EQUIPMENT FOR MEDIUM VOLTAGE SUPPLY OF ASYNCHRONOUS MOTORS

The invention relates to an equipment for supplying asynchronous motors with medium voltage, meant to modify their speeds. According to the invention, the equipment comprises a step down transformer (TCT) connected to the medium or high voltage network, supplying a three-phase rectifier (RT) furnish...

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Bibliographische Detailangaben
Hauptverfasser: BAB EU RADU MIHNEA, MUNTEAN NICOLAE, TUDORAN CONSTANTIN ADRIAN, L EZ ERESCU EMIL CORIOLAN, BOLDEA ION GHEORGHE
Format: Patent
Sprache:eng ; rum
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Zusammenfassung:The invention relates to an equipment for supplying asynchronous motors with medium voltage, meant to modify their speeds. According to the invention, the equipment comprises a step down transformer (TCT) connected to the medium or high voltage network, supplying a three-phase rectifier (RT) furnishing a direct current voltage supply, a threephase inverter (IJT), at the output of which a LC-type low-pass filter (FTJ) is connected in series with a step up transformer (TRC) in the secondary of which a selector (S1) is connected, said selector allowing the alternative connection of medium voltage asynchronous motors (M1, M2...Mn). Invenţia se referă la un echipament pentru alimentarea motoarelor electrice asincrone, la medie tensiune, destinat modificării turaţiei acestora.Echipamentul conform invenţiei este alcătuit dintr-un transformator coborâtor de tensiune (TCT), conectat la reţeaua de medie sau înaltă tensiune, care alimentează un redresor trifazat (RT), ce furnizează o tensiune continuă de alimentare,unui invertor trifazat (IJT), la ieşirea căruia este conectat un filtru trece-jos (FTJ) de tip LC, în serie cu un transformator ridicător de tensiune (TRC), în secundarul căruia este conectat un selector (S1) ce permite conectarea alternativă a motoarelor electrice asincrone, de medie tensiune (M1, M2, ... Mn).