FAN CAPACITY REGULATOR FOR ALTERNATING-CURRENT LOCOMOTIVE

FIELD: electrical engineering; ac consists. ^ SUBSTANCE: proposed device designed to regulate capacity of fans driven by three-phase induction motors has traction transformer 1 with its primary winding 2 connected to supply mains, auxiliary winding 4 with terminal and intermediate leads, frequency c...

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Bibliographische Detailangaben
Hauptverfasser:	RABINOVICH MIKHAIL DANIILOVICH, KRIVNOJ ALEKSANDR MIKHAJLOVICH, JARETS VALERIJ VLADIMIROVICH, PARSHIN ANDREJ NIKOLAEVICH, LITOVCHENKO VIKTOR VASIL'EVICH
Format:	Patent
Sprache:	eng ; rus
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 CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROL OR REGULATION THEREOF CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	FIELD: electrical engineering; ac consists. ^ SUBSTANCE: proposed device designed to regulate capacity of fans driven by three-phase induction motors has traction transformer 1 with its primary winding 2 connected to supply mains, auxiliary winding 4 with terminal and intermediate leads, frequency converter built around four thyristors, and control unit 9 whose outputs are connected to control inputs of thyristors. The latter are interconnected in two groups, each having two series-connected thyristors, and are connected to terminal leads of auxiliary winding. One thyristor group is connected to winding cumulatively and other group, differentially. Three-phase induction motor 10 is characterized in enhanced number of low-speed steps; its first phase lead is connected to common point of first-group thyristors, its second phase lead, to common point of second-group thyristors, and third phase lead, to intermediate lead of auxiliary winding. ^ EFFECT: enlarged range of fan capacity regulation by load current, reduced cost of locomotive auxiliary power. ^ 1 cl, 1 dwg