Modeling and Simulation of Permanent Magnet Synchronous Machine with Six-Phase Stator Winding

Abstract

A novel simulation model for multiphase permanent magnet synchronous machines (PMSMs) formulated by the modified nodal analysis is proposed. The proposed model uses the voltage and torque equations on abc reference frame to formulate the multiphase PMSMs, so that it is not necessary to derive the state equations on dq reference frame corresponding to conduction modes of a power electronics circuit. Therefore, it is easy to simulate the complex systems consisting of multiphase PMSMs and power converters having many diodes or thyristors. The wind generator system consisting of a six-phase permanent magnet synchronous generator and two three-phase diode bridge rectifiers is discussed to show the effectiveness of the proposed simulation model. The simulation results show good agreements with the experimental ones. The proposed simulation model is considerably useful when the simulation of the system including multiphase PMSMs and the externally commutated power converter such as diode bridge rectifier is executed.