Patent ID: 9627979
Date: 2017-04-18
CPC Classifications: H02M,Y02B

Claim:
1. A dual mode DC-DC converter comprising: a first bridge converter having first and second switches connected in series, third and fourth switches connected in series, and the first and second series connected switches connected in parallel with the third and fourth series connected switches; a second bridge converter having fifth and sixth switches connected in series, seventh switch and eighth switches connected in series, and the fifth and sixth series connected switches connected in parallel with the seventh and eighth series connected switches; a transformer including a first winding having a first end connected to a first node between the first and second series connected switches and a second end connected to a second node between the third and fourth series connected switches, the transformer further including a second winding having a first end connected to a third node between the fifth and sixth series connected switches and a second end connected to a fourth node between the seventh and eighth series connected switches; an inductance in series with one of the windings; and a controller, wherein the controller is operative in a first mode whereupon all eight switches are switched in a manner to transfer DC electrical power from the first bridge converter to the second bridge converter, or vice versa, wherein the controller is also operative in a second mode whereupon the first, second, fifth, and sixth switches are switched in a manner to transfer DC electrical power from the first bridge converter to the second bridge converter, or vice versa, while the third and seventh switches are maintained in an off-state and the fourth and eighth switches are maintained in an on-state.