CN1839450B - Inductive component with a cooling device and use of said component - Google Patents
Inductive component with a cooling device and use of said component Download PDFInfo
- Publication number
- CN1839450B CN1839450B CN2004800206225A CN200480020622A CN1839450B CN 1839450 B CN1839450 B CN 1839450B CN 2004800206225 A CN2004800206225 A CN 2004800206225A CN 200480020622 A CN200480020622 A CN 200480020622A CN 1839450 B CN1839450 B CN 1839450B
- Authority
- CN
- China
- Prior art keywords
- wire winding
- cooling device
- heat conduction
- film
- heat
- 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 - Fee Related
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Classifications
-
- 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
- H01F27/323—Insulation between winding turns, between winding layers
-
- 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
-
- 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
Abstract
The invention relates to an inductive component (1), for the formation of a magnetic circuit, with at least one wire winding (3) and at least one cooling device (20), for cooling the wire winding. The inductive component is characterised in that the cooling device comprises at least one composite material with at least one polymer material and at least one thermally-conducting filler. Heat generated in the wire winding during operation of the inductive component can be efficiently removed by means of the cooling device. For high frequency applications, a wire winding made with a high frequency litz wire and a core made from a high-frequency core material are particularly used. A miniaturised inductive component is thus possible which has a high Q value, even with a high power throughput and thus has low electrical losses. The inductive component is of application in so-called electronic ballast devices in lighting equipment.
Description
Technical field
The present invention relates to a kind of inductance element that is used to form a magnetic loop, this inductance element has at least one wire winding and at least one is used to cool off the cooling device of this wire winding.
Background technology
An electric ballast (EVG) uses as electronic transformer and/or converter in lighting field.Electric ballast has at least one inductance element.This inductance element for example is a choking-winding or a transformer.This inductance element has a wire winding.This wire winding has many pitch of the laps of an electric conductor, is used for producing a magnetic flux by the electric current that flows at conductor.This wire winding also is used for producing a voltage by the variation of winding magnetic induction.In order to strengthen magnetic induction and in order to reduce leakage field loss, described wire winding is positioned on the core body that contains ferromagnetic material mostly.Described ferromagnetic material for example is a kind of ferrite.This core body is responsible for producing an enclosed magnetic loop as far as possible.
These electric ballasts are more and more microminiaturized.Described microminiaturization relates in particular to an inductance element of electric ballast.Under an identical power flow (Leistungsdurchsatz) condition, can connect the minor structure size that frequency realizes an inductance element by improving.Cause electric loss to increase but improve the connection frequency, and reduce the quality Q of inductance element thus.Described quality is the sign of an electricity quality of inductance element.Because quality reduces, when inductance element is more and more microminiaturized, especially cause a unallowed high operating temperature during with a kind of high alternating voltage operation at inductance element.
For the inductance element of a big transformer form, for example a cooling device that is used to cool off described wire winding utilizes a cooling circuit that moves by means of a kind of fluid to realize.Such solution is unaccommodated for a microminiaturized inductance element.Microminiaturized inductance element generally moves under air ambient.This means that the winding of this element only cools off by the convection current that surrounding air causes.But this methods for cooling may deficiency meet the demands the quality of inductance element so that operating temperature is reduced to.
Summary of the invention
The objective of the invention is, an inductance element is provided, it has an effective cooling device that is used to cool off winding.
This purpose is achieved by an inductance element that is used to form a magnetic loop, and this inductance element has at least one wire winding and at least one is used to cool off the cooling device of this wire winding.The feature of this inductance element is that described cooling device has at least a composite material that contains the filler of at least a polymeric material and at least a heat conduction.
Described composite material preferably is made up of polymeric material a kind of electric insulation or poor conductive, and this polymeric material has filler a kind of heat conduction and poor conductive.Described polymeric material can have a kind of natural and/or artificial polymer.This natural polymer for example is a rubber.The man-made polymer for example is a kind of plastics.
Described polymeric material constitutes a kind of matrix at this base material as composite material, adds filler therein.Can there be multiple filler at this.Described filler can be a powdery or fibrous.A kind of diameter of filler particles can be selected in the mu m range of 100nm to 100 μ m.Preferably select the filling rate of filler in polymeric material like this at this, make to surpass a coagulation threshold.Below the coagulation threshold, the possibility of each filler particles contact is very low at this.This will cause relatively low unit conductive coefficient.If surpass coagulation threshold, filler particles just contacts with relatively large possibility so.Obtain higher relatively composite material unit's conductive coefficient thus.
