Single-stage DC-DC power converter
AssigneeABB Power Electronics Inc.
InventorsArturo Silva, Loc Ngo, Richard Yeager, Jouni Uusitalo
Life of this patent
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Abstract
A power converter is provided. The power converter includes an input side having a first input winding and a second input winding coupled in electrical series to the first input winding. The power converter also includes an output side having a first output winding and a second output winding coupled in electrical parallel to the first output winding.
Claims16
A power converter comprising:
- a transformer having an input side and an output side, the input side and output side being galvanically isolated from each other, wherein the input side comprises (i) a first input winding having first and second terminals and (ii) a second input winding having third and fourth terminals, wherein the third terminal of the second input winding is directly connected to the second terminal of the first input winding to connect the first and second input windings in electrical series, and wherein the output side comprises (i) a first output winding having fifth and sixth terminals and (ii) a second output winding having seventh and eighth terminals, wherein the second output winding is coupled in electrical parallel with the first output winding;
- a first current doubler comprising:
- a first output inductor having (i) a ninth terminal coupled to the fifth terminal of the first output winding and (ii) a tenth terminal directly connected to a load terminal of the power converter;
- and
- a second output inductor having (i) an eleventh terminal coupled to the sixth terminal of the first output winding and (ii) a twelfth terminal directly connected to the load terminal;
- a second current doubler comprising:
- a third output inductor having (i) a thirteenth terminal coupled to the seventh terminal of the second output winding and (ii) a fourteenth terminal directly connected to the load terminal;
- and
- a fourth output inductor having (i) a fifteenth terminal coupled to the eighth terminal of the second output winding and (ii) a sixteenth terminal directly connected to the load terminal;
- first, second, third, and fourth switches configured to couple a voltage source to the first and second input windings, wherein the first and second switches are coupled to the first terminal of the first input winding and the third and fourth switches are coupled to the fourth terminal of the second input winding;
- and
- a controller configured to monitor current output by the first and second current doublers and to compensate for imbalances between the first and second current doublers through upstream control of the first and second current doublers.
A method of assembling a power converter comprising a transformer having an input side and an output side, the output side being galvanically isolated from the input side, the input side comprising first and second input windings, wherein a second terminal of the first input winding is directly connected to a third terminal of the second input winding to couple the first and second input windings in electrical series, and the output side comprising first and second output windings, wherein the first and second output windings are coupled in electrical parallel, said method comprising:
- coupling a first terminal of the first input winding of the transformer to first and second switching devices;
- coupling a fourth terminal of the second input winding of the transformer to third and fourth switching devices;
- coupling a first current doubler to the first output winding of the transformer, wherein the first current doubler comprises first and second output inductors each directly connected to a load terminal of the power converter;
- coupling a second current doubler to the second output winding of the transformer, wherein the second current doubler comprises third and fourth output inductors each directly connected to the load terminal;
- and
- arranging a controller to simultaneously control the first and third output inductors and to simultaneously control the second and fourth output inductors such that the controller compensates for imbalances caused by a printed wiring board (PWB) of the power converter.
Dependencies are inferred from the claim text.