Brushless dc motor with soft-starting of pwm signals

Details Brushless dc motor with soft-starting of pwm signals Brushless dc motor with soft-starting of pwm signals

H - Electricity

02

P

H02P 7/00 (2006.01) H02H 7/08 (2006.01) H02M 7/02 (2006.01)

Patent

CA 2698290

A DC motor is provided. The DC motor prevents rush or overload of current in the DC motor during and/or after power input irregularities to the DC motor. A control circuit of the DC motor is configured to control current provided to the DC motor. When power irregularities in the power input to the DC motor are detected by the control circuit, the control circuit stops generating PWM (Pulse Width Modulated) signals and stops the current provided to the DC motor. After the stoppage of PWM signals, the control circuit can perform a soft-start of the PWM signals when the power irregularities are no longer detected. The soft starting of the PWM signals generates gradual increase in current to the DC motor, thus, preventing sudden rush of current that cause malfunction of the DC motor.

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