Space vector PWM technique for a three-level six-phase drive

Abstract

A space vector pulse-width modulation (SVPWM) strategy for a three-level six-phase drive based on vector space decomposition (VSD) approach is presented for the first time in this paper. The steps, requirements and conditions in determining the right switching sequences for the proposed modulation strategy are explained in detail. The developed SVPWM strategy is then simulated in Matlab/Simulink while driving a symmetrical six-phase induction machine running at no load. Obtained results prove the validity of the algorithm.

Space vector PWM technique for a three-level asymmetrical six-phase drive

“…Usually, these subsequent switching states can be easily determined since they are projected in the same sector as the projection of starting switching state in the α-β plane [4][5][6]9]. However, for asymmetrical six-phase case, this is not applicable.…”

“…three-level, inverter can also be used to drive the multiphase machine. The most common three-level topology is neutral-point-clamped (NPC) topology, which has been used for multiphase drives [3][4][5][6]. As the number of inverter's output leg voltage levels and the number of machine's phases increase, the complexity of developing a proper SVPWM will also increase.…”

“…This modulation technique is then modified further and compared with carrier-based modulation strategies in [4]. Furthermore, the optimised steps of developing SVPWM algorithm presented in [4] are also adapted and applied for multilevel symmetrical six-phase and seven-phase drives in [5] and [6], respectively. This paper, for the first time, introduces a SVPWM strategy for a three-level asymmetrical six-phase drive based on the VSD approach.…”

A Space Vector PWM Technique for a Three-Level Symmetrical Six-Phase Drive

“…This paper builds on [14], where basic principles of the SVPWM algorithm for a three-level symmetrical six-phase drive, based on the VSD approach, were introduced. In [14], the developed algorithm was evaluated purely by simulation and without considering some practical aspects, such as dead time. In this paper, the SVPWM algorithm is for the first time implemented and validated experimentally.…”

“…The outline of this paper is as follows. In Section II, the proposed SVPWM algorithm, introduced in [14], is revisited. Practical implementation of developed SVPWM algorithm is summarized in Section III.…”