EP3329739A2 - Inductor and inductor system - Google Patents
Inductor and inductor systemInfo
- Publication number
- EP3329739A2 EP3329739A2 EP16753290.2A EP16753290A EP3329739A2 EP 3329739 A2 EP3329739 A2 EP 3329739A2 EP 16753290 A EP16753290 A EP 16753290A EP 3329739 A2 EP3329739 A2 EP 3329739A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- inductor
- inductors
- main winding
- winding part
- main
- 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
- 238000004804 winding Methods 0.000 claims abstract description 88
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 230000006698 induction Effects 0.000 claims abstract description 8
- 230000005284 excitation Effects 0.000 claims description 51
- 239000004020 conductor Substances 0.000 claims description 39
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 description 5
- 239000012212 insulator Substances 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 230000001939 inductive effect Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
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
-
- 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
- H05B6/367—Coil arrangements for melting furnaces
-
- 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
- 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
- H05B6/44—Coil arrangements having more than one coil or coil segment
Definitions
- the invention relates to an inductor for induction heating with a supply conductor and a return conductor and a Schowindungsteil having at least one main turn with a first direction of rotation.
- the invention relates to an inductor arrangement with at least two inductors for induction heating, each having a supply conductor and a return conductor and a main winding part, which has at least one main winding with a first direction of rotation.
- Inductors of this or similar type are known, for example, from: US3, 108,169, DE11 2011 102 681 T5, DE69 319 311 T4, US Pat.
- the invention relates to a method for inductive heating of several objects with several each to a separate
- Excitation unit connected inductors Inductors are used for a variety of industrial applications, such as melting, evaporating or operating an induction evaporator.
- the operation of adjacent inductors often leads to disturbances on the generators, ie the excitation units, since the inductors are magnetically coupled. This leads to a mutual influence of the connected generators, the performance of which can not be controlled arbitrarily.
- the object of the present invention is to provide an inductor and an inductor arrangement, so that the proper operation of two or more inductors, which are arranged at a small distance from one another, is made possible.
- the object is achieved by an inductor for induction heating with a supply conductor and a return conductor and a main winding part, the at least one
- Main turn having a first direction of rotation, wherein the main winding part at both ends of a Jacobwindungsabexcellent connected to the first direction of rotation opposite direction of rotation followed.
- Main winding member is directly connected to the Schmidtwindungsabitesen by a series connection.
- the main winding part has more turns than at least one opposite winding section. This will be the
- the main winding part is preferably for the inductive
- the main winding member is configured to have a sufficiently large inner diameter so that a body to be heated may be disposed therein.
- At least one counter-winding section may have one or more partial or complete turns.
- One or more partial turns have the advantage that ranges of action of
- the main winding part in particular the main winding part together with at least one opposite winding section, can be helical
- main winding part or main winding part and counter winding part may have a rectangular or square cross section.
- the Hauptwindungsteil and the Gegenwindungsabites may also be conical or elliptical or have a different shape.
- Main winding part and / or the Gegenwindungsabites be designed so that they are suitable for receiving a melt or
- At least one counter-winding section may have at least the same or a larger diameter than the main winding part.
- main winding part and the Gegenwindungsabitese should retain a substantially cylindrical shape.
- the main winding part may be provided with at least one
- Main turning portion flowing alternating current with the same phase also flows in the Schmidtwindungsabites, whereby the propagation of the magnetic field of the Hauptwindungsteilils in the outer space of the inductor is changed maximum.
- the main winding part may have more turns than at least one
- the inductor is particularly suitable to perform an inductive heating.
- the feeder and the return conductor can be parallel, in particular
- Return conductor may be arranged an insulator.
- an isolator other than air or vacuum is not mandatory.
- Supply line can be minimized.
- the stray field can be reduced.
- the voltage losses can be reduced. Furthermore, a limitation of the unwanted field of the leads can be done in the smallest possible space.
- flashovers can be avoided. In particular, by using an insulator, a defined distance between the feed conductor and the return conductor can be realized.
- the feeder and / or the return conductor can with a
- the inductor section may extend approximately at right angles to the supply conductor and / or the return conductor.
- the inductor section can be arranged outside the main winding part.
- the body to be heated can be disposed inside the main winding part without disturbing the inductor portion.
- the inductor may have a coating to prevent corrosion.
- the coating may be a
- the inductor may be formed of a tube. As a result, it is suitable for flowing through coolant, in particular cooling water. Joule losses can be dissipated in this case by the cooling water.
