电动汽车电子差速控制策略研究

Research on Electronic Differential Control Strategy of Electric Vehicle

轮毂电机相较于传统电机,具有响应速度快、能量转化率高等优点。为了保证电动汽车的安全性,使用轮毂电机驱动的汽车去掉了变速器等机械结构。本文使用仿真MATLAB软件建立动力学模型来进行汽车的差速研究。并且使用CARSIM软件进行汽车参数的建模,使得到的实验结果尽可能准确。然后使用PID调节器控制电流,其中采用电磁力矩方程和电压方程。车辆动力学模型分两步建立,电动车相关参数输入软件进行建模。采用电子差速控制和直接横摆控制两种控制方式。仿真和试验结果表明,这两种控制方式在低速下具有较好的控制效果。

Compared with traditional motor,hub motor has the advantages of fast response speed and high energy conversion rate.In order to ensure the safety of electric vehicle,the vehicle driven by hub motor removes the mechanical structure such as transmission.In this paper,the dynamic model is established by using the simulation matlab software to study the vehicle differential speed.The CARSIM software is used to model the vehicle parameters to make the experimental results as accurate as possible.Then the PID regulator is used to control the current,in which the electromagnetic torque equation and voltage equation are used.The vehicle dynamics model is established in two steps,and the relevant parameters of electric vehicle are input into the software for modeling.Electronic differential control and direct yaw control are adopted.The simulation and experimental results show that the two control modes have good control effect at low speed.