考虑开槽和饱和时鼠笼异步电动机谐波的解析计算  

Analytical calculation for harmonics in squirrel-cage asynchronous motors considering slotting and saturation

作　　者：王荀[1] 邱阿瑞[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,电力系统及大型发电设备控制和仿真国家重点实验室,北京100084

出　　处：《清华大学学报（自然科学版）》2011年第3期377-381,共5页Journal of Tsinghua University(Science and Technology)

摘　　要：为了在设计阶段降低异步电动机电磁振动噪声,有必要计算气隙磁通密度谐波。该文提出了考虑开槽和饱和时鼠笼异步电动机电流谐波和气隙磁通密度谐波的解析计算方法。建立求解稳态电流谐波的数学模型,再由电流求出总磁动势和气隙磁通密度谐波。电流谐波与磁通密度谐波之间的相互依赖关系可利用多次求解来处理。与实测结果和有限元法计算结果的比较验证了该方法的有效性。该解析法可应用于气隙磁通密度谐波的快速计算,尤其对于中大型异步电动机有重要的实用价值。To reduce electromagnetic vibrations and noise in asynchronous motors in the design stage,the harmonic air gap flux density is analyzed.This paper presents an analytical method to calculate the harmonic current and harmonic air gap flux density in squirrel-cage asynchronous motors with consideration of the slotting and saturation.The total magnetic motive force（MMF） and harmonic air gap flux density are calculated from harmonic currents.Iterations are used to deal with the interdependence between harmonic current and the harmonic flux density.The analytical results compare well with experimental data and the finite element results.Thus,this analytical method can be used to quickly calculate the harmonic air gap flux density,especially for medium and large sized asynchronous motors.

关 键 词：鼠笼异步电动机 磁通密度谐波 电流谐波 饱和 

分 类 号：TM343.3[电气工程—电机]