转子切向旋转和径向悬浮解耦的单绕组无轴承磁通切换电机驱动控制策略研究

Drive control strategy of single-winding bearingless flux-switching permanent magnetic motor with decoupling control of rotation and suspension

为了进一步提高定子绕组、定子槽空间等的利用率,在维持传统12/10磁通切换电机12个线圈基本结构基础上,通过合理的线圈分相,构建能够在空间产生互差120°三个对称悬浮力分量的六相单绕组;针对该绕组结构,从偏置磁场和悬浮电流分量角度,建立转子径向悬浮力模型;构建转子切向旋转和径向悬浮相互解耦的驱动控制策略。利用有限元分析和实验相结合方法,对所提驱动系统进行验证,结果表明,转子在额定负载情况下,径向位移控制误差小于±0.15 mm;转子切向和径向控制相互解耦。

In order to further improve the utilization of winding and stator slot space,a six-phase single winding bearingless flux-switching permanent magnet motor（ BFSPMM） is proposed. By implementing reasonable coil subdivision in traditional 12/10 type,the proposed BFSPMM can generate three symmetrical levitation force components in space. According to the structure of the winding,the rotor radial suspension force model is established by the bias magnetic field and the suspension current component. And the driving control strategy of rotor tangential rotation and radial suspension mutual decoupling is constructed. The finite element analysis and the experimental method are used to verify the proposed drive system. Results show that the radial displacement control error of the rotor is less than± 0. 15 mm under the condition of rated load. The tangential and radial control of the rotor are decoupled from each other.