Control of an AC-to-DC power supply assembly fed by a three-phase AC source

US7715215B1 · kind B1 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Frank E. Bosco · Poughkeepsie, US
• Kevin R. Covi · Glenford, US
• Anthony Joseph Cozzolino · New Paltz, US
• Gary F. Goth · Pleasant Valley, US
• Raymond J. Harrington · Staatsburg, US
• Peter Hein · Bamberg, DE
• Raymond Longhi · Poughkeepsie, US
• Edward J. Seminaro · Milton, US
• Peter A. Wendling · Beverly, US

Key dates

• Filing date: Jan 29, 2009
• Grant date: May 11, 2010
• Expiry date: Jan 29, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02M1/0012
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

Control of an AC-to-DC power supply assembly fed by a three-phase AC source is provided by: determining whether the power supply assembly includes greater than three single-phase power regulators feeding a common load, with multiple regulators being connected in parallel across a common phase of the AC source, and if so, summing currents provided by the regulators to the common load; and ascertaining whether the summed current is less than a predefined threshold, and if yes, operating the power supply assembly in a line balance mode to maintain power drawn on the phases of the AC source in balance, and if greater than the predefined threshold, operating the power supply assembly in a maximize power mode wherein power is provided to the common load without maintaining power drawn on the phases of the AC source in balance.