Described filler is heat conduction, and preferably also be electric insulation or poor conductive.This will make this inductance element also can move with a higher relatively operating voltage.For example described operating voltage can be up to 2000V.Even described composite material also is anti-puncture under the operating voltage of this order of magnitude.A kind of ceramic material be particularly suitable for as can heat conduction, electric insulation or poor conductive filler simultaneously.Aluminium oxide (Al for example
2O
3) be a kind of ceramic material with above-mentioned characteristic.
In order to discharge the heat that produces effectively in described wire winding when inductance element moves, the composite material of described cooling device preferably directly is connected with the wire winding.By the heat in the discharge wire winding that conducts heat.
In a special embodiment, described cooling device has at least one film that contains composite material, and this film is in direct heat conduction with described wire winding and contacts.This film is connected like this with the wire winding, makes to produce a kind of heat transfer from winding towards film.Described film and wire winding are in contact with one another.A film thickness (thickness) of this film is 0.22mm.Can reach a conductive coefficient λ of unit from 0.15K/Wm to 6.5K/Wm at this according to composite material (kind of polymeric material, the kind of filler and compactedness etc.).Although relatively thin thickness also can reach the resistance to pressure of 1kV to 6kV at this.
In order to guarantee especially to use a flexible film with composite material by cooling device heat extraction effectively.This film can plasticity and/or flexibly distortion.Described wire winding can be embedded in the film near form fit with connecting.Big especially at this thermal interface between described film and wire winding, produce heat conduction by this contact-making surface.
In a special improvement project, described cooling device has at least a casting material, this casting material has at least another kind of composite material that contains the filler of another kind of at least polymeric material and another kind of at least heat conduction, and this casting material is in direct heat conduction with wire winding and/or film and contacts.Described composite material can be identical or different with another kind of composite material.Each component of this composite material and another kind of composite material also can be identical or different.Described wire winding and/or film portion ground or be fully inserted in the casting material with another kind of composite material.Because described another kind of composite material be can heat conduction and because described embedding makes that presenting a kind of form fit almost completely between casting material and wire winding or film is connected, so can make the heat of wire winding and film pass through casting material to discharge very effectively.By using described casting material to cause a kind of even temperature to distribute in addition in inductance element inside.The wire winding of this element is cooled off equably.This point helps to improve the quality of inductance element equally.
Therefore not only can both between this casting material, film and wire winding, exist intermediate space (hollow space), this intermediate space to be full of air and help mutual heat insulation of casting material, film and wire winding for film but also for casting material.Because making, described intermediate space no longer can realize effective heat extraction.Therefore in a kind of special improvement project, one has a kind of Heat Conduction Material that is used for carrying out for this intermediate space hot cross-over connection (thermische Ueberbrueckung) at intermediate space between described film and the wire winding and/or between casting material and wire winding.The preferably complete falling heat-transfer material of this intermediate space.This point causes heat extraction from winding better.This is preferably used a kind of Heat Conduction Material, this Heat Conduction Material additionally also is an electric insulation.Therefore described Heat Conduction Material especially is selected from oil, cream, wax and/or bonding agent.Guarantee by material this heat conduction, the while electric insulation, even when using high working voltage, also obtain a kind of this required resistance to pressure.
The cooling device of described inductance element constitutes like this: make the heat that produces in the wire winding when inductance element is worked to discharge effectively.Composite material by cooling device continues to discharge heat for this reason.For example realize the continuation discharge of described heat by convection current.Have a kind of fluid of cooling device next door guiding of composite material, this fluid can receive heat for this reason.This fluid for example is a kind of liquid or a kind of gas or gaseous mixture.
