A Basic Study of a Novel Homopolar-Type Magnetic Bearing Unifying Four C-Shaped Cores for High Output and Low Loss
A Basic Study of a Novel Homopolar-Type Magnetic Bearing Unifying Four C-Shaped Cores for High Output and Low Loss
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DOI：
10.1109/intmag.2015.7157788
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发表时间：
2015-07
影响因子：
2.1
通讯作者：
T. Matsuzaki;M. Takemoto;S. Ogasawara;K. Nishihama;D. Kori;K. Nagata
中科院分区：
文献类型：
--
作者：
T. Matsuzaki;M. Takemoto;S. Ogasawara;K. Nishihama;D. Kori;K. Nagata
磁轴承（MB）可以无接触地悬浮转子轴，因此MB已被用于高输出和高速机器。通常，使用异极型MB结构，因为其结构简单且成本低。然而，异极型MB结构在由转子芯上的交变磁场引起的转子铁损方面存在问题。另一方面，一般的同极型MB结构具有由转子芯上的直流磁场引起的低转子铁损。然而，由于一般的单极型MB具有复杂的结构并且需要大的磁体来产生偏置磁通，因此其变得昂贵。因此，本文讨论了一种新的单极型MB结构统一的四个C形的核心，高输出和低铁损。三维有限元分析表明，新型同极型磁悬浮轴承比一般同极型磁悬浮轴承具有更低的铁损和更低的成本。
A magnetic bearing (MB) can suspend a rotor shaft with noncontact, so the MB has been used for high-output and high-speed machines. In general, heteropolar-type MB structure is used, because of its simple structure and low cost. However, the heteropolartype MB structure has a problem in terms of rotor iron loss caused by an alternating magnetic field on a rotor core. On the other hand, general homopolar-type MB structure has a low rotor iron loss caused by a dc magnetic field on a rotor core. However, as the general homopolar-type MB has a complicated structure and needs a large magnet for generating the bias flux, it becomes costly. Therefore, this paper discusses a novel homopolar-type MB structure unifying four C-shaped cores for high output and low iron loss. It is shown with three-dimensional finite element analysis that the novel homopolar-type MB has lower iron loss and lower cost than the general homopolar-type MB, which is known for its low iron loss.