Simulink Simulation Model for Voltage Control Speed Regulation of Three-Phase Induction Motors

Voltage control speed regulation for three-phase induction motors is a common speed adjustment method that modulates motor speed by varying stator voltage, particularly suitable for fan and pump loads. Simulink serves as a powerful simulation tool for accurate modeling and analysis of this process through block-based system implementation.

In the Simulink simulation model, the three-phase induction motor is typically represented by a dynamic equations module (such as the Asynchronous Machine block), integrated with voltage regulation modules like PWM inverters or thyristor-based voltage control circuits. During speed regulation, the system adjusts input voltage amplitude while monitoring real-time responses of rotational speed, torque, and current—enabled through Simulink's Scopes and Data Import/Export configurations—to validate the feasibility and stability of voltage-based speed control.

This simulation model is not only suitable for educational demonstrations but also facilitates optimization of practical control strategies. For instance, implementing closed-loop feedback (e.g., PID controllers via Simulink's PID Controller block) enhances speed regulation accuracy. The voltage control method offers advantages of simple structure and low cost, though efficiency drops at low speeds, requiring careful consideration of load characteristics in practical applications.

Through Simulink simulations, engineers can rapidly adjust parameters (e.g., voltage amplitude, PID gains) and analyze dynamic performance using simulation data logging and FFT analysis tools, providing reliable foundations for designing real-world motor control systems.