- the inductor may be formed of copper. The ohmic resistance of the inductor is thereby minimized. The Joule losses in the
- Cooling water of the inductor can be minimized.
- connection for connection to an excitation unit At the ends of the feeder and the return conductor can be provided in each case a connection for connection to an excitation unit.
- Coolant in particular cooling water
- the connections for connection to an excitation unit can also be designed as cooling fluid connections.
- an inductor arrangement with at least two inductors for induction heating, each with a supply conductor and a return conductor and a Schowindungsteil having at least one main turn with a first direction of rotation to which at least one end of a Jacobwindungsabexcellent opposite to the first direction of rotation Turning connects, with the
- Inductors are each connected to an excitation unit and their axes preferably have a mutual distance of less than 5 times the value of the diameter or the length of an inductor, whichever is greater. With the diameter is the
- Inductor is the axial length of the inductor including the counterwinding section and including the length of the inductor
- At least one of the inductors may be designed as an inductor according to the invention, i. have a Jacobwindungsabêt at both ends of the main winding part.
- the supply and return conductors of the at least two inductors can run parallel to one another. Thereby, the advantages can be achieved, which are also achieved when the supply and return of an inductor parallel to each other.
- connections of at least two inductors can be in one
- connection plane is an imaginary surface located at the beginning of the feed line or at the end of the return line of an inductor. The distance from the
- Terminal level to Hauptwindungsteil the inductor may be equal to or less than the length of the supply line or return line.
- the main winding parts of at least two inductors may be arranged at different distances from the connection plane.
- At least one excitation unit may have an outer circuit, which has at least one capacitor and is configured such that the capacitor together with the to the excitation unit
- Parallel resonant circuit allows the excitation unit to supply a smaller current than the inductor current.
- the excitation units associated with adjacent inductors may be configured such that the adjacent inductors operate at different frequencies.
- the frequency of one excitation unit can be about twice the frequency of the other
- Excitation unit in particular more than 2.5 times, or advantageously more than three times the frequency of the other
- the frequency may typically be in the range between 2 kHz and 50 kHz, in particular between 5 kHz and 25 kHz. Particularly preferably, the frequency can be at exactly 8.2 kHz or 22 kHz.
- the excitation unit at the resonant frequency only has to deliver the active power required for heating.
- the reactive power to build up the electromagnetic field is provided by the resonant circuit itself.
- crucibles may be arranged for melting and in particular for evaporating metal.
- the scope of the invention also includes a method for inductively heating a plurality of objects with a plurality of inductors each connected to a separate excitation unit, wherein the
- Inductors in each case a supply conductor and a return conductor and a
- Main turning part having at least one main turn with a first direction of rotation.
- a first excitation unit is operated at a frequency and a second excitation unit is operated at a second frequency deviating from the first frequency.
- the second frequency may be at least twice the first frequency.
- the first frequency in a range 2 to 15 kHz, preferably from 5 to 10 kHz, most preferably exactly at 8.2 kHz.
- the second frequency can be in the range 15 to 50 kHz,
- Two adjacent inductors can be operated at different frequencies. If the inductors are designed as inductors according to the invention, the inductors can be operated at different frequencies without significantly influencing each other.
- At least two inductors can be operated alternately at different frequencies.
- Inductors which are arranged at the same distance from the connection plane, can be operated at the same frequency.
- Inductors whose main winding parts are arranged at different distances from the connection plane, can be at different
- Fig. 1 shows an embodiment of an inductor in one
- FIG. 2 shows a plan view of the inductor according to FIG. 1;
- Fig. 3 is an inductor.
- the main winding part 2 has main windings 5 with a first direction of rotation.
- the main windings 5 of the main winding part 2 and the Schmidtwindungsabitese 3, 4 have the same diameter. However, it is also conceivable that the Jacobwindungsabitese 3, 4 a larger diameter than the main winding 5 of the main winding part 2. However, the main winding part 2 and the Jacobwindungsabitese 3, 4 have a substantially cylindrical shape.
- the inductor 1 has a length I, which is the
- Main winding part 2 and the Schmidtwindungsabroughe 3, 4 comprises.
- Embodiment an almost complete turn. However, it is also conceivable that the Jacobwindungsabitese 3, 4 have only a portion of a turn.
- the Schmidtwindungsabitese 3, 4 are in an electrical
- Main winding part 5 are connected by inductor sections 6, 7, which cause a deflection by 180 °.
