CN107093515B - A kind of inductance, transformer and electrical equipment - Google Patents
A kind of inductance, transformer and electrical equipment Download PDFInfo
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- CN107093515B CN107093515B CN201610091031.1A CN201610091031A CN107093515B CN 107093515 B CN107093515 B CN 107093515B CN 201610091031 A CN201610091031 A CN 201610091031A CN 107093515 B CN107093515 B CN 107093515B
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- 239000004020 conductor Substances 0.000 claims abstract description 112
- 230000004907 flux Effects 0.000 claims abstract description 26
- 230000002401 inhibitory effect Effects 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims description 122
- 239000002184 metal Substances 0.000 claims description 122
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 23
- 230000000694 effects Effects 0.000 abstract description 15
- 238000004891 communication Methods 0.000 abstract description 2
- 230000006698 induction Effects 0.000 description 16
- 230000005347 demagnetization Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 230000008878 coupling Effects 0.000 description 9
- 238000010168 coupling process Methods 0.000 description 9
- 238000005859 coupling reaction Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 238000004088 simulation Methods 0.000 description 7
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/346—Preventing or reducing leakage fields
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
-
- 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
- H01F17/045—Fixed inductances of the signal type with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The present invention relates to field of communication technology, a kind of inductance, transformer and electrical equipment are disclosed.The inductance and transformer include: coil；The metallic conductor being electrically insulated with the coil, the position for cutting the coil leakage magnetic flux magnetic line of force is arranged in the metallic conductor, and the metallic conductor incudes the magnetic field to be formed and inhibit the coil leakage field.In the above-mentioned technical solutions, incude to form the magnetic field for inhibiting the coil leakage field and leakage field counteracting by the metallic conductor of setting, to reduce influence of the electronic product leakage field to other electronic products, improve the effect of electromagnetic compatibility between electronic product.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an inductor, a transformer and electrical equipment.
Background
At present, the problem of electromagnetic compatibility of electronic products is more and more emphasized by people, particularly, a set of complete electromagnetic compatibility system is formed in developed countries in the world, and meanwhile, the electromagnetic compatibility system is also being established in China, so that the realization of the electromagnetic compatibility of the products is a pass for entering the international market. For the switching power supply, because the switching tube and the rectifying tube work under the conditions of large current and high voltage and can generate strong electromagnetic interference to the outside, the switching power supply is more difficult to realize electromagnetic compatibility compared with other products.
The conducted disturbance of the switch power supply is electromagnetic interference which is transmitted outwards through an input power line of the power supply, the test frequency range is 150 kHz-30 MHz, and the limit values are shown in the following table I
Watch 1
Typically, to meet the supply port conducted disturbance limit, a filter circuit is added between the switching power supply and the power input line. The circuit functions to reduce conduction disturbances of the switching power supply propagating along the power input line. In the industry, a common filter circuit is composed of an inductor and a capacitor, as shown in fig. 1. The conduction disturbance of the power port does not meet the requirement of a limit line, and is a common electromagnetic compatibility problem of the power port. To solve this problem, first, three elements of the electromagnetic compatibility problem need to be known: disturbance source, coupling path, receiver.
Disturbance source: source of transmission interference
Coupling path: carrier for propagating interference
A receiver: disturbed object
In general, any of the three elements can be solved by implementing an effective countermeasure.
With the increasing power of power supplies and the increasing layout density of devices, the problem of electromagnetic coupling inside and outside the power supplies is also more and more serious. The common electromagnetic coupling between the switching power supply and the filter circuit can reduce the filtering effect of the filter circuit, so that the power supply conduction disturbance test cannot pass, and the common electromagnetic coupling becomes a pain point of the power supply product design.
Disclosure of Invention
The invention provides an inductor, a transformer and electrical equipment, which are used for improving the magnetic leakage condition of the inductor and the transformer and improving the electromagnetic compatibility of the electrical equipment.
In a first aspect, an inductor is provided, which includes:
a coil;
and the metal conductor is electrically insulated from the coil and arranged at a position for cutting magnetic force lines of leakage flux of the coil, and the metal conductor induces and forms a magnetic field for inhibiting the magnetic flux leakage of the coil.
In the technical scheme, the magnetic field of the magnetic flux leakage of the coil is offset with the magnetic flux leakage through the induction of the set metal conductor, so that the influence of the magnetic flux leakage of the electronic product on other electronic products is reduced, and the effect of electromagnetic compatibility among the electronic products is improved.
