Source volt-ampere/load volt-ampere differential converter

Claim 1

A source volt-ampere/load volt-ampere differential converter circuit of single quadrant compound switching DC-DC topology comprising: a DC voltage source; a first power transformer including a primary winding and a secondary winding, said first power transformer being configured and polarized in the isolated boost mode (fly-back); a second power transformer including a primary winding and a secondary winding, said second power transformer being configured and polarized in the isolated buck mode (forward); a first switching device to selectively couple said voltage source across the primary winding of said first power transformer; a second switching device to selectively couple the boost voltage product of said first power transformer/said first switching device across the primary winding of said second power transformer; a first unidirectional conducting device connected in series between said first switching device and the primary winding of said first power transformer and oriented to conduct during conduction by said first switching device; a second unidirectional conducting device connected in series between the junction of said first unidirectional conducting device/primary winding of said first power transformer and a first capacitor, and oriented to conduct during non-conduction by said first switching device; said first capacitor connected between the series combination of said second unidirectional conducting device/primary winding of said first power transformer and said DC voltage source negative, and oriented to integrate the boost voltage product of said first switching device and said first power transformer; a third unidirectional conducting device connected in series with the secondary windings of said first and second power transformers, and oriented to conduct during conduction by said second switching device; a fourth unidirectional conducting device connected in parallel with the series combination of said third unidirectional conducting device/secondary winding of said second power transformer, and oriented to conduct during nonconduction by said first switching device; a second capacitor connected in parallel with the series combination of said third unidirectional conducting device/secondary windings of said first and second power transformers, and oriented to integrate the compound boost-buck voltage product of said first and second power transformers/said first and second switching devices/said first, second, third, and fourth unidirectional conducting devices/said first capacitor; a utilization load connected across said second capacitor; a control means for selectively and simultaneously opening and closing said first and second switching devices for compound energy transfer from said DC voltage source to said utilization load, and responsive to the differential transfer function δ=t on/(t on+t off)/{1-[t on/(t on+t off)]}.