EP1523748A1 - Inductive component and use of said component - Google Patents
Inductive component and use of said componentInfo
- Publication number
- EP1523748A1 EP1523748A1 EP03787700A EP03787700A EP1523748A1 EP 1523748 A1 EP1523748 A1 EP 1523748A1 EP 03787700 A EP03787700 A EP 03787700A EP 03787700 A EP03787700 A EP 03787700A EP 1523748 A1 EP1523748 A1 EP 1523748A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wire winding
- core
- component according
- component
- gap
- 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
- 230000001939 inductive effect Effects 0.000 title claims abstract description 51
- 238000004804 winding Methods 0.000 claims abstract description 89
- 239000011162 core material Substances 0.000 claims abstract description 70
- 239000002131 composite material Substances 0.000 claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 230000005291 magnetic effect Effects 0.000 claims abstract description 18
- 239000000945 filler Substances 0.000 claims abstract description 12
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims description 12
- 239000002861 polymer material Substances 0.000 claims description 12
- 239000004020 conductor Substances 0.000 claims description 9
- 238000004382 potting Methods 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 6
- 239000011231 conductive filler Substances 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000005286 illumination Methods 0.000 abstract 1
- WWTBZEKOSBFBEM-SPWPXUSOSA-N (2s)-2-[[2-benzyl-3-[hydroxy-[(1r)-2-phenyl-1-(phenylmethoxycarbonylamino)ethyl]phosphoryl]propanoyl]amino]-3-(1h-indol-3-yl)propanoic acid Chemical compound N([C@@H](CC=1C2=CC=CC=C2NC=1)C(=O)O)C(=O)C(CP(O)(=O)[C@H](CC=1C=CC=CC=1)NC(=O)OCC=1C=CC=CC=1)CC1=CC=CC=C1 WWTBZEKOSBFBEM-SPWPXUSOSA-N 0.000 description 5
- 229940126208 compound 22 Drugs 0.000 description 5
- 239000011888 foil Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000003302 ferromagnetic material Substances 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 229920001940 conductive polymer Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005292 diamagnetic effect Effects 0.000 description 1
- 239000002889 diamagnetic material Substances 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000002565 electrocardiography Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002907 paramagnetic material Substances 0.000 description 1
- 238000009774 resonance method Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/043—Fixed inductances of the signal type with magnetic core with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/022—Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/327—Encapsulating or impregnating
Definitions
- the invention relates to an inductive component for forming a magnetic circuit, comprising at least one wire winding and at least one core. a ferromagnetic core material, the core having a gap and at least one further gap to interrupt the magnetic circuit.
- a use of the component is specified.
- ECGs have at least one inductive component.
- the inductive component is, for example, a choke coil or a transformer.
- the inductive component has a wire winding.
- the wire winding has a number of turns of an electrical conductor for generating a magnetic flux through the current flowing in the conductor.
- the wire winding also serves to generate a voltage by changing the magnetic induction in the wire winding. To increase the magnetic induction and to reduce a magnetic leakage loss is the
- Wire winding mostly on a core with ferromagnetic material is, for example, a ferrite.
- the core ensures that the magnetic circuit is as closed as possible.
- the object of the present invention is to provide an inductive component which has a high quality even with a high AC voltage present.
- an inductive component for forming a magnetic circuit, having at least one wire winding and at least one core with a ferromagnetic core material, the core having a gap and at least one further gap to interrupt the magnetic circuit.
- the inductive component is characterized in that the gaps each have a gap width that is at least 1.0 mm.
- the result is a relatively wide total gap, which is divided into at least two columns.
- the gap width of the column is selected from the range from 1.2 mm to 10 mm inclusive.
- the gap width is preferably 2 mm to 10 mm.
- a gap is a desired break in the magnetic circuit.
- the gap width is preferably approximately the same over an entire extension of the gap. The extent is, for example, a width, a length or a radius of the gap.
- the gap has at least partially a non-ferromagnetic material to interrupt the magnetic circuit.
