EP2533255A1 - Inducteur de champ magnétique - Google Patents
Inducteur de champ magnétique Download PDFInfo
- Publication number
- EP2533255A1 EP2533255A1 EP12171066A EP12171066A EP2533255A1 EP 2533255 A1 EP2533255 A1 EP 2533255A1 EP 12171066 A EP12171066 A EP 12171066A EP 12171066 A EP12171066 A EP 12171066A EP 2533255 A1 EP2533255 A1 EP 2533255A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- trace
- inductor
- plate
- plates
- presenting
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000011810 insulating material Substances 0.000 claims abstract description 3
- 230000004907 flux Effects 0.000 claims description 9
- 239000003302 ferromagnetic material Substances 0.000 claims description 6
- 239000002966 varnish Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 description 17
- 238000004804 winding Methods 0.000 description 9
- 239000004020 conductor Substances 0.000 description 8
- 230000005294 ferromagnetic effect Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 230000000284 resting effect Effects 0.000 description 6
- 230000006698 induction Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000679 solder Inorganic materials 0.000 description 3
- 230000001225 therapeutic effect Effects 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- MPTQRFCYZCXJFQ-UHFFFAOYSA-L copper(II) chloride dihydrate Chemical compound O.O.[Cl-].[Cl-].[Cu+2] MPTQRFCYZCXJFQ-UHFFFAOYSA-L 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005549 size reduction Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000007920 subcutaneous administration Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F17/0013—Printed inductances with stacked layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F2017/0066—Printed inductances with a magnetic layer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/0006—Printed inductances
- H01F2017/0073—Printed inductances with a special conductive pattern, e.g. flat spiral
Definitions
- the present invention relates to a magnetic field inductor.
- Magnetic field inductors currently consist of solenoids formed from an electrical conductor (electric wire) wound in several coil turns to form a coil.
- the magnetic field intensity at the centre is equal to the sum of that generated by each turn.
- the induction value obtained by the coil will not be exactly the algebraic sum of that generated by each individual turn, but there will be a loss due to the fact that each coil turn has a physical thickness and withdraws from the centre in every direction with the progress of the winding and the superimposing of the layers. Moreover every coil composed of a large number of turns is provided with a plastic support (spool) on which the wire is wound.
- each coil winding has its own thickness it withdraws increasingly more from the centre, both in the depth direction and by incrementing its starting radius.
- incrementing the induction level is mainly achieved by adding more turns to create a coil, however in this manner the distance from the centre continuously increases in all directions and the efficiency decreases, so incrementing the electrical resistance and incrementing the inductive level of the system, hence slowing down the system in the transient regime and increasing the coil weight and cost.
- an electromagnet is obtained which continuously and alternately attracts and repels any ferromagnetic material or polar substance positioned in proximity thereto.
- This principle is utilized in the electro medical field and specifically in the magnetotherapy field.
- the human body is composed largely of water (which is a polar substance)
- the pulsating electromagnet stresses the cutaneous and subcutaneous zone with continuous attraction or repulsion actions, to provide therapeutic action.
- electromedical appliances implement the electromagnet or LF (low frequency) emitter with frequencies which range up to a maximum of 200 Hz, using a coil of any size, power and final geometry, however this is always formed by winding a conductor to form a coil able to generate a determined size of pulsating magnetic field.
- LF low frequency
- a normal 100 Gauss coil used in the electromedical field has a weight of about 167 g for a diameter of 60 cm and a height of 16.5 cm.
- known coils provide a magnetic field which is not specifically suitable in magnetotherapy applications, in that this develops outside the solenoid in the axial direction from both sides of the coil, both from the side on which the treatment is to be carried out and on the opposite side, hence there is a loss of system efficiency and the result obtained does not exactly conform to that desired.
- An object of the present invention is therefore to provide a magnetic field inductor which represents an improvement over the known art.
- a further object of the present invention is to provide an inductor which, for the same generated magnetic field, is lighter and of smaller dimensions than traditional coils, for the same generated magnetic field.
- the main size reduction regards the emitter thickness, which is further reduced by there being no need for the winding spool.
- the present invention enables improved dissipation of the heat generated by the direct or pulsating electric current passing through the coil turns or through the constituent traces of the emitter.
