Torque improvement of spoke-type permanent magnet motor with auxiliary stator using harmonic current control strategy

The spoke-type permanent magnet motor with auxiliary stator exhibits high torque performance owing to the flux focus effects. To further improve its density, this paper proposes a control method by using harmonic current strategy. Based on theoretical analysis, 3-D look-up table dq-axis and electrical angle is established aid of finite element (FEM). maximum per ampere curve at each rotor position identified summarized adequately indicate relationship between amplitude motor. Through derivation, it concluded that minimum cost contour line ∂Te/∂i 2 , which can be employed identify for density improvement. Compared traditional strategies, proposed strategy increase forward reverse 1.22% 1.40%, respectively. experimental results verify analysis simulation results, as well prove effectiveness