The continuation of heat is discharged preferably and is realized by conducting heat.Therefore in a kind of special improvement project, described film and/or described casting material with composite material with composite material is connected with a heat-absorbing body with heat conduction by a kind of heat transfer mechanism.By means of described heat-absorbing body, be responsible for when inductance element is worked, between winding, cooling device and heat-absorbing body, existing as far as possible little temperature difference.Preferably constitute heat-absorbing body like this: make it can receive big heat for this reason.The thermal capacity of this heat-absorbing body is big.It is contemplated that also heat-absorbing body is responsible for discharging effectively heat.This heat-absorbing body for example is a cooling body of being made by a kind of material, and the feature of this material is high thermal conductivity.In order to keep heat gradient, this cooling body can cool off by convection current.
Described inductance element is a choking-winding or a transformer preferably.A choking-winding is through-flow for direct current.And in contrast by this choking-winding limiting AC electricity, this choking-winding has a kind of high reactance for high-frequency current.Described transformer is made up of at least two wire windings.But wire winding more than two also can be set to transformer.Also can select the transformer be made up of a wire winding, this wire winding is divided into two parts by an electric tap.
According to second viewpoint of the present invention, in an electric ballast, use inductance element, wherein convert an electric input power to an electric output power.Input power generally is different with power output.Especially have from comprising that 100kHz carries out work to the alternating voltage of the frequency of the scope that comprises 200MHz with one at this this element.This frequency range is called high-frequency range.In order to use in high frequency technique, this inductance element especially has a core body of being made by the ferromagnetic core material, and this core material is suitable for high frequency.For example this core material is a kind of ferrite of M33 core material form of the limiting frequency with an about 10MHz.This core material has manganese and zinc.It is contemplated that a kind of K1 equally, K6 or K12 core material.These core material have nickel and zinc.Described K6 core material has for example limiting frequency of 7MHz.
Aspect frequency applications, described wire winding preferably has a high frequency twisted wire of being made up of the solid conductor of many electrically insulated from one another.A twisted wire is a lead of being reeled or being woven by many tinsels (solid conductor).In a high frequency twisted wire, described solid conductor insulate each other, so that reduce because the loss that kelvin effect and eddy current cause.Have not the twisted wire of the solid conductor of mutually insulated and compare with one thus, realize a lower high frequency loss resistance with identical cross section.Described solid conductor especially has at least one by from comprising that 10 μ m are to comprising the solid conductor diameter of selecting 50 mu m ranges.Especially from comprising that 10 are selected described quantity (Vielzahl) to comprising 30 the scope.For example 10 and more solid conductor are formed a high frequency twisted wire.Make thus have relatively large surface, and have the wire winding of relatively low high frequency loss resistance thus.
In a kind of special improvement project, use a alternating voltage up to 2000V.Verified, though by means of described gap have also can realize when frequency is a few hectovolt voltage of several megahertzes a kind of high-quality.This can make described inductance element microminiaturization, and however also can realize one high-quality and low in high power flow under the situation of decreasing.Therefore this inductance element also can be called HF-HV (high-frequency and high-voltage) element of a microminiaturization.
Described inductance element also can be used to light a discharge lamp in a starting transformer.In order to light described discharge lamp, this discharge lamp is controlled by a circuit with high alternating voltage (starting voltage).Therefore use a potential pulse in another improvement project, it has an alternating voltage until 40kV.This inductance element is controlled with interior at a few μ m (ignition duration) by this high alternating voltage instantaneously.
In a word, the present invention has following major advantage:
-can discharge the heat that when inductance element is worked, in the wire winding, produces effectively by means of cooling device.By discharging described heat effectively, cause the small relatively temperature rise of wire winding.This small temperature rise causes resistance small relatively in the wire winding to increase.Realize thus a kind ofly comparing higher inductance element quality with a uncooled wire winding.
-by using described casting material, cause a kind of even temperature to distribute in addition in inductance element inside.The wire winding of this element is cooled off equably.This helps to improve the quality of inductance element equally.
-because effectively cooling, even under the situation of frequency applications, also can use a inductance element with microminiaturization of high power flow.
Description of drawings
By means of a plurality of embodiment and accompanying drawing the present invention is described in further detail below.This accompanying drawing is schematic diagram and does not illustrate with true ratio.
Fig. 1 to 3 illustrates an inductance element with a cooling device with lateral cross-section respectively,
Fig. 4 illustrates a part figure with inductance element of cooling device with a lateral cross-section,
Fig. 5 illustrates an inductance element from the side,
Fig. 6 a and 6b overlook ground and in a RM planform along inductance element core body shown in the cross-sectional view that cuts off line I-I.
