Conference: 2025 25th International Conference on the Computation of Electromagnetic Fields (COMPUMAG)
Authors: Jin-Ho Choi, Ji-Hyeon Lee, Du-Ha Park, Seong-Hyeon Kim, Myung-Seop Lim
DOI:
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. Conventional loss calculation method of LOA includes DC copper loss and iron loss. This paper briefly introduces the conventional 2D FEA method that corrects the results from 2D axisymmetric FEA. This paper also proposes a loss calculation method containing additional effects, core anisotropy and AC copper loss, on total loss of LOA. Methods to include effects in FEA are introduced. Each method was compared in terms of computational time and analysis results for both 2D and 3D FEA. Finally, the total loss error and computation time of conventional method and proposed method are compared.