H - Electricity – 02 – J
Patent
H - Electricity
02
J
323/31, 321/83
H02J 9/00 (2006.01) G05F 1/13 (2006.01) H02J 9/06 (2006.01) H02M 3/337 (2006.01) H02M 7/00 (2006.01)
Patent
CA 1152153
UNINTERRUPTIBLE POWER SUPPLY WITH LOAD REGULATION OF STANDBY VOLTAGE SOURCE Abstract of the Disclosure The present invention relates to an uninter- ruptible power supply. The power supply is comprised of an input to accept an AC power source. A controlled ferroresonant regulator is coupled to the input and energized by the AC power source. A rectifier is coupled to the ferroresonant regulator to derive a first rectified DC voltage therefrom. An inverter is energized by the first rectified DC voltage. An output unit is provided to accept a load energized by a second rectified DC voltage output of the inverter. A voltage sensor is coupled to sense a voltage of the load and to a ferro-control to control the controlled ferroresonant regulator and to regulate the second rectified DC voltage output of the inverter at a first magnitude level by controlling a DC level of the first rectified DC voltage. A voltage regulation circuit is provided which includes a second input adapted to accept a reserve DC voltage source and an output unit to couple it to the inverter. The voltage regulation circuit responds to the voltage sensor when the voltage level of the second rectified DC voltage output drops below the first magnitude level and is operative to amplitude modulate and couple a voltage level supplied by the reserve DC voltage source to the inverter and to control a DC voltage level of a voltage applied to the inverter level so that a third rectified DC voltage output of the inverter at the load is slightly lower in magnitude than the first magnitude level of the second rectified DC voltage output occurring at the load. This is accomplished in response to the controlled ferroresonant regulator. As a result, a failure of the primary power source enables the voltage regulator circuit to insure a continued DC voltage at the load.
369277
Fickenscher Hermann
Hock Richard H.
Ray Richard C.
Scuderi Rudolph
Kirby Eades Gale Baker
Western Electric Company Incorporated
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