- a further advantage of the present invention is that of providing an inductor enabling a magnetic field to be obtained which develops mainly on a single side, being concentrated towards a single direction and a specific area of use.
- the emitter is formed from a plurality of individual superimposed layers (or plates) A, B, C, D, E which are adhesive-bonded and pressed together.
- Each emitter layer is substantially a printed circuit on a printed circuit board (PCB).
- PCB printed circuit board
- the symbol PCB indicates an insulating material base (usually epoxy resin reinforced with glass fibre) on which connection lines of conductive material (usually copper) are formed between the circuit elements.
- a PCB is known as mono- or single-face type when composed of a single layer of insulating resin and a single layer of conductive material which is the photographic image of the electrical connections to be obtained.
- a PCB is produced starting from a plate of insulating resin on which a thin homogeneous sheet of copper has been applied to totally cover the insulating base. The part not involved in the image to be obtained is then eroded by a series of photographic and chemical processes, to obtain at the end of the process an insulating base with the photographic image of the desired circuit in conductive material.
- the PCB in the form of a semifinished product is suitably bored with a specific numerically controlled drill to facilitate its connection to other components.
- the PCB usually undergoes a series of enhancements to finish the product, including the application of an electrically insulating varnish known as "solder resist" by a masking process, implemented only at the points where the PCB must not have electrical access to the outside, by which the traces and the areas at voltage become totally insulated, on one side by the base resin and on the other side by the solder resist protective varnish, to leave uncovered only the trace ends, i.e. where normally soldering is carried out to connect a component or a wire or a connection towards the outside.
- solder resist electrically insulating varnish
- the PCB usually undergoes two further finishing processes, such as the application of a silk screen print by which an actual design is made with a non-conductive varnish to facilitate identification of the components or to print other information useful in recognizing the product.
- a further process undergone by the PCB is the surface treatment of those areas exposed to the air (not covered by solder resist), to ensure their protection against the typical oxidation of bare copper, this treatment typically being a covering with tin alloy spread hot on the PCB, or a chemical or electrolytic deposition such as silver or gold plating if extreme planarity or very low contact resistances are required.
- the present invention relates to a multi-layer double-face emitter.
- a double-face circuit is composed of a single insulating resin support on which two copper sheets are applied, one on each side of the support, these being processed simultaneously as aforedescribed.
- the final circuit can be more complex, because in this case a wire connection is emulated at which the conductors can mutually cross and be superimposed, enabling a more complex scheme to be implemented.
- This procedure requires a more well-organized production process to enable a connection present on one side to be able to also continue on the opposite side.
- a through hole is made at the point in which the two layers are to be connected together, then by means of an electrolytic process a conductive galvanic deposit is formed within the hole, the applied material cladding the walls of the hole to connect together the two traces present on the opposite sides.
- This connection type is known as a "metallized hole” or "metallization”.
- a trace of small thickness (usually from 30 to 100 ⁇ m) is formed extending as a spiral, or any other geometry of convenience able to concentrate the magnetic field generated by the passage of electric current in a predefined single point, which is usually but not essentially the centre.
- FIG. 1 shows a first face A1 of a plate A made of insulating resin.
- a trace 5 is formed of spiral shape.
- the trace thickness is usually between 10 and 200 ⁇ m, preferably 70/100 ⁇ m
- the plate width is between 0.1 and 20 mm, preferably 1 mm
- each side of the plate presents a number of turns between 1 and 200, preferably 20.
- a base material is used in which the sum of the copper trace and of the insulating resin gives a total thickness of 0.25 mm for each individual layer.
- the final shape of the product is totally arbitrary; in the specific example, although the traces are of circular pattern, the outer profile of the emitter is square (of 58 mm side), but could be adapted to any convenient geometry.
- the trace extends from a first contact 12 to a second contact 7. These serve to electrically power the spiral.
- the contact 12 represents one end of the emitter
- the contact 7 represents an intermediate point thereof, namely a point which joins to the next side of the printed circuit.
- the plate A presents a second face A2 opposite the first.
- a second trace (not shown) is formed having the shape, characteristics and axis 6 substantially identical to those of the first trace, the only difference being the on the second face the spiral turn is designed specularly such that the current path and the consequent magnetic field generation do not change direction and hence does not nullify that generated on the first layer but instead adds to it.
