基于PIC18F4431的永磁BLDCM控制系统设计

Permanent Magnet BLDCM Control System Based on PIC18F4431 Microcontroller Design

随着无刷直流电机在运动控制领域应用越来越广泛,结合单片机的控制技术产生了新一代无刷直流电机控制技术。文中介绍了一种基于PIC系列单片机的高性能、低成本直流无刷电机控制系统,该系统利用PIC18F4431单片机的高速A/D采集模块、PWM模块和硬件乘法器实现了对PWM信号的产生、转子位置和速度的检测以及电流双闭环增量式PI控制,并对该控制系统的硬软件环节实现进行了阐述。模拟实验证明,该系统具有良好的动态性能与控制精度。

With the wide application of brushless DC motor to the field of motion control, a new generation of brusbless DC motor control technology has been developed, combined with single chip microcomputer control technol- ogy. This paper introduces this new type of brushless DC motor control system based on PIC series MCU, with high performance and low cost. By using a high-speed A/D acquisition module, PWM module and hardware multiplier of PIC18F4431MCU, the system can control the generation of PWM signal, rotor position detection and achieve the speed and current double closed-loop incremental PI control. In addition, the realization of hardware and software of the control system is expounded in this paper. The results of simulation experiment show that the system has excellent dynamic performance and control precision.