- the Schmidtungsabites 4 is connected to a feeder 8 and the
- the feed conductor 8 and the return conductor 10 are connected to terminals 11, 12, which are used for connection to an excitation unit but also for connection to a coolant circuit substantially perpendicular to the extension direction of the return conductor 10 and outside of the main winding part.
- an insulator 14 may be arranged between the feeder 8 and the return conductor 10.
- the main winding part 2 together with the counter-winding sections 3, 4 is essentially cylindrical.
- the main winding part 2 has more turns than the opposite winding sections 3, 4.
- Both the inductor section 9 and the inductor section 15, via which the feeder 8 is connected to the counterwinding section 4, run parallel to the longitudinal axis of the main winding part 2.
- FIG. 3 shows an inductor arrangement 100 which is shown in FIG. 3
- Embodiment three inductors 1, la, lb has.
- the inductors 1, 1a, 1b are formed as shown in FIG. However, they could also be designed so that only one Jacobwindungsabêt is provided at one end of Hauptwindungsteils 5.
- the inductors 1, 1a, 1b may be formed differently, i. For example, it may be provided an inductor 1, the two
- Main windings has. Furthermore, an inductor may be provided which only at one end of the main winding part a
- Hassselsabites and it may for example be provided a third inductor having no Gegenwindungsabites.
- a third inductor having no Gegenwindungsabites may be provided.
- at least one of the inductors should have at least one counter-winding section in order to reduce the stray field and to be able to arrange the inductors 1 close to one another.
- the distance d between the longitudinal axes of the main windings 2 of two adjacent inductors 1 and la or la and lb is thereby preferably less than five times the diameter D of a
- Return conductors 8, 10 of the inductors 1, 1a, 1b run in parallel, i. not only the feeder 8 and return conductor 10 of an inductor 1 but also all feeders 8 and all return conductors 10 are parallel to each other.
- the inductors 1, 1a, 1b are each connected to an excitation unit 101, 102, 103. By the excitation units 101 to 103, the inductors 1, la, lb are also supplied with cooling liquid.
- Excitation units 101 to 103 operate independently of each other and can generate an alternating current with different excitation frequency.
- the excitation unit 101 can generate a first excitation frequency and the excitation unit 102 can generate a second excitation frequency.
- the second excitation frequency may be approximately twice the first excitation frequency.
- the excitation units 101 to 103 are all arranged in the same connection plane e.
- the main winding parts 2 of adjacent inductors 1 and 1 a and 1 a and 1 b are at different distances from each other
- Connection level e arranged. The farther away from each other
- main windings 2 of the inductors 1 and lb are arranged at the same distance from the connection plane e.
- the excitation unit 101 has an outer circle 104, which has a capacitor and is configured in such a way that the capacitor together with the one connected to the excitation unit 101
- Inductor 1 at least a part of a resonant circuit, in particular one Parallel resonant circuit, forms. All excitation units 101 to 103 may have such an outer circle.
- crucibles 110 to 112 are arranged within the inductors 1, 1a, 1b for melting metal.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Induction Heating (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015214666.9A DE102015214666A1 (en) | 2015-07-31 | 2015-07-31 | Inductor and inductor arrangement |
PCT/EP2016/068336 WO2017021373A2 (en) | 2015-07-31 | 2016-08-01 | Inductor and inductor system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3329739A2 true EP3329739A2 (en) | 2018-06-06 |
EP3329739B1 EP3329739B1 (en) | 2020-09-30 |
Family
ID=56694108
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16753290.2A Active EP3329739B1 (en) | 2015-07-31 | 2016-08-01 | Inductor and inductor arrangement |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3329739B1 (en) |
JP (1) | JP6655165B2 (en) |
CN (1) | CN107852783B (en) |
DE (1) | DE102015214666A1 (en) |