- This however is connected to the contact 7 and to the contact 13 in proximity to the axis 6.
- the electrical connections between the trace on the first face and that on the second face, the geometry of the paths and the geometry of the connections ensure that the current circulates always in the same direction about the axis 6, hence enabling magnetic fields to be generated which are added together at the axis.
- a second plate B, a third plate C, a fourth plate D and a fifth plate E are adhesive-bonded and pressed on the first plate A.
- All the plates A, B, C, D, E (five in all) and the traces formed on them (ten in all) are substantially identical in pairs (i.e. the turns present on the five upper sides and the turns present on the five lower sides of each plate are identical to each other with the exception of the contacts to which these are connected, which are those indicated by the numerals from 7 to 11, and from 12 to the final contact (not shown).
- listing the connections are: 12 (inlet conductor connection), 7 (joins side 1 to side 2 concerning the plate A), 13 (joins side 2 to side 3 concerning the plates A and B), 8 (joins side 3 to side 4 concerning the plate B), 14 (joins side 4 to side 5 concerning the plates B and C), 9 (joins side 5 to side 6 concerning the plate C), 15 (joins side 6 to side 7 concerning the plates C and D), 10 (joins side 7 to side 8 concerning the plate D), 16 (joins side 8 to side 9 concerning the plates D and E), 11 (joins side 9 to side 10 concerning the plate E), final contact at outlet.
- the plate E (i.e. the last) can be positioned resting on (or fixed for example by glue or other manner to) a layer of electrically insulating but thermally conductive rubber.
- the rubber layer is then associated on the opposite side of the plate E to a sheet of ferromagnetic material 3.
- the rubber positioned in contact with the lower side of the emitter (in this case the plate E) enables the active electric power to be dispersed, i.e. to dissipate in advantageous manner the heat produced by the current flowing through the traces, so transporting this heat from the active part of the emitter to the ferromagnetic backing plate which here also acts as a thermal dissipater.
- the planar shape of the product, the absence of winding spools, and the fact that the coil turns are not wound but are formed on the printed circuit by tracing any desired geometry, enable any regular or irregular final shape to be obtained.
- a further innovation is the already described application of a ferromagnetic backing plate to compress the flux lines.
- this electromagnetic field modification is particularly useful for those emitters used in the electromedical field which utilize the magnetic flux generated by a single side. These are usually rested on the zone to be treated.
- the circular nature of traditional coils makes the emitter develop the flux lines symmetrically on both sides of the emitter, dispersing one half of the generated magnetic field which is hence not used for therapeutic purposes.
- the present invention also provides other advantageous advantages compared with traditional coils.
- PCB technology enables the emitters to demonstrate performance differences between product units pertaining either to the same batch or to different batches which are much smaller than that which can generally be obtained on comparing the performance differences of several coils constructed to the same specification.
- the high confidence range is due mainly to the high packing geometry of the wire which at each revolution rests in the spool with a certain position tolerance, moreover the tension (winding torque) with which the wire is wound makes a considerable difference because the coil can become more or less compact, hence varying its final performance.
- a flat coil integrated on a PCB given its flat geometry, also enables devices to be constructed of smaller dimensions, less bulky and lighter in weight.
- the use of the present invention enables a pulsatingly controlled electromagnet or a pulsating magnetic emitter to be created, to obtain a determined magnetic induction value on its surface.
- the figures show by way of example an emitter implemented on a PCB of 10 layers.
- Figure 1 shows how the turn geometry is visible at the surface on one of the two outer sides (a ten-layer PCB presents eight internally hidden sides and two surface visible sides).
- a ten-layer PCB presents eight internally hidden sides and two surface visible sides.
- the ten superimposed layers are shown together with the metallized holes used to connect each side to the next in order to simulate a continuously wound wire, i.e. to emulate a coil.
- a further advantage achieved by implementing such pulsating magnetic field inductors on a PCB support lies in the fact that because of the small thickness several inductors can be stacked to still achieve an acceptable efficiency. If in contrast several air-wound coils were stacked, seeing the considerable thickness, the emissions of the first coil would be nullified before reaching the outer surface of the second and so on.
