This paper focused on the coil-embedded electromagnetic induction hot pressing roller.Drawing upon electromagnetic field theory and temperature field theory,a structure was devised to enhance its temperature uniformity.A squirrel-cage sleeve was installed on the inner wall of the roller to disperse the heat source and mitigate the influence on the generation of eddy currents.The comprehensive thermal conductivity of the roller body was enhanced by inserting heat-conductive copper strips into the roller body,thereby reducing the temperature difference between the roller ends and the central area.The non-uniformly wound coil was utilized to alter the position of the heat source,thereby enhancing the temperature uniformity in the central area of the roller.Finally,Maxwell and Ansys Transient Thermal were employed for simulation analysis to verify the nearly absence of eddy current generation on the squirrel-cage sleeve.The temperature difference in the roller surface central area is≤1.58℃,and the temperature difference in the overall heated area is<25℃.In comparison to the pre-optimized state,there is a substantial decrease of 146.22℃in the overall temperature difference,signifying a noteworthy optimization effect.This has significant implications for practical applications and relevant technical investigations.
关键词
电磁感应加热/有限元仿真/温度优化设计/电磁场理论/磁热双向耦合
Key words
Electromagnetic Induction Heating/Finite Element Simulation/Temperature Optimization Design/Electromagnetic Field Theory/Electromagnetic-Thermal Two-way Coupling
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