摘  要：电动助力转向（EPS）是一种新型的汽车动力转向技术。设计了一种基于TMS320F2812 DSP控制的汽车电动助力转向系统；介绍了其硬件组成及软件结构；采用PID控制策略对电机电流进行闭环控制；利用PWM技术控制电机的电压，以调节助力电流，达到助力转向。实验结果表明，该系统具有较高的可靠性和良好的助力特性。
关键词：汽车；电动助力转向；TMS320F2812；脉宽调制

0Abstract: Electric power steering is a new steering power technology for vehicles.This paper designed an automobile electric power steering system based on TMS320F2812 DSP control.Introudced its hardware form and software frame,carried the closed loop adopting PID control strategy for motor current,and made use of PWM technique controlling motor voltage to adjust power current for power steering.The experimental results show the system has high reliability and good power characteristic.
Key Words: Automobile;Electric power steering;TMS320F2812;PWM