- the geometry of the spirally wound copper trace present on each side of the PCB possesses a flat and wide geometry, presenting a contact surface to the outside which is much larger than that achievable with an enamelled conductor of circular cross-section used in forming traditional coils, this fact aiding the dispersion of the heat generated by the passage of electric current.
- a radiofrequency transmission antenna can be integrated into at least one side of the emitter, usually the most outer side towards the treatment area, to hence enable combination emitters to be implemented in which the therapeutic effects of low frequency (pulsating magnetic field) and of high frequency (radio waves) can be added together.
- This implementation or the extension of this concept enables electronic measurement and control circuits to be integrated into the same emitter, making the device intelligent and reducing costs and dimensions.
- spiral turns of the traces present on the various constituent plates of the inductor present a substantially circular path, however alternative embodiments can assume any shape, regular or irregular (square, rectangular, elliptical, composite geometries of any extent and type).
- the aforedescribed inductor taken as an example to described the invention is formed from five double layer plates adhesive-bonded and pressed together (ten layers in total), this number can obviously be increased or decreased or more finished figures can be stacked with or without the use of the ferromagnetic backing plate, to form emitters of adequate power capable of enabling emission of a magnetic flux of required extent and geometry.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Magnetic Treatment Devices (AREA)
- Coils Or Transformers For Communication (AREA)
- Soft Magnetic Materials (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT001036A ITMI20111036A1 (it) | 2011-06-09 | 2011-06-09 | Induttore di campo magnetico |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2533255A1 true EP2533255A1 (fr) | 2012-12-12 |
EP2533255B1 EP2533255B1 (fr) | 2014-01-29 |
Family
ID=44554943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20120171066 Active EP2533255B1 (fr) | 2011-06-09 | 2012-06-06 | Inducteur de champ magnétique |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2533255B1 (fr) |
ES (1) | ES2460923T3 (fr) |
IT (1) | ITMI20111036A1 (fr) |
PT (1) | PT2533255E (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITUB20152081A1 (it) * | 2015-07-10 | 2017-01-10 | Thereson S P A | Procedimento di produzione di un diffusore e corrispondente diffusore |
WO2019092653A1 (fr) * | 2017-11-10 | 2019-05-16 | I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini | Dispositif de chauffage par induction pour une table de cuisson |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB639591A (en) * | 1947-09-08 | 1950-06-28 | Standard Telephones Cables Ltd | Improvements in or relating to inductive electrical windings |
GB1440304A (en) * | 1974-11-29 | 1976-06-23 | Mullard Ltd | Transmission line pulse transformers |
JPS58212114A (ja) * | 1982-06-02 | 1983-12-09 | Showa Electric Wire & Cable Co Ltd | コイルの含浸処理方法 |
US4494100A (en) * | 1982-07-12 | 1985-01-15 | Motorola, Inc. | Planar inductors |
DE8801879U1 (de) * | 1988-02-13 | 1988-04-07 | Akyürek, Altan, Dipl.-Ing., Wien | Induktivität für Leistungselektronik- bzw. Leistungselektrikanwendungen |
EP0428142A2 (fr) * | 1989-11-15 | 1991-05-22 | The B.F. Goodrich Company | Construction de bobine plane |
DD290738A5 (de) * | 1989-12-22 | 1991-06-06 | Veb Robotron-Messelektronik,"Otto Schoen",De | Sende- und/oder empfangsspule aus mehrebenenleiterplatte |
US20030102517A1 (en) * | 2001-12-05 | 2003-06-05 | Micron Technology Inc., A Corporation Of Delaware | Semiconductor device with electrically coupled spiral inductors |
