EP0100441A1 - Dispositif pour le chauffage à induction d'une pièce usinée au moyen d'inducteurs multiples - Google Patents

Dispositif pour le chauffage à induction d'une pièce usinée au moyen d'inducteurs multiples Download PDF

Info

Publication number
EP0100441A1
EP0100441A1 EP83106406A EP83106406A EP0100441A1 EP 0100441 A1 EP0100441 A1 EP 0100441A1 EP 83106406 A EP83106406 A EP 83106406A EP 83106406 A EP83106406 A EP 83106406A EP 0100441 A1 EP0100441 A1 EP 0100441A1
Authority
EP
European Patent Office
Prior art keywords
inverter
inverted
parallel
inverters
extinguishing
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
EP83106406A
Other languages
German (de)
English (en)
Other versions
EP0100441B1 (fr
Inventor
Hans G. Dipl.-Ing. Matthes
Erhard Mauler
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.)
SMS Elotherm GmbH
Original Assignee
AEG Elotherm GmbH
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 AEG Elotherm GmbH filed Critical AEG Elotherm GmbH
Priority to AT83106406T priority Critical patent/ATE22382T1/de
Publication of EP0100441A1 publication Critical patent/EP0100441A1/fr
Application granted granted Critical
Publication of EP0100441B1 publication Critical patent/EP0100441B1/fr
Expired legal-status Critical Current

Links

Images

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

Definitions

  • the invention relates to a device for inductive heating of a workpiece by means of several inductors in accordance with the features of the preamble of claim 1.
  • the smallest extinguishing time or the smallest extinction angle of the various inverters is determined by means of an extreme value selector and depending on this smallest extinguishing time or At the smallest extinction angle, the inverters are driven at the same frequency. This ensures that all inverters start up synchronously (DE-OS 3 040 820).
  • the network is replaced by filter circuits and the DC link choke compared to twice the inverter frequency of e.g. 300 Hz and its harmonics are shielded. At frequencies above 300 Hz, these shielding measures are sufficient even at high powers. With a double inverter frequency of 300 Hz and below, however, harmful effects can occur at high powers because the filter circuits for filtering the harmonics and the line impedance form a resonance circuit with a resonance frequency that is below or between the frequencies of the filter circuits.
  • the invention has for its object to provide a device for inductive heating of a workpiece by means of several inductors, which can be operated at low frequency with high powers.
  • the individual parallel resonant circuits treat one and the same workpiece, for example the weld seam of a pipe
  • the individual parallel resonant circuits are magnetically coupled via the workpiece. This magnetic coupling changes during operation when the individual inductors approach each other locally.
  • the swinging of the inverters when switching on is problematic with such devices.
  • These difficulties can be, however, also fixed at phase-shifted ignition pulses with the measures known per se characterized in that the clearing condition regulator is controlled by an extreme value selector, the measured values of the erase time and the extinction angle at whose inputs of each inverter to a '.Ausplic the invention, and which selects the smallest of these measured values and places it at the input of the extinguishing condition controller.
  • a three-phase rectifier bridge D fully controlled by a current and voltage regulator and equipped with thyristors supplies, via a smoothing choke L, direct current to a plurality of inverters W 1 , W 2 connected in parallel and also equipped with thyristors. Other inverters could be connected in parallel. All inverters W 1 , W 2 are assigned: a common quenching condition controller LR, which delivers ignition pulses to the various inverters W 1 , W 2 via two outputs. The quenching condition controller LR supplies the inverters W 1 , W 2 with ignition pulses of the same frequency but with a II phase offset for n inverters.
  • An extreme value selector E is arranged in front of the extinguishing condition regulator LR, which supplies the phase-shifted ignition pulses, at the inputs of which measuring devices Z 1 , Z 2 for the extinguishing time are located in the respective inverters W 1 , W 2 .
  • the extreme value selector E selects the smallest extinguishing time and sends it as an actual value to the extinguishing condition controller LR. This ensures that the individual inverters W 1 , W 2 are operated with phase-shifted ignition pulses of one and the same frequency, which is based on the shortest extinguishing time, so that all inverters W 1 , W 2 start to oscillate.
  • each inverter W 1, W 2 associated measuring means Z 1, Z 2 are omitted for the extinguishing times and the extreme-value selector e.
  • only one measuring device Z 1 is provided, the output signal of which is immediately connected to the extinguishing condition controller LR.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Inverter Devices (AREA)
EP83106406A 1982-07-02 1983-07-01 Dispositif pour le chauffage à induction d'une pièce usinée au moyen d'inducteurs multiples Expired EP0100441B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83106406T ATE22382T1 (de) 1982-07-02 1983-07-01 Einrichtung zur induktiven erwaermung eines werkstueckes mittels mehrerer induktoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3224738 1982-07-02
DE3224738A DE3224738C1 (de) 1982-07-02 1982-07-02 Einrichtung zur induktiven Erwaermung eines Werkstueckes mittels mehrerer Induktoren

