Hierarchical Coordinated Control Method of In-Wheel Motor Drive Electric Vehicle Based on Energy Optimization

Junchang Wang,Junmin Li

doi:10.3390/wevj10020015

Abstract

In order to improve the endurance mileage and stability of an electric vehicle at the same time, a hierarchical coordinated control method of an in-wheel motor drive electric vehicle based on energy optimization is presented in this paper. The driving architecture of an in-wheel motor drive electric vehicle is developed, and a corresponding simulation model is established in CarSim software; then, the bicycle model of an electric vehicle is derived from vehicle dynamic equations. The energy-saving feasibility of an in-wheel motor drive electric vehicle is analyzed by a motor efficiency map, and on the basis of this, the hierarchical coordinated control method is proposed to achieve the simultaneous energy optimization control and stability control of the electric vehicle. The results show that the energy consumption is decreased by 32.41%, 45.92%, and 4.07% in different simulation manoeuver cases, and the vehicle stability can be ensured by the proposed control method.

Highlights

With the rapid development of automobile industry technology and the improvement of people’s living standards, the production capacity, sales, and per-capita share of the automobile market are increasing year by year [1,2,3]
Hierarchical Coordinated Control Method Based on Energy Optimization angle of the front wheel is directly fed into the electric vehicle, and the required additional yaw
One can find that the demanded torque in case study 2 is relatively larger than that of case study 1, due to the acceleration manoeuver, which means that the result of the optimal torque allocation is more inclined to four-wheel allocation in coordinated control, so as to reduce the load torque of each single motor, and thereby improving the driving efficiency of the in-wheel motor

Summary

Introduction

With the rapid development of automobile industry technology and the improvement of people’s living standards, the production capacity, sales, and per-capita share of the automobile market are increasing year by year [1,2,3]. In today’s world, economic development and scientific and technological progress are undeniable mainstream value requirements and social development trends, but at the same time, the shortage of energy and environmental pollution problems are a point they can never ignore. With the aggravation of the global greenhouse effect, public opinion around the world has given more stringent expectations and standards on how to reduce vehicle emissions. How to break through the restrictions of energy shortage and environmental pollution, and how to mitigate the increasingly severe greenhouse effect, has become one of the key issues that cannot be ignored in the automotive industry [4,5,6]. The most prominent advantage of electric vehicles is that they can reduce emissions or even achieve zero emissions [7,8,9]. The electricity that they need is renewable energy

Methods

Results

Conclusion