EP0090676B1 - Procédé et dispositifs de réglage de la puissance moyenne de chauffage induite dans un produit plat conducteur maintenu électromagnétiquement en position sans contact - Google Patents
Procédé et dispositifs de réglage de la puissance moyenne de chauffage induite dans un produit plat conducteur maintenu électromagnétiquement en position sans contact Download PDFInfo
- Publication number
- EP0090676B1 EP0090676B1 EP83400258A EP83400258A EP0090676B1 EP 0090676 B1 EP0090676 B1 EP 0090676B1 EP 83400258 A EP83400258 A EP 83400258A EP 83400258 A EP83400258 A EP 83400258A EP 0090676 B1 EP0090676 B1 EP 0090676B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- poles
- induced
- product
- power
- inductors
- 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.)
- Expired
Links
- 238000010438 heat treatment Methods 0.000 title claims description 21
- 238000000034 method Methods 0.000 title claims description 13
- 230000001105 regulatory effect Effects 0.000 title 1
- 238000009434 installation Methods 0.000 claims description 5
- 230000005672 electromagnetic field Effects 0.000 claims description 3
- 230000005674 electromagnetic induction Effects 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 238000009827 uniform distribution Methods 0.000 claims description 2
- 238000005339 levitation Methods 0.000 description 11
- 230000004907 flux Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/101—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces
- H05B6/103—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor
- H05B6/104—Induction heating apparatus, other than furnaces, for specific applications for local heating of metal pieces multiple metal pieces successively being moved close to the inductor metal pieces being elongated like wires or bands
-
- 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 present invention relates to a method and to devices for implementing this method allowing the adjustment of the average heating power induced by an electromagnetic field in a flat conductive product when stopped or running, maintained without contact, by the electromagnetic forces also induced by this field, in particular in levitation or guidance, in an electromagnetic induction heating installation comprising a pair of substantially identical inductors whose poles face each other in pairs on either side of the product.
- the object of the invention is to regulate in the widest possible range the heating power induced in a flat conductive product maintained without contact, by the correspondingly induced electromagnetic forces, in particular in levitation or guidance, by ensuring the product a substantially constant position. and using simple and economical equipment.
- the method according to the invention consists, for adjusting the heating power induced by an electromagnetic field in a flat conductive product maintained without contact by the electromagnetic forces correlatively induced by this field, in an electromagnetic induction heating installation comprising a pair of substantially identical inductors, arranged on either side of the product, the poles of one of the inductors of the pair facing the poles of the other inductor, to operate a series of reversals of the instantaneous polarity of the poles of the one of the inductors with respect to the instantaneous polarity of the corresponding poles of the other inductor, the ratio of the durations during which the polarities are on the one hand opposite and on the other hand identical determining the average value of the induced heating power, the position of the product remaining almost unchanged.
- the electromagnetic forces exerted on the product and which maintain it without contact remain substantially the same, that the instantaneous polarities of the poles two by two face to face of the inductors are all identical or all opposite, all other things remaining equal, if although during a reversal of the relative polarity of the poles of one of the inductors with respect to the polarity of the corresponding poles of the other inductor, the position of the product remains almost unchanged.
- the invention applies in particular to heating installations in levitation or, for example, heating with guidance for which it is necessary to maintain restoring forces, of substantially constant intensity, towards an equilibrium position.
- the instantaneous polarity inversions of the poles of one of the inductors with respect to the instantaneous polarity of the corresponding poles of the other inductor are carried out by the polarity reverser which operates for example an inversion of the connection of one of the inductors to the alternative source of current or voltage (the voltage / current ratio is different depending on whether the polarities are identical or opposite).
- a device comprises in one embodiment, a duty cycle generator whose frequency is a function of the desired adjustment precision, this in order to allow rigorously following an imposed temperature curve as a function of time.
- the polarity reverser is of the static type, consisting of two rectifier bridges in anti-parallel mounting.
- the adjustment device further comprises interposed between the adjustment system (C) and the inverter (A), a duty cycle generator (B) whose frequency is a function of the desired adjustment precision.
- This arrangement makes it possible, in particular, to rigorously follow an imposed temperature curve as a function of time.
