Design and analysis of a novel three-phase U-core stator PMSM with modular topology

This paper presents a novel three-phase U-core stator motor with the modular topology based on the conventional single-phase motor to solve the problems of high torque ripple and non-self-starting ability, which has the similar advanced performance as a two-phase motor. Basictopology and torque analysis are discussed for the proposed three-phase motor interms of the single-phase modules. Finite-element method (FEM) is carried out to compare and verify the competitive performance of the proposed motor and the practicability of such modular design concept. The dynamic starting performance in the proposed three-phase motor is finally simulated by utilizing the Simulink models and compared to those of the single-phase and two- phase models.