Modelling and Simulation of a Seven-Phase Voltage Source Inverter Using Space Vector Theory

Vol.1 No.1

Year: 2007

Issue: Jul-Sep

Title: Modelling and Simulation of a Seven-Phase Voltage Source Inverter Using Space Vector Theory   

Author Name: Shaik Moinuddin, Atif Iqbal   

Synopsis:   

Multi-phase ac motor drives are nowadays considered for various 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 seven-phase voltage source inverter based on space vector approach. The leg voltages and line voltages along with phase voltages are illustrated. The Fourier analysis of output phase-to-neutral voltages, adjacent line voltages and non-adjacent line voltages is performed for fourteen-step and Pulse Width Modulation (PWM) modes of operation. The output phase-to-neutral voltage is shown to be essentially identical to those obtainable with a three-phase voltage source inverter.

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