Journal of Electrical Engineering and Automation

Three-phase asynchronous motors are extensively utilized in industrial production, where their speed regulation performance directly impacts production efficiency and equipment reliability. To achieve precise and efficient speed control, variable frequency drive (VFD) systems have become the mainstream control method. Traditional PID control exhibits limitations such as prolonged response time and over-regulation during adjustment. This study investigates optimization methods for PID control in VFD systems for three-phase asynchronous motors. By refining the PID control algorithm and integrating practical operational characteristics, a genetic algorithm-based parameter optimization scheme is proposed. Experimental results demonstrate that the optimized PID controller demonstrates significant advantages in speed regulation accuracy, response time, and system stability, effectively enhancing the overall performance of VFD systems.

Three-phase asynchronous motor; Frequency conversion speed regulation; PID control; Optimization; Genetic algorithm