Affiliations: [a] Department of Electrical Engineering, Dong-A
University, Busan, Korea | [b] Gamchunhangro Saha-Gu Busan, DEMCO co., Ltd, Busan,
Korea | Université Laval, Canada | Tohoku University, Japan
Correspondence:
[*]
Corresponding author: Yunhyun Cho, Department of Electrical
Engineering, Dong-A University 37, Nakdong-Daero, 550 Beon-Gil, Saha-Gu, Busan,
Korea. E-mail: yhcho@dau.ac.kr
Abstract: The axial flux permanent magnet (AFPM) machine is widely used in
many applications due to its advantages. But the conventional AFPM machine has
the major problem such as the deformation and unbalanced air gap occurred
because of the large magnetic attraction force between the rotor and the
stator. For these problems, the magnetic attraction force must be accuractly
calculated in the process of the design step of the mechanical parts. Thus,
this paper proposes the analysis method to compute the magnetic attraction
force of AFPM machine considering a unbalanced rotor structure. The quasi 3D
model with a different air gap condition is introduced to analyze the magnetic
flux density and the magnetic attraction force due to the eccentricity of rotor
structure. To validate the proposed analysis process with the quasi 3D model,
3D FEM analysis is performed to compare the results. As results, the proposed
analysis results was obtained the similar results to 3D FEM analysis results.
The proposed method is applied and estimated to the 130 kW AFPM generator.
Keywords: Axial flux permanent magnet machine (AFPM), magnetic attraction force, 3D quasi model, FEM analysis
