Analytical Prediction for the Cogging Torque of the Permanent Magnet Machines With Multi-Pole Rotor

다극회전자를 갖는 영구자석기기의 코깅토크에 대한 해석적 예측

This paper deals with analytical prediction for the cogging torque of permanent magnet machines with multi-pole rotor First. open-circuit field solutions are derived using a magnetic vector potential and a two-dimensional (2-d) polar coordinate systems. On the basis of derived open-circuit field solutions and 2-d permeance functions. we also derive the analytical solutions for the open-circuit field considering stator slotting effects and cogging torque. All analytical results are shown in goof agreement with those obtained from finite element (FE) analyses.