Dual stator winding induction machines (DSWIMs), which have two sets of three-phase windings with unequal pole pairs in their stator and a standard squirrel cage rotor, have overcame the narrow speed operation region and circulating current problems exists in other types of dual winding machines. These advantages are resulted from the independent operation of their winding sets. The independent operation of winding sets will be guaranteed if the flux saturation is avoided. This letter proposes a novel reference frame angle determination technique that not only guarantees the flux saturation avoidance but also results in flux optimization in DSWIMs. Despite pervious methods, the proposed method does not require position or speed sensor and it is easily applicable in various control schemes and in different reference frames. This method is implemented in a flux and torque vector control system for driving a 3.3 kW DSWIM. The experimental results confirm the effectiveness of the proposed method. Moreover, by implementing the proposed method, the torque sharing between the two winding sets is properly done according to the power rating of each of them.

中文翻译：

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双定子绕组感应电机气隙磁通最小化的最佳参考框架角方法

双定子绕组感应电机（DSWIM）的定子具有两组不等极对的三相绕组和一个标准的鼠笼转子，克服了窄速运行区域和其他类型双绕组存在的环流问题机器。这些优势源于其绕组组的独立操作。避免磁通饱和，保证绕组组独立运行。这封信提出了一种新颖的参考系角度确定技术，该技术不仅可以保证避免通量饱和，还可以优化 DSWIM 中的通量。尽管已有方法，所提出的方法不需要位置或速度传感器，并且很容易适用于各种控制方案和不同的参考系。该方法在用于驱动 3.3 kW DSWIM 的磁通和转矩矢量控制系统中实施。实验结果证实了所提出方法的有效性。此外，通过实施所提出的方法，两个绕组组之间的扭矩共享是根据每个绕组的额定功率正确完成的。