Automotive starter-generator applications require a high peak torque for cranking and a wide speed flux weakening region for generation. In such applications, the pole-changing winding induction machine offers a wide speed flux weakening region with a low pole number and a high peak torque capability when operated with a higher number of poles. In this article, a 6-phase, electronic pole-changing winding induction machine with improved performance over the existing 3-phase pole-changing is discussed. Compared to the 3-phase 120 ^o phase belt winding, the proposed 6-phase pole-changing winding induction machine shows a 15 % increase in peak torque due to improved winding factor. Finite element analysis is used to predict the torque capability, losses and efficiency of the 6-phase and 3-phase pole-changing winding induction machines. A 1kW induction machine is prototyped and the improved torque capability of the 6-phase pole-changing machines over 3-phase counterparts is experimentally validated under various operating conditions.

中文翻译：

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性能提高的六相变极绕组感应电机

汽车起动机-发电机应用需要高峰值扭矩来进行起动，并需要宽速度的弱磁区域来进行发电。在这种应用中，变极绕组感应电机在极数较多的情况下，可提供极低的极数和较高的峰值转矩能力的宽速度磁通弱化区域。本文讨论了一种六相电子变极绕组感应电机，该电机在现有三相变极的基础上具有改进的性能。与三相120 ^o相比相带式绕组，由于绕组系数的提高，建议的六相变极绕组感应电机的峰值转矩增加了15％。有限元分析用于预测6相和3相变极绕组感应电机的转矩能力，损耗和效率。原型为一台1kW感应电机，并且在各种运行条件下，通过实验验证了六相变极机相对于三相变极机提高的扭矩能力。