Three-level power conversion device
AssigneeMitsubishi Electric Corporation
InventorsTakeshi Amimoto, Naoki Nishio
Life of this patent
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Abstract
A bridge circuit includes a first leg and a second leg arranged in parallel between the first node and the third node. A clamp circuit includes a third leg including a first bidirectional switch disposed between a fourth node that is a midpoint of the first leg and a fifth node that is a midpoint of the second leg. A first reactor is connected with the fourth node and a sixth node, and a second reactor is connected with a fifth node and a seventh node. A fourth leg includes a second bidirectional switch disposed between the second node and the fourth node or the fifth node.
Claims18
A three-level power conversion device comprising:
- a first filter circuit including:
- a first capacitor disposed between a first node to which a positive electrode of a DC power supply is connected and a second node;
- and
- a second capacitor disposed between the second node and a third node to which a negative electrode of the DC power supply is connected;
- a bridge circuit including a first leg and a second leg disposed in parallel between the first node and the third node;
- a clamp circuit including a third leg including a first bidirectional switch disposed between a fourth node that is a midpoint of the first leg and a fifth node that is a midpoint of the second leg;
- a second filter circuit including:
- a first reactor including a first terminal connected to the fourth node and a second terminal connected to a sixth node;
- and
- a second reactor including a first terminal connected to the fifth node and a second terminal connected to a seventh node;
- and
- a fourth leg including a second bidirectional switch disposed between the second node and the fourth node or the fifth node,
- the second node being connected to a first terminal of a first AC power supply and a first terminal of a second AC power supply, the sixth node being connected to a second terminal of the first AC power supply, and the seventh node being connected to a second terminal of the second AC power supply.
Dependencies are inferred from the claim text.