摘要:提出了一种低热耦合无电磁耦合的双余度永磁同步电动机。该电机在12槽10极双层分数槽集中绕组永磁同步电动机的基础上,在各相绕组间设置小齿和隔热板,使各相之间无电磁耦合,热耦合很低。借助于有限元分析,通过优化小齿形状和合理选择小齿所占空间角度,可以有效地改善永磁电动势波形,并能削弱特定次数的谐波电动势;选择合适的永磁体极弧系数,能够降低小齿对齿槽转矩的影响。经理论分析和仿真验证,证明所提出的电机方案可行。
关键词:双余度永磁同步电动机;有限元;电磁场分析 Abstract: A dual-redundancy PMSM with weak thermal coupling and no electromagnetic coupling was proposed. Based on 12-slots 10-poles PMSM with double layer fractional-slot concentrated windings, added a small tooth with heat shields between windings of different phases. So there′s no electromagnetic coupling among phases, and the thermal coupling is weak. The paper optimized the shape of the small tooth and the angle it occupied, to weaken specific harmonics of the electromotive force. Choosing the pole arc coefficient with the finite element method reduced the influence on the cogging torque of the small tooth. Through theoretical analysis and simulation, it′s proved that the proposed motor has good performance and high reliability.
Key words: dual-redundancy PMSM(DRPMSM), finite element, electromagnetic field analysis
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