POWER CONVERSION DEVICE

摘要

A power conversion device includes a transformer, a first power conversion unit that performs power conversion on a primary side of the transformer to convert DC power to AC power on the primary side of the transformer, and a second power conversion unit that performs power conversion on a secondary side of the transformer to convert AC power on the secondary side of the transformer to single-phase AC power. The second power conversion unit performs the power conversion using bidirectional switching elements, and switches the bidirectional switching elements in the first power conversion unit at a zero voltage by synchronizing with switching actions in the first power conversion unit. Consequently, a loss can be lessened by making the configuration simpler.

主权项

1. A power conversion device, comprising:
a transformer; a first power conversion circuit comprising a plurality of switching elements, the first power conversion circuit performing power conversion between DC power and AC power on a primary side of the transformer; a second power conversion circuit comprising a plurality of bidirectional switching elements, the second power conversion circuit performing power conversion between AC power on a secondary side of the transformer and single-phase AC power; and a control circuit configured to control switching actions of the bidirectional switching elements in the second power conversion circuit to be performed at a zero voltage by synchronizing the switching actions of the bidirectional switching elements in the second power conversion circuit to switching actions of the switching elements in the first power conversion circuit.