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

Driver circuit for a polyphase DC motor with minimized voltage spikes
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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