POWER CONVERTER AND POWER CONDITIONER

摘要

A power converter 1 includes a first conversion circuit 10 connected with a first winding n1 of a transformer 40, and a second conversion circuit 20 connected with a second winding n2 of the transformer 40. The first and second conversion circuits 10 and 20 are configured to perform bidirectional power conversion. The power converter further includes a third conversion circuit 30 that is a circuit provided at a pre-stage of the first conversion circuit 10 in a direction of transferring electric power toward the second conversion circuit 20 from the first conversion circuit 10. The third conversion circuit 30 is configured to perform bidirectional power conversion, and function as a boosting chopper circuit upon transferring electric power toward the second conversion circuit 20 from the first conversion circuit 10.

主权项

1. A power converter, comprising:
a first conversion circuit and a second conversion circuit configured to perform electric power conversion; a transformer for transferring electric power between the first and second conversion circuits; and a third conversion circuit that is a circuit provided at a pre-stage of the first conversion circuit in a direction of transferring electric power toward the second conversion circuit from the first conversion circuit, the third conversion circuit being configured to perform voltage conversion such that a voltage to be input to the first conversion circuit is higher than a voltage to be output from the second conversion circuit,wherein:
each of the first and second conversion circuits is configured to perform bidirectional DC/AC power conversion; and the third conversion circuit is configured to operate as a boosting chopper circuit during a time period of transferring electric power toward the second conversion circuit from the first conversion circuit, the third conversion circuit being configured to operate as a step-down chopper circuit during a time period of transferring electric power toward the first conversion circuit from the second conversion circuit.