中频感应加热场路耦合的研究

发布时间：2018-06-15 01:10

本文选题：感应加热 + 数值模拟　；参考：《河北工业大学》2015年硕士论文

【摘要】：随着工业生产要求的提高,金属零件的性能和可靠性日益成为人们越来越关注的因素,而金属零件的性能指标和质量除了材料成分特性外,更与其加热技术密切相关。目前感应加热在金属零件的加工和热处理等方面得到了广泛的应用,因为其具有加热效率高,控制方便等优点。感应加热技术的发展离不开感应加热理论的完善和感应加热装置的优化,以及对加热过程的深入研究,感应加热理论一直在不断向前发展,趋于完善,而感应加热装置的优化离不开对于感应加热过程的研究,本文是在感应加热有关原理的基础上,利用有限元法,实现了感应加热的数值模拟,完成了对感应加热器和工件的电磁场-涡流场-温度场的耦合分析,通过ANSYS和ANSOFT有限元分析软件,得到了在不同大小和不同频率激励作用下,工件上的温度分布以及涡流分布,同时得到了不同加热参数对于加热结果的影响,进一步计算出工件在不同温度下的等效参数,即感应加热电源负载支路的等效电感和等效电阻。在分析了以上感应加热参数对模拟结果的影响后,得到了具有工程参考价值的结论,一方面为合理选择加热参数提供了理论依据,另一方面还对合理选择感应加热电源的功率和频率,以及对于其设计和优化提供了实际的指导,感应加热电源性能的好坏直接决定了加热结果的理想化程度,感应加热等效负载是一个感性负载,为了抵消无功的影响,需要给负载支路添加补偿电容,提高电源的利用率,同时要求电源工作在感性小失谐状态,这样一来可以保证电源向负载输出最大有功功率,二来可以使功率开关器件工作在软开关状态,减小器件损耗。感应加热电源的设计离不开功率调节和负载频率跟踪两个环节,选择合适的调功方式,以及对锁相环技术的进一步改进将会极大地提高电源的能指标。
[Abstract]:With the improvement of industrial production requirements, the performance and reliability of metal parts have become more and more important factors, and the performance and quality of metal parts are closely related to the heating technology in addition to the material composition characteristics. At present, induction heating has been widely used in metal parts processing and heat treatment, because of its high heating efficiency, easy control and so on. The development of induction heating technology can not be separated from the perfection of induction heating theory and the optimization of induction heating device, as well as the deep research on the heating process. The optimization of induction heating device is inseparable from the study of induction heating process. In this paper, based on the principle of induction heating, the numerical simulation of induction heating is realized by using finite element method. The coupling analysis of electromagnetic field, eddy current field and temperature field of induction heater and workpiece is completed. Through ANSYS and ANSOFT finite element analysis software, the temperature distribution and eddy current distribution on the workpiece under different excitations of different sizes and frequencies are obtained. At the same time, the influence of different heating parameters on the heating results is obtained, and the equivalent parameters of the workpiece at different temperatures, namely, the equivalent inductance and the equivalent resistance of the load branch of the induction heating power supply, are further calculated. After analyzing the influence of the above induction heating parameters on the simulation results, a conclusion with engineering reference value is obtained. On the one hand, it provides a theoretical basis for the rational selection of heating parameters. On the other hand, it also provides practical guidance for the rational selection of power and frequency of induction heating power supply, as well as for its design and optimization. The performance of induction heating power supply directly determines the degree of idealization of heating results. The equivalent load of induction heating is an inductive load. In order to counteract the influence of reactive power, it is necessary to add compensating capacitance to the load branch to improve the utilization of power supply, and at the same time, require the power supply to work in the state of inductive small detuning. In this way, the power supply can output the maximum active power to the load, and the power switch device can work in the soft switching state and reduce the device loss. The design of induction heating power supply can not be separated from two links: power regulation and load frequency tracking. Choosing the appropriate power regulation mode and further improving the phase-locked loop technology will greatly improve the energy index of the power supply.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM924.01

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