An asymmetrical space vector method for single phase induction motor

Single phase induction motors are the workhorses in low-power applications in the world, and also where variable speed is necessary. Normally it is achieved either by the mechanical method or by controlling the capacitor connected with the auxiliary winding. Any of the above methods have some drawback for which the motor torque performance is not good enough. This paper addresses a new control method, an asymmetrical space vector method with PWM modulation, also a three-phase inverter is used for the main winding and the auxiliary winding. This method with PWM modulation is implemented to control the motor speed and to improve the torque performance. The control theory and simulation results are presented. This control method is verified by experimental results.