EP0062926A1 - Appareil de chauffage par induction - Google Patents

Appareil de chauffage par induction Download PDF

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Publication number
EP0062926A1
EP0062926A1 EP82103183A EP82103183A EP0062926A1 EP 0062926 A1 EP0062926 A1 EP 0062926A1 EP 82103183 A EP82103183 A EP 82103183A EP 82103183 A EP82103183 A EP 82103183A EP 0062926 A1 EP0062926 A1 EP 0062926A1
Authority
EP
European Patent Office
Prior art keywords
output terminals
matching board
inductive heating
heating coils
heating device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82103183A
Other languages
German (de)
English (en)
Other versions
EP0062926B1 (fr
Inventor
Toru C/O Toyo Tanso Co. Ltd. Hoshikawa
Yoshihiko C/O Mitsubishi Denki K.K. Osaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Tanso Co Ltd
Mitsubishi Electric Corp
Original Assignee
Toyo Tanso Co Ltd
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Tanso Co Ltd, Mitsubishi Electric Corp filed Critical Toyo Tanso Co Ltd
Publication of EP0062926A1 publication Critical patent/EP0062926A1/fr
Application granted granted Critical
Publication of EP0062926B1 publication Critical patent/EP0062926B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/08—Control, e.g. of temperature, of power using compensating or balancing arrangements

Definitions

  • the present invention relates to an inductive heating device in which current supply is effected selectively to inductive heating coils.
  • FIG. 1 A conventional inductive heating device of the same general type to which the invention pertains is shown in Fig. 1.
  • reference numeral 1 designates a plurality of heating coils
  • 2 switches for selectively activating the heating coils
  • 3 power-factor enhancing capacitors forming a parallel resonance circuit for compensating for the lag power factors of the heating coils 1,
  • 4 a matching board on which the capacitors 3 are mounted
  • 5 a power source for supplying electrical power to the input terminal 6 of the matching board 4
  • thermoelectric heating-device workpieces to be heated (not shown) are placed inside the heating coils.
  • a processing cycle of loading a workpiece, heating the workpiece, cooling the workpiece and loading another workpiece is employed.
  • switches 2 are provided to selectively swith the heating coils 1, with one switch being closed to connect a single coil to the matching board at any time.
  • heating coils 1 having, for example, a diameter of 500 to 3000 mm and a length of 500 to 5000 mm are provided and current is suppled to one heating coil at a time, sometimes it is impossible to supply current effectively to the heating coil which is farthest from the matching board 4 because of power transmission losses caused by power line voltage drops.
  • an inductive heating device in which a plurality of heating coils 1 are selectively connected to a matching board 4 provided with at least one capacitor 3 for inductive heating of a workpiece, chracterized in that a plurality of output terminals 10 to 15 are provided on said matching board 4 for respective ones of said heating coils 1 , said output terminals being connected directly to said at least one capacitor.
  • An inductive heating coil arrangement in which a common current collecting line which collects the currents of various capacitors serves as a current supply line for.supplying current to the plural heating coils, thereby decreasing the power line voltage drop.
  • reference numerals 1 through 6 and 8 designate components identified by the same reference numerals as in Fig. 1.
  • Reference numerals 10 through 15 designate output terminal pairs which are provided on the matching board 4 and are connected to the current collecting line 8. The pairs of output terminals 10 through 15 are connected through the switches 2 to corresponding ones of the heating coils 1.
  • the common current collecting line 8 merely functions to collect the currents from the various capacitors 3.
  • the common current collecting line 8 serves as the current supplying lines (which are also provided in the conventional device) because a plurality of output terminals 10 through 15, each of which can be, selectively connected to a separate one of the heating coils 1, are provided on the matching board 4.
  • connections are also provided directly between adjacent ones of said output terminals, i.e. one line of terminal pair 10 would be connected to the corresponding line 11 and so on.
  • connecting bus bars can be employed instead of the switches 2.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
EP19820103183 1981-04-15 1982-04-15 Appareil de chauffage par induction Expired EP0062926B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP54295/81U 1981-04-15
JP5429581U JPS6324634Y2 (fr) 1981-04-15 1981-04-15

Publications (2)

Publication Number Publication Date
EP0062926A1 true EP0062926A1 (fr) 1982-10-20
EP0062926B1 EP0062926B1 (fr) 1987-08-12

Family

ID=12966571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820103183 Expired EP0062926B1 (fr) 1981-04-15 1982-04-15 Appareil de chauffage par induction

Country Status (3)

Country Link
EP (1) EP0062926B1 (fr)
JP (1) JPS6324634Y2 (fr)
DE (1) DE3276996D1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1185744B (de) * 1958-04-14 1965-01-21 Aeg Induktionsanlage mit mindestens zwei ueber eine Sammelschiene gespeisten Heizstationen mit mehreren aufeinanderfolgenden, mit verschiedenen Leistungen und unterschiedlichen Frequenzen arbeitenden Erwaermungszonen zum regelbaren Erwaermen von metallischen Werkstuecken

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1185744B (de) * 1958-04-14 1965-01-21 Aeg Induktionsanlage mit mindestens zwei ueber eine Sammelschiene gespeisten Heizstationen mit mehreren aufeinanderfolgenden, mit verschiedenen Leistungen und unterschiedlichen Frequenzen arbeitenden Erwaermungszonen zum regelbaren Erwaermen von metallischen Werkstuecken

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
LEW-NACHRICHTEN, no. 17, 1975, pages 27-30, VEB Lokomotivbau-Elektrotechnische Werke 'Hans Beimler', 1422 Hennigsdorf (DE); *

Also Published As

Publication number Publication date
JPS6324634Y2 (fr) 1988-07-06
DE3276996D1 (en) 1987-09-17
JPS57167590U (fr) 1982-10-22
EP0062926B1 (fr) 1987-08-12

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