In a specific aspect, the inductor further includes an iron core, the coil is wound around the iron core, and the metal conductor is fixed to the iron core. The coil is supported through the iron core, and the metal conductor is arranged on the iron core, so that the metal conductor is convenient to fix.
When the iron core is in a columnar structure, the metal conductor is a flat plate type metal conductor.
In order to allow as much magnetic flux as possible to pass through the metal conductor, the distance between the metal conductor and the coil is less than 10mm when the metal conductor is disposed. Thereby ensuring that as many magnetic lines of force as possible pass through the metal conductor, and in a preferred embodiment, the distance between the metal conductor and the coil is preferably 2-5 mm.
In order to further improve the magnetic force lines passing through the metal conductor, preferably, the included angle between the metal conductor and the coil axis is between 60 ° and 90 °.
In order to improve the demagnetization effect, preferably, the metal conductor includes a multi-layered metal sheet structure. And demagnetizing by a magnetic field formed by each layer of metal sheet structure.
In a second aspect, there is provided a transformer, comprising:
iron core:
a coil wound around the core;
and the metal conductor is electrically insulated from the coil and arranged at a position for cutting magnetic force lines of leakage flux of the coil, and the metal conductor induces and forms a magnetic field for inhibiting the magnetic flux leakage of the coil.
In the technical scheme, the magnetic field of the magnetic flux leakage of the coil is offset with the magnetic flux leakage through the induction of the set metal conductor, so that the influence of the magnetic flux leakage of the electronic product on other electronic products is reduced, and the effect of electromagnetic compatibility among the electronic products is improved.
In a specific embodiment, the metal conductor is fixed to the iron core. The metal conductor is convenient to fix.
When the iron core is in a columnar structure, the metal conductor is a flat plate type metal conductor.
In order to allow as much magnetic flux as possible to pass through the metal conductor, the distance between the metal conductor and the coil is less than 10mm when the metal conductor is disposed. Thereby ensuring that as many magnetic lines of force as possible pass through the metal conductor, and in a preferred embodiment, the distance between the metal conductor and the coil is preferably 2-5 mm.
In order to further improve the magnetic force lines passing through the metal conductor, preferably, the included angle between the metal conductor and the coil axis is between 60 ° and 90 °.
In order to improve the demagnetization effect, preferably, the metal conductor includes a multi-layered metal sheet structure. And demagnetizing by a magnetic field formed by each layer of metal sheet structure.
Furthermore, an electrical device is provided, comprising an inductor according to any of the above and/or a transformer according to any of the above.
In the technical scheme, the magnetic field of the magnetic flux leakage of the coil is offset with the magnetic flux leakage through the induction of the set metal conductor, so that the influence of the magnetic flux leakage of the electronic product on other electronic products is reduced, and the effect of electromagnetic compatibility among the electronic products is improved.
Drawings
FIG. 1 is a diagram illustrating the problem of electromagnetic compatibility of an electrical device according to the prior art;
fig. 2 is a schematic structural diagram of an inductor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an inductor according to another embodiment of the present invention;
FIG. 4 is a schematic diagram of Lenz's law provided by an embodiment of the present invention;
fig. 5 is a schematic diagram of an inductor according to an embodiment of the present invention;
FIG. 6a is a simulation diagram of magnetic induction of an inductor in the prior art;
fig. 6b is a simulation diagram of the magnetic induction intensity of the inductor according to the embodiment of the present invention;
FIG. 7a is a prior art graph of power conduction disturbance in an electrical installation using a prior art inductor;
fig. 7b is a diagram illustrating a power conduction disturbance test of an electrical device according to an embodiment of the present invention using an inductor according to an embodiment of the present invention.
Reference numerals:
10-iron core 20-coil 30-metal conductor
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In an embodiment of the present invention, in order to solve the problem of electromagnetic compatibility of an electronic product, the inductor or the transformer provided in this embodiment has a demagnetization structure according to lenz's law, so as to reduce electromagnetic interference generated in the electronic product. The inductor and the portion of the transformer generating the electromagnetic field are both coils, and in this embodiment, the inductor and the demagnetizing structure of the transformer are the same, and the demagnetizing structure of the inductor is first described below.
An embodiment of the present invention provides an inductor, including:
a coil;
and the metal conductor is electrically insulated from the coil and arranged at a position for cutting magnetic force lines of leakage flux of the coil, and the metal conductor induces and forms a magnetic field for inhibiting the magnetic flux leakage of the coil.
In the embodiment, the magnetic field for inhibiting the magnetic leakage of the coil is formed by induction of the arranged metal conductor and is offset with the magnetic leakage, so that the influence of the magnetic leakage of the electronic product on other electronic products is reduced, and the electromagnetic compatibility effect between the electronic products is improved.
