EP 3788710 A1 20210310 - DEVICE AND METHOD FOR DIRECT-CURRENT SUPPLY
Title (en)
DEVICE AND METHOD FOR DIRECT-CURRENT SUPPLY
Title (de)
EINRICHTUNG UND VERFAHREN ZUR GLEICHSTROMVERSORGUNG
Title (fr)
DISPOSITIF ET PROCÉDÉ D'ALIMENTATION EN COURANT CONTINU
Publication
Application
Priority
EP 2018066369 W 20180620
Abstract (en)
[origin: WO2019242848A1] The invention relates to a device (2) and to a method for direct-current supply, which device can be connected to an power grid (4) with a polyphase AC voltage (U1ac) with a first frequency (N1), having a multistage current converter (MMC) with a plurality of phase modules (19) which are each formed from a plurality of two-pole submodules (21) which are connected electrically in series and which each have a plurality of semiconductor switches (S) and an energy store (23a), having an actuating unit (7) which generates actuation signals (11) for controlling the multistage current converter (MMC), and having a rectifier circuit (18a). In order to achieve a low-loss direct-current supply (direct-current source), in particular for the medium-voltage range and for high powers, it is proposed that the multistage current converter (MMC) converts the polyphase first AC voltage (U1ac) into a single-phase or a polyphase second AC voltage (U2ac) with a larger second frequency (N2), that at least one transformer (17a, 17b) is connected to the multistage current converter (MMC) which transforms the second AC voltage (U2ac) into a third AC voltage (U3ac) of the same frequency (N2) and phase number, wherein the third AC voltage (U3ac) is smaller than the first AC voltage (U1ac), and that the rectifier circuit (18a, 18b, 18c, 18d) is connected to the at least one transformer (17a, 17b) and converts the third AC voltage (U3ac) into a DC voltage (Udc).
IPC 8 full level
H02M 7/483 (2007.01); H02M 5/12 (2006.01); H02M 5/14 (2006.01); H02M 5/16 (2006.01); H02M 5/22 (2006.01); H02M 7/49 (2007.01)
CPC (source: EP US)
H02M 5/12 (2013.01 - EP); H02M 5/14 (2013.01 - EP); H02M 5/16 (2013.01 - EP); H02M 5/225 (2013.01 - EP); H02M 7/483 (2013.01 - EP US); H02M 7/4835 (2021.05 - EP US); H02M 7/49 (2013.01 - EP)
Citation (search report)
See references of WO 2019242848A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 2018066369 W 20180620; EP 18738205 A 20180620