Analysis and Design of a 300-W 500 000-r/min Slotless Self-Bearing Permanent-Magnet Motor
Analysis and Design of a 300-W 500 000-r/min Slotless Self-Bearing Permanent-Magnet Motor
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DOI：
10.1109/tie.2013.2284159
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发表时间：
2014-08
影响因子：
7.7
通讯作者：
T. Baumgartner;R. Burkart;J. Kolar
中科院分区：
文献类型：
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作者：
T. Baumgartner;R. Burkart;J. Kolar
主动磁力轴承可实现非接触式操作，因此可用于支持高速旋转的转子。然而，传统的磁阻力磁悬浮轴承结构的转速是有限的，这主要是由于高转子损耗和有限的力控制带宽所致。本文提出了一种自承力电机样机，它克服了目前高速磁悬浮电机驱动系统的一些局限性。由于采用了磁轴承，电机可以在高纯度或真空环境中运行。介绍了一种分析的机械和电气轴承模型，并通过测量进行了验证。在此基础上，设计了一个轴承逆变系统，并给出了系统的控制器性能。以505000 r/min的速度旋转悬浮转子的测量结果验证了整个系统的功能。据作者所知，这是迄今为止磁悬浮电力驱动系统达到的最高速度。
Active magnetic bearings enable contactless operation and can therefore be used for supporting rotors spinning at high speeds. However, the rotational speed in conventional reluctance-force-based magnetic bearing topologies is limited, which is mainly due to high rotor losses and limited force control bandwidths. In this paper, a prototype of a self-bearing motor is presented, which overcomes several limitations of state-of-the-art high-speed magnetically levitated electric drive systems. Due to the employed magnetic bearing, the motor can be operated in high-purity or vacuum environments. An analytical mechanical and electrical bearing model is introduced and verified by measurements. Furthermore, a bearing inverter system is designed, and its controller performance is shown. Measurements of spinning levitated rotors up to speeds of 505 000 r/min verify the functionality of the overall system. To the authors' knowledge, this is the highest speed achieved by magnetically levitated electrical drive systems so far.