TY - JOUR N2 - The distortion of air gap magnetic field caused by the rotor eccentricity contributes to the electromechanical coupling vibration of the brushless DC (BLDC) permanent magnet in-wheel motor (PMIWM) in electric vehicles (EV). The comfort of the BLDC in-wheel motor drive (IWMD) EV is seriously affected. To deeply investigate the electromechanical coupling vibration of the PMIWM under air gap eccentricity, the PMIWM, tyre and road excitation are analyzed first. The influence of air gap eccentricity on air gap magnetic density is investigated. The coupling law of the air gap and the unbalanced magnetic force (UMF) is studied. The coupling characteristics of eccentricity rate, air gap magnetic density, UMF, phase current and vibration acceleration are verified on the test bench in the laboratory. The mechanism of the electromechanical coupling vibration of the BLDC PMIWM under air gap static eccentricity (SE), dynamic eccentricity (DE) and hybrid eccentricity (HE) is revealed. DE and HE deteriorate the vibration acceleration amplitude, which contributes the electromechanical coupling vibration of the PMIWM. The research results provide a solid foundation for the vibration and noise suppression of the PMIWM in distributed drive EV. L1 - http://czasopisma.pan.pl/Content/114307/PDF/02_851-862_01249_Bpast.No.67-5_03.02.20.pdf L2 - http://czasopisma.pan.pl/Content/114307 PY - 2019 EP - 862 DO - 10.24425/bpasts.2019.130882 KW - BLDC in-wheel motor KW - rotor eccentricity KW - unbalanced magnetic force KW - electric vehicle KW - electromechanical coupling vibrat A1 - Li, Y. A1 - Wu, H. A1 - Xu, X. A1 - Cai, Y. A1 - Sun, X. VL - No. 5 DA - 31.10.2019 T1 - Analysis on electromechanical coupling vibration characteristics of in-wheel motor in electric vehicles considering air gap eccentricity SP - 851 UR - http://czasopisma.pan.pl/dlibra/publication/edition/114307 T2 - Bulletin of the Polish Academy of Sciences Technical Sciences ER -