INNRETNING FOR KJEMISK-TERMISK BEHANDLING AV METALLISK MATERIALE VED GLIMUTLADNING

A circuit arrangement for controlling the power supply to a discharge chamber (9) comprises a power transformer (1) connectable to a power supply (2), two sequentially connected rectifying means (4 and 6) connected across the chamber (9) a short-circuiting element (7) connected across one rectifying...

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Bibliographische Detailangaben
Hauptverfasser:	MINTESCHEV, MINTSCHO SAVOV, SAVOV, SVETOSLAV ALEXANDROV
Format:	Patent
Sprache:	nor
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 BASIC ELECTRIC ELEMENTS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DIFFUSION TREATMENT OF METALLIC MATERIAL ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS ELECTRICITY EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERATION INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
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Beschreibung
Zusammenfassung:	A circuit arrangement for controlling the power supply to a discharge chamber (9) comprises a power transformer (1) connectable to a power supply (2), two sequentially connected rectifying means (4 and 6) connected across the chamber (9) a short-circuiting element (7) connected across one rectifying means (6) and control means (14). When the voltage across the chamber (9) surpasses a particular threshold voltage element (7) conducts. Control means (14, 15) switches off one rectifying means (6) when it senses this conduction. A second transformer (11) and a condenser (12) are connected across the chamber (9) and a thyristor 13 controlled by control means (14, 15) short circuits part of the second transformer (11) when an arc discharge in the chamber (9) occurs. The time necessary for cleaning work pieces is decreased, the power supplied differs little from the nominal power and the electric strength of the working chamber (9) is restored quickly. The productivity of the chamber (9) is increased.