In order to facilitate understanding of the inductor provided by the embodiments of the present invention, the following detailed description is made with reference to specific embodiments.
To facilitate understanding of the inductance provided by the embodiment of the present invention, the principle adopted in the embodiment is described in detail below, as shown in fig. 5, according to lenz's law, when an alternating current is applied to the inductance coil, the coil generates an alternating magnetic field H1, the alternating magnetic field H1 forms an eddy current on the metal conductor, and the eddy current generates an induced magnetic field H2, and H2 is opposite to the magnetic field H1 generated by the coil, so that the magnetic field radiation and coupling capability of the inductance coil are weakened.
According to the principle, in the embodiment, the magnetic field radiation of the coil can be effectively reduced through the arranged metal conductor, and the compatibility between electronic products is improved.
In a specific embodiment, as shown in fig. 2, the inductor further includes a core 10, the coil 20 is wound around the core 10, and the metal conductor 30 is fixed on the core 10. The coil 20 is supported by the iron core 10, and the metal conductor 30 is disposed on the iron core 10. In specific setting, the coil 20 is directly wound on the iron core 10, and the shape of the iron core 10 may be different, such as a columnar structure, and the coil 20 may be exposed outside the iron core 10 during winding, or the iron core 10 may be used to wrap the coil 20, as shown in fig. 2. Or the metal conductor 30 may have a perforated structure as shown in fig. 3, as the actual case requires. In actual production, different iron cores 10 can be selected according to needs.
In a specific arrangement, the metallic conductor 30 may be provided on a different component, and it is only necessary that the magnetic field lines of the alternating magnetic field emitted from the coil 20 can pass through the metallic conductor 30. As a preferred embodiment, the metal conductor 30 is fixed to the iron core 10, thereby facilitating the arrangement of the metal conductor 30. When the structure is adopted, the heat dissipation of the device and the heat dissipation of the system are not influenced; in particular, since the metal structure added by the scheme is generally a plane structure and is not a sealing structure, the heat dissipation performance of the device is not affected basically. Meanwhile, as the metal conductor 30 is arranged on the iron core 10, the original form of the magnetic device applying the scheme is basically unchanged, the heat dissipation of the system is not influenced, and the air duct is not obstructed. When the structure is adopted for demagnetization, the demagnetization structure is simple in structure and easy to process, and batch production can be realized; specifically, the method comprises the following steps: the scheme can be completed before the inductor leaves a factory, and the inductor is simple in structure and can realize batch production. As an integral inductor device, the production and processing links are not increased.
The metal conductor 30 is a frame-shaped metal conductor 30 or a flat plate-shaped metal conductor 30. Specifically, as shown in fig. 2, when the iron core 10 has a columnar structure, the metal conductor 30 is a flat plate-type metal conductor 30; as shown in fig. 3, when the core 10 has a zigzag structure, the metal conductor 30 is a frame-shaped metal conductor 30. No matter which structure is adopted for the metal conductor 30, the metal conductor 30 is a sheet structure, the metal conductor 30 can be made of different metals, for example, the metal conductor 30 structure can be made of materials with high electric conductivity such as copper foil, aluminum foil, etc., and the metal plane with small thickness of the metal conductor 30, in a preferred embodiment, the metal conductor 30 can be arranged in a multilayer structure, specifically, in order to improve the demagnetization effect, the metal conductor 30 comprises a multilayer laminated metal sheet structure. And demagnetizing by a magnetic field formed by each layer of metal sheet structure. When the induction coil is used, each metal sheet structure can generate an induction magnetic field, the direction of the induction magnetic field is opposite to that of the alternating magnetic field formed by the coil 20, and the alternating magnetic field is counteracted by the formed induction magnetic fields, so that the magnetic leakage is further reduced, and the magnetic field compatibility among electronic products is improved.
As a better embodiment, when the arrangement is specific, the included angle between the metal conductor 30 and the axis of the coil 20 is between 60 ° and 90 °. Thereby ensuring that more magnetic lines of force pass through the metal conductor 30 to generate eddy currents, increasing the strength of the induced electric field and further reducing the coupling effect of the magnetic field. Specifically, the included angle between the metal conductor 30 and the axis of the coil 20 (i.e., the included angle between the metal surface and the axis of the coil 20) may be any angle between 60 ° to 90 °, such as 60 °, 70 °, 80 °, 90 °, and the like. Preferably, the surface direction of the metal conductor 30 and the direction of the magnetic force line of the leakage magnetic flux can be perpendicular as much as possible, and the metal conductor is close to the device, can be tightly attached, and can inhibit the radiation/coupling of the magnetic device to the greatest extent; referring to fig. 4, it can be seen that the magnetic lines of force of the magnetic field generated by the coil 20 are outside the coil 20, emitted from one end of the coil 20, and received at the other end, and the magnetic lines of force located at the end of the coil 20 are the most dense, so that when the surface of the metal conductor 30 is perpendicular to the axis of the coil 20, more magnetic lines of force can pass through the metal conductor 30 to form eddy currents to increase the strength of the induced magnetic field.
