AN ELECTRICAL APPARATUS AND A LIMITING METHOD

An electrical apparatus for limiting the peak voltage across a recttifying member (23) of a current valve arranged in a circuit having a substantial inductance (24) and having at least one controllable semiconductor device (22) and at least one said rectifying member (23) connected in anti-parallel...

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Bibliographische Detailangaben
Hauptverfasser:	JOHANSSON, NICKLAS, AL-HOSINI, FALAH, LUNDBERG, PETER, BIJLENGA, BO
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS BASIC ELECTRONIC CIRCUITRY CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION PULSE TECHNIQUE
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Beschreibung
Zusammenfassung:	An electrical apparatus for limiting the peak voltage across a recttifying member (23) of a current valve arranged in a circuit having a substantial inductance (24) and having at least one controllable semiconductor device (22) and at least one said rectifying member (23) connected in anti-parallel therewith when the rectifying member is turning off, comprises means (28, 29) adapted to control the semiconductor device so as to increase the conductivity thereof during turning off of the rectifying member. L'invention concerne un appareil électrique destiné à limiter la tension de crête sur un élément de redressement (23) d'une vanne de courant disposée dans un circuit présentant une inductance importante (24) et comprenant au moins un dispositif à semi-conducteur commandable (22) et au moins un élément de redressement (23) connecté de manière antiparallèle à ce dispositif lors de sa mise hors tension. Ledit appareil électrique comprend une unité (28, 29) conçue pour commander le dispositif à semi-conducteur de façon à en augmenter la conductivité pendant la mise hors tension de l'élément de redressement.