Abstract
A major advancement in the research area of space vector pulse width modulation (SVPWM) in recent years is the introduction of the nearest three vector algorithm computational intensity is still a drawback of SVPWM methods in real time applications, especially in the case of multilevel inverter operation. To solve the problem of computational complexity in multilevel inverters due to the large number of space vectors and redundant switching states, a simple space vector PWM method is proposed. Based on this method, the location of the reference voltage vector can be easily determined and the calculation of dwell times becomes very simple. More importantly, the proposed method is general and can be directly applied to the cascaded H-bridge inverter of any voltage levels. This proposed method is tested for seven level and nine level cascaded H-Bridge inverter drive system and the simulated results were presented.
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