This paper presents the working principles of single - phase permanent - magnet stepping motor this motors main characteristics are dissymmetry rotor and a winding on permanent - magnet . the winding on permanent - magenet is used for countervailing the flux of permanent - magnet . its very important during motor working 详细介绍了一种新型单相单拍运行的永磁步进电机的运行原理，该电机主要特点为不对称转子及永磁磁极上附加一产生抵销永磁磁势的绕组，在单相单拍运行时发挥重要作用。
