Abstract：In this paper, an accurate sub-domain analytical model of the electric shaker was established in the two-dimensional Cartesian coordinate system. The solution areas were divided into the excitation coil area, the driving coil area and the air gap area. The general formulas based on Fourier theory were used to give the general solution of the magnetic induction intensity of each subdomain. The unknown coefficients in the general solution were determined by the boundary conditions between the subdomains, so as to realize the magnetic field analysis of the electric shaker. Taking a certain large-scale electric shaker as an example, the magnetic density analytical calculation results of air gap were compared with the two-dimensional finite element calculation results, and the accuracy of the analytical model was verified. Finally, on the basis of the static magnetic field analysis results, considering the displacement change of the driving coil, the electromagnetic force formula was used to calculate the nonlinear electromagnetic force with the displacement. It is concluded that the influence of the load magnetic field on the original excitation magnetic field makes the non-uniformity of the magnetic density distribution in the air gap, which causes nonlinear electromagnetic force of the driving coil during the motion.
左曙光, 黄荣奎, 冯朝阳, 胡坤. 考虑驱动线圈位移变化的电动振动台非线性电磁力建模与分析[J]. 电工技术学报, 2019, 34(21): 4441-4448.
Zuo Shuguang, Huang Rongkui, Feng Zhaoyang, Hu Kun. Modeling and Analysis of Nonlinear Electromagnetic Force of Electric Shaker Considering Displacement Change of Driving Coil. Transactions of China Electrotechnical Society, 2019, 34(21): 4441-4448.
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2019, Vol. 34 