Embodiment
Described inductance element 1 is a HF-HV (high-frequency and high-voltage) transformer (Fig. 5).This element 1 has a wire winding 3 and a core body 4.This wire winding twines the lead of wire winding 3 by 12 expressions of a winding axis along this winding axis.This wire winding 3 is the high frequency twisted wires 14 with 30 solid conductors.The diameter of wire of a solid conductor is about 30 μ m.Described core body 4 is ferrite cores and made by a kind of M33 core material.This core body has a RM6 core body shape (Fig. 6 a and 6b).This core body is an E core body and the composition with alms bowl core body of a centre bore 15.This core body 4 has a core body center clearance 7, and it is arranged in the inner portion 10 of wire winding 3 around centre bore 15.Other two gaps 8 are separately positioned in the outer portion 11 of wire winding 3 in one of core side leg 6 of core body 4.All three gaps 7 and 8 all are the air gaps.This gap 7 and 8 gap width are about 3mm respectively substantially widely.
Described core body substantial symmetry.It is formed with the symmetrically arranged part 5 of minute surface 13 mirror images by two, and this part is arranged on gap 7 and 8 next doors opposed to each other and passes through gap width 9 space distances.Described minute surface 13 is arranged in three gaps 7 and 8.Not only make core body 4 but also wire winding 3 is provided with substantially symmetrically by this structure.Obtain an inductance element thus, it is symmetrical for minute surface 13 basically.
In order to realize a relative higher H F-HV transformer quality, wire winding 3 is cooled off.There is a cooling device 20 that is used for cool metal filament winding group 3 for this reason.This cooling device 20 has a film 21 that has a kind of composite material of heat conduction.The stock of this composite material is a kind of heat conduction and poor conductive polymeric material.In polymeric material, add a kind of filler with high heat conduction and low electric conductivity.This film 21 has the thickness of an about 0.22mm.The conductive coefficient λ of unit is about 4K/Wm.The electricity resistance to pressure reaches about 6kV.
The high frequency twisted wire 14 of described wire winding 3 and film 21 twine around a winding body 30 that is matched with RM6 core body shape.Be provided with around winding body 30 like this at this this film 21 and wire winding 3: make the high frequency twisted wire 14 of wire winding 3 and film 21 alternately twine (Fig. 1 and 2) diametrically from winding body 30 beginnings.Employed film 21 is used as the intermediate insulating layer of the high frequency twisted wire 14 of wire winding 3.Obtain one thus and leave the effective diametrically heat extraction path 24 of wire winding 3.Discharge the heat that when inductance element is worked, in high frequency twisted wire 14, produces effectively along heat extraction path 24.
According to one to this interchangeable execution mode, the high frequency twisted wire 14 of described wire winding 3 and a plurality of film 21 itself are radially aimed at winding body 30 (Fig. 3) respectively.Realize a multicell solution thus, it is also referred to as the dish type winding.Also be responsible for heat extraction effectively at this by heat extraction path 24.
In order to continue to discharge heat, the cooling device 20 of inductance element 1 or inductance element 1 is joined in the casting material 22 (Fig. 1 and 3) with another kind of composite material that can heat conduction.Casting material 22 directly contacts with the part of wire winding 3 with heat conduction.This means, heat can be discharged by heat transfer by the high frequency twisted wire 14 of wire winding 3 and the thermal interface between the film 21.In order to discharge heat effectively, casting material 22 is connected with heat conduction by conducting heat with heat-absorbing body 25.Described heat-absorbing body 25 is plates of being made by a kind of highly heat-conductive material.When working, inductance element between wire winding 3 and heat-absorbing body 25, produces the relative little temperature difference thus.
Also can select to continue heat extraction (Fig. 2) for casting material 22 by a heat extraction overlap 26 with relative high thermal conductivity.Heat extraction overlap 26 is connected with film 21 by an interval pottery with higher relatively conductive coefficient 28, by this heat conduction overlap the heat continuation of film 21 or wire winding 3 is discharged towards heat-absorbing body 25 directions.
