Reduction of cogging torque in surfacemounted permanent magnet brushless motor based on Motorsolve

Reduction of cogging torque of radial flux permanent magnet brushless DC motor by magnet shifting technique

“…skewing of either stator or rotor, magnet pole arc variation, shifting of slot opening, teeth notching, unequal teeth width, magnet shaping and sizing, pole arc to pole pitch ratio, fractional pole pairs, number of slots/pole, addition of dummy slots, variation in air-gap length, magnet pole shaping, lowering magnet flux density, choosing proper thickness of stator teeth tips, variation in width of slot opening, etc. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Skewing of either stator or rotor results in undesirable axial thrust.…”