Brushless DC Motor Simulation Control Model Based on BUCK Buck Chopper Circuit

This brushless DC motor simulation control model integrates power electronics conversion technology with motor control strategies to efficiently regulate motor speed and torque. The implementation typically involves MATLAB/Simulink blocks for power stage modeling and control algorithm development.

The BUCK buck chopper circuit serves as the core power conversion module, where PWM duty cycle adjustment controls the output voltage to regulate the brushless DC motor's supply voltage. Compared to traditional driving methods, this approach reduces energy loss while improving dynamic response capability. In code implementation, this would involve setting up MOSFET/IGBT switching logic with dead-time compensation to prevent shoot-through.

The simulation model generally consists of three key components: PWM modulation module: Dynamically adjusts switch duty cycle based on speed error signals using PID controller algorithms Commutation logic unit: Implements electronic commutation through Hall sensor signals or back-EMF detection, often coded with state machine logic Closed-loop control layer: Employs PID algorithms for precise closed-loop regulation of motor speed/current, where tuning parameters (Kp, Ki, Kd) are optimized through Ziegler-Nichols or similar methods

This model is particularly suitable for applications requiring wide voltage range operation, such as electric vehicles or industrial servo systems. Through simulation, stability under different load conditions can be verified, and control strategies like soft-start and braking protection can be optimized using scenario-based testing approaches.