基于麦克斯韦应力法的双绕组无轴承开关磁阻电机新型数学模型

发布时间：2019-05-19 00:00

【摘要】：现有的双绕组无轴承开关磁阻电机麦克斯韦应力法数学模型忽略了相互垂直方向上径向悬浮力的耦合,但当转子偏离定转子齿极中心对齐位置较大时存在较强的耦合,故现有模型难以满足高精确度稳定悬浮控制要求。选择一种计及相互垂直方向悬浮力耦合的新积分路径,建立了基于麦克斯韦应力法的双绕组无轴承开关磁阻电机新型数学模型,同时为计及电机磁路的饱和特性,采用最小二乘法对铁心材料的非线性磁化曲线进行拟合,求解考虑磁饱和的各气隙磁密。通过与有限元仿真结果对比,验证了所建模型不仅揭示了相互垂直方向上径向悬浮力的耦合关系,考虑了磁饱和特性,且具有精确度良好、计算量小等优点,为实现高精度稳定悬浮控制奠定了基础。
[Abstract]:The existing mathematical model of double winding bearingless switched reluctance motor neglects the coupling of radial levitation force in the vertical direction of each other, but there is a strong coupling when the rotor deviates from the center of the tooth pole of the rotor. Therefore, the existing models are difficult to meet the requirements of high accuracy and stable suspension control. A new integral path considering the coupling of vertical levitation forces is selected, and a new mathematical model of double winding bearingless switched reluctance motor based on Maxway stress method is established, which takes into account the saturation characteristics of the magnetic circuit of the motor. The nonlinear magnetization curve of the core material is fitted by the least square method, and the magnetic density of each air gap considering magnetic saturation is solved. Compared with the finite element simulation results, it is verified that the model not only reveals the coupling relationship of radial levitation forces in the vertical direction of each other, but also takes into account the magnetic saturation characteristics, and has the advantages of good accuracy and small amount of calculation. It lays a foundation for the realization of high precision and stable suspension control.
【作者单位】：河海大学能源与电气学院;
【基金】：国家自然科学基金(51477042)
【分类号】：TM352

【相似文献】