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Variable frequency iteration MPPT for resonant power converters

United States Patent

June 30, 2015
View the Complete Patent at the US Patent & Trademark Office
A method of maximum power point tracking (MPPT) uses an MPPT algorithm to determine a switching frequency for a resonant power converter, including initializing by setting an initial boundary frequency range that is divided into initial frequency sub-ranges bounded by initial frequencies including an initial center frequency and first and second initial bounding frequencies. A first iteration includes measuring initial powers at the initial frequencies to determine a maximum power initial frequency that is used to set a first reduced frequency search range centered or bounded by the maximum power initial frequency including at least a first additional bounding frequency. A second iteration includes calculating first and second center frequencies by averaging adjacent frequent values in the first reduced frequency search range and measuring second power values at the first and second center frequencies. The switching frequency is determined from measured power values including the second power values.
Zhang; Qian (Orlando, FL), Bataresh; Issa (Orlando, FL), Chen; Lin (Orlando, FL)
University of Central Florida Research Foundation, Inc. (Orlando, FL)
14/ 272,110
May 7, 2014
U.S. GOVERNMENT RIGHTS This invention was made with U.S. Government support under Department of Energy (DOE) Award Number: DE-EE0003176. The U.S. Government has certain rights in this invention.