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Space vector pulse width modulation is an advanced modulation algorithm which offers many advantages over the sinusoidal pulse width modulation technique. Space vector pulse width modulation is a well-researched topic for three-phase inverters, but only a very few works have been reported in the literature on the application of the space vector pulse width modulation technique for single-phase inverters. Conventional space vector pulse width modulation algorithms for single-phase inverters have concentrated mainly on two-level inverters where the reference vector falls only in two sectors. But for single-phase multilevel inverters, the switching patterns in different sectors are to be properly controlled for generating the desired number of levels. This paper proposes a new space vector pulse width modulation algorithm for single-phase multilevel inverter which incorporates an efficient algorithm for the proper selection of switches in different sectors to get the desired number of levels in the output voltage. The proposed algorithm is implemented on a simplified seven-level inverter which uses fewer numbers of switches in comparison with the conventional cascaded multilevel converter. The validity of the suggested space vector pulse width modulation technique is verified through simulations and experiments.

A New Space Vector Pulse Width Modulation Technique for Single-Phase Seven-Level Inverter with Reduced Number of Switches