Permanent magnet synchronous motor with switchable N-T curves

Abstract

This paper proposes a novel permanent magnet synchronous motor with switchable speed-torque (N-T) curves. The structure and operational principle of the proposed motor are described. The proposed motor can be rotated as 3-phase and 6-phase motors. First, the theoretical N-T characteristics using the torque constant and inductance that are computed by 2-D FEM analysis are calculated. Second, the 2 N-T characteristics are verified using FEM analysis under vector control. Finally, the advantages and disadvantages of the proposed motor are described.