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US 2026/0291398 A1Published application
Bidirectional dc-dc converter and its control method
AssigneeHyundai Mobis Co., Ltd.
InventorsTae Ho BANG, Won Gon KIM, Moon Hwan KEUM
Life of this patent
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Abstract
A bidirectional direct current to direct current (DC-DC) converter, and a control method therefor are provided. The bidirectional DC-DC converter is capable of being operated in a wide input voltage range and simultaneously bucking or boosting a voltage in both directions by suppressing overvoltage occurring in a low-voltage stage.
Claims20
A bidirectional direct current to direct current (DC-DC) converter, the converter comprising:
- a first terminal and a second terminal, each connected to a first power and a second power having a lower potential than the first power;
- a transformer installed between the first terminal and the second terminal;
- a high-voltage side totem-pole circuit including first and second switches, and installed between the first terminal and a primary side of the transformer;
- a cascode circuit including third, fourth, and fifth switches connected in series with one another, and installed between the high-voltage side totem-pole circuit and the primary side of the transformer;
- a clamp capacitor connected in parallel with the cascode circuit;
- a secondary-side circuit including sixth and seventh switches and an inductor, and installed between the second terminal and a secondary side of the transformer;
- an operation mode switching circuit including an eighth switch and a first diode connected in series with each other, and installed between the high-voltage side totem-pole circuit and the cascode circuit;
- and
- a controller configured to:
- control at least one of the first to eighth switches;
- and
- control the operation mode switching circuit based on a power flow direction between the first and second terminals.
9 more elements
A bidirectional direct current to direct current (DC-DC) converter, the converter comprising:
- a first terminal and a second terminal, each connected to a first power and a second power having a lower potential than the first power;
- a transformer installed between the first terminal and the second terminal;
- a high-voltage side totem-pole circuit including first and second switches, and installed between the first terminal and a primary side of the transformer;
- a transformer-side totem-pole circuit including third and fourth switches, and installed between the high-voltage side totem-pole circuit and the primary side of the transformer;
- a clamp capacitor connected in parallel with the transformer-side totem-pole circuit;
- a secondary-side circuit including fifth and sixth switches and an inductor, and installed between the second terminal and a secondary side of the transformer;
- an operation mode switching circuit including seventh and eighth switches connected in series with each other, and installed between the high-voltage side totem-pole circuit and the transformer-side totem-pole circuit;
- and
- a controller configured to:
- control at least one of the first to eighth switches;
- and
- control the operation mode switching circuit based on a power flow direction between the first and second terminals.
9 more elements
Dependencies are inferred from the claim text.