发明授权
US06222751B1 Driver circuit for a polyphase DC motor with minimized voltage spikes
有权
具有最小电压尖峰的多相直流电机的驱动电路
- 专利标题: Driver circuit for a polyphase DC motor with minimized voltage spikes
- 专利标题(中): 具有最小电压尖峰的多相直流电机的驱动电路
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申请号: US09571354申请日: 2000-05-15
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公开(公告)号: US06222751B1公开(公告)日: 2001-04-24
- 发明人: Salvatore Portaluri , Alessandro Savo , Maurizio Nessi , Luigi Eugenio Garbelli , Giorgio Sciacca
- 申请人: Salvatore Portaluri , Alessandro Savo , Maurizio Nessi , Luigi Eugenio Garbelli , Giorgio Sciacca
- 主分类号: H02M75387
- IPC分类号: H02M75387
摘要:
A driver circuit includes a half-bridge output stage including two transistors with a common terminal for connection as the driver output to a coil of a DC motor. Two amplifiers drive the transistors in the push-pull operation and two capacitors are connected between the driver output and one input of a respective amplifier to form feedback loops for controlling the output slew-rate. Two current generators are selectively connected to an input of either of the amplifiers through respective pairs of switches. A commutation sequencer turns on and off the switches according to a commutation program. Comparators are connected to the drive output for detecting predetermined output voltage conditions and providing the commutation sequencer with signals for conditioning the commutation program as a function of the detected voltage conditions.
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