Cascaded single phase PFC rectifier pair for permanent magnet wind generation system

In order to overcome the problems such as heavy distortion of winding current, low power factor and high cost of DC inductor met in the traditional rectified permanent magnet (PM) wind generation system, a circuit of cascaded single phase power factor correction (PFC) rectifier pair is proposed and discussed. In the new scheme, proper designed armature inductor of the generator is used as boost inductor, and the winding current is controlled by PWM to approach a sinusoidal waveform aligned with the back EMF in the winding. The DC ports of two such PFC rectifiers linked to a pair of windings placed perpendicularly are then connected in cascade that avoids the voltage ripple at DC link. Simulation and experiments have been performed to validate the new scheme.