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交流主动磁轴承采用三相逆变器驱动,能够降低功放损耗,减小体积,降低磁轴承整体成本,且逆变器易于与DSP连接,实现磁轴承高速高精数字控制。在介绍交流磁轴承的结构和工作原理基础上,导出了磁轴承径向悬浮力的数学模型。依据试验样机需要满足的性能要求,对磁轴承主要参数进行了设计和优化,并利用Ansoft有限元软件对径向悬浮力进行了分析,最后对交流磁轴承进行了静态起浮和扰动实验。理论研究和试验表明,交流主动磁轴承的磁路结构设计合理,静态悬浮力和最大悬浮力满足性能要求,对研制高性能低成本交流磁轴承具有参考和应用价值。
The AC active magnetic bearing is driven by a three-phase inverter, which can reduce the power loss, reduce the volume, reduce the overall cost of the magnetic bearing, and the inverter is easy to be connected with the DSP to realize high-speed and high-precision digital control of the magnetic bearing. Based on the introduction of the structure and working principle of AC magnetic bearing, the mathematical model of radial levitation force of magnetic bearing is derived. The main parameters of the magnetic bearing are designed and optimized according to the performance requirements of the prototype. Ansoft finite element software is used to analyze the radial levitation force. Finally, the AC magnetic bearing is subjected to static launch and disturbance experiments. Theoretical studies and tests show that the design of the magnetic circuit structure of AC active magnetic bearings is reasonable, the static levitation force and the maximum levitation force meet the performance requirements, which is of reference and application value for the development of high performance and low cost AC magnetic bearings.