EP0462011A1 - Induktionsheizspule - Google Patents
Induktionsheizspule Download PDFInfo
- Publication number
- EP0462011A1 EP0462011A1 EP91401572A EP91401572A EP0462011A1 EP 0462011 A1 EP0462011 A1 EP 0462011A1 EP 91401572 A EP91401572 A EP 91401572A EP 91401572 A EP91401572 A EP 91401572A EP 0462011 A1 EP0462011 A1 EP 0462011A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conductor
- tube
- strands
- coil
- transposition
- 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
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 25
- 230000006698 induction Effects 0.000 title description 3
- 239000004020 conductor Substances 0.000 claims abstract description 134
- 230000017105 transposition Effects 0.000 claims abstract description 58
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000004804 winding Methods 0.000 claims description 29
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 230000001939 inductive effect Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000012809 cooling fluid Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 230000005291 magnetic effect Effects 0.000 description 9
- 230000004907 flux Effects 0.000 description 5
- 230000005294 ferromagnetic effect Effects 0.000 description 4
- 229910000906 Bronze Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 241001080024 Telles Species 0.000 description 2
- YFXPPSKYMBTNAV-UHFFFAOYSA-N bensultap Chemical compound C=1C=CC=CC=1S(=O)(=O)SCC(N(C)C)CSS(=O)(=O)C1=CC=CC=C1 YFXPPSKYMBTNAV-UHFFFAOYSA-N 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241001644893 Entandrophragma utile Species 0.000 description 1
- 241000287107 Passer Species 0.000 description 1
- 238000012550 audit Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 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
- H05B6/36—Coil arrangements
- H05B6/42—Cooling of coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F2038/003—High frequency transformer for microwave oven
Definitions
- the present invention relates generally to electromagnetic induction heating. It applies in particular, although not exclusively, to the heating of the edges of flat metallurgical products having to undergo hot deformation. Such products are in particular steel products which must be heated or reheated before being flattened and / or expanded by passing between the rollers of a rolling mill.
- the presence of the capacitive assembly allows the coil to run through a current of much greater intensity than that of the current supplied by the electric generator. The latter then supplies only active power actually consumed by the device, "reactive power", for example 10 times greater, being supplied by the capacitive assembly.
- the product to be heated often runs at high speed and may have irregularities which make it necessary to plan a long passage interval.
- the temperature of this product is often such that a thermally insulating layer must be provided on either side of this passage interval to protect the coil and the adjoining electrotechnical structure.
- the air gap of the magnetic circuit must be large, which results in the presence of a large magnetic flux in the region of the coil. This leakage flow is partially useless for heating the product to be heated, but it induces currents in the conductors of the coil and therefore significant parasitic heating affecting these conductors.
- Patent document US-A-4 176 237 further describes an induction furnace for liquid metal.
- This oven is provided with an inductive heating coil comprising conductors connected in parallel between two electrical terminals of this coil, each said conductor comprising a cooling tube, the transport of current in this conductor being distributed between strands applied in thermal contact. against the walls of this tube, the length of this conductor comprising zones of strong deformation in which it undergoes particularly intense deformations carrying out transpositions of conductors and strands to limit the formation of stray current loops.
- the present invention aims in particular to allow a simple manufacturing of a heating coil which is compact and which limits the energy losses of an induction heating device.
- the transport of current in each conductor of the coil is distributed between strands which remain applied in thermal contact against a cooling tube of this conductor even in transposition or twisting zones where this conductor has undergone particularly intense deformations , this conductor having at least a twist of a half-turn between the electrical terminals of the coil.
- FIG. 1 represents a view of a device for heating strands including two coils according to the present invention.
- Figure 2 shows an electrical diagram of this device.
- FIG. 3 represents an overall view in elevation of a coil of FIG. 1.
- FIG. 4 represents a bottom view of the coil of FIG. 3.
- FIG. 5 represents a partially cut away perspective view of a lower part of this same coil.
- FIG. 6 represents a developed view of a bar of this same coil in this same lower part.
- Figure 7 shows a cross-sectional view of a conductor of this bar.
- a strand heating device is used in a steel installation upstream of a rolling mill.
- a flat product consisting of a thick steel sheet 1 circulates on transport rollers 2 in a direction perpendicular to the plane of the sheet and represented by the end of an arrow V.
