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Switch wear leveling

United States Patent

9,123,467
September 1, 2015
View the Complete Patent at the US Patent & Trademark Office
An apparatus for switch wear leveling includes a switching module that controls switching for two or more pairs of switches in a switching power converter. The switching module controls switches based on a duty cycle control technique and closes and opens each switch in a switching sequence. The pairs of switches connect to a positive and negative terminal of a DC voltage source. For a first switching sequence a first switch of a pair of switches has a higher switching power loss than a second switch of the pair of switches. The apparatus includes a switch rotation module that changes the switching sequence of the two or more pairs of switches from the first switching sequence to a second switching sequence. The second switch of a pair of switches has a higher switching power loss than the first switch of the pair of switches during the second switching sequence.
Wu; Hunter (Logan, UT), Sealy; Kylee (Logan, UT), Gilchrist; Aaron (Logan, UT)
Utah State University (North Logan, UT)
13/ 748,074
January 23, 2013
This invention was made with government support under contract DEEE0003114 by the Department of Energy. The government has certain rights in the invention.