Examination of Enhancing Efficiency of Axial Gap Motor in High Speed and High Torque Region by Adopting Neodymium Bonded Magnet
Examination of Enhancing Efficiency of Axial Gap Motor in High Speed and High Torque Region by Adopting Neodymium Bonded Magnet
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DOI：
10.1541/ieejias.140.939
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发表时间：
2020-12
影响因子：
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通讯作者：
R. Tsunata;M. Takemoto;S. Ogasawara;K. Orikawa;Saito Tatsuya;T. Ueno
中科院分区：
文献类型：
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作者：
R. Tsunata;M. Takemoto;S. Ogasawara;K. Orikawa;Saito Tatsuya;T. Ueno
近年来，该国发电量的一半以上被电动机消耗。因此，高性能电动机特别是对于工业应用是期望的。此外，期望减小电动机尺寸。最近，已经提出并研究了称为轴向间隙型的电动机，以实现高转矩和小尺寸。轴向间隙电机通常适用于需要圆盘形状的应用。传统的轴向间隙电机经常采用Nd烧结永磁体（PM）来实现高扭矩。然而，由于永磁体中产生的涡流损耗，具有Nd烧结永磁体的轴向间隙电机在高转速下不是非常高效。也已经提出了使用铁氧体永磁体的轴向间隙电动机，但是转矩密度低。本文提出了一种采用钕粘结永磁材料的轴向间隙电机，以实现高速高转矩区的高效率。通过三维有限元分析和实验，将所提出的Nd粘结永磁轴向间隙电机与其他Nd烧结永磁和铁氧体永磁轴向间隙电机进行了比较。结果表明，在高速高转矩区，Nd粘结永磁比Nd烧结永磁和铁氧体永磁更能有效地提高轴向间隙电机的效率。
In recent years, more than half of the electric power generated in the country is being consumed by motors. Therefore, high performance motors are desired especially for industrial applications. In addition, it is desirable to reduce motor size. Recently, motors called axial gap type have been proposed and researched to achieve both high torque and small size. Axial gap motors are generally suitable for applications requiring flat shape such as a disk. Conventional axial gap motors frequently employ Nd sintered permanent magnets (PMs) to achieve high torque. However, axial gap motors with Nd sintered PMs are not very e ffi cient at high rotational speed due to the eddy current loss arising in the PM. Axial gap motors that use ferrite PMs have also been proposed, but torque density is low. In this paper, an axial gap motor using Nd bonded PMs is proposed to achieve high e ffi ciency in the high-speed and high-torque region. The proposed axial gap motor using Nd bonded PM is compared with other axial gap motors employing Nd sintered PM and ferrite PM through 3D-FEA and experiments. Consequently, it was found that the Nd bonded PM is more e ff ective in enhancing the e ffi ciency of an axial gap motor in the high-speed and high-torque region, compared with Nd sintered PM and ferrite PM.