- This magnetic circuit is articulated around an axis 9 to allow, using a device 10, to temporarily increase the opening of the air gap 3 when the sheet 1 has a protruding defect which could come into contact with and damage one end of the magnetic circuit.
- the coils 7 and 8 are connected in series with each other and in parallel with a capacitive assembly 11 between the terminals of a generator 12.
- the latter supplies an alternating voltage at a working frequency of 250 Hz.
- the resonant circuit formed by the coils 7 and 8 and the capacitive assembly 11 is tuned to this frequency.
- each tube T has a external surface of which at least part constitutes a thermal contact surface 28 extending over the length of this tube. It consists of a material having sufficient electrical resistivity, taking into account its transverse dimensions, to limit the currents induced in this material at the working frequency.
- a plurality of the current transport strands B1 ... B12 extend over the length of the tube T. They are made of an electrically conductive material having an electrical resistivity lower than that of the material of this tube. Each of them has transverse dimensions smaller than those of this tube and chosen, taking into account this lower resistivity, so as to limit the currents induced in this strand at the working frequency. In addition, it rotates at least half a turn around this tube between the two electrical terminals so as to transpose the strands within the conductor.
- Each of the strands such as B1 has a substantially flattened rectangular section and has two main faces 44, 46 which extend along a width of this strand which is parallel to the width of the tube T.
- This strand also has two lateral faces 48, 50 which extend along a thickness of this strand which is parallel to the thickness of this tube and which is smaller than the width of this strand.
- Some only of the strands constitute two so-called first layers of strands B1 to B3 and B7 to B9 which are applied respectively to the two main faces 28, 36 of the tube T.
- Others of these strands constitute two second layers of strands B4 to B6 and B10 to B12 superimposed on these first two layers so as to make an indirect thermal contact between these two main faces of the tube and these two second layers through these first two layers, respectively.
- Each of these first and second layers has the same number of strands between two and five inclusive. This number is preferably equal to three, in accordance with Figures 3 to 6.
- Each group of conductors constitutes a bar 52 in which several conductors C1 to C5 succeed one another in an axial direction parallel to said coil axis A.
- the coil 7 extends along said axial direction between two circular end zones each surrounding the coil axis A.
- One of these zones comprises said electrical terminals 25, 26 and constitutes a high zone ZA.
- the other constitutes a low zone ZB.
- Two directions of movement are possible in said axial direction: a descending direction going from this high zone towards this low zone and a rising direction opposite to this descending direction.
- the bar 52 starts from a first electrical terminal 20 by rotating in a direct direction 54 around the coil axis A and going down. It thus forms an external winding 56 having a first diameter.
- a first conductor C1 is placed in this winding at the bottom of this bar.
- a second conductor C2 is placed above this first conductor, and so on until a last conductor C5 placed at the top of this bar above a penultimate conductor C4.
- This bar rotates and descends within this winding until the first conductor C1 reaches said lower zone ZB of the coil.
- This first conductor then has a transposition deformation which is carried out in the transposition zone ZT1 of this conductor and which causes it to join an internal winding 58 formed by the same bar 52.
- This winding has a second diameter smaller than said first diameter and the bar 52 rises within it while rotating around the coil axis A in said direct direction.
- the second conductor C2 situated in the external winding reaches in turn the lower zone of the coil. It then has the same transposition deformation in a ZT2 transposition zone which is specific to it and which is angularly offset in said direct direction from the transposition zone of the first conductor. This deformation causes this second conductor to join the internal winding 58 while passing below the first conductor C1, and so on until the last conductor C5 reaches the low zone ZB of the coil.
- This last conductor then has the same transposition deformation in a transposition zone ZT5 offset angularly in the same direction from a transposition zone ZT4 of the penultimate conductor C4. This transposition deformation causes the C5 conductor to join the internal winding while passing below this penultimate conductor.
- first conductor C1 is placed in the internal winding 58 at the top of the bar 52, the second conductor C2 below this first conductor and so on until the last conductor C5 which is placed at the bottom of this closed off. The latter turns and rises within this winding up to the second electrical terminal 22 in the upper zone ZA of the coil.
- the number of conductors of a bar is five and the thicknesses of the tube and of the strands of each of these conductors are oriented in the axial direction.
