线性压缩机电磁场仿真与磁轭结构参数优化

电磁系统是影响线性压缩机效率的关键,以一种动磁式线性压缩机的E型电磁结构为研究对象,首先推导了等效磁路方程和电磁力表达式,然后采用有限元软件建立了电磁系统仿真模型,分析了磁通密度和磁力线分布状态,求得了不同电流、位移下的电磁力变化规律,并通过实验对电磁力表达式和有限元模型进行了验证,证明了有限元模型的准确性,在此基础上,对磁轭的结构参数进行了优化,研究结果对提高线性压缩机效率具有实际价值。

Simulation About Electromagnetic Field of Linear Compressor and Optimization About Yoke Structural Parameters

The electromagnetic system is the key to the efficiency of linear compressors,and this paper takes the E-type electromagnetic structure of a moving magnetic linear compressor as the research object.First of all,the equivalent magnetic circuit equation and electromagnetic force expression are derived.Then the finite element software is used to establish the electromagnetic system simulation model.The magnetic flux density and magnetic field distribution are analyzed,and the electromagnetic force’s changes law under different currents and displacements are obtained.The electromagnetic force expression and finite element model are verified by experiments,which proves the accuracy of the finite element model.The structural parameters of permanent yoke are optimized,and the research results have practical value for improving the efficiency of linear compressors by the experiments.