Vibration Control for Electric Vehicles With In-Wheel Switched Reluctance Motor Drive System

Abstract

The in-wheel switched reluctance motor (IWSRM) has significant potential for utilization in electric vehicle (EV) because of its inherent advantages such as low cost, robustness, wide speed range, and direct drive mode. However, the unbalanced radial force caused by eccentricity of IWSRM results in increasing vehicle vibration and decreasing riding comfort. In this paper, various vertical vibration control strategies for IWSRM are proposed and compared to improve the vibratory behavior of vehicle. First, effects of eccentricity ratio and eccentric angle on radial force, torque, and inductance are investigated by numerical analysis method for IWSRM. Then, IWSRM model, vehicle model, and suspension model are developed, based on which two common control algorithms (i.e. CCC and PWM) are provided and used as benchmarks to compare with the newly proposed two (i.e. CCC-F and PWM-F). They are designed by introducing the vehicle vertical acceleration as an extra control objective. Finally, the dynamic response of four control strategies are analyzed and the comparison results show that each of them performs differently under different driving conditions. As a result, a switchable controller based on the proposed control algorithms is presented to improve the overall performance of the IWSRM for EVs under various driving modes.

Fuzzy logic and proportional integral derivative based multi-objective optimization of active suspension system of a 4×4 in-wheel motor driven electrical vehicle

“…Compared to IWMs, EVs with centralized propulsion have the advantage of longer motor lifespan due to lower motor vibration, higher comfort, and better road handling due to lower unsprung mass (Liu et al, 2017). Although centralized propulsion systems have these advantages, IWM propulsion systems extensively researched owing to their native advantages such as simplicity, efficiency, swift and accurate torque generation without adverse effects on drive-shaft, ease of X by wire implementation, enhancing electronic stability control (ESC) system, traction control system (TCS), and anti-lock brake systems’ (ABS) performance (Murata 2012; Zhu et al, 2020). While IWMs have many upsides, some significant disadvantages prevent them from being used in production cars, such as an increase in the wheel’s mass leads to decreased comfort and road-holding abilities.…”

Improved LQG vibration control for multiple inputs of electric vehicle

“…There are two methods to suppress and control vibration: passive control and active control. 16,17 Traditional passive suspension can not give consideration to ride comfort and handling stability. If the suspension stiffness is lowered, the acceleration of vehicle body will be reduced, and the comfort of vehicle can be changed, but the displacement of vehicle body will increase, which will easily lead to lateral sliding, jumping, and poor grip ability, which will affect the driving safety.…”

Torque Ripple Online Optimization of Switched Reluctance Motor Based on Torque Slope Characteristics

“…Switched reluctance motor (SRM) has drawn growing attention in the industry in recent decades due to its simple structure, low cost, high reliability, and wide speed range [1][2][3]. However, due to its unique doubly salient structure and discrete mechanical conduction mechanism, its electromechanical conversion mode is highly nonlinear, and its control mode is significantly different from the traditional motor [4][5][6].…”