- the twist zones ZV1 to ZV5 are placed next to the transposition zones ZT1 to ZT5 so as to form regular angular successions around the axis A.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Induction Heating (AREA)
- Resistance Heating (AREA)
- Windings For Motors And Generators (AREA)
- Heat Treatment Of Articles (AREA)
- Magnetic Treatment Devices (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9007507A FR2663490B1 (fr) | 1990-06-15 | 1990-06-15 | Bobine de chauffage inductif. |
FR9007507 | 1990-06-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0462011A1 true EP0462011A1 (de) | 1991-12-18 |
EP0462011B1 EP0462011B1 (de) | 1994-09-14 |
Family
ID=9397668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91401572A Expired - Lifetime EP0462011B1 (de) | 1990-06-15 | 1991-06-13 | Induktionsheizspule |
Country Status (12)
Country | Link |
---|---|
US (1) | US5208433A (de) |
EP (1) | EP0462011B1 (de) |
JP (1) | JP2934313B2 (de) |
KR (1) | KR100222214B1 (de) |
AT (1) | ATE111672T1 (de) |
AU (1) | AU638147B2 (de) |
CA (1) | CA2044656C (de) |
DE (1) | DE69103969T2 (de) |
ES (1) | ES2060323T3 (de) |
FR (1) | FR2663490B1 (de) |
WO (1) | WO1991020168A1 (de) |
ZA (1) | ZA914570B (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2693072A1 (fr) * | 1992-06-24 | 1993-12-31 | Celes | Perfectionnements apportés aux bobines de système de chauffage par induction. |
US10845438B2 (en) | 2018-02-12 | 2020-11-24 | Commissariat à l'énergie atomique et aux énergies alternatives | Vector magnetometer with elliptical polarisation |
Families Citing this family (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5239916A (en) * | 1993-02-26 | 1993-08-31 | Lungchiang Hu | Watercool electromagnetic induction heating wok |
CA2265297C (en) | 1998-03-31 | 2002-10-29 | Illinois Tool Works Inc. | Method and apparatus for welding |
US6229126B1 (en) | 1998-05-05 | 2001-05-08 | Illinois Tool Works Inc. | Induction heating system with a flexible coil |
KR100468410B1 (ko) * | 2002-08-09 | 2005-01-29 | 김학민 | 전자유도 가열장치 |
WO2004016048A1 (en) * | 2002-08-09 | 2004-02-19 | Hak-Min Kim | Electronic induction heater |
JPWO2005104622A1 (ja) * | 2004-04-23 | 2008-03-13 | 独立行政法人科学技術振興機構 | コイル装置及び磁界発生装置 |
US10040143B2 (en) | 2012-12-12 | 2018-08-07 | Illinois Tool Works Inc. | Dabbing pulsed welding system and method |
US10906114B2 (en) | 2012-12-21 | 2021-02-02 | Illinois Tool Works Inc. | System for arc welding with enhanced metal deposition |
US9950383B2 (en) | 2013-02-05 | 2018-04-24 | Illinois Tool Works Inc. | Welding wire preheating system and method |
US10835983B2 (en) | 2013-03-14 | 2020-11-17 | Illinois Tool Works Inc. | Electrode negative pulse welding system and method |
US11045891B2 (en) | 2013-06-13 | 2021-06-29 | Illinois Tool Works Inc. | Systems and methods for anomalous cathode event control |
US10828728B2 (en) | 2013-09-26 | 2020-11-10 | Illinois Tool Works Inc. | Hotwire deposition material processing system and method |
US11154946B2 (en) | 2014-06-30 | 2021-10-26 | Illinois Tool Works Inc. | Systems and methods for the control of welding parameters |
US11198189B2 (en) | 2014-09-17 | 2021-12-14 | Illinois Tool Works Inc. | Electrode negative pulse welding system and method |
US11478870B2 (en) | 2014-11-26 | 2022-10-25 | Illinois Tool Works Inc. | Dabbing pulsed welding system and method |
US10189106B2 (en) | 2014-12-11 | 2019-01-29 | Illinois Tool Works Inc. | Reduced energy welding system and method |
US11370050B2 (en) | 2015-03-31 | 2022-06-28 | Illinois Tool Works Inc. | Controlled short circuit welding system and method |
