A Starting Protection Circuit of Low-Voltage and High-Power Motor

摘要

#$%^&*AU2015101527A420151126.pdf#####Title: A Starting Protection Circuit of Low-Voltage and High-Power Motor Abstract The invention discloses a starting protection circuit of a low-voltage and high-power motor, which comprises a micro-processing unit, a starting resistance control unit, a motor drive unit and a current detection unit, wherein the starting resistance control unit is used for limiting the starting current of a motor, and the micro-processing unit is connected with the motor through the motor drive unit, controls the rotating speed of the motor by adjusting the duty cycle input by the motor drive unit and controls the maximum current of the motor circuit according to detection signals of the current detection unit. The invention combines the advantages of soft start and series-resistance start and has rapid response and high reliability. '4. - t Moto)r drive Unit PUDr'ive cipltl Motor ..........._ dr i.... ]. urren .................-