Analytical method of a calculation of a torque ripple a two-phase pmsm supplied by a pwm controlled inverter

The paper deal with steady-state analysis of a two-phase permanent magnet synchronous motor (PMSM) drive with a voltage-source inverter is presented. A complex Fourier series approach is used to predict the inverter output voltage and line current waveform. Assuming the output inverter's voltage is controlled by a pulse-width modulation (PWM). The permanent magnet synchronous motor model is obtained from its analogy to the fixed-excited synchronous motor. From the induced voltage and line current waveforms the electromagnetic torque ripple waveform is calculated.