초록 ▼

A motor generator set that is used to provide clean, noise-free power to a load, such as a computer, is upgraded to a complete uninterruptible power supply by the addition of a logic controlled, battery powered inverter that is readily connected in the main power supply line to the motor generator.

A motor generator set that is used to provide clean, noise-free power to a load, such as a computer, is upgraded to a complete uninterruptible power supply by the addition of a logic controlled, battery powered inverter that is readily connected in the main power supply line to the motor generator. The emergency power inverter operates only when normal utility power fails, and employs the ability of the motor generator set to handle brief power outages to power the load for the brief time needed to decouple the main line power supply and couple the inverter to the motor generator. An oscillator that clocks trigger pulses for the inverter tracks motor voltage frequency and phase until power is supplied to the motor from the standby inverter. Switching to the emergency power inverter is accomplished by detecting both reverse power and zero current.

대표청구항 ▼

An emergency power supply comprising a multiphase power source, a motor generator system connected to be driven by said power source and to provide power to a load during operation of said power source, and a standby, normally inactive emergency power supply comprising inverter means for generating

An emergency power supply comprising a multiphase power source, a motor generator system connected to be driven by said power source and to provide power to a load during operation of said power source, and a standby, normally inactive emergency power supply comprising inverter means for generating multiphase power, means for sensing failure of said power source, control means responsive to said failure sensing means for holding said inverter in inactive condition during normal operation of said power source and for initiating operation of said inverter means in response to failure of said power source, and means responsive to said control means for disconnecting said power source from said motor generator and for coupling said inverter means to said motor generator to drive said motor generator system from said inverter means upon failure of said power source.