- the non-ferromagnetic material is, for example, a diamagnetic or paramagnetic material.
- the magnetic circuit is interrupted at at least two points.
- the gap is interrupted by the column.
- the gap widths cause the magnetic circuit to be interrupted for a length of at least 2 x 0.5 mm.
- the core consists of at least two parts which are arranged opposite one another at the gaps and are spaced apart by the gap widths.
- At least one of the gaps is preferably an air gap.
- the non-ferromagnetic material of the gap is air.
- Another non-ferromagnetic, gaseous material can also be arranged in the air gap.
- a non-ferromagnetic solid or liquid material is also conceivable.
- This material is, for example, a polymer material.
- the gaps have an essentially identical gap width.
- the core consists of two parts that are separated by two columns. The two parts are arranged at the same distance from each other by equally wide gaps. Essentially the same means that even small deviations of up to 10% of the gap width are permissible.
- the wire winding has an inner region and an outer region and the gaps of the core are arranged in the inner region and / or in the outer region of the wire winding. For example, one gap is arranged in the interior and two gaps in the exterior.
- the gaps in the outer region are preferably distinguished by the essentially the same gap width. It can also be the case that the gap in the inner region of the wire winding has a significantly larger gap width than the two gaps in the outer region. However, the gap widths of all gaps are preferably essentially the same.
- the core can be asymmetrical. This means that it cannot be transformed into itself using a symmetry operation.
- the core is essentially symmetrical. Essentially means that there may be deviations in terms of exact symmetry. In addition, it essentially means that symmetry affects those components of the core that are primarily responsible for the function and properties of the core.
- the symmetrical core merges into itself by reflection at a point (center of symmetry), a straight line (axis of symmetry) or a plane (plane of symmetry).
- the symmetry elements mentioned are arranged in the interior of the wire winding.
- the symmetry element is, for example, a plane of symmetry which is arranged perpendicular to a winding axis of the wire winding.
- the winding axis of the wire winding is given by a direction in which the wire is wound.
- the core consists, for example, of two parts, which are each converted into one another by the reflection at the plane of symmetry.
- the plane of symmetry preferably also contains the gaps and the core consists of parts which are formed in mirror image to one another.
- the core has an RM6 or comparable core shape.
- These core shapes are a combination of an E core shape with a pot core shape.
- the entire component consisting of wire winding and core has an essentially symmetrical structure. This means that not only the core, but also the wire winding are essentially symmetrical.
- the wire winding and core can be converted into themselves by mirroring on a common mirror plane.
- symmetrical means that deviations from the symmetry are also conceivable. These deviations relate, for example, to a number or a shape of the turns of the wire winding, a shape of the core and an arrangement of the wire winding and core to one another.
- the core material of the core is suitable for high frequencies.
- the core material is preferably a ferrite in the form of an M33 core material with a cut-off frequency of approximately 10 MHz.
- This core material contains manganese and zinc.
- a Kl, K6 or K12 core material is also conceivable. These core materials have nickel and
- the K6 core material has a cutoff frequency of 7 MHz, for example.
- the wire winding has a high-frequency stranded wire with a large number of individual wires which are electrically insulated from one another.
- a strand is a wire that is wound or braided from many metal threads (single wires).
- the individual wires are insulated from one another in order to reduce losses due to the skin effect and eddy currents. This will in
- the individual wires have at least one selected from the range from 10 ⁇ m up to and including 50 ⁇ m
- the variety is in the range of 5 to 100 inclusive selected.
- the plurality is selected from the range of 10 to 30 inclusive.
- 10 or more individual wires are arranged to form a high-frequency strand. This makes it possible to provide wire windings with a relatively large surface area and thus with a relatively low high-frequency loss resistance.
- the inductive component is a choke coil or a transformer.
- a choke coil is permeable to direct current. In contrast, alternating current is limited by the choke coil.
- the choke coil has a high electrical reactance for a current of high frequency.
