逆变器驱动对三极径向–轴向混合磁轴承径向承载力的影响  

The Effects of Inverter-fed on Radial Carrying Capacity of Three-Pole Radial-axial Hybrid Magnetic Bearings

作　　者：鞠金涛[1] 朱熀秋[1] 张维煜[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏省镇江市212013

出　　处：《中国电机工程学报》2016年第11期3085-3091,共7页Proceedings of the CSEE

基　　金：江苏省自然科学基金项目(BK2012707;BK20150524);江苏省"333工程"资助项目(2014);江苏省"青蓝工程"资助项目(2014);江苏高校优势学科建设工程资助项目(2014);江苏大学高级人才基金资助项目(14JDG131);江苏省研究生培养创新工程(KYLX_1046)~~

摘　　要：三极径向–轴向混合磁轴承径向采用三相功率逆变器驱动,具有成本低、体积小、功耗低的优点。但由于逆变器三相电流和为零的条件以及三极磁轴承的自身结构特点,使逆变器驱动对磁轴承的径向承载力产生一些影响。该文首先介绍了三极径向–轴向混合磁轴承的结构与工作原理,建立气隙中磁通的数学模型,然后根据数学模型分析直角坐标轴各方向产生最大悬浮力的条件,并得到了各个方向最大悬浮力公式,采用有限元分析软件ANSOFT进行仿真分析,并进行实验验证,仿真、实验结果与分析结果一致。得出的结论对三极磁轴承的设计、安装和控制具有指导性意义。The three-pole radial-axial hybrid magnetic bearing is driven by three-phase inverter in the radial direction, because the three-phase inverter has the advantages of small volume, low power lost and low costs. However, the sum of three-phase currents of the inverter must be zero, which has effects on the radial carrying capacity of the magnetic bearings. The structure and work principle of three-pole radial-axial hybrid magnetic bearings were first introduced and the mathematic model of fluxes in air gaps was built. According to the model, the conditions of producing maximum suspension forces in positive and negative directions of rectangular coordinate axes were analyzed and the equations of maximum suspension force are derived. To proving the correctness of the analysis, finite element simulations were calculated by software ANSOFT and the experiment data were measured. The simulation and experiment results agree with the analytical results. The works of this paper are instructive and meaningful to the design, installation and control of three-pole magnetic bearings.

关 键 词：磁轴承 三极 径向–轴向 逆变器驱动 承载力 

分 类 号：TM341[电气工程—电机]