Comparison of vector control of two-phase induction motor using continuous and discontinuous SVPWM in terms of switching losses investigations

Abstract

Vector control of unsymmetrical two-phase induction motor (TPIM) drives is attractive to researchers. Several methods have been proposed for improved TPIM drives such as V/Hz control, scalar control, direct torque control and vector control. However, a switching loss problem is serious in high switching frequency applications. The system efficiency can be improved by reducing switching losses. This paper proposes two types of modulation methods namely time-based continuous space vector PWM and time-based discontinuous space vector PWM for comparing switching losses in vector controlled two-phase induction motor drives. The dynamic performance and total harmonic current distortion are discussed. Simulation results illustrate the satisfied performance of the proposed motor drive system. The control system is implemented on Matlab-Simulink. The simulation results show that the discontinuous time-based space vector PWM gives lower total loss, lower switching loss and lower total harmonic current distortion than the time-based continuous space vector PWM.