Brushless DC Motor Dual-Closed-Loop PI Simulation Model

The Brushless DC Motor Dual-Closed-Loop PI Simulation Model is a motor control strategy verification method implemented through the Simulink platform. This model achieves precise regulation of motor speed and current through coordinated control of inner and outer loops.

The outer loop (speed loop) generates current reference values based on the deviation between target speed and actual speed using a PI regulator. The inner loop (current loop) rapidly tracks this current command to adjust the motor's phase current, thereby controlling electromagnetic torque. This hierarchical control structure effectively suppresses load disturbances and enhances system dynamic response capabilities.

When building the model in Simulink, it typically includes motor本体模块 (motor body module), PWM inverter module, coordinate transformation module, and dual PI controller modules. The implementation involves configuring transfer functions for PI controllers using Simulink's PID Controller blocks, where proportional (Kp) and integral (Ki) gains are tuned through parameter sweeping. By adjusting PI parameters, engineers can observe trade-offs between system response speed and stability. During simulation, special attention must be paid to sampling time selection to ensure computational accuracy while avoiding excessive computational load.

This simulation method provides reliable basis for parameter tuning in practical motor control systems, particularly suitable for development scenarios requiring rapid validation of control algorithm effectiveness. The model structure typically implements Clarke/Park transformations for coordinate conversion and uses PWM generation blocks for inverter control, with simulation scopes monitoring key variables like speed error and current waveforms.