Further, as can be seen from fig. 4, in order to make more magnetic lines pass through the metal conductor 30, the distance between the metal conductor 30 and the end of the coil 20 is preferably smaller, and as a specific embodiment, the distance between the metal conductor 30 and the coil 20 is less than 10 mm. It should be understood that the metal conductor 30 is insulated from the coil 20, and therefore the minimum distance between the two is greater than 0, avoiding contact between the metal conductor 30 and the coil 20. In a preferred embodiment, the distance between the metal conductor 30 and the coil 20 is 2-5 mm. Such as 2mm, 3mm, 4mm, 5mm, and the like, which is arbitrarily within a range of 2 to 5 mm.
For the convenience of understanding the demagnetizing effect of the inductor provided in this embodiment, it is described in detail below with reference to simulation experiments.
As shown in fig. 6a and fig. 6b, fig. 6a is a simulation of magnetic induction intensity 10mm above a power inductor without a degaussing structure in the prior art. Fig. 6b is a simulation of magnetic induction intensity 10mm above the power inductor provided in this embodiment. The simulation adopts Maxwell software based simulation cloud charts aiming at the magnetic induction intensity amplitude of a projection plane 10mm above the power inductor before and after the scheme of the invention is applied. The cloud chart is 15-level color gradation, the magnetic induction is gradually increased by 5.31 times from blue to red, the blue indicates that the magnetic induction is 2.6006E-05T (T: Tesla), and the red indicates that the magnetic induction is 1.3810E-04T.
To further illustrate the degaussing effect of the inductor provided in this embodiment, as shown in fig. 7a and 7b, fig. 7a is a practical diagram of an inductor without degaussing effect in the prior art, and fig. 7b is a practical diagram of an inductor provided in this embodiment of the present invention. The test is a conducted noise spectrogram of a power port of certain equipment, and the test method and test arrangement refer to EN 55022: 20109.5 section. The spectrogram has two limit lines and two spectrum curves. Wherein the limit line is EN 55022: 20105.1, power port CLASS B limit lines, classified as Quasi-peak Limits and Average Limits. The two spectrum curves are respectively the noise spectra of the power port corresponding to two different detection modes (average detector and peak detector). As can be seen from a comparison between fig. 7a and fig. 7b, the inductor provided by the present embodiment has a good demagnetization effect.
It can be seen from the above description that the inductor provided by this embodiment has a good demagnetization effect after adopting the demagnetization structure, and when adopting the above structure, it is not necessary to increase the distance between the power supply and the power inductor, and it is also not necessary to shield and isolate the metal structure. The PCB layout area is increased zero, and the cost increase is lower. In a specific embodiment, the power conduction disturbance test exceeds the limit line due to the coupling of a certain power module and the lightning protection power inductance near-field magnetic field, and after the technical scheme is applied, the data of the power conduction disturbance test is reduced by 6dB, so that the test result is ensured to meet the requirement of the limit line.
When the demagnetization structure is adopted, because the metal conductor 30 arranged on the iron core 10 is adopted for demagnetization, and a metal structure (such as copper foil) with small area is usually added on a certain specific surface which is vertical to the magnetic force line of the leakage flux on the inductance, the cost is very low; and the reason is: because the added metal structure is generally a plane structure, the thickness is generally not more than 1mm, the PCB layout area can be basically not influenced, the original form and the size of the magnetic device are slightly changed, and the influence on the whole equipment can be ignored.
The present embodiment also provides a transformer, including:
iron core:
a coil wound around the core;
and the metal conductor is electrically insulated from the coil and arranged at a position for cutting magnetic force lines of leakage flux of the coil, and the metal conductor induces and forms a magnetic field for inhibiting the magnetic flux leakage of the coil.
In the above embodiment, the transformer also has a coil for generating leakage flux, and the demagnetizing is performed by using a metal conductor, and the structure and principle thereof are similar to those of the inductor provided in this embodiment, and will not be described in detail here.
