Rotary induction machine having control of secondary winding impedance

Claim 1

A rotary induction generator comprising a stator having wound thereon stator windings defining a three-phase stator; a rotor mounted for rotation in said stator and having wound thereon three rotor winding defining a three-phase rotor; said three-phase stator windings adapted to be connected to a source of electrical power and serving as primary windings whereby the applied power causes current to flow in said three-phase windings and provide a rotating magnetic field; said other three-phase windings serving as a secondary winding coupled to said magnetic field whereby currents are induced in said secondary windings which in turn induce power in said primary windings in response to rotation of the rotor; capacitive means connected directly across each of said secondary windings having a value sufficient to increase the efficiency of said machine; and resistive means connected in series with said secondary windings to control the power output for different rotor speeds.