Current limiter

H - Electricity – 02 – H

Patent

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Details

H02H 9/02 (2006.01) H03K 17/08 (2006.01) H03K 17/082 (2006.01) H03K 17/687 (2006.01)

Patent

CA 2171186

The invention relates to a device for limiting overload currents using a semiconductor element (1) with at least one controllable semiconductor (3) with electron source (source), electron acceptor (drain) and electron-flow control electrode (gate) that has characteristic curves typical of a field effect transistor (FET:3). In the case of alternating voltage, two FETs are connected antiserially. Means are provided so that the control voltage needed to drive the semiconductor element (1) can be derived internally from at least a part of the load current and/or from at least a part of the voltage drop over the semiconductor element.

Limiteur de courant destiné à limiter des surintensités au moyen d'un élément semi-conducteur (1) comprenant au moins un semi-conducteur contrôlable (3) comportant une source d'électrons (source), un collecteur d'électrons (drain) et l'électrode de commande contrôlant le flux électronique (grille), présentant des courbes caractéristiques du type d'un transistor à effet de champ (FET;3). Dans le cas d'une tension alternative, deux FET sont branchés de façon antisérielle. Des moyens sont prévus pour l'obtention interne de la tension nécessaire pour l'excitation de l'élément semi-conducteur (1) à partir d'au moins une partie du courant de charge et/ou au moins d'une partie de la chute de tension au niveau de l'élément semi-conducteur.

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