- the transformer consists of at least two wire windings. However, more than two wire windings can also be used
- the transformer consists of a wire winding, which is divided into two parts by an electrical tap.
- the inductive component is also cooled.
- there is at least one cooling device for cooling the wire winding which has at least one composite material with at least one polymer material and at least one thermally conductive filler.
- the composite material preferably consists of an electrically insulating or electrically poorly conductive polymer material with a thermally conductive and electrically poorly conductive filler.
- the polymer material can have a natural and / or artificial polymer.
- the natural polymer is, for example, rubber.
- the artificial polymer is a plastic.
- the polymer material forms a matrix in which the filler is embedded.
- the filler can be powdery or fibrous.
- a diameter of a filler particle is selected from the ⁇ m range, which ranges from 100 nm to 100 ⁇ m.
- Polymer material is preferably chosen so that a coagulation limit is exceeded. Below the coagulation limit, the likelihood of individual filler particles touching is very low. This leads to a relatively low specific
- the filler is thermally conductive and preferably also electrically insulating or electrically poorly conductive. This means that the inductive component can also be operated with a relatively high operating voltage.
- the operating voltage is up to 2000 V.
- the composite material is resistant to breakdown even with an operating voltage of this magnitude.
- a ceramic material is particularly suitable as a thermally conductive and at the same time electrically insulating or electrically poorly conductive filler.
- a ceramic Material with the properties mentioned is, for example, aluminum oxide (Al 2 O 3 ).
- the composite material of the cooling device is preferably connected directly to the wire winding in order to efficiently remove heat that is generated in the wire winding during operation of the inductive component. Heat is transported away from the wire winding by heat conduction.
- the cooling device has at least one film with the composite material which is in direct, thermally conductive contact with the wire winding.
- the film and the wire winding are connected in such a way that heat conduction from the wire winding to the film can take place.
- the foil and the wire winding touch each other.
- a film thickness (film thickness) of the film is, for example, 0.22 mm.
- the dielectric strength can be 1 kV to 6 kV despite the relatively small film thickness.
- a soft film with the composite material is used.
- the film is plastically and / or elastically deformable.
- the wire winding can be approximately embedded in the film. A thermal contact surface between the film and the wire winding, via which the heat conduction takes place, is particularly large.
- the cooling device has at least one casting compound which has at least one further composite material with at least one further polymer material and at least one further thermally conductive filler and which is in direct, thermally conductive contact with the wire winding and / or the film stands.
- the composite material and the further composite material can be the same or different. The same applies to individual components of the composite material and the other composite material.
- the wire winding and / or the film are partly or completely in the sealing compound with the other
- an intermediate space present between the film and the wire winding and / or between the encapsulation and the wire winding has a thermally conductive material for thermally bridging the intermediate space.
- the intermediate space is preferably completely filled with the thermally conductive material. This leads to improved heat dissipation away from the wire winding.
- a thermally conductive material is preferably used for this purpose, which is additionally electrically insulating.
- the thermally conductive material is therefore selected in particular from the group of oil, paste, wax and / or adhesive.
- the cooling device of the inductive component is designed such that the heat generated in the wire winding during operation of the inductive component can be efficiently dissipated to the outside.
- the heat is transported away from the composite material of the cooling device.
- the heat is transported further, for example, by convection.
- a fluid that can absorb the heat is conducted past the cooling device with the composite material.
- the fluid is, for example, a liquid or a gas or gas mixture.
- the heat is preferably carried on
- the film with the composite material and / or the sealing compound with the composite material is therefore thermally conductively connected to a heat sink in the inductive component by heat conduction.
- the heat sink ensures that the smallest possible temperature difference between the wire winding, the cooling device and the heat sink is present during operation of the inductive component.
- the heat sink is preferably designed such that it can absorb a large amount of heat.
- the heat capacity of the heat sink is large. It is also conceivable that the heat sink ensures efficient removal of the heat.
- the heat sink is, for example, a heat sink made of a material that is characterized by a high thermal conductivity.
