Automatic fault current protection for a locomotive...

B - Operations – Transporting – 60 – L

Patent

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Details

B60L 3/04 (2006.01) B60L 3/00 (2006.01) H02H 7/08 (2006.01)

Patent

CA 2174095

A fault current protection system for a traction vehicle propulsion system including a synchronous generator having armature (15) and field windings (12) and power conditioning circuitry (65) connecting the generator armature windings to a traction motor employs a normally charged capacitor (72) which, in response to a fault signal resulting from excess current in the generator armature windings, is electrically switched into parallel with the excitation current source connected to the generator field windings so as to discharge through the generator windings and commutate the excitation current source.

Dispositif de protection contre un courant de défaut conçu pour un système de propulsion d'un véhicule de traction et comprenant un générateur synchrone possédant des enroulements d'induit (15) et de champ (12), ainsi qu'un circuit de conditionnement de puissance (65) couplant les enroulements d'induit du générateur à un moteur de traction. Ce dispositif utilise un condensateur normalement chargé (72) qui, en réaction à un signal de défaut provenant d'un excès de courant dans les enroulements d'induit du générateur, est commuté électriquement sur un branchement parallèle à la source de courant d'excitation reliée aux enroulements de champ du générateur, de manière à se décharger à travers les enroulements du générateur et à commuter la source de courant d'excitation.

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