US11285559B2 (en) | 2015-11-30 | 2022-03-29 | Illinois Tool Works Inc. | Welding system and method for shielded welding wires |
US10610946B2 (en) | 2015-12-07 | 2020-04-07 | Illinois Tool Works, Inc. | Systems and methods for automated root pass welding |
US10675699B2 (en) | 2015-12-10 | 2020-06-09 | Illinois Tool Works Inc. | Systems, methods, and apparatus to preheat welding wire |
US10766092B2 (en) | 2017-04-18 | 2020-09-08 | Illinois Tool Works Inc. | Systems, methods, and apparatus to provide preheat voltage feedback loss protection |
US10870164B2 (en) | 2017-05-16 | 2020-12-22 | Illinois Tool Works Inc. | Systems, methods, and apparatus to preheat welding wire |
CN111372711A (zh) | 2017-06-09 | 2020-07-03 | 伊利诺斯工具制品有限公司 | 具有用于预热焊丝的第一接触焊嘴和第二接触焊嘴的焊接炬 |
US11590597B2 (en) | 2017-06-09 | 2023-02-28 | Illinois Tool Works Inc. | Systems, methods, and apparatus to preheat welding wire |
CA3066666A1 (en) | 2017-06-09 | 2018-12-13 | Illinois Tool Works Inc. | Contact tips with screw threads and head to enable unthreading of the screw threads comprising longitudinal slots for gas flow; welding torch with contact tips |
CN111315524A (zh) | 2017-06-09 | 2020-06-19 | 伊利诺斯工具制品有限公司 | 具有两个触头和用于将电流传导至触头的多个液冷组件的焊接炬 |
US11524354B2 (en) | 2017-06-09 | 2022-12-13 | Illinois Tool Works Inc. | Systems, methods, and apparatus to control weld current in a preheating system |
US11020813B2 (en) | 2017-09-13 | 2021-06-01 | Illinois Tool Works Inc. | Systems, methods, and apparatus to reduce cast in a welding wire |
EP3843933A1 (de) | 2018-08-31 | 2021-07-07 | Illinois Tool Works, Inc. | Unterwasser-lichtbogenschweisssysteme und unterwasser-lichtbogenschweissbrenner zur resistiven vorwärmung eines elektrodendrahtes |
US11014185B2 (en) | 2018-09-27 | 2021-05-25 | Illinois Tool Works Inc. | Systems, methods, and apparatus for control of wire preheating in welding-type systems |
EP3898055A2 (de) | 2018-12-19 | 2021-10-27 | Illinois Tool Works, Inc. | Kontaktspitze, drahtvorwärmanordnung, kontaktspitzenanordnung und mit einer abschmelzenden elektrode gespeistes schweisssystem |
US11772182B2 (en) | 2019-12-20 | 2023-10-03 | Illinois Tool Works Inc. | Systems and methods for gas control during welding wire pretreatments |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1150187A (fr) * | 1955-05-18 | 1958-01-08 | Asea Ab | Dispositif pour le refroidissement d'enroulements électriques |
FR1371223A (fr) * | 1963-05-21 | 1964-09-04 | Westinghouse Electric Corp | Enroulements pour appareil électrique à induction |
DE2347592A1 (de) * | 1972-10-05 | 1974-04-18 | Asea Ab | Fluessigkeitsgekuehlte transformatorwicklung |
US4176237A (en) * | 1977-02-01 | 1979-11-27 | Ateliers De Constructions Electriques De Charleroi (Acec) | Four a induction |
FR2555353A1 (fr) * | 1983-11-21 | 1985-05-24 | Cem Comp Electro Mec | Electro-aimant a courant variable, notamment pour chauffage inductif |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1986353A (en) * | 1931-09-21 | 1935-01-01 | Ajax Electrothermic Corp | Induction furnace method and apparatus |
US2249909A (en) * | 1939-05-10 | 1941-07-22 | Pisarev David | End heating device |
US4072873A (en) * | 1975-07-09 | 1978-02-07 | Westinghouse Electric Corp. | Biaxial compression phase lead connector |
US4277768A (en) * | 1978-11-24 | 1981-07-07 | General Dynamics Corporation | Superconducting magnetic coil |
FR2566986B1 (fr) * | 1984-06-28 | 1986-09-19 | Electricite De France | Dispositif a induction electromagnetique pour le chauffage d'elements metalliques |
