[논문]Analytical Study and Comparison of Electromagnetic Characteristics of 8-Pole 9-Slot and 8-Pole 12-Slot Permanent Magnet Synchronous Machines Considering Rotor Eccentricity

Lee, Hoon-Ki; Bang, Tae-Kyoung; Lee, Jeong-In; Woo, Jong-Hyeon; Shin, Hyo-Seob; Yoon, Ick-Jae; Choi, Jang-Young

doi:10.3390/electronics10162036

[해외논문] Analytical Study and Comparison of Electromagnetic Characteristics of 8-Pole 9-Slot and 8-Pole 12-Slot Permanent Magnet Synchronous Machines Considering Rotor Eccentricity 원문보기

Electronics, v.10 no.16, 2021년, pp.2036 -

Lee, Hoon-Ki (Department of Electrical Engineering, ChungNam National University, Daejeon 34134, Korea) , Bang, Tae-Kyoung (Department of Electrical Engineering, ChungNam National University, Daejeon 34134, Korea) , Lee, Jeong-In (Department of Electrical Engineering, ChungNam National University, Daejeon 34134, Korea) , Woo, Jong-Hyeon (Department of Electrical Engineering, ChungNam National University, Daejeon 34134, Korea) , Shin, Hyo-Seob (Department of Electrical Engineering, ChungNam National University, Daejeon 34134, Korea) , Yoon, Ick-Jae (Department of Electrical Engineering, ChungNam National University, Daejeon 34134, Korea) , Choi, Jang-Young (Department of Electrical Engineering, ChungNam National University, Daejeon 34134, Korea)

Abstract ▼ AI-Helper

In this study, a magnetic field is analyzed using an analytical method and compared with the electromagnetic characteristics of 8-pole 9-slot and 8-pole 12-slot permanent magnet synchronous machines considering rotor eccentricity. The magnetic flux density and back electromotive force (EMF) are derived using perturbation theory and electromagnetic theory. First, the Fourier modeling of a permanent magnet is performed through magnetization modeling, and two analysis regions are set based on several assumptions for applying the analytical method. Accordingly, the governing equations of the analysis regions are derived in the form of Poisson and Laplace equations. In addition, the undefined coefficients of the general solutions are calculated through general solutions and appropriate boundary conditions, and the magnetic flux density and back EMF of the air gap region are derived based on the definition of the magnetic vector potential. The results obtained using the analytical method are compared with the finite element method and experimental results. In addition, we perform a torque analysis considering rotor eccentricity and analyze the torque ripple based on rotor eccentricity for two cases involving the pole/slot combination.

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