One equivalent distributed winding acts for the concentrated winding, so the step air gap is changed into uniform gap. And analysis of shaded pole motors with rotating fieled theory is very simple.

• 提出等效分布绕组的概念,用一个等效的具有正交分布的绕组代替阶梯气隙罩极电动机的集中绕组,将气隙处理成均匀气隙,然后用旋转磁场理论进行分析,给出一种简单的适合工程计算的方法。