AUTOMATIC FLASHOVER PROTECTION FOR LOCOMOTIVE TRACTION MOTORS

AUTOMATIC FLASHOVER PROTECTION FOR LOCOMOTIVE TRACTION MOTORS

Flashover protection is provided for a locomotive propulsion system including a plurality of d-c traction motors (15, 16) each having a commutator (15A) subject to flashovers. A flashover detector (32) is provided for producing a fault signal in case a flashover occurs. In response to the fault sign...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: BALCH, EDGAR THOMAS, BAILEY, RONALD BARRY, HUCZKO, ROGER D, LAUKAITIS, JOSEPH ANDREW, SMITH, MYRON LEE, BROWN, HERBERT JOSEPH
Format: Patent
Sprache:eng ; fre
Schlagworte:
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
GENERATION
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Beschreibung
Zusammenfassung:Flashover protection is provided for a locomotive propulsion system including a plurality of d-c traction motors (15, 16) each having a commutator (15A) subject to flashovers. A flashover detector (32) is provided for producing a fault signal in case a flashover occurs. In response to the fault signal, a solid-state controllable electric valve (71) connected between the excitation current source (17) and the alternator field winding (12f) is changed to non-conducting state, whereupon the magnitude of excitation current in the alternator field winding (12f) is rapidly reduced toward zero and the alternator's output current is correspondingly decreased whenever a flashover occurs.