车用小型无刷直流电机转速控制系统设计

Design of Speed Control System for Small Brushless DC Motor in Vehicle

针对车用小型无刷直流电机转速控制过程中存在超调量大、转矩波动大和调速不平滑等问题,采用STM32F103C8T6单片机作为无刷直流电机的控制核心,并利用PID修正算法实现了车用小型直流无刷电机的转速控制。为了增大无刷直流电机的调速范围、减小系统静差率,采用校正后的PID算法控制无刷直流电机的转速,其特点是原理简单、调速控制方便、性能稳定。通过仿真和实验验证表明,采用PID校正后,电机抗干扰和动态控制能力大幅提升,系统的稳态精度高,跟随性强,超调量小,非常适合在负载突变频繁的环境中工作。

To aim at the problems of large overshoot,large torque fluctuation and uneven speed regulation in the speed control of small brushless DC motors for vehicles,this design uses STM32F103C8T6 single-chip microcomputer as the control core of brushless DC motors,and realizes the rotational speed control of small DC brushless motor for vehicles with PID correction algorithm.In order to increase the speed range of the brushless DC motor and reduce the static error rate of the system,this design uses the corrected PID algorithm to control the speed of the brushless DC motor.It is characterized by simple principle,convenient speed control and stable performance.The simulation and experimental validation show that the PID correction has significantly improved the anti-interference and dynamic control capabilities of the motor,and the system has high steady-state accuracy,strong followability,and small overshoot,which is very suitable for working in the environment with frequent load changes.