Torque ripple calculation of two-phase IM supplied by three-leg VSI with PWM output voltage control

Abstract

The contribution deals with steady state estimation of an electromagnetic torque ripples and a current waveform of a two-phase induction motor (IM) supplied by an three-leg IGBT bridge connected voltage source inverter (VSI). The inverter's output voltage is controlled by a modified sinusoidal SPWM of the input DC voltage. The complex Fourier series analysis of the inverter's output voltage was made, to obtain a spectrum of the harmonic supply voltage. The different voltage harmonics have been applied to the two-phase induction machine model to obtain electromagnetic torque and supply current waveforms for various operation states.