Theoretical Research and Simulation Applications of Wound-Rotor Double-Fed Induction Motors

Wound-rotor double-fed induction motors (DFIM) are widely used in wind power generation and industrial drive systems due to their excellent performance characteristics and flexible control capabilities. This article explores both theoretical research aspects and simulation applications of these motors.

In theoretical research, the core feature of wound-rotor DFIM lies in its rotor-side wound structure, which enables bidirectional power flow through slip rings and external power supplies. The mathematical model is typically established in a synchronous rotating coordinate system (d-q reference frame) using voltage equations, flux linkage equations, and torque equations to analyze dynamic characteristics. Control strategies such as field-oriented control (vector control) and direct torque control (DTC) algorithms can significantly improve motor response speed and stability. These control methods typically involve coordinate transformation calculations and PID regulator implementations in control systems.

For simulation applications, tools like MATLAB/Simulink or ANSYS enable modeling and performance testing of wound-rotor DFIM. Simulations can replicate operating characteristics under various conditions, including grid voltage fluctuations and sudden load changes, to validate control algorithm effectiveness. In MATLAB implementations, this typically involves building subsystem blocks for motor models, power converters, and control algorithms. Parameter optimization and efficiency analysis through simulation provide theoretical support for practical applications, where scripts can automate parameter sweeping and performance metric calculations.

In conclusion, theoretical research and simulation applications of wound-rotor DFIM complement each other, facilitating deeper understanding of operational mechanisms while providing crucial references for engineering practice.