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Non-synchronous control of self-oscillating resonant converters

United States Patent

June 18, 2002
View the Complete Patent at the US Patent & Trademark Office
A self-oscillating switching power converter has a controllable reactance including an active device connected to a reactive element, wherein the effective reactance of the reactance and the active device is controlled such that the control waveform for the active device is binary digital and is not synchronized with the switching converter output frequency. The active device is turned completely on and off at a frequency that is substantially greater than the maximum frequency imposed on the output terminals of the active device. The effect is to vary the average resistance across the active device output terminals, and thus the effective output reactance, thereby providing converter output control, while maintaining the response speed of the converter.
Glaser; John Stanley (Niskayuna, NY), Zane; Regan Andrew (Scotia, NY)
General Electric Company (Schenectady, NY)
09/ 681,395
March 29, 2001
FEDERAL RESEARCH STATEMENT The U.S. Government may have certain rights in this invention pursuant to contract number DEFC2699FT40630 awarded by the U.S. Department of Energy.