Design of a Low-Harmonic-Content Wound Rotor for the Brushless Doubly Fed Gen…

The rotor structure is one of the key factors affecting the performance of the brushless doubly fed machine (BDFM). This paper presents a “double-sine” wound rotor for the brushless doubly fed generator to reduce the harmonic contents of the rotor winding. Ideally, so-called double sine is to make the magnetomotive force (MMF) space vector in one set of three-phase symmetric windings only c…