与PAM(极幅调制)理论相比，最小对称组理论可更有效地实现交流电机变极绕组非正规方案。

Compared with PAM (pole Amplitude Modulation) theory, the minimum symmetric group theory is more effective in implementation of ac machine pole-changing winding's non-regular arrangements.

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基于上述三相交流电弧炉电路模型，分析了电流不对称和阻抗不对称对电弧功率的影响，并讨论了交流电弧炉三相电参数互相影响的复杂性。

The influences of the asymmetry of current and impedance on the arc voltage and power were analyzed, and the investigation complexity was also discussed.

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文章通过对绘制交流电机定子绕组展开图过程的分析，提出统一绘制三相对称绕组展开图的程序。

This paper introduces the judgement way of homonymous ends of three-phase windings about out of sync motor in cub modal , and analyses its principle .

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