CONTROLLER FOR POWER SOURCE IN INDUCTION HEATING FOR ALLOYING

PURPOSE:To prevent generation of stripe patterns, which appear on a steel plate during induction heating, by changing the phase cyclicly by the output of a voltage detection circuit. CONSTITUTION:A phase control circuit 8, which controls the phase of a detected voltage signal cyclicly, is provided i...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KATO MITSUO, HIYAMA MAMORU, IZUMI KIYOSHI, HANAMOTO MIKIO, TSURUSAKI KAZUYA
Format:	Patent
Sprache:	eng
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 CHEMICAL SURFACE TREATMENT CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS 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 HEATING ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS 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 SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Beschreibung
Zusammenfassung:	PURPOSE:To prevent generation of stripe patterns, which appear on a steel plate during induction heating, by changing the phase cyclicly by the output of a voltage detection circuit. CONSTITUTION:A phase control circuit 8, which controls the phase of a detected voltage signal cyclicly, is provided in the middle of a voltage detection circuit to which the detected voltage signal is input from output side of a high frequency inverter 3. The phase control circuit 8 consists of a phase delay part 5, a phase advance part 6, and a delay phase control part 7. When the delay phase control part 7 is off, the quantity of phase control is zero, so the negative voltage is inverted with the resonant frequency of a load circuit 14, and the load currents of the above resonant frequency are let flow to the load circuit 14. On the other hand, when the phase control part 7 is on, the quantity of phase control becomes advance, and it performs commutation quickly as compared with when the quantity of phase control is zero, so the voltage phase inversion time after commutation becomes short, and frequency becomes high. Hereby, the frequency of the high frequency power source can be changed.