一种永磁同步平面电机瞬态温度场研究

Transient Temperature Feild Study of a Permanent Magnet Synchronous Planar Motor

本文采用二维热阻网络模型对平面电机的瞬态温度场进行了分析。该模型建立在等效热路法的基础上,利用Laplace变换/逆变换计算得到电机二维温度分布的解析解。通过改变电机各绕组电流的大小和加载方式,模拟了各线圈的瞬态温度场的变化。对用该模型获得的计算结果同数值有限元仿真软件获得的进行了比较,两者具有很好的一致性,验证了模型的有效性。该模型可以有效预测电机平面内分布热源温度的变化规律,并指导平面电机设计及温度控制。

In this work,the transient temperature distribution of a permanent magnet synchronous planar motor is simulated by a two-dimensional thermal resistance network model based on the equivalent thermal circuit method.The real time temperature distribution of the planar motor is obtained through Laplace and Inverse-Laplace transformation of the model.By varying the way that the current is applied on each coil winding the transient temperature field is obtained.The results are compared with the numerical finite element simulations.The analytical and numerical simulations show good agreement indicating the validity of the proposed model.This model is proved to be effective in predicting the temperature variation of planar motor and can instruct the design and temperature control of magnet planar motors.