Field Weakening Control Implementation for Motor Systems

This document presents a field weakening control system developed by the author. The system effectively implements field weakening control when the motor accelerates from 3000 rpm to 4000 rpm, utilizing advanced control algorithms that dynamically adjust the d-axis current component to weaken the magnetic field while maintaining torque output. Compared to traditional excitation control methods, this approach demonstrates higher efficiency and stability through optimized PWM modulation techniques and real-time current vector control implemented in the embedded code. The field weakening control algorithm additionally addresses excessive heat generation during high-speed motor operation by incorporating thermal management routines that monitor temperature sensors and adjust control parameters accordingly. This significantly extends the motor's service life through preventive thermal protection mechanisms coded into the system. Key functions implemented include: - Flux weakening algorithm with d-q axis current regulation - Speed PI controller with anti-windup protection - Thermal monitoring and protection routines - PWM signal generation with dead-time compensation In conclusion, the implementation of field weakening control holds significant importance as it enables better management of motor operating states, ultimately achieving more efficient and reliable motor control through sophisticated software algorithms and hardware integration.