发明授权
- 专利标题: Control circuit for brushless electric motor
- 专利标题(中): 无刷电动机控制电路
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申请号: US181913申请日: 1988-04-15
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公开(公告)号: US4833374A公开(公告)日: 1989-05-23
- 发明人: Tooru Watanabe , Minoru Shimizu
- 申请人: Tooru Watanabe , Minoru Shimizu
- 申请人地址: JPX Tokyo
- 专利权人: Tamagawa Seiki Kabushiki Kaisha
- 当前专利权人: Tamagawa Seiki Kabushiki Kaisha
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX62-131839 19870529
- 主分类号: H02P6/22
- IPC分类号: H02P6/22 ; H02P6/00
摘要:
A control circuit for a brushless electric motor includes a pulse width modulator for applying drive signals to a gate drive circuit according to from a current amplifier, multi-phase drive coils connected to the gate drive circuit through an inverter circuit, a comparator connected to the current amplifier, a flip-flop for applying output signals from the comparator and drive signals form the pulse width modulator, and a circuit portion for applying signals for switching the direction of rotation from the flip-flop to the gate drive circuit. A preceding signal for switching the direction of rotation is maintained in the flip-flop until the dead zone of the pulse width modulating circuit is elapsed and a new signal for switching the direction of rotation is generated in synchronism with a pulse signal produced by the pulse width modulating circuit so as to be supplied to the gate drive circuit.
公开/授权文献
- US5394593A Slide-fastener coupling element and method of making the same 公开/授权日:1995-03-07