Reach For Brushless DC Motor Fuzzy Control System Based On ARM

The brushless DC motor (BLDCM) control system is a new type of speed control system. The system has a good run, control and economic performance, showing great potential for development. In this paper, the brushless DC motor control objects, applications ARM microprocessor brushless DC motor control system hardware and software design. The control system of BLDCM has the characteristics of the digitized. Through the combination of the digital signal processor and associated analog circuitry, realize the digitizing process to the motor control.Designed and implemented based on the ARM (LPC1766) speed and current dual closed loop brushless DC motor control system. Analysis the Fuzzy PID control theory in brushless DC motor control system and completed the PID adaptive simulation. System software design, modular basic idea, depending on the functions and features built in Matlab/Simulink conditions several independent, non-interfering modules and by the combination of the different functional modules,build a brushless DC motor system simulation model. These functional modules including BLDC overall module (overall module includes a brushless DC motor body, speed calculation, calculation of back EMF and torque calculation module), hysteresis current control module, speed control module, voltage inverter module. Based on this fuzzy PID parameter self-adaptive simulation results show that the method has many advantages, such as responsiveness, stability and tracking ability to highlight, small overshoot in a timely manner.In addition, the control system design, clever double closed loop design speed of the outer and inner current loop, the outer ring and the inner ring, respectively, by the fuzzy PID current hysteresis to control. In addition, the control system software of the system responsible for the A/D conversion by the main program (responsible for the initialization of variables and chips), the service routine (for generating a PWM signal, to capture the location signal, etc.) as well as interrupt subroutines three components.