Characteristic Analysis and Experimental Verification of Electromagnetic and Vibration/Noise Aspects of Fractional-Slot Concentrated Winding IPMSMs of e-Bike

Young-Geun Lee, Tae-Kyoung Bang, Jeong-In Lee, Jong-Hyeon Woo, Sung-Tae Jo and Jang-Young Choi
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Young-Geun Lee: Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Korea
Tae-Kyoung Bang: Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Korea
Jeong-In Lee: Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Korea
Jong-Hyeon Woo: Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Korea
Sung-Tae Jo: Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Korea
Jang-Young Choi: Department of Electrical Engineering, Chungnam National University, Daejeon 34134, Korea

Energies, 2021, vol. 15, issue 1, 1-15

Abstract: In this study, we performed the electromagnetic and mechanical characteristic analyses of an 8-pole 12-slot interior permanent magnet synchronous motor (IPMSM). Permanent magnet synchronous motors are classified into surface permanent magnet synchronous motor and interior permanent magnet synchronous motors according to the type of rotor. The IPM type is advantageous for high-speed operation because of the structure where the permanent magnet is embedded inside the rotor, and it has the advantage of having a high output density by generating not only the magnetic torque of the permanent magnet, but also the reluctance torque. However, such a motor has more vibration/noise sources than other types, owing to changes in reluctance. The sources of motor noise/vibration can be broadly classified into electromagnetic, mechanical, and aerodynamic sources. Electromagnetic noise sources are classified into electromagnetic excitation sources, torque pulsations, and unbalanced magnetic forces (UMFs). Vibration and noise cause machine malfunctions and affect the entire system. Therefore, it is important to analyze the electromagnetic vibration source. In this study, the electromagnetic characteristics of an IPMSM were analyzed through the finite element method to derive the UMF. Vibration and noise analyses were performed by electromagnetic–mechanical coupling analysis, and vibration and noise characteristics based on electromagnetic noise sources were analyzed.

Keywords: IPMSMs; electromagnetic characteristic; vibration/noise source; electromagnetic–mechanical coupled analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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