Speed Range Extension of a Dual-Stator PM Machine Using Winding Switching Strategy

Abstract

In this paper, a novel winding switching concept is proposed for speed range extension of a dual-stator permanent magnet machine (DS-PMM). A winding switching circuit with two switch groups is designed for the winding reconfiguration to enable the machine to operate in three modes. The objective machine structure and the winding switching principle are introduced first. With the flux linkage method, the torque-speed characteristics of the machine under different operating modes are predicted. The feasibility of the proposed winding switching strategy for further extending the speed range of the DS-PMM is verified by both finite element (FE) analysis and experiments.