Publications (2)

Publication Number Publication Date
EP0100441A1 true EP0100441A1 (fr) 1984-02-15
EP0100441B1 EP0100441B1 (fr) 1986-09-17

Family

ID=6167430

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106406A Expired EP0100441B1 (fr) 1982-07-02 1983-07-01 Dispositif pour le chauffage à induction d'une pièce usinée au moyen d'inducteurs multiples

Country Status (4)

Country Link
EP (1) EP0100441B1 (fr)
JP (1) JPS5968193A (fr)
AT (1) ATE22382T1 (fr)
DE (1) DE3224738C1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0817531A2 (fr) * 1996-06-26 1998-01-07 Balay S.A. Topologie flexible et reconfigurable
EP0844807A1 (fr) * 1996-11-21 1998-05-27 Balay S.A. Commande optimale de la puissance installée dans une foyer de cuisson par induction avec une topologie reconfigurable
WO2000035248A1 (fr) * 1998-11-26 2000-06-15 Linlan Induction Ab Dispositif de chauffage par induction et son procede de commande

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3710085C2 (de) * 1987-03-27 1994-07-21 Asea Brown Boveri Einrichtung zur induktiven Erwärmung eines Werkstückes mittels mehrerer Induktoren

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2521941A1 (de) * 1974-05-17 1975-11-20 Matsushita Electric Ind Co Ltd Induktions-heizvorrichtung
DE2559519A1 (de) * 1974-06-17 1977-03-10 Matsushita Electric Ind Co Ltd Induktionsheizgeraet
DE2937941A1 (de) * 1978-09-21 1980-03-27 Matsushita Electric Ind Co Ltd Induktionserwaermungsvorrichtung
DE3040820A1 (de) * 1980-10-30 1982-05-13 Aeg-Elotherm Gmbh, 5630 Remscheid Einrichtung zur induktiven beheizung eines werkstuecks mittels mehrerer induktoren und mehrerer umrichterstromquellen zur speisung der induktoren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2521941A1 (de) * 1974-05-17 1975-11-20 Matsushita Electric Ind Co Ltd Induktions-heizvorrichtung
DE2559519A1 (de) * 1974-06-17 1977-03-10 Matsushita Electric Ind Co Ltd Induktionsheizgeraet
DE2937941A1 (de) * 1978-09-21 1980-03-27 Matsushita Electric Ind Co Ltd Induktionserwaermungsvorrichtung
DE3040820A1 (de) * 1980-10-30 1982-05-13 Aeg-Elotherm Gmbh, 5630 Remscheid Einrichtung zur induktiven beheizung eines werkstuecks mittels mehrerer induktoren und mehrerer umrichterstromquellen zur speisung der induktoren

