车用扁铜线永磁同步电机绕组损耗优化方法

电动汽车的普及符合国家可持续发展战略，扁铜线永磁同步电机因其高功率密度成为各电动汽车企业研究的热点。然扁铜线绕组产生的高频涡流损耗使得扁铜线永磁同步电机在高转速区域的铜耗大大增加，输出功率急速降低。为了有效解决其高频下输出功率降低的问题，本文提出一种扁铜线绕组优化的方法，能够有效降低扁铜线绕组损耗，提高扁铜线绕组电机高转速下的输出效率。并以一台48槽8极电动汽车用扁铜线永磁同步电机为例，建立场路耦合计算模型，计算比较电机绕组优化前后交流绕组铜耗及转矩输出，验证了方法的有效性。

Winding loss optimization method for flat copper wire permanent magnet synchronous motor for electric vehicles

The popularity of electric vehicles is in line with the national sustainable development strategy. Flat copper permanent magnet synchronous motors have become the hotspot of electric vehicle companies due to their high power density. However, the high-frequency eddy current loss generated by the flat copper wire winding makes the copper loss of the flat copper permanent magnet synchronous motor in the high-speed region greatly increased, and the output power is rapidly reduced. In order to effectively solve its high frequency output power reduction problem, this paper proposes a method for optimizing the flat copper wire winding, which can effectively reduce the winding loss of the flat copper wire and improve the output efficiency of the flat copper wire winding motor at high speed. Taking a 48-slot 8-pole electric vehicle flat copper wire permanent magnet synchronous motor as an example, a field-circuit coupling calculation model is established to calculate and compare the copper loss and torque output of the AC winding before and after motor winding optimization, and the effectiveness of the method is verified。