Journal: IEEE Transactions on Energy Conversion
Authors: Jin-Ho Choi, Ji-Hyeon Lee, Du-Ha Park, Seong-Hyeon Kim, Jae-Hoon Jeong, Myung-Seop Lim
DOI: 10.1109/TEC.2026.3695316
The linear oscillating actuator (LOA) operates as the driving mechanism for linear compressor, which shows high power density and efficiency. To ensure the high efficiency of linear compressor, it is important to accurately calculate the loss of LOA. Due to the complex structure of LOA with segmented outer core and permanent magnet, normally, 3D finite element analysis (FEA) was executed to accurately analyze the loss of LOA. However, since 3D FEA requires significant computational time, 2D FEA is sometimes employed by simplifying the 3D model of the LOA into an equivalent 2D model, even at the cost of some accuracy, to reduce analysis time. This paper briefly introduces the correction factor that corrects the results from 2D axisymmetric FEA and implies limitations. This paper introduces additional losses, core anisotropy and AC copper loss and proposes a comprehensive loss analysis method that combines two approaches: the iron loss calculation for anisotropic materials and the AC copper loss correction in 2D FEA. Each method's validity was confirmed by comparing loss with 2D and 3D FEA. Finally, the total loss and computational cost between 2D FEA, 3D FEA, the proposed method and experiment were compared.