Impact of inverter faults on the performances of SPWM and SVPWM control techniques

Pulse width modulation (PWM) control techniques have been widely used for induction motor speed variation due to their performances and advantages. Various researches in the field of control have shown that space vector PWM (SVPWM) technique has better performances than Sinusoidal PWM (SPWM). For example, lower total harmonic distortion (THD) for the SVPWM technique. However, these performances can be affected by inverter failures which are mostly related to IGBT faults. In this aim, this paper discusses the IGBT open circuit (OC) fault impact on the inverter performances. Therefore, time and frequency analysis based on power spectral density (PSD) estimation of stator currents will be developed. The impact of open circuit fault is therefore analyzed through several simulation tests.