基于传热反问题的异步电机定子温升分析

分析和研究电机的热模型对电机设计和运行中的维护都是十分重要的。建立了异步电机定子绕组温升的红外检测传热反问题三维计算模型，通过使用红外手段测量电机表面若干离散点的温度，然后利用导热反问题中的L-M方法可以确定定子铁心内部各部分的温升情况，从而判断电机的运行温升是否正常。计算结果对测量误差具有较好的抗干扰性。当测量误差达到0．2℃时，绕组平均温度的计算误差仅为1．82％。

Temperature Rise Estimation in Squirrel-Cage Induction Motor Based on Inverse Heat Conduction Analysis

Thermal study is essent ial for induction motor. s desig n and maintenance. T he 3D inv erse heat tr ansfer calculatio n model o f squirre-l cag e induction motor is presented. T hr oug h inspect ing motor. s exter io r temperature rise by infr ar ed thermal inst rument, the model can g ive it s inner temperatur e r ise by L-M inverse conduct ion analysis method. T his can be used to judg e w hether the mo to r is running w ell. With litt le err ors of measurements, the calculat io n result s can sat isfy eng ineering need w el l. When measurement er rors reach 0. 2 e , the computing er ror of stator w indings is only 1. 82%