A Three-Phase PMSM with Double Inversely-Arrangedπ-Phase-Shift Three-Phase Windings

—Double Winding Arrangement, Dynamic Mathematical Model, and Vector Simulator—

Abstract

This paper proposes a new three-phase permanent-magnet synchronous motor that has new double three-phase windings. Each of the windings is arranged inversely in terms of space, and has a π rad phase shift to the other winding for a four-pole case. Even if one of the windings is damaged and shut down, the motor can continue to operate properly using the remaining healthy winding. The motor has a high fault tolerance and functional safety. The windings can have two different winding numbers of turns so that the motor can be driven efficiently in a wide range of speeds. The motor is suitable for use in passenger vehicles in accordance with “ISO 26262.” In addition to this new arrangement of double windings, this paper proposes a new dynamic mathematical model, and a new vector simulator for the motor, which are indispensable for the design of drive control systems.