- Thermal gradients can be used to cool the heat sink by convection.
- the inductive component is used in an electronic ballast in which an electrical input power is converted into an electrical output power.
- Input power and Output powers are usually different.
- the component is operated with an alternating voltage with a frequency in the range from 100 kHz up to and including 200 MHz. This frequency range is called the high frequency range.
- an AC voltage of up to 2000 volts is used. It has been shown that the gap can be used to achieve high quality even at a few hundred volts with a frequency of a few MHz. This means that the inductive component can be miniaturized and still a high power throughput can be achieved with high quality and low internal losses.
- the inductive component can thus be referred to as a miniaturized HF-HV (high-frequency high-voltage) component.
- the inductive component can also be used in an ignition transformer to ignite a discharge lamp.
- the discharge lamp is controlled by an electrical circuit with a high alternating voltage (initial voltage).
- a voltage pulse with an AC voltage of up to 40 kV is therefore used.
- the component is briefly driven with this high AC voltage within a few ⁇ m (ignition duration).
- Figure 1 shows an inductive component from the side.
- FIG. 2 shows a quality voltage diagram of the inductive component.
- FIGS. 3a and 3b show an RM design of the core of the inductive component from above and in cross section along the connecting line II.
- FIGS. 4 to 6 show the inductive component from FIG. 1, each with a cooling device in a lateral cross section.
- FIG. 7 shows a section of the inductive component with the cooling device in a lateral cross section.
- the inductive component 1 is an HF-HV (high-frequency high-voltage) transformer (FIG. 1).
- the component 1 has a wire winding 3 and a core 4.
- the wire winding is characterized by a winding axis 12, along which the wire of the wire winding 3 is wound.
- the wire winding 3 is a high-frequency strand 14 with 30 individual wires.
- the wire diameter of a single wire is about 30 ⁇ m.
- the core 4 is a ferrite core and consists of an M33 core material.
- the core has an RM6 core shape (FIGS. 3a and 3b).
- the core is a combination of an E core shape and a pot core shape with a central bore 15.
- the core 4 has a core-center gap 7, which is arranged around the central bore 15 in the inner region 10 of the wire winding 3.
- Two further gaps 8 are arranged in the outer region 11 of the wire winding 3 in one of the core legs 6 of the core 4. All three columns 7 and 8 are air gaps.
- the gap widths of columns 7 and 8 are essentially the same, each about 3 mm.
- the core is essentially symmetrical. It consists of two parts 5 arranged mirror-symmetrically to the mirror plane 13, which are arranged opposite one another at the columns 7 and 8 and are spaced apart from one another by the gap widths 9.
- the mirror plane 13 is in the three columns 7 and 8.
- the arrangement is not only the core 4, but also the wire winding 3 arranged essentially symmetrically. The result is an inductive component which is essentially symmetrical to the mirror plane 13.
- the quality-voltage diagram shown in FIG. 2 is measured with a primary inductance of the HF-HV transformer 1 of 24 ⁇ H and a frequency of 2.7 MHz using the circular resonance method. It can be clearly seen that even with an effective AC voltage (U L [V ef f]) of several hundred volts, a relatively high quality of the component can be achieved. Despite the high frequency, the high quality can be achieved with a small size, as is the case with an RM6 core shape.
- the wire winding 3 of the miniaturized HF-HV transformer is cooled in accordance with further embodiments.
- a cooling device 20 for cooling the wire winding 3 is provided.
- the cooling device 20 has a film 21 with a thermally conductive composite material.
- the base material of the composite material is a thermally and electrically poorly conductive polymer material.
- the polymer material there is a filler with high thermal and low electrical
- the film 21 has a film thickness of approximately 0.22 mm.
- the specific thermal conductivity coefficient ⁇ is about 4 K / Wm.
- the electrical dielectric strength extends up to about 6 kV.
- the high-frequency strand 14 of the wire winding 3 and the film 21 are wound around a winding body 30 adapted to the RM6 core shape.
