Patent ID: 6512305
Filing Date: 2003-01-28
Classification: H02J,H02K,Y02E

Abstract:
An uninterruptible power supply (UPS) that receives primary power from a primary power source and supplies power to a critical load, said UPS being operable in modes comprising STANDBY, TRANSITIONAL and ACTIVE modes, said UPS comprising:a housing that is sealed CLOSED during STANDBY mode, and OPEN during ACTIVE mode; a rotary electrical machine having a machine rotor, said electrical machine being electrically connectable to said primary power source and being operable as a motor during STANDBY mode when it receives electric power from said primary power source, and in GENERATOR mode to supply power to said critical load during TRANSITIONAL and ACTIVE modes; and a turbine, mounted in said housing, having a turbine rotor and a normally inactive fluid supply which, during ACTIVE mode, supplies a flow of motive fluid to said turbine rotor to rotate said turbine rotor which rotates said machine rotor, said turbine rotor being driven by said machine rotor during STANDBY mode to store kinetic energy, said kinetic energy being used, during TRANSITIONAL mode, to drive said machine rotor.