Equivalent circuit model of microwave heating system based on field circuit combination

被引：0
|
作者：
Yang B. [1 ,2 ,3 ]
Su S. [1 ]
Ma Y. [1 ]
Ni R. [1 ]
Zeng D. [1 ]
Xiao Q. [1 ]
Wang Y. [1 ]
机构：
[1] Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming
[2] Yunnan Key Laboratory of Artificial Intelligence, Kunming University of Science and Technology, Kunming
[3] Key Laboratory of Unconventional Metallurgy of Ministry of Education, Kunming University of Science and Technology, Kunming
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2023年 / 54卷 / 09期
基金：
中国国家自然科学基金;
关键词：
equivalent circuit model; field-circuit combination; microwave heating; microwave network theory; multiphysics coupling;
D O I：
10.11817/j.issn.1672-7207.2023.09.027
中图分类号：
学科分类号：
摘要：
The dynamic response process between microwave and heated medium in the process of microwave heating was studied. Solving the electromagnetic-thermal coupling multi-physics field equations is complex and time-consuming when analyzing the dynamic process of microwave heating. An equivalent circuit analysis method was proposed for microwave heating based on "field-circuit combination". Firstly, qualitative analysis was conducted on the impedance characteristics of the heating medium, cavity wall, and microwave feed inlet dielectric sheet during microwave transmission. Circuit components with the same impedance characteristics were used to equivalent the impedance effects of various media during microwave transmission. An equivalent circuit model of the microwave heating system was established. Secondly, the full wave field analysis method was used to analyze the absorption, reflection, and transmission of electromagnetic waves by media, cavity walls, and microwave feed inlet dielectric plates. The changes in microwave electromagnetic fields were quantitatively represented by scattering parameters. Thirdly, the scattering parameters obtained from quantitative analysis were converted into equivalent circuit impedance parameters through parameter transformation, which were substituted into the equivalent circuit model to improve the accuracy of the calculation of the equivalent circuit model. Finally, the electric field intensity of the heating medium in the microwave application was obtained through equivalent circuit calculation. The microwave power dissipated by the medium was obtained to calculate the heating temperature of the medium. The results show that the field circuit combination method for calculating the heating temperature of microwave media ensures calculation accuracy, and takes half of the calculation time of the finite element method, reflecting the superiority of the field circuit combination method. For microwave heating media under different conditions, the accuracy of the field circuit combination solution is over 96%, verifying the feasibility and effectiveness of the proposed field circuit combination method for solving microwave heating problems. © 2023 Central South University of Technology. All rights reserved.
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页码：3676 / 3687
页数：11
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