H - Electricity – 02 – M
Patent
H - Electricity
02
M
H02M 3/335 (2006.01)
Patent
CA 2458137
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, which are connected via a series capacitor, and a rectifying circuit back to the source voltage, as well as a method, which allows control of the energy stored in the parallel inductance to optimize ZVS for different output voltages.
Davidson Christopher Donovan
Smiths Ip
LandOfFree
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