A Space Vector PWM Signal Generation for Five Level Five Phase Inverter Drives

Abstract

A space vector PWM (SVPWM) method for a five phase five level inverter is proposed. Two three level inverters are fed from opposite ends of an open end winding induction motor to create five level inversion. The proposed scheme is based on adding an offset voltage to the sampled reference voltage to achieve multilevel operation. The use of carrier region to identify the reference location will simplify the implementation of the algorithm. The eligible vectors, regions and switching sequence of the five vectors that define the accessible region can be directly determined from the modulation index value. This makes it easier to implement the optimal five vectors, and it is extendable to any multiphase multilevel inverter (odd number of levels) by simply changing the carrier region. The proposed algorithm was simulated in MATLAB/SIMULINK, and the results are presented.