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0817531A2 (fr) * 1996-06-26 1998-01-07 Balay S.A. Topologie flexible et reconfigurable
EP0817531A3 (fr) * 1996-06-26 1998-04-08 Balay S.A. Topologie flexible et reconfigurable
ES2128941A1 (es) * 1996-06-26 1999-05-16 Balay Sa Circuito inversor de configuracion variable.
EP0844807A1 (fr) * 1996-11-21 1998-05-27 Balay S.A. Commande optimale de la puissance installée dans une foyer de cuisson par induction avec une topologie reconfigurable
WO2000035248A1 (fr) * 1998-11-26 2000-06-15 Linlan Induction Ab Dispositif de chauffage par induction et son procede de commande

Also Published As

Publication number Publication date
ATE22382T1 (de) 1986-10-15
EP0100441B1 (fr) 1986-09-17
DE3224738C1 (de) 1984-02-09
JPS5968193A (ja) 1984-04-18

Similar Documents

Publication Publication Date Title
DE2831093C2 (fr)
DE2824326C2 (fr)
DE1962358A1 (de) Lichtbogen-Schweissgeraet
EP0282961B1 (fr) Onduleur pour alimenter une charge avec composante inductive
DE4128175C2 (de) Lichtbogenschweißgerät
EP0100441B1 (fr) Dispositif pour le chauffage à induction d'une pièce usinée au moyen d'inducteurs multiples
DE3400580C3 (de) Wechselspannungsgespeiste Gleichstromquelle mit nachgeschaltetem Wechselrichter
CH642493A5 (de) Uebertragungsanlage fuer hochgespannten gleichstrom.
EP0026374A1 (fr) Dispositif pour le transfert d'énergie électrique de grande puissance d'un réseau d'alimentation triphasé à fréquence plus élevée à un réseau de charge monophasé à fréquence plus basse
DE2322924A1 (de) Saettigungsdrossel
DE3040820C2 (de) Einrichtung zur induktiven Beheizung eines Werkstückes mittels mehrerer Induktoren
WO1994014220A1 (fr) Procede et dispositif de determination des nombres ordinaux de courants d'harmoniques non caracteristiques et de compensation de ceux-ci
DE2853619C2 (de) Stromrichteranordnung
DE3034286A1 (de) Roentgendiagnostikgenerator mit einem den hochspannungstransformator speisenden wechselrichter
EP0642201A1 (fr) Installation de transmission haute tension à courant continu
DE705021C (de) Steuereinrichtung fuer mit gittergesteuerten Dampf- oder Gasentladungsstrecken arbeitende Wechselrichter
DE2455765B1 (de) Verfahren und vorrichtung zur stufenlosen steuerung oder regelung der drehzahl und/oder des drehmoments einer drehstrom-asynchronmaschine, die von einem zwischenkreisumrichter gespeist ist
DE646351C (de) Schaltanordnung zur Aufhebung der Rueckwirkungen von Umrichtern oder Gleichrichtern auf das speisende Netz
DE652724C (de) Anordnung zur Verbesserung der Kommutierungsverhaeltnisse bei mit gittergesteuerten Dampf- oder Gasentladungsstrecken arbeitenden Wechselrichtern in Parallelanordnung
DE19514537B4 (de) Verfahren zur Ansteuerung der Stromrichterventile von gleichstromseitig in Reihe geschalteten Parallelschwingkreiswechselrichtern
DE1765775A1 (de) Schweissgeraet mit statischem Speisekreis
DE2527275C3 (de) Stromsteuernde Transduktorschaltung zur Erzeugung eines konstanten Ausgangsgleichstromes
DE1563212C (de) Ein- oder mehrphasige Rundsteuersendeanlage für Tonfrequenz-Rundsteuerung
AT247977B (de) Anordnung zum Ausgleich von Spannungsschwankungen bei Röhrengeneratoren
DE1961581C3 (de) Hochspannungsgenerator zur Erzeugung gedämpfter periodischer Prüfspannungen (Schaltspannungen)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19840310

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE FR GB IT LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19860917

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19860917

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19860917

Ref country code: BE

Effective date: 19860917

REF Corresponds to:

Ref document number: 22382

Country of ref document: AT

Date of ref document: 19861015

Kind code of ref document: T

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19860930

EN Fr: translation not filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19870701

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19870731

26N No opposition filed
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19881122