Conference: The 37th International Electric Vehicle Symposium & Exhibition (EVS37)
Authors: Byeong-Cheol Bae, Jae-Hyeon Kim, Myung-Seop Lim
DOI:
In-wheel motor (IWM) has high efficiency due to their direct drive system but is sensitive to vibration and noise characteristics. The combination of poles and slots on the motor is the most significant factor affecting vibration. Therefore, this paper analyzed and compared the vibration characteristics of 40 ploe/48-slot and 44-pole-48slot IWMs. First, cogging torque and torque ripple, the vibrational components of tangential force, were compared. The harmonic analysis of the radial force obtained through the Maxwell stress tensor was performed. Then, the lowest spatial order of the radial force, which affects the most significant vibration, was analyzed.