Bidirektionaler Gleichstromwandler

Details

Veröffentlichungs-Nr.

EP2720365

Aktenzeichen

EP13180994

Anmeldetag

20. August 2013

Veröffentlichung

12. Februar 2020

Erteilung

12. Februar 2020

Rechtsraum

EP

IPC

H02M3/335H02M3/337

Abstract

A bi-directional DC/DC converter comprises: bridge circuits 18 and 19 connected to DC voltage sources 1 and 2, an isolation transformer 17 isolating respective AC sides of the bridge circuits, an LC resonance circuit disposed between the AC side of the bridge circuit 18 and the isolation transformer and/or an LC resonance circuit disposed between the AC side of the bridge circuit 19 and the isolation transformer, detection circuits 20 and 21 for detecting voltages and currents of the DC voltage sources 1 and 2, control circuits 22 and 23 for controlling semiconductor switching elements 5 through 12. Each of the control circuits 22 and 23 comprises respective control means 22a and 23a for fixed frequency control at around the resonance frequency fr and respective control means 22b and 23b for performing frequency modulation control at a frequency lower than the resonance frequency fr. The control circuit 22, in the power flow from the second DC voltage source 1 to the second DC voltage source 2, changes over between the fixed frequency control and the frequency modulation control according to the magnitude of the control variable 22c, and the control circuit 23, in the power flow from the second DC voltage source 2 to the second DC voltage source 1, changes over between the fixed frequency control and the frequency modulation control according to the magnitude of the control variable 23c. Thus, the bi-directional DC/DC converter can be applied to devices with a wide range of input and output voltages.

Anmelder

Firma

Fuji Electric Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete