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Wang, Yi Duan; Yang, Guo Lai; Tang, Enling; Wu, Qing Le
Journal of magnetism and magnetic materials, 06/2024, Volume: 600Journal Article
•Appling ECB to recoil machine of artillery.•The analytical electromagnetic model is established by multilayer theory to derive the heat source of this ECB.•The 2D-numerous model is established by FD method and coupled with source method.•The working characteristic of this ECB under intense impact load considering temperature is analyzed. With the increasing requirements for safety and reliability, it is now necessary to analyze the thermal characteristics to the same extent as the electromagnetic design for eddy current brakes(ECB), because the working characteristic will be greatly influenced by temperature. In this paper, the transient thermal-magnetic coupling analysis of permanent magnet cylindrical eddy current brake, which is used as the recoil mechanism in artillery, is presented. First, the structure and working principle of this ECB are described in detail. Second, the analytical electromagnetic model is established by multilayer theory to derive the heat source of this ECB. Thirdly, the thermal-magnetic coupling model is established to calculate the dynamic inhomogeneous temperature field of the ECB. The heat conduction equation is solved in different regions with inhomogeneous internal heat source by Finite Difference method(FDM) in two-dimensional cylindrical coordinate. Finally, the validity of the proposed model is verified by commercial Finite Element software. The thermal characteristic and its effects on braking force is analyzed during working. The maximum value of temperature approximately rises by 16℃ in each firing. The braking force will decline by 8% considering temperature.
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