WO (1) | WO2017021373A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017005532A1 (en) * | 2017-06-10 | 2018-12-13 | copperING GmbH | Method and device for inductive heating of a stator or armature of an electric machine |
DE202018103385U1 (en) * | 2018-03-06 | 2019-03-07 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | induction heating |
DE102021113354A1 (en) | 2021-05-21 | 2022-11-24 | TRUMPF Hüttinger GmbH + Co. KG | Inductor assembly, induction heating assembly and method of induction heating |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL253526A (en) * | 1959-08-14 | |||
CH530147A (en) * | 1970-12-18 | 1972-10-31 | Wiener Schwachstromwerke Gmbh | Circuit arrangement for a switchable induction coil for crucible furnaces |
JPS55121297A (en) * | 1979-03-12 | 1980-09-18 | Matsushita Electric Ind Co Ltd | Induction heating cooking device |
GB2198020B (en) * | 1986-11-25 | 1990-10-10 | Ti Creda Ltd | Improvements in or relating to induction heating coils for cooking appliances |
US5304767A (en) * | 1992-11-13 | 1994-04-19 | Gas Research Institute | Low emission induction heating coil |
DE4403078A1 (en) * | 1993-06-01 | 1994-12-08 | Abb Patent Gmbh | Method for controlling at least two parallel resonant circuit inverters |
US6538239B1 (en) * | 1997-05-13 | 2003-03-25 | Walter James Anderson | Induction heating device for metal pieces |
JP4651238B2 (en) * | 2001-08-24 | 2011-03-16 | 株式会社ミヤデン | High frequency induction heating coil device |
JP3726235B2 (en) * | 2002-02-28 | 2005-12-14 | 三菱電機株式会社 | Induction heating cooker |
US20040084443A1 (en) * | 2002-11-01 | 2004-05-06 | Ulrich Mark A. | Method and apparatus for induction heating of a wound core |
CN2812481Y (en) * | 2005-04-01 | 2006-08-30 | 株洲弗拉德科技有限公司 | A novel medium-frequency induction heating coil |
KR101094919B1 (en) * | 2005-09-27 | 2011-12-16 | 삼성전자주식회사 | Plasma accelerator |
CN201111611Y (en) * | 2007-09-26 | 2008-09-10 | 孙青海 | High efficiency and energy saving electromagnetic range suitable for round bottom or pan |
CN201144277Y (en) * | 2007-12-29 | 2008-11-05 | 杭州晶鑫镀膜包装有限公司 | Vacuum aluminum film plating apparatus |
JP5332839B2 (en) * | 2009-04-08 | 2013-11-06 | パナソニック株式会社 | Induction heating cooker |
JP5287444B2 (en) * | 2009-04-08 | 2013-09-11 | パナソニック株式会社 | Induction heating cooker |
CN201436827U (en) * | 2009-06-27 | 2010-04-07 | 东莞市前锋电子有限公司 | Electromagnetic heating coil structure for improving heating area |
CN102484122B (en) * | 2009-09-07 | 2015-05-13 | 皇家飞利浦电子股份有限公司 | Electroluminescencedevice, lighting device and system |
JP5495960B2 (en) * | 2010-06-07 | 2014-05-21 | 三菱電機株式会社 | Induction heating cooker |
JP4676567B1 (en) * | 2010-07-20 | 2011-04-27 | 三井造船株式会社 | Semiconductor substrate heat treatment equipment |
JP5063755B2 (en) * | 2010-08-09 | 2012-10-31 | 三井造船株式会社 | Induction heating apparatus and induction heating method |
US9267203B2 (en) * | 2010-12-13 | 2016-02-23 | Posco | Continuous coating apparatus |
JP2011155022A (en) * | 2011-05-19 | 2011-08-11 | Hitachi Appliances Inc | Induction heating cooker |
JP5751712B2 (en) * | 2012-06-14 | 2015-07-22 | ハイデック株式会社 | Electromagnetic cooker, electromagnetic induction device and metal heating medium used therefor |
JP2015069879A (en) * | 2013-09-30 | 2015-04-13 | パナソニック株式会社 | Induction heating apparatus |
DE202015100080U1 (en) * | 2015-01-09 | 2015-02-11 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | induction heating |
JP6012780B2 (en) * | 2015-01-22 | 2016-10-25 | 三菱電機株式会社 | Cooker |
-
2015
- 2015-07-31 DE DE102015214666.9A patent/DE102015214666A1/en not_active Ceased
-
2016
- 2016-08-01 WO PCT/EP2016/068336 patent/WO2017021373A2/en active Application Filing
- 2016-08-01 EP EP16753290.2A patent/EP3329739B1/en active Active
- 2016-08-01 JP JP2018504852A patent/JP6655165B2/en active Active
- 2016-08-01 CN CN201680045101.8A patent/CN107852783B/en active Active
Also Published As
Publication number | Publication date |
---|---|
JP2018527703A (en) | 2018-09-20 |
EP3329739B1 (en) | 2020-09-30 |
WO2017021373A3 (en) | 2017-04-06 |
DE102015214666A1 (en) | 2017-02-02 |
CN107852783A (en) | 2018-03-27 |
CN107852783B (en) | 2021-06-01 |
WO2017021373A8 (en) | 2017-05-26 |
JP6655165B2 (en) | 2020-02-26 |
WO2017021373A2 (en) | 2017-02-09 |
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