The Dynamic Control of Reactive Power for the Brushless Doubly Fed Induction Machine With Indirect Stator-Quantities Control Scheme

Compared to the doubly fed induction machine (DFIM), the brushless doubly fed induction machine (BDFIM) has higher reliability by virtue of the absence of a brush gear. Recent research on structure optimization design and control strategy of BDFIM has made remarkable progress. BDFIM indirect stator-quantities control (ISC) is a new control strategy, which, in comparison to vector control strategy, requires fewer parameters and does not need rotating coordinate transformation. This paper further develops the dynamic control of reactive power for the BDFIM with ISC scheme. Detailed theoretical analysis is done to show the controller structure of the reactive power. The experimental results of the prototype show the feasibility of the proposed scheme. As a result, the proposed ISC controllers have been able to control not only speed and torque, but also the reactive power.

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