EP 4205271 A1 20230705 - DEVICE AND METHOD FOR OPERATING A THREE-LEVEL OR MULTI-LEVEL CONVERTER
Title (en)
DEVICE AND METHOD FOR OPERATING A THREE-LEVEL OR MULTI-LEVEL CONVERTER
Title (de)
VORRICHTUNG UND VERFAHREN FÜR DEN BETRIEB EINES DREI- ODER MEHRPUNKTUMRICHTERS
Title (fr)
DISPOSITIF ET PROCÉDÉ DE FONCTIONNEMENT D'UN CONVERTISSEUR TRIPOINT OU MULTIPOINT
Publication
Application
Priority
- DE 102020122458 A 20200827
- EP 2021073726 W 20210827
Abstract (en)
[origin: CA3192871A1] The invention relates to a device (10) for balancing at least one intermediate potential of a DC link (12) for the operation of a three-level or multi-level inverter (34), wherein a half bridge (16) having at least two electronic switches (T1, T2) is connected between two basic-potential bars (ZK+, ZK-) of the DC link (12) and at least one intermediate-potential bar (14). Furthemore, a PWM switching generator (18) is designed to switch the two switches (T1, T2) in a variable duty cycle such that a desired intermediate potential, more particularly a symmetrical intermediate potential, of the intermediate-potential bar (14) can be set. According to the invention, the half bridge (16) is connected to the intermediate-potential bar (14) by means of a smoothing choke (Lt), and the smoothing choke (Lt) forms a coil side of an isolation transformer (20) for the operation of a direct-voltage power supply unit (22). The direct-voltage power supply unit (22) provides an internal voltage supply for the operation of the control electronics of the three-level or multi-level converter, more particularly of a fan for cooling. The invention also relates to a method for operating a device (10) of this type.
IPC 8 full level
H02M 1/00 (2006.01); H02M 1/32 (2007.01); H02M 3/335 (2006.01); H02M 7/48 (2007.01)
CPC (source: EP KR US)
H02M 1/0003 (2021.05 - KR); H02M 1/0006 (2021.05 - EP); H02M 1/007 (2021.05 - EP); H02M 1/009 (2021.05 - KR); H02M 1/327 (2021.05 - EP); H02M 3/33571 (2021.05 - EP KR); H02M 5/4585 (2013.01 - US); H02M 7/48 (2013.01 - EP); H02M 7/483 (2013.01 - KR); H02P 27/06 (2013.01 - KR)
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
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DE 102020122458 B3 20220203; CA 3192871 A1 20220303; CN 116349127 A 20230627; EP 4205271 A1 20230705; JP 2023540699 A 20230926; KR 20230056754 A 20230427; US 2023327572 A1 20231012; WO 2022043489 A1 20220303
DOCDB simple family (application)
DE 102020122458 A 20200827; CA 3192871 A 20210827; CN 202180066197 A 20210827; EP 2021073726 W 20210827; EP 21769124 A 20210827; JP 2023513555 A 20210827; KR 20237010263 A 20210827; US 202118023079 A 20210827