一种永磁式感应热机的损耗及传热分析  

Analysis of eddy-current loss and heat transfer for permanent magnet induction heating device

作　　者：杜海[1] 蔡春伟[1] 曲延滨[1] 张鹏[1] 

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150001

出　　处：《电机与控制学报》2014年第12期31-36,43,共7页Electric Machines and Control

基　　金：国际科技合作项目(2008DFR60340);国家自然科学基金(51207031;51177022);山东省优秀中青年科学家科研奖励基金(BS2011NJ002);中国博士后科学基金(2013M541368)

摘　　要：为了能够准确快速的估算永磁式感应热机的热功率大小,针对该热机的结构特点,为其建立定子导体的涡流损耗解析模型。该解析模型基于库伦定律、洛伦兹力定律等基本电磁场理论,以热功率与转速关系为设计目标,给出设计参数与设计目标之间的明确关系,并在分析过程中考虑了趋肤效应的影响,增加其适用的转速范围。以定子涡流损耗为热源,根据热机内流体流动与传热的特点,建立了定子传热管道系统的三维流场与温度场的物理模型和数学模型,采用有限体积法准确的计算出定子传热管道系统的流场速度及温度分布。涡流损耗解析模型估算结果与有限元计算结果对比,证实该解析模型能够快速并准确的预测出低转速范围内热功率随转速变化的关系。热机的涡流损耗计算与传热分析可为其结构设计及优化提供重要参考与依据。In order to estimate the thermal power of a permanent magnet induction heating device quickly and accurately,an analytical model of eddy-current loss of the stator was established,according to structure characteristics. The relationship between eddy-current loss and speed was given based on the Coulomb＇s law and the Lorentz force law. The skin effect was considered in the process of analysis,which extended the applicable speed range of the model. The eddy-current loss of the stator is the heat source of the device. Then,the mathematical and physical model of 3-D fluid and temperature field inside the tube heat exchange system were established,according to the characteristics of fluid-flow and heat-transfer,which numerically calculated using finite volume method（ FVM）. The analytical solution was compared with the finite element analysis results,indicating a good agreement in low-speed range. The analysis of eddy-current loss and heat transfer provides important reference for the design and optimization of the device.

关 键 词：有限元分析 涡流损耗 有限体积法 三维流体场 三维温度场 

分 类 号：TM502[电气工程—电器]