The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 03, 2010
Filed:
May. 14, 2007
Keming Chen, Torrance, CA (US);
Steven E. Schulz, Torrance, CA (US);
Keming Chen, Torrance, CA (US);
Steven E. Schulz, Torrance, CA (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A method of operating an isolated bi-directional dc/dc converter to provide voltage regulation at a no-load condition over a wide voltage range and also provide overshoot protection for the boost mode main switching transistors uses new boost mode drive waveforms. The new waveforms drive switches Sand Sto be turned off during boost mode and only Sand Sare switched to provide reverse energy flow at no-load. In boost mode, Cand Cprovide overshoot protection caused by leakage inductance of the isolation transformer when boost mode drive transistors turn off during forward energy flow and provide stored energy for reverse energy flow during reverse energy flow periods used for voltage regulation in the boost mode. In buck mode, Cand Cprovide soft switching for buck mode main switching transistors Sand S