Zero voltage switched full bridge dc/dc converter
CA 2458137 C · Owner: Davidson, Christopher Donovan · Inventors: Davidson, Christopher Donovan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A buck derived Full Bridge Zero Voltage Switching (ZVS) galvanicaly isolated DC to DC Converter which includes an inductance placed effectively in parallel to the primary winding of the transformer and a second winding added to the output inductor with a second winding connected to an extra output diode to reduce the transformer load current to zero during the freewheeling interval and a third winding connected to a series capacitor to provide a path for AC current from the second winding. Additionally included is a means of recovering the stored energy in the series inductor caused by the reverse recovery current of the output diodes using one or more extra winding(s) in the transformer …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 17, 2004 and granted August 20, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 17, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.