Structure of One-Axis Controlled Repulsive Type Magnetic Bearing System With Surface Permanent Magnets Installed and Its Levitation and Rotation Tests
Structure of One-Axis Controlled Repulsive Type Magnetic Bearing System With Surface Permanent Magnets Installed and Its Levitation and Rotation Tests
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DOI：
10.1109/tmag.2011.2160403
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发表时间：
2011-06
影响因子：
2.1
通讯作者：
T. Ohji;Y. Katsuda;K. Amei;M. Sakui
中科院分区：
文献类型：
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作者：
T. Ohji;Y. Katsuda;K. Amei;M. Sakui
提出了一种新型的具有表面永磁体电机功能的单轴可控排斥式磁轴承系统的轴承结构。我们通过使用4极4段式和4极Halbach阵列来评估磁轴承结构，这些阵列放置在圆柱形永久磁铁组周围作为场磁铁。有限元分析结果表明，Halbach阵列在总谐波畸变率和内部磁场影响方面优于4段阵列。此外，通过在新开发的设备中实施每种轴承配置进行悬浮和旋转测试。在两种轴承配置中，在零功率位置建立了稳定的悬浮，并实现了高达约16000 rpm的高速旋转。因此，海尔贝克阵列略微节省了电力。其对电机的总输入功率约为1.2 W。
This paper deals with a new bearing structure of one-axis controlled repulsive type magnetic bearing system that has a motor function of a surface permanent magnet (SPM). We evaluated the magnetic bearing structures by using the 4-pole 4-segment type and 4-pole Halbach array, which were placed around cylindrical permanent magnet sets as field magnets. The comparison of magnetic flux density in the radial direction measured by finite-element analysis indicated that the Halbach array has advantages over the 4-segment type in terms of the total harmonic distortion and internal magnetic influence. Additionally, levitation and rotation tests were performed by implementing each bearing configuration in a newly developed equipment. In both bearing configurations, stable levitation at zero-power position was established and high-speed rotation up to around 16 000 rpm was achieved. As a result, the Halbach array slightly saved electric power. Its total input power to the motor was approximately 1.2 W.