Operational characteristics of an IPM-type bearingless motor with 2-pole motor windings and 4-pole suspension windings
Operational characteristics of an IPM-type bearingless motor with 2-pole motor windings and 4-pole suspension windings
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DOI：
10.1109/ecce.2015.7310209
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发表时间：
2015-09
期刊：
影响因子：
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通讯作者：
T. Matsuzaki;M. Takemoto;S. Ogasawara;S. Ota;K. Oi;D. Matsuhashi
中科院分区：
文献类型：
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作者：
T. Matsuzaki;M. Takemoto;S. Ogasawara;S. Ota;K. Oi;D. Matsuhashi
无轴承电机(Belm)综合了电机和磁轴承的特点。通常，高速操作采用表面安装的永磁体(SPM)型带环磁体并行磁化。值得注意的是，需要碳纤维绷带来固定环形磁铁。然而，当将SPM型带应用于高输出电机时，由于碳纤维带和环形磁铁产生的较宽的磁隙，很难产生足够的悬浮力。此外，大型环形磁铁和碳纤维绷带的制造成本较高。因此，为了以较低的成本实现高输出、高速度的电机带，我们重点研究了一种带有2极电机绕组和4极悬浮绕组的内置式永磁(IPM)型带电机。此外，在三维有限元分析的基础上，提出了一种抑制IPM型输送带悬浮力脉动的转子结构。在本研究中，制造了一台具有所提出的转子结构的IPM型传动带的样机。样机实验表明，所提出的转子结构能有效减小悬浮力脉动。此外，还对样机的工作特性进行了详细说明。
A bearingless motor (BelM) integrates the characteristics of an electric motor and a magnetic bearing. Typically, a surface-mounted permanent magnet (SPM)-type BelM with a ring magnet magnetized in parallel is employed for high-speed operation. It is noteworthy that a carbon fiber bandage is needed to fix the ring magnet. However, when an SPM-type BelM is applied to a high-output motor, it becomes difficult to generate sufficient suspension force because of the wide magnetic gap arising from the carbon fiber bandage and the ring magnet. In addition, the manufacturing cost for the large-scale ring magnet and the carbon fiber bandage is high. Therefore, to realize a high-output and high-speed BelM at a low cost, we have focused on an interior permanent magnet (IPM)-type BelM with 2-pole motor windings and 4-pole suspension windings. Moreover, a rotor structure for suppressing suspension force ripple arising in the IPM-type BelM has been proposed based on three-dimensional finite element analysis. In this study, a prototype of the IPM-type BelM with the proposed rotor structure is produced. Experiments with this prototype show that the proposed rotor structure is effective in reducing suspension-force ripple. Additionally, the operational characteristics of the prototype are shown in detail.