INDUCTION HEATING DEVICE

PROBLEM TO BE SOLVED: To provide an induction heating device discriminating an object to be heated into that made of metal with low resistance like aluminum, that with a load unsuitable for induction heating (small article load or no load), and that made of the other metal. SOLUTION: A control means...

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Bibliographic Details
Main Authors NIIYAMA KOJI, FUJITA ATSUSHI, FUJII YUJI, MIYAUCHI TAKAHIRO, HIROTA MOTONARI
Format Patent
LanguageEnglish
Published 17.06.2004
Edition7
Subjects
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 THEREOF
CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
GENERATION
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Summary:PROBLEM TO BE SOLVED: To provide an induction heating device discriminating an object to be heated into that made of metal with low resistance like aluminum, that with a load unsuitable for induction heating (small article load or no load), and that made of the other metal. SOLUTION: A control means 44 discriminates the material of the object to be heated 34 into a first material having high resistance, a second material having low resistance, and a third material without load or nearly the same therewith by sweeping a driving frequency from a first frequency to a second frequency which should make the output of an inverter 35 smaller than that of switching elements 32, 37 within variable range of the driving frequency at the frequency of 1/n times a resonance frequency. By this, that they are either of quality of the materials is distinguished. COPYRIGHT: (C)2004,JPO
Bibliography:Application Number: JP20020336454