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Double-Fed Speed Control System for Wound-Rotor Induction Motor Based on SVPWM Control Technology

A high performance speed-regulating control system with high power factor and small harmonic pollution was realized. Firstly, the mathematical model of the grid side PWM converter was derived, and then voltage, current double close-loop control strategy based on a grid voltage orientation was proposed. Secondly, the mathematical model of wound-rotor induction motor(WRIM) was derived, and then the rotor side PWM converter control strategy based on a stator voltage orientation was designed. Finally, experimental platform for doubly-fed speed-regulating control system was built. Experimental results showed that the control strategy is feasible and efficient.