Not only can have intermediate space 27 under the situation of casting material 22 but also under the situation of film 21, this intermediate space reduces the efficient of wire winding 3 with its cooling.Make these intermediate spaces 27 by a kind of heat conduction and electric insulation or conduct electricity bad cream and fill according to another execution mode.
Claims (12)
1. be used to form the inductance element (1) of a magnetic loop, this inductance element has at least one wire winding (3) and at least one is used to cool off the cooling device (20) of this wire winding (3), it is characterized in that, described cooling device (20) has at least a composite material that contains the filler of at least a polymeric material and at least a heat conduction, described cooling device (20) has at least a casting material (22), this casting material has the another kind of at least composite material that contains the filler of another kind of at least polymeric material and another kind of at least heat conduction, and this casting material is in direct heat conduction with wire winding (3) and/or film (21) and contacts, one is present between film (21) and the wire winding (3), and/or be present in intermediate space (27) between casting material (22) and the wire winding (3) and have a kind of hot cross-over connection of Heat Conduction Material carry out to(for) intermediate space (27) of being used for, described Heat Conduction Material is selected from oil, cream, wax and/or bonding agent.
2. element as claimed in claim 1, wherein, described cooling device (20) has at least one film that contains described composite material (21), and this film is in direct heat conduction with described wire winding and contacts.
3. element as claimed in claim 1, wherein, described film (21) and/or described casting material (22) with another composite material with composite material is connected with a heat-absorbing body (25) with heat conduction by a kind of heat transfer mechanism.
4. wherein, there is one in element as claimed in claim 1 and has a kind of core body that is applicable to the ferromagnetic core of high frequency.
5. element as claimed in claim 1, wherein, described wire winding (3) has a kind of high frequency twisted wire (14), and this high frequency twisted wire has the solid conductor of many electrically insulated from one another.
6. element as claimed in claim 5, wherein, described solid conductor has at least one from comprising that 10 μ m are to comprising the solid conductor diameter of selecting 50 mu m ranges.
7. as claim 3 or 6 described elements, wherein, select quantity to comprising 30 the scope from comprising 10.
8. element as claimed in claim 1, wherein, described element is a choking-winding or a transformer.
In an electric ballast for a application as each described element in the claim 1 to 8, wherein, convert an electric input power to an electric output power.
10. application as claimed in claim 9, wherein, described element has from comprising that 100kHz carries out work to the alternating voltage of the frequency that comprises the 200MHz scope with a kind of.
11., wherein, use a kind of alternating voltage up to 2000V as claim 9 or 10 described application.
12. application as claimed in claim 10 wherein, is used a kind of potential pulse, it has an alternating voltage until 40kV.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10332842A DE10332842A1 (en) | 2003-07-18 | 2003-07-18 | Inductive component with cooling device and use of the device |
| DE10332842.4 | 2003-07-18 | ||
| PCT/EP2004/007739 WO2005013296A1 (en) | 2003-07-18 | 2004-07-13 | Inductive component with a cooling device and use of said component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1839450A CN1839450A (en) | 2006-09-27 |
| CN1839450B true CN1839450B (en) | 2010-12-08 |
Family
ID=34041955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004800206225A Expired - Fee Related CN1839450B (en) | 2003-07-18 | 2004-07-13 | Inductive component with a cooling device and use of said component |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1647037B1 (en) |
| KR (1) | KR20060037366A (en) |
| CN (1) | CN1839450B (en) |
| AT (1) | ATE448555T1 (en) |
| DE (2) | DE10332842A1 (en) |
| TW (1) | TW200509154A (en) |
