Development Policy of SMC to Improve Efficiency of Axial Gap Motor Employing Coreless Rotor Structure
Development Policy of SMC to Improve Efficiency of Axial Gap Motor Employing Coreless Rotor Structure
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DOI：
10.1109/icem49940.2020.9270995
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发表时间：
2020-08
期刊：
影响因子：
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通讯作者：
R. Tsunata;M. Takemoto;S. Ogasawara;Tatsuya Saito;T. Ueno
中科院分区：
文献类型：
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作者：
R. Tsunata;M. Takemoto;S. Ogasawara;Tatsuya Saito;T. Ueno
近年来，为了最小化系统尺寸以及提高效率，期望具有扁平形状的电动机。因此，轴向间隙电机（AGM）吸引了显着的关注，因为它们可以实现更高的扭矩密度比传统的径向间隙电机（RGMs）在平面形状。一般来说，AGM采用软磁复合材料（SMC）作为定子芯，因为它们具有不同于RGM的三维磁路。如果AGM采用具有低铁损特性的SMC，则可以提高效率。另一方面，平均转矩降低，因为SMC基本上具有铁耗特性和磁导率之间的折衷关系。因此，在本研究中，提出了一种具有无芯转子结构的AGM，其转矩性能不易受SMC的磁导率的影响。在本文中，许多虚拟SMC材料，具有不同的铁损和磁导率被认为是拟议的AGM采用无芯转子结构。最后，通过三维有限元分析（3D-FEA），揭示了合适的SMC特性，以提高效率在一个较宽的操作范围。
In recent years, electric motors having flat shape are desired in order to minimize system size as well as enhancing the efficiency. Therefore, axial gap motors (AGMs) have attracted significant attention because they can achieve higher torque density in flat shape than that of conventional radial gap motors (RGMs). In general, AGMs employ the soft magnetic composite (SMC) for the stator core since they have three dimensional magnetic paths unlike RGMs. If AGMs employ the SMC which has low iron loss characteristic, the efficiency can be improved. On the other hand, the average torque is decreased because the SMC basically has tradeoff-relationship between the iron loss characteristic and the permeability. Hence, in this research, an AGM having coreless rotor structure that torque performance is not easily affected by the permeability of the SMC is proposed. In this paper, many virtual SMC materials which have different iron loss and permeability are considered for the proposed AGM employing the coreless rotor structure. Finally, suitable SMC characteristic to enhance the efficiency over a wide operating range is revealed by three-dimensional finite element analysis (3D-FEA).