SE460942B (sv) * | 1985-08-22 | 1989-12-04 | Tetra Pak Ab | Uppvaermningsanordning foer foerpackningsbehaallare innehaallande vaetskeformigt fyllgods |
CA1266094A (en) * | 1986-01-17 | 1990-02-20 | Patrick Earl Burke | Induction heating and melting systems having improved induction coils |
FR2630612B1 (fr) * | 1988-04-26 | 1996-05-24 | Siderurgie Fse Inst Rech | Dispositif de protection des poles d'inducteurs et inducteur pourvu de ce dispositif |
US4864266A (en) * | 1988-04-29 | 1989-09-05 | Electric Power Research Institute, Inc. | High-voltage winding for core-form power transformers |
US4859823A (en) * | 1988-09-16 | 1989-08-22 | Ajax Magnethermic Corporation | Electric induction heater |
-
1990
- 1990-06-15 FR FR9007507A patent/FR2663490B1/fr not_active Expired - Lifetime
-
1991
- 1991-06-13 ES ES91401572T patent/ES2060323T3/es not_active Expired - Lifetime
- 1991-06-13 JP JP3510739A patent/JP2934313B2/ja not_active Expired - Fee Related
- 1991-06-13 WO PCT/FR1991/000476 patent/WO1991020168A1/fr active Application Filing
- 1991-06-13 KR KR1019920700330A patent/KR100222214B1/ko not_active IP Right Cessation
- 1991-06-13 EP EP91401572A patent/EP0462011B1/de not_active Expired - Lifetime
- 1991-06-13 DE DE69103969T patent/DE69103969T2/de not_active Expired - Fee Related
- 1991-06-13 AU AU80831/91A patent/AU638147B2/en not_active Ceased
- 1991-06-13 AT AT91401572T patent/ATE111672T1/de not_active IP Right Cessation
- 1991-06-14 US US07/715,192 patent/US5208433A/en not_active Expired - Lifetime
- 1991-06-14 ZA ZA914570A patent/ZA914570B/xx unknown
- 1991-06-14 CA CA002044656A patent/CA2044656C/fr not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1150187A (fr) * | 1955-05-18 | 1958-01-08 | Asea Ab | Dispositif pour le refroidissement d'enroulements électriques |
FR1371223A (fr) * | 1963-05-21 | 1964-09-04 | Westinghouse Electric Corp | Enroulements pour appareil électrique à induction |
DE2347592A1 (de) * | 1972-10-05 | 1974-04-18 | Asea Ab | Fluessigkeitsgekuehlte transformatorwicklung |
US4176237A (en) * | 1977-02-01 | 1979-11-27 | Ateliers De Constructions Electriques De Charleroi (Acec) | Four a induction |
FR2555353A1 (fr) * | 1983-11-21 | 1985-05-24 | Cem Comp Electro Mec | Electro-aimant a courant variable, notamment pour chauffage inductif |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2693072A1 (fr) * | 1992-06-24 | 1993-12-31 | Celes | Perfectionnements apportés aux bobines de système de chauffage par induction. |
EP0577468A1 (de) * | 1992-06-24 | 1994-01-05 | Société CELES | Verbesserungen bei Spulen für Induktionsheizsysteme |
US5430274A (en) * | 1992-06-24 | 1995-07-04 | Celes | Improvements made to the cooling of coils of an induction heating system |
US10845438B2 (en) | 2018-02-12 | 2020-11-24 | Commissariat à l'énergie atomique et aux énergies alternatives | Vector magnetometer with elliptical polarisation |
Also Published As
Publication number | Publication date |
---|---|
FR2663490A1 (fr) | 1991-12-20 |
KR100222214B1 (ko) | 1999-10-01 |
ZA914570B (en) | 1992-03-25 |
KR927002594A (ko) | 1992-09-04 |
DE69103969T2 (de) | 1995-01-19 |
FR2663490B1 (fr) | 1992-09-11 |
AU638147B2 (en) | 1993-06-17 |
JPH05500729A (ja) | 1993-02-12 |
CA2044656A1 (fr) | 1991-12-16 |
AU8083191A (en) | 1992-01-07 |
DE69103969D1 (de) | 1994-10-20 |
WO1991020168A1 (fr) | 1991-12-26 |
CA2044656C (fr) | 2001-08-21 |
ATE111672T1 (de) | 1994-09-15 |
EP0462011B1 (de) | 1994-09-14 |
US5208433A (en) | 1993-05-04 |
JP2934313B2 (ja) | 1999-08-16 |
ES2060323T3 (es) | 1994-11-16 |
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