SVM strategies for multiphase voltage source inverters

This paper compares Space Vector Modulation (SVM) strategies for multiphase inverters. Symmetric, discontinuous, and group-based SVM and Sinusoidal Pulse Width Modulation (SPWM) are compared against each other. Implementation techniques for n-phase modulation are discussed using the Vector Space Decomposition (VSD) and a direct approach using inverse Clarke transformation including harmonic injection. The modulation techniques are validated experimentally using a 3-phase and 9-phase brushless permanent magnet (BLPM) machine drive system.