A Novel Multi-Dimensional SVPWM Strategy of Multiphase Motor Drives

Multiphase motor drives are multi-dimensional systems, so multiphase SVPWM must be implemented in a multi-dimensional vector space to satisfy motor's control requirements. In this paper, a novel multi-dimensional multiphase SVPWM strategy, which could synthesize the required voltage vectors not only in d-q subspace but also in other subspaces, is presented. Therefore, this strategy can control all voltage and current harmonics which contribute to the torque positively. Throughout this paper, a five-phase permanent motor drive system is developed as an example, and simulation and experimental results verify the validity of the proposed method. For the purpose of comparison, conventional SVPWM is also tested.