- the film 21 and the wire winding 3 are arranged in such a way around the winding body 30 that the high-frequency wire 14 he wire winding 3 and the films 21 alternate in the radial direction starting from the winding body 30 (FIGS. 4 and 5).
- the high-frequency stranded wire 14 of the wire winding 3 and a plurality of foils 21 are each individually radially aligned with the winding body 30.
- a multi-chamber solution is implemented, which is also referred to as a disk winding. An efficient dissipation of the heat via the heat conduction path 24 is also ensured here.
- the inductive component 1 or the cooling device 20 of the inductive component 1 is embedded in a casting compound 22 with a further thermally conductive composite material (FIGS. 4 and 6).
- the potting compound 22 is in direct thermal contact with part of the wire winding 3. This means that the heat can be dissipated via heat conduction via a thermal contact surface between the high-frequency license 14 of the wire winding 3 and the film 21 or the films 21.
- the casting compound 22 is connected to the heat sink 25 in a thermally conductive manner via heat conduction.
- the heat sink 25 is a circuit board with a thermally highly conductive material. The result of the operation of the inductive component is a relatively small temperature difference between the wire winding 3 and the heat sink 25.
- Discharge fin 26 which is connected to the foils 21 via a spacer ceramic 28 with a relatively high thermal conductivity coefficient, the heat is passed on from the foils 21 or the wire winding 3 in the direction of the heat sink 25.
- these intermediate spaces 27 are filled with a thermally conductive and electrically insulating or poorly conductive paste.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Of Transformers For General Uses (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10232952 | 2002-07-19 | ||
DE10232952 | 2002-07-19 | ||
PCT/DE2003/002447 WO2004017338A1 (en) | 2002-07-19 | 2003-07-21 | Inductive component and use of said component |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1523748A1 true EP1523748A1 (en) | 2005-04-20 |
EP1523748B1 EP1523748B1 (en) | 2008-04-23 |
Family
ID=31724044
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03787700A Expired - Lifetime EP1523748B1 (en) | 2002-07-19 | 2003-07-21 | Inductive component and use of said component |
Country Status (7)
Country | Link |
---|---|
US (1) | US7508290B2 (en) |
EP (1) | EP1523748B1 (en) |
JP (1) | JP2005537636A (en) |
CN (1) | CN100538924C (en) |
AU (1) | AU2003250792B2 (en) |
DE (1) | DE50309696D1 (en) |
WO (1) | WO2004017338A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10332842A1 (en) * | 2003-07-18 | 2005-02-10 | Siemens Ag | Inductive component with cooling device and use of the device |
CN101990690B (en) * | 2008-04-10 | 2013-10-09 | Nxp股份有限公司 | 8-shaped inductor |
JP4661966B2 (en) * | 2009-03-06 | 2011-03-30 | 株式会社デンソー | Power converter |
US8427269B1 (en) | 2009-06-29 | 2013-04-23 | VI Chip, Inc. | Encapsulation method and apparatus for electronic modules |
US8427267B1 (en) * | 2009-06-29 | 2013-04-23 | VI Chip, Inc. | Encapsulation method and apparatus for electronic modules |
US8102236B1 (en) | 2010-12-14 | 2012-01-24 | International Business Machines Corporation | Thin film inductor with integrated gaps |
CN103167657B (en) * | 2011-12-09 | 2016-03-30 | 特电株式会社 | Cyclic metal piece induction heating equipment and cup-shaped metalwork induction heating equipment |
FR2996047B1 (en) * | 2012-09-27 | 2014-09-05 | Renault Sa | INDUCTIVE DEVICE LIMITING ACOUSTIC OSCILLATIONS |
CN103794332A (en) * | 2012-10-29 | 2014-05-14 | 江苏正强电气有限公司 | High-frequency filter inductor for auxiliary power converter system of electric locomotive |
