Systems and methods for reduction of motor jitter while driving an electric motor

摘要

An apparatus for driving a motor comprises a drive signal generation circuit configured to produce pulses on a pulse-width modulated drive signal in response to a control signal. A detection circuit is coupled to receive a commutation signal from the motor to monitor the speed of the motor. A control signal generation circuit is configured to dynamically generate the control signal so that a frequency of pulse-width modulated drive signal corresponds with the duration of the phase of the motor, so as to reduce the occurrence of an incomplete pulse on the drive signal. Methods for driving a motor are also disclosed.

主权项

1. A method of driving a motor comprising:
generating a drive signal to a motor for controlling power to the motor; generating a control signal to control a frequency of the drive signal; monitoring a speed of the motor; adjusting the control signal, based on the speed of the motor, to set the frequency of the drive signal to a value associated with a duration of a phase of the motor, so as to reduce the occurrence of an incomplete pulse on the drive signal; and generating pulses on the drive signal by toggling the drive signal when the control signal crosses a threshold.