SYSTEM AND METHOD FOR PROVIDING CONSTANT LOADING IN AC POWER APPLICATIONS

• US 20090200981A1
• Filed: 08/06/2008
• Published: 08/13/2009
• Est. Priority Date: 08/24/2007
• Status: Active Grant

• Current Assignee: Powerwise Group, Inc.
• Original Assignee: Powerwise Group, Inc.
• Inventors: Lumsden, John L.
• Granted Patent: US 8,120,307 B2
• Time in Patent Office: Days
• US Class Current: 318/812
• CPC Class Codes: H02P 23/02 specially adapted for optimising the efficiency at low load

Abstract

A system and method for providing constant loading in AC power applications wherein at least one turn-on point (7) of at least one half cycle of a modulating sine wave (2) is determined; at least one turn-off point (8) of said at least one half cycle of a modulating sine wave (2) is determined; and at least one slice (5) located between said at least one turn-on point (7) and said at least one turn-off point (8) is removed. The slices (5) may be removed by utilizing triode alternating current switches, silicone controlled rectifiers, insulated gate bipolar transistors or field effect transistors.

Claims