Redundanz einer Resonanten Umsetzerstufe durch Frequenzanpassung

Details

Veröffentlichungs-Nr.

EP3796529

Aktenzeichen

EP19198721

Anmeldetag

20. September 2019

Veröffentlichung

27. Dezember 2023

Erteilung

27. Dezember 2023

Rechtsraum

EP

IPC

H02M3/00H02M3/335// H02M7/493H02M7/48H02M1/32H02M1/00

Abstract

A resonant DC/DC comprises: a first DC link, preferably comprising a first DC link capacitor; a DC/AC converter comprising a first plurality of N>1 converter bridges connected in parallel to the first DC link; each converter bridge comprising a plurality of switches each of which may be switched between a conducting state and a non-conducting state; an AC intermediate circuit having an input connected to an output of the DC/AC converter and comprising: a transformer, preferably a medium frequency transformer, having a primary side and a secondary side; with the primary side comprising at least one primary winding; a first plurality of N capacitors, wherein for each converter bridge, a different one from the first plurality of capacitors is connected between said converter bridge and the at least one primary winding; a control unit configured to switch semiconductor switches of the inverter bridges between the conducting and the non-conducting state or vice versa with a predetermined first switching frequency to supply an AC current and/or voltage to the AC intermediate circuit; a plurality of N current sensing means, wherein for each inverter bridge a different one of the plurality of current sensing means is provided for monitoring a current through said inverter bridge; wherein the control unit is configured to determine whether a current through one of the inverter bridges deviates from an expected value; and to adapt, in particular increase, the predetermined first switching frequency the current through one of the inverter bridges deviates from the expected value.

Anmelder

Firma

ABB Schweiz AG

Land

🇨🇭 Schweiz

Fachgebiete