Patent ID: 7894211

Claim:
A wind energy converter comprising: a wind turbine; a generator adapted to be coupled directly to the wind turbine without neead for a mechanical gear unit; a rectifier coupled to the generator; a Cuk converter coupled to the rectifier, the Cuk converter having a duty ratio D controllable by an AC bus voltage controller implementing a proportion/integral loop; and an inverter coupled to the converter for providing a regulated AC output to a load; wherein a DC bus voltage Vdc is held constant by continuous modulation of the duty ratio D of the Cuk converter during normal wind speeds that produce a varying input voltage Vo so that Vdc=Vo*(D/(1−D)), wherein a boost action of the Cuk converter holds the DC bus voltage constant during a dip in wind speeds, and wherein a buck action of the Cuk converter holds the DC bus voltage constant during a sudden increase in the wind speeds.