无轴承电机的通用可控磁悬浮力解析模型

General Analytical Model About Controllable Magnetic Suspension Force of Bearingless Motor

为解析研究无轴承电机的基础理论和共性规律,给出二极悬浮控制四极无轴承电机电感矩阵解析模型,然后根据虚位移原理推导了无轴承电机通用静向(即沿静止坐标向)可控磁悬浮力的解析模型,该模型既适用于凸极型转子结构无轴承电机,又适用于圆柱型转子结构无轴承电机。通过在该通用解析模型中设置不同的极弧宽度参数,衍生出无轴承同步磁阻电机、表面式永磁无轴承电机和无轴承异步电机的可控磁悬浮力解析模型。针对无轴承异步电机进行了可控磁悬浮静力实验和分析,应用实例验证了推导出的通用可控磁悬浮力解析模型的有效性和正确性。

To research the fundamental theory and common rules of bearingless motor, the analytical model on inductance of 4-pole bearingless motor with 2-pole controlling windings was given. Based on the inductance model and virtual displacement principle, the general analytical model on magnetic suspension force of bearingless motor in the direction of stationary reference axes had been derived. The general model on magnetic suspension force could be not only applicable to bearingless motor with salient-pole rotor, but also applicable to bearingless motor with cylindrical rotor. By setting different salient-pole parameter in the general magnetic suspension force model, the models on magnetic suspension force of different types of bearingless motor, such as： synchronous reluctance bearingless motor, bearingless induction motor, surface permanent magnet bearingless motor, were derived. Aiming at bearingless induction motor, the static magnetic suspension force experiment and analysis had been made. Experimental result proves the validity of the derived analytical model on controllable magnetic suspension force from an applied example.