Title:
UNINTERRUPTIBLE POWER SUPPLY SYSTEMS AND METHODS USING RECTIFIED AC WITH CURRENT CONTROL
Document Type and Number:
WIPO Patent Application WO2002071568
Kind Code:
A3
Abstract:
An uninterruptible power supply (UPS) system includes an AC input port, a DC input port, and an output port configured to be connected to an AC load. A rectifier circuit is coupled to the AC input port, and a power transfer control circuit is coupled to the rectifier circuit output, the DC input port and the output port. The power transfer control circuit produces a DC voltage at the AC load from a rectified voltage produced by the rectifier circuit in a first mode of operation and from a DC voltage at the DC input port in a second mode of operation. A current control circuit, e.g., a boost regulator, may control a current from at least one of the rectifier circuit and the DC input port responsive to a control input. A DC/DC converter circuit may be coupled between the DC input port and the output port.
Inventors:
OUGHTON GEORGE W JR
Application Number:
PCT/US2002/006341
Publication Date:
November 21, 2002
Filing Date:
March 01, 2002
Export Citation:
Assignee:
POWERWARE CORP (US)
International Classes:
H02J9/06; H02M1/10; (IPC1-7): H02J9/06; H02M5/458
Foreign References:
| US5289046A | 1994-02-22 | |||
| US6169669B1 | 2001-01-02 | |||
| EP0599814A2 | 1994-06-01 |
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