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Controller and MCU chip for controlling 3-phase brushless DC motor
Controller and MCU chip for controlling 3-phase brushless DC motor
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机译:用于控制三相无刷直流电动机的控制器和MCU芯片
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摘要
The present invention discloses a 3-phase brushless DC motor controller, which comprises: a unit for generating a PWM signal; an ADC for converting a back electromotive force (BEMF) signal from an analog form into a digital form; a synchronization and extraction unit operating in synchronization in part with the PWM signal for extracting the digital BEMF signal to obtain a corresponding ZCP signal; and a unit for judging whether a commutation operation is to be performed according to a change of the corresponding ZCP signal. A wait instruction and a delay instruction help to accurately acquire the digital BEMF signal.
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