钢板高频感应加热过程电磁-热耦合场分析

Analyses of electromagnetic-thermal coupling field for high frequency induction heating process of steel plate

研究静止式钢板感应加热,基于COMSOL Multi-Physics软件开发了二维电磁热耦合数值模型,温度计算结果与实验结果吻合;并分析了感应加热过程中钢板的电磁场分布规律和温度场分布规律.感应器加装导磁体后使涡流产生的焦耳热集中分布于感应器正下方,提高了加热效率.最后,研究了感应加热工艺参数对温度的影响,即在其他加热参数相同的情况下,感应器加载电流、电流频率越高,钢板加热速度越快;感应器与钢板间距越大,钢板加热速度越慢.

Static induction heating of steel plate is studied, 2D numerical model of electromagnetic- thermal coupling is developed by COMSOL Multi-Physics software, and the numerical results of temperature agree with experimental data. Distributions of electromagnetic field and temperature field in the heating process of the steel plate are studied. After the inductor has been fitted with a magnetizer, the Joule heat generated by eddy currents is converged under the inductor, and the heat efficiency is improved. Finally, the influences of the process parameters of induction heating on temperature are studied, and the experimental results show that, under the conditions that the other parameters remain unchanged, the higher the current of the inductor and the current frequency are, the faster the plate is heated, and the bigger the gap between the inductor and the plate is, the slower the plate is heated.