Patent ID: 7071581
Filing Date: 2006-07-04
Classification: H02J

Abstract:
1. A system for providing reliable, uninterruptible power to an electrical load, the system comprising: a primary power source to provide electrical power to said load; a wound-rotor induction machine, comprising a rotor, having a rotating shaft, rotor windings, a stator, and stator windings; an auxiliary power source having a start-up time to provide mechanical power to the shaft of the wound-rotor induction machine after said start-up time when said primary power source cannot provide power; means for exciting the rotor windings with a current to provide constant frequency to the electrical load as the rotating shaft speed varies; and a flywheel assembly that is disposed on said rotor shaft, storing rotational energy as kinetic energy; wherein said wound-rotor induction machine and said flywheel assembly provide instantaneous, short-term power to said electrical load in the event of failure of the primary power source, during said start-up time.