磁场能量有限元法在电机参数计算中的应用

绕组的自感和互感参数计算是建立电机数学模型的基础,在很大程度上决定了电机性能计算的准确性。现有的电机绕组电感计算方法大多忽略了磁路饱和的影响,而且没有考虑定、转子齿槽以及气隙不均匀或不对称对电机参数的影响。电机磁场的有限元数值解法(包括其他数值解法)为电机的参数计算提供了一种更为准确的方法。本文介绍了一种建立在磁场能量摄动法基础上的电感参数有限元计算法。该法不受电机类型和绕组、气隙结构的限制,通用性强,准确程度高,可用于分析具有各种绕组或气隙结构的特种电机的参数和性能。文中给出了用该法计算一台六相方波电机电感参数的应用实例,并给出了电机参数计算值与实测结果的比较。

The Application of Magnetic Energy Perturbation Finite Element Method in the Parameter Calculation of Electrical Machines

The determination of self and mutual inductance parameters is the base to set up the mathematic model of a electrical macbins. The influences of magnetic saturation, slots of stator and rotor, and non-uniformity or asymmetry of airgap on the machine parameters are not taken into account in the most of methods to calculate inductances. A more accurate method, the Finite Element Method based on the magnetic energy perturbation is introduced in this paper. It can be used to determine winding inductances for all kinds of electrical machines without any limitation of winding or airgap structures. A practical example of Using this method to calculate the inductances for a six phase square wave machine is presented in the paper.