DE102013208653A1 (en) * | 2013-05-10 | 2014-11-13 | Sts Spezial-Transformatoren-Stockach Gmbh & Co. Kg | Inductive component |
WO2018232291A1 (en) * | 2017-06-15 | 2018-12-20 | Radyne Corporation | Use of thermally conductive powders as heat transfer materials for electrical components |
DE102017222243A1 (en) * | 2017-12-08 | 2019-06-13 | Zf Friedrichshafen Ag | Throttle with cooling device |
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JPS61167352A (en) * | 1985-01-21 | 1986-07-29 | Toshiba Corp | Manufacture of pole |
JPS61193411A (en) | 1985-02-21 | 1986-08-27 | Hitachi Ltd | Thin insulator and manufacture thereof and resin molded coil employing this thin insulator |
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DE3611069A1 (en) | 1986-04-03 | 1987-10-08 | Schwabe Gmbh | ADJUSTABLE THROTTLE, ESPECIALLY FOR GAS DISCHARGE LAMPS |
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DE3821284A1 (en) | 1988-06-24 | 1989-12-28 | Electronic Werke Deutschland | Transformer for a switched-mode power supply, or the line output stage in a television receiver |
JPH04504643A (en) * | 1989-12-12 | 1992-08-13 | ザ スペリオール エレクトリック カンパニー | electrical equipment |
EP0440865A1 (en) * | 1990-02-09 | 1991-08-14 | Asea Brown Boveri Ab | Electrical insulation |
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JPH08321425A (en) | 1995-05-24 | 1996-12-03 | Hitachi Metals Ltd | Active filter choke coil, active filter circuit and power supply device |
US6253247B1 (en) * | 1996-11-21 | 2001-06-26 | Ragula Systems | System and method for transmitting a user's data packets concurrently over different telephone lines between two computer networks |
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DE19751548C2 (en) | 1997-11-20 | 2001-03-15 | Vogt Electronic Ag | Ignition transformer for a discharge lamp |
DE19854902A1 (en) * | 1998-11-27 | 2000-02-17 | Siemens Ag | Transformer, especially cast resin transformer; has 30- 70% of metal sheets forming air gap through division of their cross-section in side part of core |
JP2000356919A (en) | 1999-04-15 | 2000-12-26 | Canon Inc | Image heating device and coil for heating image |
DE10042283A1 (en) * | 2000-08-29 | 2002-03-14 | Fachhochschule Konstanz Fachbe | Choke coil has coil element(s) associated with core element arms in region of gap between individual arms of opposing core elements; individual coil elements are connected together |
JP2002208527A (en) * | 2001-01-12 | 2002-07-26 | Toko Inc | Leakage flux type power conversion transformer |
-
2003
- 2003-07-21 US US10/521,742 patent/US7508290B2/en not_active Expired - Fee Related
- 2003-07-21 DE DE50309696T patent/DE50309696D1/en not_active Expired - Fee Related
- 2003-07-21 EP EP03787700A patent/EP1523748B1/en not_active Expired - Lifetime
- 2003-07-21 AU AU2003250792A patent/AU2003250792B2/en not_active Ceased
- 2003-07-21 WO PCT/DE2003/002447 patent/WO2004017338A1/en active IP Right Grant
- 2003-07-21 CN CNB038172615A patent/CN100538924C/en not_active Expired - Fee Related
- 2003-07-21 JP JP2004528405A patent/JP2005537636A/en active Pending
Non-Patent Citations (1)
Title |
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See references of WO2004017338A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU2003250792B2 (en) | 2007-02-15 |
DE50309696D1 (en) | 2008-06-05 |
JP2005537636A (en) | 2005-12-08 |
CN1669097A (en) | 2005-09-14 |
WO2004017338A1 (en) | 2004-02-26 |
EP1523748B1 (en) | 2008-04-23 |
US7508290B2 (en) | 2009-03-24 |
US20050206487A1 (en) | 2005-09-22 |
AU2003250792A1 (en) | 2004-03-03 |
CN100538924C (en) | 2009-09-09 |
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