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轴向电磁轴承工作时通常会产生相当大的涡流损耗 ,这些涡流损耗会引起磁轴承和转子发热 ,影响转子的悬浮和运转。首先采用有限元分析软件对轴向电磁轴承的发热问题作了仿真计算 ,发现磁轴承线圈中高频电流幅度是影响发热最重要的一个参数。然后采用 L C滤波有效降低了高频电流幅度。最后通过实验证实 L C滤波有效地解决了轴向电磁轴承的发热问题。
Axial electromagnetic bearings usually produce considerable eddy current losses, these eddy current losses can cause magnetic bearings and rotor heat, affecting the rotor suspension and operation. First of all, finite element analysis software was used to simulate the heating problem of axial electromagnetic bearing. It is found that the amplitude of high-frequency current in magnetic bearing coil is the most important parameter that affects the heating. Then using L C filter effectively reduces the high-frequency current amplitude. Finally, experiments confirm that L C filter effectively solves the axial electromagnetic bearing heating problem.