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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 containing...
Since the rotor winding (RW) of the Brushless Doubly-Fed Machine (BDFM) needs to be designed to couple the magnetomotive forces (MMFs) generated by the power winding (PW) and the control winding (CW), it is difficult to control the harmonic contents in the RW of the BDFM. Based on the principles of tooth harmonic and sinusoidal winding structure, a multi-pitch unequal-turn-coil wound rotor of the...
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