中文摘要：

推导了转子偏心时径向力计算模型，该模型考虑了磁饱和和边缘磁通，并与有限元计算结果进行了比较，验证了模型具有较高的实用价值．计算表明，转子偏心时径向力的大小与励磁电流和位置角的关系受磁饱和的影响呈非线性变化．偏心方向处气隙磁场饱和后，径向力会随着电流的增大而变小，当偏心反向处磁场亦饱和后，则转子受到的径向力合力趋近于0．针对转子偏心时作用在转轴上的较大径向力，提出了采用每极绕组独立控制，通过施加不对称电流法进行补偿，该方法理论上可使作用在转子上的不平衡力趋近于0．

英文摘要：

Based on the field analysis, a new simplified radial force model was established in which saturation and fringing flux were considered. The model was compared with those from finite element method. Furthermore, the relationship between the radial eccentric force, rotor position and currents was given which was influenced by the magnetic saturation. It was shown that the radial force decreases with the increasing current for saturation and approaches zero when the field of opposite direction also reaches saturation. Finally, a remedial strategy by using pole currents independently controlled was proposed, which ake the total radial force on the rotor decrease to zero in theory