Bidirectional isolated converter
AssigneeSolution X Co., Ltd.
InventorGibum YU
Life of this patent
Estimating the term…
Abstract
The present invention relates to a bidirectional isolated converter that improves efficiency by increasing the power ratio transmitted from a first bridge. The converter comprises: a first bridge having at least one switch leg; a second bridge connected in parallel with the first bridge and also having a switch leg; a first transformer connected to the first bridge; a second transformer connected to the second bridge, wherein its secondary side is connected in series with the secondary side of the first transformer; a third bridge connected to the first transformer and second transformer secondary sides, with an output terminal for a load; and a control unit that switches the second and third bridges between boost and buck modes.
Claims21
A bidirectional isolated converter comprising:
- a first bridge receiving a direct current through an input terminal and including at least one switch leg including two switches operated complementarily;
- a second bridge receiving the direct current through an input terminal, including at least one switch leg including two switches operated complementarily, and connected in parallel with the first bridge;
- a first transformer including a first primary side and a first secondary side connected to the first bridge;
- a second transformer including a second primary side and a second secondary side connected to the second bridge, the second secondary side being connected in series with the first secondary side;
- a third bridge connected to the first secondary side and the second secondary side, including at least one switch leg including two switches operated complementarily, and having a load connected to an output terminal;
- and
- a control unit controlling the switches included in the second bridge and the third bridge to control the switches to be in either a boost mode or a buck mode,
- controlling the first secondary side and the second secondary side to have the same polarity during at least some periods in the boost mode, and
- controlling the first secondary side and the second secondary side to have opposite polarities during at least some periods in the buck mode.
(canceled)
Dependencies are inferred from the claim text.