| Title |
Comparative study of electromagnetic and NVH characteristics of permanent magnet synchronous motors according to pole/slot combinations |
| Authors |
이영근(Young-Keun Lee) ; 방태경(Tae-Kyoung Bang) ; 조성태(Seong-Tae Jo) ; 김수민(Su-Min Kim) ; 이정인(Jeong-In Lee) ; 이훈기(Hoon-Ki Lee) ; 신경훈(Kyung-Hun Shin) ; 최장영(Jang-Young Choi) |
| DOI |
https://doi.org/10.5370/KIEE.2022.71.11.1591 |
| Keywords |
Fractional-slot concentrating winding; electromagnetic noise source; structural-acoustic analysis; permanent magnet motors |
| Abstract |
In this paper, electromagnetic noise sources of permanent magnet synchronous motors with 8-pole 9-slot and 12-slot fractional slot concentrated windings were analyzed through finite element analysis, and the radiated noise/vibration levels were compared through structural-acoustic analysis. Electromagnetic noise sources are classified into cogging torque, torque ripple, magnetic pull force, and unbalanced magnetic force, and the main values of electromagnetic excitation forces are different according to the pole/slot combination. In particular, the effect of electromagnetic noise sources on vibration/noise was analyzed in the frequency domain through the electromagnetic-mechanical coupling analysis. The noise level according to the speed was compared with the noise characteristics for each frequency using the waterfall diagram. |