A simple yet efficient doubly-fed drive/generator controller

In this work a potentially universal algorithm for independent torque and reactive power control of doubly-fed machines is proposed. The method is inspired from the very essence of the machines dynamics and features an important asset compared to other model based approaches involving machine parameters or position encoder. It requires current and voltage measurements of the power side only. Applications include high performance drives and variable speed generators. Evidence of the good performance is shown through simulations and laboratory experiment.