| WO (1) | WO2005013296A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005008521A1 (en) | 2005-02-24 | 2006-08-31 | OCé PRINTING SYSTEMS GMBH | Arrangement and method for cooling a power semiconductor |
| DE102005019114A1 (en) | 2005-04-25 | 2006-10-26 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Electronic device, especially voltage adapter, has electric coil arranged on component reservoir and arrangement for carrying away heat generated by electric coil via component reservoir |
| KR100774673B1 (en) * | 2006-08-11 | 2007-11-08 | 현대자동차주식회사 | Heat radiation structure for transformer of dc/dc converter |
| WO2011082392A1 (en) * | 2010-01-04 | 2011-07-07 | Lineagen, Inc. | Gene biomarkers of lung function |
| FR2959858B1 (en) * | 2010-05-04 | 2012-07-13 | Adeneo | DEVICE FOR COOLING A MAGNETIC COMPONENT |
| DE102011080256A1 (en) * | 2011-08-02 | 2012-10-04 | Osram Ag | Transformer for ballast used for LED lamp, has primary-side connecting pin and secondary-side connection pin which are provided on mounting face of base, and spacer devices are adapted to vary spacing of mounting face of base to the board |
| DE102011082045A1 (en) | 2011-09-02 | 2013-03-07 | Schmidhauser Ag | Throttle and related manufacturing process |
| DE102013208653A1 (en) * | 2013-05-10 | 2014-11-13 | Sts Spezial-Transformatoren-Stockach Gmbh & Co. Kg | Inductive component |
| DE102013217728A1 (en) * | 2013-09-05 | 2015-03-05 | Siemens Aktiengesellschaft | coil assembly |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4885445A (en) * | 1987-12-09 | 1989-12-05 | Kabushiki Kaisha Toshiba | High-frequency transformer for microwave oven |
| US5189080A (en) * | 1989-04-25 | 1993-02-23 | Robert Bosch Gmbh | Epoxy resin composition for encapsulating electric circuit components |
| US6198373B1 (en) * | 1997-08-19 | 2001-03-06 | Taiyo Yuden Co., Ltd. | Wire wound electronic component |
| US6259347B1 (en) * | 1997-09-30 | 2001-07-10 | The United States Of America As Represented By The Secretary Of The Navy | Electrical power cooling technique |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE6916811U (en) * | 1969-04-25 | 1969-10-02 | Schlenker Maier Elektro Joh | TRANSFORMER WITH HOUSING |
| JPS5928975B2 (en) * | 1975-06-16 | 1984-07-17 | 松下電器産業株式会社 | transformer |
| DE8903618U1 (en) * | 1989-03-22 | 1989-05-03 | Blaupunkt-Werke Gmbh, 3200 Hildesheim, De | |
| DE4317368A1 (en) * | 1993-05-25 | 1994-12-01 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Method for operating a high-pressure discharge lamp |
| EP1523748B1 (en) * | 2002-07-19 | 2008-04-23 | Siemens Aktiengesellschaft | Inductive component and use of said component |
-
2003
- 2003-07-18 DE DE10332842A patent/DE10332842A1/en not_active Ceased
-
2004
- 2004-07-13 CN CN2004800206225A patent/CN1839450B/en not_active Expired - Fee Related
- 2004-07-13 AT AT04763199T patent/ATE448555T1/en not_active IP Right Cessation
- 2004-07-13 EP EP04763199A patent/EP1647037B1/en not_active Not-in-force
- 2004-07-13 DE DE502004010352T patent/DE502004010352D1/en active Active
- 2004-07-13 KR KR1020067001089A patent/KR20060037366A/en not_active Application Discontinuation
- 2004-07-13 WO PCT/EP2004/007739 patent/WO2005013296A1/en active Application Filing
- 2004-07-14 TW TW093120934A patent/TW200509154A/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4885445A (en) * | 1987-12-09 | 1989-12-05 | Kabushiki Kaisha Toshiba | High-frequency transformer for microwave oven |
| US5189080A (en) * | 1989-04-25 | 1993-02-23 | Robert Bosch Gmbh | Epoxy resin composition for encapsulating electric circuit components |
| US6198373B1 (en) * | 1997-08-19 | 2001-03-06 | Taiyo Yuden Co., Ltd. | Wire wound electronic component |
| US6259347B1 (en) * | 1997-09-30 | 2001-07-10 | The United States Of America As Represented By The Secretary Of The Navy | Electrical power cooling technique |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10332842A1 (en) | 2005-02-10 |
| DE502004010352D1 (en) | 2009-12-24 |
| EP1647037A1 (en) | 2006-04-19 |
| CN1839450A (en) | 2006-09-27 |
| TW200509154A (en) | 2005-03-01 |
| WO2005013296A1 (en) | 2005-02-10 |
| ATE448555T1 (en) | 2009-11-15 |
| KR20060037366A (en) | 2006-05-03 |
| EP1647037B1 (en) | 2009-11-11 |
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