电动汽车用永磁同步电机铁心采用非晶合金与硅钢的性能比较

Comparative Analysis of Silicon Steel and Amorphous on the Performance of Permanent Magnet Synchronous Motors on Electric Vehicles

电动汽车用驱动电机设计制造工艺日趋成熟,从设计方面考虑电机性能的提升很难再有所突破。非晶合金是一种新型功能材料,具有高导磁率、低损耗及低矫顽力等优点,将其应用于电机定子铁心可以降低定子铁耗从而提高电机效率。为研究电机定子铁心采用非晶合金和硅钢对其性能的影响,本文对两台结构相同、定子铁心分别采用硅钢和非晶合金的永磁同步电机进行性能计算,对比硅钢电机和非晶合金电机的磁通密度分布、铁耗分布。随后对两台电机进行实验,得到硅钢电机和非晶合金电机的效率MAP图。结果表明,在高速区非晶合金电机相比硅钢电机具有铁耗低和效率高的优势,而在低速和大转矩下,其优势较小。

The design and manufacturing process of drive motors for electric vehicles is becoming more and more consummate.It is difficult to increase the efficiency of motors only by improving motor design.Amorphous alloy is a new type of functional material.It has the advantages of high magnetic permeability,low loss,and low coercive force.Applying it to the stator core of the motor can reduce stator iron loss and improve motor efficiency.In order to study the effect of amorphous and silicon steel on electric machines in electrical vehicles,the performance calculations of two identical structures and stator cores using silicon steel and amorphous permanent magnet synchronous motors were conducted in this paper.The comparison of silicon steel motors and amorphous motors was performed.The distribution of magnetic density and iron loss were calculated.Then two motors were tested to obtain the MAP of the efficiency.The results show that in the high speed region,the amorphous motor has the advantages of lower iron loss and higher efficiency than the silicon steel motor,while its advantage is less at low speed and high torque region.