稀土永磁无刷直流电动机绕组嵌放对磁势的影响

应用于航空航天领域的稀土永磁无刷直流电动机采用多重电枢绕组技术以提高可靠性。采用隔槽嵌放的双绕组电机系统成本高,结构复杂。该文给出双绕组的一种同槽嵌放方式,对双绕组稀土永磁无刷直流电动机在单绕组工作和双绕组工作时,同槽和隔槽嵌放方式的磁势进行了理论分析,结果表明,在磁路饱和的情况下,单绕组工作时同槽嵌放电枢磁势的去磁作用小,而双绕组工作时,隔槽嵌放的电枢磁势去磁作用小;同槽嵌放更适用于冷备份余度模式,隔槽嵌放则宜于热备份余度模式。对电枢磁场、空载磁场、负载磁场和机械特性进行了有限元仿真计算,并对隔槽嵌放样机的机械特性进行了测试,仿真和测试结果验证了理论分析的正确性。

Effects of Armature Windings Embedding Methods on Magnetomotive Force of Rare Earth Permanent Magnet Brushless DC Motor

To our knowledge,in most cases,two sets of armature windings are embedded in every two stator slots of a dual-windings rare earth permanent magnet (REPM) brushless DC motor (BLDCM). The motor thus made is costly and complicated in its structure. To overcome these shortcomings,we used a new method for embedding two sets of armature windings in the same stator slot. We compared the magnetomotive force (MMF) of the dual-windings REPM BLDCM when it used the every two stator slots embedding method with that of t...