Patent ID: 6239513
Filing Date: 2001-05-29
Classification: H02J,Y02B,Y04S

Abstract:
An emergency supplemental power supply for outage protection of critical electric equipment load powered from a commercial power grid, comprising:a) a variable speed drive with input from said commercial power grid in parallel with the critical electric equipment load;b) an asynchronous motor powered from said variable speed drive for turning a fly-wheel attached thereto to build and maintain a level of expendable kinetic energy in said fly-wheel;c) means for coupling said fly-wheel to a synchronous alternating current generator for driving said generator in a no-load, standby condition;d) first and second normally-closed commercial power contactors, for opening and isolating the commercial power grid and for opening and isolating said variable speed drive upon commercial power interruption, and a third normally-open interrupt contactor;e) a computer processor controller interconnected said first, second, and third contactors, said variable speed drive, and said synchronous alternating current generator, for maintaining the frequency of alternating current output from said synchronous alternating current generator slightly above the frequency of the commercial power on the grid and in a ready condition for input to the critical electric equipment load;f) said third interrupt contactor, interposed the output of said synchronous alternating current generator and the critical electric equipment load, arrange to close upon interruption of the commercial electric power and opening of said first and second contactors, to allow the kinetic energy in said rotating fly-wheel to drive said synchronous alternating current generator, without further input power from said variable speed drive or said synchronous motor, and pass a regulated alternating current and voltage and a decaying frequency from said synchronous alternating current generator to the load.