Patent ID: 8193654

Claim:
A machine suitable for generating power in a variable speed wind energy generation system, the machine including: a primary induction generator having a primary rotor, and a secondary induction generator having a secondary rotor, the primary rotor and the secondary rotor being mounted so as to be rotated by a shaft common to both the primary induction generator and the secondary induction generator, wherein each of the primary rotor and the secondary rotor comprise an insulated squirrel-cage design including a plurality of cage bars positioned around a laminated core wherein each of the cage bars of the primary rotor are electrically isolated from the laminated core as well as from adjacent cage bars within the primary rotor; and wherein each of the cage bars of the secondary rotor are electrically isolated from the laminated core as well as from adjacent cage bars within the secondary rotor; wherein each one of the cage bars of the primary rotor is electrically connected to a corresponding one of the cage bars of the secondary rotor forming an electrical connection between the primary induction generator and the secondary induction generator; wherein the machine further includes a controller and an inverter operatively connected to the controller, the inverter is operatively connected to the secondary induction generator for supplying the secondary induction generator with power, the controller being able to control the supply of the power from the inverter to the secondary induction generator to effect the output from the primary induction generator.