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Hybrid zero-voltage switching (ZVS) control for power inverters

United States Patent

9,484,840
November 1, 2016
View the Complete Patent at the US Patent & Trademark Office
A power inverter combination includes a half-bridge power inverter including first and second semiconductor power switches receiving input power having an intermediate node therebetween providing an inductor current through an inductor. A controller includes input comparison circuitry receiving the inductor current having outputs coupled to first inputs of pulse width modulation (PWM) generation circuitry, and a predictive control block having an output coupled to second inputs of the PWM generation circuitry. The predictive control block is coupled to receive a measure of Vin and an output voltage at a grid connection point. A memory stores a current control algorithm configured for resetting a PWM period for a switching signal applied to control nodes of the first and second power switch whenever the inductor current reaches a predetermined upper limit or a predetermined lower limit.
Amirahmadi; Ahmadreza (Orlando, FL), Hu; Haibing (Orlando, FL), Batarseh; Issa (Orlando, FL)
University of Central Florida Research Foundation, Inc. (Orlando, FL)
14/ 471,961
20150062988
August 28, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH This invention was made with U.S. Government support under Award Number DE-EE0003176 awarded by the U.S. Dept of Energy (DOE). The U.S. Government has certain rights in this invention.