WO2005020254A2 (fr) * | 2003-08-26 | 2005-03-03 | Philips Intellectual Property & Standards Gmbh | Bobine d'inductance flexible ultra-mince |
FR2894061A1 (fr) * | 2005-11-30 | 2007-06-01 | Commissariat Energie Atomique | Micro-bobine multicouches |
US20080061917A1 (en) * | 2006-09-12 | 2008-03-13 | Cooper Technologies Company | Low profile layered coil and cores for magnetic components |
US20080164840A1 (en) * | 2007-01-09 | 2008-07-10 | Sony Ericsson Mobile Communications Japan, Inc. | Noncontact power-transmission coil, portable terminal, and terminal charging device |
EP1965396A1 (fr) * | 2005-12-07 | 2008-09-03 | Sumida Corporation | Bobine souple |
-
2011
- 2011-06-09 IT IT001036A patent/ITMI20111036A1/it unknown
-
2012
- 2012-06-06 ES ES12171066T patent/ES2460923T3/es active Active
- 2012-06-06 PT PT12171066T patent/PT2533255E/pt unknown
- 2012-06-06 EP EP20120171066 patent/EP2533255B1/fr active Active
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB639591A (en) * | 1947-09-08 | 1950-06-28 | Standard Telephones Cables Ltd | Improvements in or relating to inductive electrical windings |
GB1440304A (en) * | 1974-11-29 | 1976-06-23 | Mullard Ltd | Transmission line pulse transformers |
JPS58212114A (ja) * | 1982-06-02 | 1983-12-09 | Showa Electric Wire & Cable Co Ltd | コイルの含浸処理方法 |
US4494100A (en) * | 1982-07-12 | 1985-01-15 | Motorola, Inc. | Planar inductors |
DE8801879U1 (de) * | 1988-02-13 | 1988-04-07 | Akyürek, Altan, Dipl.-Ing., Wien | Induktivität für Leistungselektronik- bzw. Leistungselektrikanwendungen |
EP0428142A2 (fr) * | 1989-11-15 | 1991-05-22 | The B.F. Goodrich Company | Construction de bobine plane |
DD290738A5 (de) * | 1989-12-22 | 1991-06-06 | Veb Robotron-Messelektronik,"Otto Schoen",De | Sende- und/oder empfangsspule aus mehrebenenleiterplatte |
US20030102517A1 (en) * | 2001-12-05 | 2003-06-05 | Micron Technology Inc., A Corporation Of Delaware | Semiconductor device with electrically coupled spiral inductors |
US20050099260A1 (en) * | 2001-12-05 | 2005-05-12 | Micron Technology, Inc., A Corporation Of Delaware | Semiconductor device with electrically coupled spiral inductors |
WO2005020254A2 (fr) * | 2003-08-26 | 2005-03-03 | Philips Intellectual Property & Standards Gmbh | Bobine d'inductance flexible ultra-mince |
FR2894061A1 (fr) * | 2005-11-30 | 2007-06-01 | Commissariat Energie Atomique | Micro-bobine multicouches |
EP1965396A1 (fr) * | 2005-12-07 | 2008-09-03 | Sumida Corporation | Bobine souple |
US20080061917A1 (en) * | 2006-09-12 | 2008-03-13 | Cooper Technologies Company | Low profile layered coil and cores for magnetic components |
US20080164840A1 (en) * | 2007-01-09 | 2008-07-10 | Sony Ericsson Mobile Communications Japan, Inc. | Noncontact power-transmission coil, portable terminal, and terminal charging device |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITUB20152081A1 (it) * | 2015-07-10 | 2017-01-10 | Thereson S P A | Procedimento di produzione di un diffusore e corrispondente diffusore |
EP3115999A1 (fr) * | 2015-07-10 | 2017-01-11 | Thereson S.p.A. | Procédé de production d'un diffuseur et diffuseur correspondant |
WO2019092653A1 (fr) * | 2017-11-10 | 2019-05-16 | I.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini | Dispositif de chauffage par induction pour une table de cuisson |
CN111656863A (zh) * | 2017-11-10 | 2020-09-11 | I.R.C.A.(共同)股份公司工业铠装及类似电阻 | 用于炉顶部的感应加热器 |
CN111656863B (zh) * | 2017-11-10 | 2022-10-14 | I.R.C.A.(共同)股份公司工业铠装及类似电阻 | 用于炉顶部的感应加热器 |
Also Published As
Publication number | Publication date |
---|---|
ITMI20111036A1 (it) | 2012-12-10 |
PT2533255E (pt) | 2014-05-07 |
EP2533255B1 (fr) | 2014-01-29 |
ES2460923T3 (es) | 2014-05-16 |
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