Motor driving circuit and control method thereof

A motor driving circuit, comprising:

• a first driving signal output circuit, configured to generate a six-step square wave driving signal;
• and
• a second driving signal output circuit, configured to generate a space-vector driving signal,
• wherein the motor driving circuit is configured to selectively output the six-step square wave driving signal from the first driving signal output circuit or output the space-vector driving signal from the second driving signal output circuit to an inverter to drive a motor according to whether an operating power of the motor exceeds a power threshold.

A motor driving circuit control method, comprising:

• outputting a six-step square wave driving signal by a first driving signal output circuit;
• outputting a space-vector driving signal by a second driving signal output circuit;
• detecting whether an operating power of a motor exceeds a power threshold by a motor driving circuit;
• outputting the six-step square wave driving signal to an inverter to drive the motor by the motor driving circuit on the condition that the operating power exceeds the power threshold;
• and
• outputting the space-vector driving signal to the inverter to drive the motor by the motor driving circuit on the condition that the operating power does not exceed the power threshold.