Analyze for Vertical Vibration of the In-Wheel Motor Electric Vehicle Based on Power Flow Method

Abstract

The vertical vibration of the in-wheel motor electric vehicle (IWM-EV) induced by large unsprung mass is analyzed based on power flow method. The simulation results show that due to the unsprung mass increase of IWM-EV, energy consumption of the suspension and wheel is increasing, which will cause adverse effects on not just the ride comfort but the maneuver stability. To decrease the effect, a new kind of vibration mitigation measure of the vehicle body absorber combined with an active hybrid control integrated the sky-hook and ground-hook methods is developed. The effectiveness of this measure is verified.

Design and Simulation of Two Stage Reduction Wheel-Edge Drive System

“…Wheel-edge driving system can directly or indirectly control wheel via a reducer, enjoying advantages such as simple structure and high transfer efficiency; Moreover, automobile with such system has a significantly reduced mass and more complex arrangement. However due to the introduction of motor and reducer, the unsprung mass will be significant increased, making certain impact to comfort of vehicle [3,4]. This paper proposed a design scheme called two stage reduction wheel-edge driving system integrating high-speed motor and reducer, and established 1/4 vertical vibration model based on such scheme.…”