Abstract
The reverse-salient permanent magnet synchronous motor (RSPMSM) has application prospects in electric vehicles due to its wide constant-power speed range. In this paper, a novel RSPMSM is proposed and its torque characteristics are analyzed. D-axis inductance is greater than q-axis inductance by adopting segmented permanent magnet and petal-shape rotor. To utilize the reluctance torque, the d-axis current is flux-intensifying at or below the rated speed, which widens the current angle adjustment range. The magnetic barrier and permanent magnet dimensions are optimized by the finite element method (FEM). The electromagnetic torque and constant-power speed ranges are considered comprehensively, and the optimal model of the RSPMSM is determined. The electromagnetic characteristics of the RSPMSM are evaluated. The results show that the RSPMSM exhibits a wide constant-power speed range and it is suitable for application in electric vehicles.
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