The inductance space distribution curve of brushless DC motor is non-sine waveform because of its centralized stator windings and 120 degree-wide permanent magnet. These factors make brushless DC motor in multiple saliencies and make the position estimation more difficult.
永磁无刷直流电动机的集中绕组及120°的永磁体宽度使其电感系数在空间呈非正弦分布,其高次谐波尤其是二次谐波不可忽略,这一特点使得永磁无刷直流电动机表现出多重凸极现象,给位置估计带来困难。
参考来源 - 集中绕组永磁无刷直流电动机的多重凸极研究·2,447,543篇论文数据，部分数据来源于NoteExpress
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