| US 7,550,872 B2 | ||
| Current sensor apparatus and method for uninterruptible power supply | ||
| Fokke Hoekstra, Drachten (Netherlands); Robert Zijlstra, Boelenslaan (Netherlands); Chris van Kalken, Muralto (Switzerland); Rajendra Naik, Bangalore (India); and Pradeep V, Bangalore (India) | ||
| Assigned to General Electric Company, Schenectady, N.Y. (US) | ||
| Filed on Dec. 19, 2006, as Appl. No. 11/612,691. | ||
| Prior Publication US 2008/0143187 A1, Jun. 19, 2008 | ||
| Int. Cl. H02J 7/00 (2006.01); H02J 9/00 (2006.01) | ||
| U.S. Cl. 307—64 | 8 Claims |
| 1. An uninterruptible power supply comprising an input power supply and a main power circuit providing a DC output voltage
and being connected to the input power supply, said input power supply providing an AC voltage, wherein said uninterruptible
power supply further comprises
a current sensor connected in series between the power supply and the main power circuit and the current sensor configured
to continuously sense a total current received from said input power supply; and
at least one accessory circuit connected to receive the AC voltage from the input power supply and being connected in parallel
with the main power circuit, said connection being between said current sensor and said main power circuit, said current sensor
measuring the total current drawn from said input power supply and provided to said main power circuit and to said at least
one accessory circuit;
wherein said total current is in-phase with said input power supply voltage and wherein said total current received from said
input power supply comprises an inductor current and an accessory circuit current.
|