- the polarity reverser (A) consists of two rectifier bridges in anti-parallel mounting, but this choice is in no way limiting.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Induction Heating (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8204181A FR2523395A1 (fr) | 1982-03-12 | 1982-03-12 | Procede et dispositif de reglage de la puissance moyenne de chauffage induite dans un produit plat conducteur maintenu electromagnetiquement en position sans contact |
FR8204181 | 1982-03-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0090676A1 EP0090676A1 (fr) | 1983-10-05 |
EP0090676B1 true EP0090676B1 (fr) | 1987-04-22 |
Family
ID=9271917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83400258A Expired EP0090676B1 (fr) | 1982-03-12 | 1983-02-07 | Procédé et dispositifs de réglage de la puissance moyenne de chauffage induite dans un produit plat conducteur maintenu électromagnétiquement en position sans contact |
Country Status (5)
Country | Link |
---|---|
US (1) | US4531037A (zh) |
EP (1) | EP0090676B1 (zh) |
JP (1) | JPS58169789A (zh) |
DE (1) | DE3371157D1 (zh) |
FR (1) | FR2523395A1 (zh) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5483042A (en) * | 1990-06-04 | 1996-01-09 | Nordson Corporation | Magnetic separator |
US5529703A (en) * | 1990-06-04 | 1996-06-25 | Nordson Corporation | Induction dryer and magnetic separator |
US5847370A (en) * | 1990-06-04 | 1998-12-08 | Nordson Corporation | Can coating and curing system having focused induction heater using thin lamination cores |
ZA9210102B (en) * | 1992-02-10 | 1993-08-24 | Heron Tech Inc | Induction dryer and magnetic separator |
WO1993023970A1 (en) * | 1992-05-08 | 1993-11-25 | Heron Technologies, Inc. | Induction dryer and magnetic separator |
JPH08222619A (ja) * | 1995-02-14 | 1996-08-30 | Toshiba Corp | 半導体製造装置 |
BR112012020606B1 (pt) * | 2010-02-19 | 2021-02-23 | Nippon Steel Corporation | dispositivo de aquecimento por indução de fluxo transversal |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0087345A1 (fr) * | 1982-02-18 | 1983-08-31 | Alsthom | Procédé et dispositifs pour minimiser la puissance induite dans un produit plat conducteur maintenu électromagnétiquement sans contact |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE903847C (de) * | 1943-01-12 | 1954-02-11 | Deutsche Edelstahlwerke Ag | Vorrichtung zum einseitigen elektro-induktiven Erhitzen von Werkstuecken |
NL243545A (zh) * | 1958-09-19 | 1900-01-01 | ||
FR1389902A (fr) * | 1964-03-27 | 1965-02-19 | Procédé et dispositif pour le transport de feuillards, profilés, tubes et produits analogues en une matière conduisant le courant électrique, de préférence à travers un four de passage | |
US3398252A (en) * | 1965-11-15 | 1968-08-20 | Westinghouse Electric Corp | Heat treatment apparatus |
FR1576364A (zh) * | 1967-12-12 | 1969-08-01 | ||
GB1453489A (en) * | 1974-03-07 | 1976-10-20 | Electricity Council | Processing of billets slabs strips and other metal workpieces |
US4321444A (en) * | 1975-03-04 | 1982-03-23 | Davies Evan J | Induction heating apparatus |
GB1546367A (en) * | 1975-03-10 | 1979-05-23 | Electricity Council | Induction heating of strip and other elongate metal workpieces |
DE2556057C2 (de) * | 1975-12-12 | 1982-04-01 | Sundwiger Eisenhütte Maschinenfabrik Grah & Co, 5870 Hemer | Verfahren und Vorrichtung zum Erwärmen von Metallbändern, insbesondere Nichteisen-Metallbändern |
DE2622825A1 (de) * | 1976-05-21 | 1977-12-01 | Siemens Ag | Schaltungsanordnung zur regelung der heizleistung einer kontinuierlich arbeitenden erwaermungsanlage |
US4122321A (en) * | 1977-02-16 | 1978-10-24 | Park-Ohio Industries, Inc. | Induction heating furnace |
US4296298A (en) * | 1978-06-12 | 1981-10-20 | Raytheon Company | Dielectric cooking apparatus |
-
1982
- 1982-03-12 FR FR8204181A patent/FR2523395A1/fr active Granted
-
1983
- 1983-02-07 DE DE8383400258T patent/DE3371157D1/de not_active Expired
- 1983-02-07 EP EP83400258A patent/EP0090676B1/fr not_active Expired
- 1983-02-08 US US06/464,948 patent/US4531037A/en not_active Expired - Lifetime
- 1983-03-10 JP JP58038404A patent/JPS58169789A/ja active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0087345A1 (fr) * | 1982-02-18 | 1983-08-31 | Alsthom | Procédé et dispositifs pour minimiser la puissance induite dans un produit plat conducteur maintenu électromagnétiquement sans contact |
Also Published As
Publication number | Publication date |
---|---|
JPS58169789A (ja) | 1983-10-06 |
DE3371157D1 (en) | 1987-05-27 |
FR2523395A1 (fr) | 1983-09-16 |
US4531037A (en) | 1985-07-23 |
FR2523395B1 (zh) | 1984-06-01 |
EP0090676A1 (fr) | 1983-10-05 |
JPH0221116B2 (zh) | 1990-05-11 |
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