Space Vector Model of A Five-Phase Voltage Source Inverter

Multi-phase AC motor drives are nowadays considered for numerous applications, due to numerous advantages that they offer when compared to their three-phase counterparts. Adjustable speed drives are invariably supplied from a voltage source inverter. Proper modelling of voltage source inverters is important in devising appropriate control algorithm. This paper develops complete model of a five-phase voltage source inverter based on space vector approach. Both ten-step operation and pulse width modulation modes are elaborated. The Fourier analysis of output phase-to-neutral voltage is performed for ten-step mode of operation. The output phase-to-neutral voltage is shown to be essentially identical to those obtainable with a three-phase voltage source inverter. The inverter developed model is verified using simulation.