Patent ID: 6198640
Filing Date: 2001-03-06
Classification: H02M

Abstract:
A DC to DC converter, comprising:a first transformer having a first primary circuit and a secondary primary circuit and a first secondary circuit, said first secondary circuit coupled to a load;a input voltage source coupled to said first primary circuit via an inductor circuit having a first winding and a second winding, so that said first transformer is driven by a current source;a second transformer having a first primary circuit and a first secondary circuit, and a second secondary circuit, said first primary circuit connected in series with said first transformer first primary circuit, said first secondary circuit connected in series with the anode of a diode rectifier and the diode rectifier cathode connected to said input voltage and said first secondary circuit also connected to a return path and said second secondary connected to said input voltage;a first switching device coupled to said return path wherein said first switching device is coupled in series with said second transformer first primary circuit;a second switching device coupled to said return path wherein said second switching device is coupled in series with said first transformer second primary circuit;a control switching device coupled to said return path wherein said control switching device is coupled in series with said second transformer second secondary circuit; anda controller coupled to said control switching device, said first switching device, said second switching device, and said load, for periodically connecting said return path to said second transformer first primary circuit, and for periodically connecting said return path to said first transformer second primary circuit, and for periodically connecting said return path to said second transformer second secondary circuit.