Converter circuit arrangement having a dc intermediate circuit

Details Converter circuit arrangement having a dc intermediate circuit Converter circuit arrangement having a dc intermediate circuit

H - Electricity

02

M

H02M 1/12 (2006.01) H02M 5/40 (2006.01)

Patent

CA 2313094

The invention relates to a converter connection assembly with a direct voltage intermediate circuit (3) containing a transformer (8) with at least two windings (9 and 10). The transformer is connected in the intermediate circuit (3) in such a way that the undesired, asymmetric current components lead to a magnetization of the transformer core, and are thus suppressed. A grounded LC filter (Lf, Cf) is connected in front of the load (6). The filter effects a sinusoidal voltage on the load (6). As a result, the connection can be utilized with any polyphase machines and also during the expansion of existing systems.

L'invention concerne un ensemble circuit convertisseur de courant présentant un circuit intermédiaire à tension continue (3), ledit ensemble comportant un transformateur (8) avec au moins deux enroulements (9 et 10). Ce transformateur est monté dans le circuit intermédiaire (3) de sorte que les composantes du courant asymétriques indésirables entraînent une magnétisation du noyau du transformateur et sont ainsi éliminées. En amont de la charge (6) est monté un filtre LC (Lf, Cf), mis à la terre, qui entraîne l'application d'une tension sinusoïdale au niveau de la charge (6). Le circuit peut ainsi être utilisé avec n'importe quelle machine à champ tournant et par conséquent lors de l'extension d'installations existantes.

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