Quasi-resonant direct-current voltage transducer
The invention relates to the electrical engineering and is meant for creating powerful, adjustable resonance voltage transducers of different application, namely for cathodic protection installations working at higher temperatures with self-cooling, welding converters and induction heating systems.T...
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Zusammenfassung: | The invention relates to the electrical engineering and is meant for creating powerful, adjustable resonance voltage transducers of different application, namely for cathodic protection installations working at higher temperatures with self-cooling, welding converters and induction heating systems.The quasi-resonant direct-current voltage transducer contains a half-bridge support of transistors (1, 2), the collector of a transistor (1) is connected to a terminal of the primary windings (4-1, 4-2), connected in series opposition, of an output transformer (4), with a high prescribed value of mutual leakage inductance, the second terminal of which is connected to one terminal of a power supply (3), and the emitter of the second transistor (2) is connected to the second terminal of the power supply (3). The transducer also contains a resonance capacitor (5), one terminal of which is connected to the mean terminal of the half-bridge support, and the second - to the mean terminal of the primary windings (4-1, 4-2) of the output transformer (4), the outputs of the secondary windings of which, made with prescribed inductance value, are connected through rectifiers (6-1, 6-2) to a common load (7).
Invenţia se referă la electrotehnică şi este destinată pentru realizarea convertizoarelor de tensiune de mare capacitate cu cvasirezonanţă , reglabile, cu aplicare diversă, şi anume pentru staţiile de protecţie catodică, care funcţionează la temperaturi ridicate cu răcire naturală, convertizoarele de sudură, instalaţiile de încălzire inductivă.Convertizorul de tensiune continuă cu cvasirezonanţă conţine un suport semipunte cu două tranzistoare (1, 2), colectorul unui tranzistor (1) este conectat la o bornă a bobinelor primare (4-1, 4-2), unite consecutiv în sens contrar, a unui transformator de ieşire (4), cu o inductivitate reciproca de disipare ridicată de o valoare prestabilită, a doua bornă a cărora este conectată la o bornă a unei surse de alimentare (3), iar emiterul celui de-al doilea tranzistor (2) este conectat la a doua bornă a sursei de alimentare (3). Convertizorul mai conţine un condensator de rezonanţă (5), o bornă a căruia este conectată la borna medie a suportului semipunte, iar cea de-a doua - la borna comună a bobinelor primare (4-1, 4-2) a transformatorului de ieşire (4), ieşirile bobinelor secundare ale căruia, executate cu o inductivitate de o valoare prestabilită, sunt conectate prin nişte redresoare (6-1, 6-2) la o sarcină comună (7).
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