Speed governing drive circuit and fan motor of motor

The utility model provides a speed governing drive circuit and fan motor of motor, wherein, the speed governing drive circuit of motor, include: electric machine coil, the alternating current signal generator is connected to electric machine coil for provide alternating current signal to electric machine coil, switch drive module with electric machine coil and alternating current signal generator series connection, can form driving circuit, pulse generator is equipped with the driving interface of first driving interface of group and second group, and the first driving interface of group is connected to switch drive module's drive end, the afterflow module, with electric machine coil parallel connection, the drive end of afterflow module is connected to the driving interface of second group, and wherein, the first driving interface's of group drive signal and the 2nd driving interface's drive signal are complemental pulse signal. Through the utility model discloses technical scheme has reduced the shake of mo