Multi-loop power drive method and device for motor

The invention relates to a multi-loop power drive method and a device for motor, and the drive device comprises a motor phase current detection circuit, used for detecting the direct and indirect parameter off the motor phase current; a motor drive circuit used for reliably driving the motor load; a motor drive feedback system composed of multiple closed-loops, each closed-loop drive is composed of the time constant setting circuit and the gain unit; one end of the motor phase current detection circuit is connected to the ground while the other end is respectively connected to the detection end and the motor drive circuit of the feedback system. The multi-loop power drive method and the device for motor have the advantages as follows: at the complex environment parameter change, the optimization combination of the motor power drive feedback loop time constant and gain coefficient can guarantee stable and even work for the motor for a long time and the short period running response speed. The motor phase current is detected; the combination of the feedback loop time constant and gain coefficient is automatically set for guaranteeing balance power output and reliable motor work.