New inverter-driven design and control method for two-phase induction motor drives

Abstract

A simple inverter circuit is proposed for driving symmetrical and unsymmetrical two-phase induction motors. The inverter provides two-phase independently controlled variable-frequency variable voltages to the primary and auxiliary windings of an induction motor. The dynamic model of the two-phase induction motor driven by the inverter is established. An experimental prototype, which consists of a single-chip microprocessor-based controller, the inverter, and the motor and load, is constructed. Both computer simulation and experimental results show the effectiveness of the proposed inverter-driven motor in achieving higher performance, such as less torque and speed pulsation and reduced vibration and noise, than the conventional motors.