Global Patent Index - EP 0898357 B8

EP 0898357 B8 2009-02-18 - DC energy converter device

Title (en)

DC energy converter device

Title (de)

Gleichstromwandlervorrichtung

Title (fr)

Dispositif de conversion d'énergie à courant continu

Publication

EP 0898357 B8 (FR)

Application

EP 98402089 A

Priority

FR 9710538 A

Abstract (en)

[origin: EP0898357A1] Two cyclically switched converter circuits (4,15) based on bridge-connected IGB transistors, are coupled through a transformer (1), one operating as an inverter, the other as a rectifier, supplying a load. Each bridge arm comprises an IGB transistor (5,6,7,8;16,17,18,19) with a diode (9,10,11,12;20,21,22,23) connected across emitter and collector. Externally, bridges are connected respectively to an incoming DC supply (VI) and a load, operating, typically, at a lower voltage. Energy is stored on the secondary side in a series inductance (25), part or all of which is obtained by utilising the transformer leakage reactance. Output voltage control below a maximum determined by the transformer transformation ratio is obtained by varying the switching angle of the inverter bridge transistors. Higher output voltages can be obtained by similar intervention, at the same operating frequency, in the rectifier bridge. The transformer may be either 1-ph or 3-ph.

IPC 8 full level (invention and additional information)

H02M 3/335 (2006.01)

CPC (invention and additional information)

H02M 3/33584 (2013.01)

Designated contracting state (EPC)

BE CH DE GB IT LI NL

DOCDB simple family

EP 0898357 A1 19990224; EP 0898357 B1 20081119; EP 0898357 B8 20090218; DE 69840222 D1 20090102; FR 2767612 A1 19990226; FR 2767612 B1 20020614; US 6067237 A 20000523