: 1995-12-12
- 发明人: Kazutoshi Tani , Fumihiro Imamura
- 申请人: Kazutoshi Tani , Fumihiro Imamura
- 申请人地址: JPX Kawasaki
- 专利权人: Kabushiki Kaisha Toshiba
- 当前专利权人: Kabushiki Kaisha Toshiba
- 当前专利权人地址: JPX Kawasaki
- 优先权: JPX2-226914 19900828
- 主分类号: D06F33/02
- IPC分类号: D06F33/02 ; D06F37/30 ; H02H1/04 ; H02H7/085 ; H02P3/00
摘要:
A washing machine includes a brushless motor, a position sensing element for sensing a rotational position of a rotor of the motor, a motor drive control circuit composed of an inverter main circuit for driving the motor and an inverter control circuit for controlling the inverter main circuit based on a signal generated by the position sensing element, a current detector for detecting a current flowing in the inverter main circuit, an overcurrent determining circuit generating an overcurrent detection signal when the current detected by the current detector exceeds a reference value, and an abnormal condition detector for generating an abnormal condition detection signal when the number of times of output of the overcurrent detection signal generated by the overcurrent determining circuit reaches a predetermined value.
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