Power conversion device

摘要

In a power conversion apparatus, a secondary winding is connected between main terminals of one of two circuit elements included in a main series circuit, and a voltage applied to a primary winding induces a voltage in a secondary winding in a direction from a first main terminal of a secondary winding, which is disposed at a low-potential side of the main series circuit, toward a second main terminal of a secondary winding, which is disposed at a high-potential side of the main series circuit. A rectifying unit blocks a current flowing from the high-potential side of the main series circuit toward the low-potential side of the main series circuit in a current path that includes the secondary winding and bypasses one of the two circuit elements included in the main series circuit.

主权项

1. A power conversion device comprising:
a main series circuit including two circuit elements connected in series at a common connection point; a main inductance element connected with the common connection point of the main series circuit; a transformer having a primary winding and a secondary winding; an auxiliary switching unit switching an operation state of the primary winding between a conduction state and a non-conduction state; and a rectifying unit allowing an electric current to flow in one direction and blocking an electric current in an opposite direction, wherein the primary winding is connected with the main series circuit in parallel via the auxiliary switching unit, the secondary winding is connected between main terminals of one of the two circuit elements included in the main series circuit, and a voltage applied to the primary winding via the auxiliary switching unit induces a voltage in the secondary winding in a direction from a first main terminal of the secondary winding toward a second main terminal of the secondary winding, the first main terminal of the secondary winding is disposed at a low-potential side of the main series circuit and the second main terminal of the secondary is disposed at a high-potential side of the main series circuit, and the rectifying unit blocks a current flowing from the high-potential side of the main series circuit toward the low-potential side of the main series circuit through a current path that includes the secondary winding and bypasses the one of the two circuit elements included in the main series circuit.