In a specific limitation, the shape, arrangement and distance from the coil of the metal conductor are the same as those of the metal conductor in the inductor provided by the present embodiment, that is: the metal conductor is fixed on the iron core. And the metal conductor is a frame-shaped metal conductor or a flat-plate-shaped metal conductor. In a particular arrangement, the distance between the metal conductor and the coil is less than 10 mm. As a preferred embodiment, the distance between the metal conductor and the coil is 2-5 mm. Preferably, an included angle between the metal conductor and the magnetic line of the leakage magnetic flux is between 60 and 90 degrees. As can be seen from the above limitations, the shape and the arrangement manner of the metal conductor of the transformer provided in this embodiment are the same as those of the inductor provided in this embodiment, and detailed description thereof is omitted.
In addition, the present embodiment further provides an electrical device, which includes the inductor and the transformer.
Specifically, the electrical equipment comprises a switching power supply, a filter circuit connected with the switching power supply and a receiver connected with a filter, wherein a transformer is arranged in the switching power supply, and a power inductor is arranged in the receiver. At least one of the transformer and the power inductor is provided with a metal conductor for demagnetization, so that the coupling condition between the switching power supply and the receiver is avoided when the electrical equipment is used, and the using effect of the electrical equipment is improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (11)
1. An inductor, comprising:
a coil;
the metal conductor is electrically insulated from the coil and is arranged at a position for cutting magnetic lines of leakage flux of the coil, and the metal conductor induces and forms a magnetic field for inhibiting the magnetic leakage of the coil; wherein,
the metal conductor comprises a multilayer laminated metal sheet structure;
the included angle between the plane of the metal conductor and the axis of the coil is between 60 degrees and 90 degrees.
2. The inductor as claimed in claim 1, further comprising a core, wherein the coil is wound around the core, and wherein the metal conductor is fixed to the core.
3. The inductor of claim 2, wherein the metal conductor is a frame-shaped metal conductor or a plate-shaped metal conductor.
4. The inductor according to claim 1, wherein the distance between the metal conductor and the coil is less than 10 mm.
5. The inductor according to claim 4, wherein the distance between the metal conductor and the coil is 2-5 mm.
6. A transformer, comprising:
iron core:
a coil wound around the core;
the metal conductor is electrically insulated from the coil and is arranged at a position for cutting magnetic lines of leakage flux of the coil, and the metal conductor induces and forms a magnetic field for inhibiting the magnetic leakage of the coil; wherein,
the metal conductor comprises a multilayer laminated metal sheet structure;
the included angle between the plane of the metal conductor and the axis of the coil is between 60 degrees and 90 degrees.
7. The transformer of claim 6, wherein the metal conductor is secured to the core.
8. The transformer of claim 7, wherein the metal conductor is a frame-shaped metal conductor or a flat-plate-shaped metal conductor.
9. The transformer of claim 6, wherein a distance between the metal conductor and the coil is less than 10 mm.
10. The transformer of claim 9, wherein the distance between the metal conductor and the coil is between 2 and 5 mm.
11. An electrical apparatus comprising an inductor according to any one of claims 1 to 5 and/or a transformer according to any one of claims 6 to 10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610091031.1A CN107093515B (en) | 2016-02-18 | 2016-02-18 | A kind of inductance, transformer and electrical equipment |
| PCT/CN2016/092894 WO2017140094A1 (en) | 2016-02-18 | 2016-08-02 | Inductor, transformer and electrical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610091031.1A CN107093515B (en) | 2016-02-18 | 2016-02-18 | A kind of inductance, transformer and electrical equipment |
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| Publication Number | Publication Date |
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| CN107093515A CN107093515A (en) | 2017-08-25 |
| CN107093515B true CN107093515B (en) | 2019-10-25 |
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| CN201610091031.1A Active CN107093515B (en) | 2016-02-18 | 2016-02-18 | A kind of inductance, transformer and electrical equipment |
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| CN (1) | CN107093515B (en) |
| WO (1) | WO2017140094A1 (en) |
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| CN113270931A (en) * | 2021-05-31 | 2021-08-17 | 赛尔康技术（深圳）有限公司 | Charger circuit and charger |
| CN116078861B (en) * | 2023-02-22 | 2024-02-02 | 江苏甬金金属科技有限公司 | Steel belt flattening device for preventing edge deformation of steel belt |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0256583A1 (en) * | 1986-08-16 | 1988-02-24 | Philips Patentverwaltung GmbH | Transformer with a magnetic shield |
| JP2002043141A (en) * | 2000-07-24 | 2002-02-08 | Sanken Electric Co Ltd | Transformer for switching power |
| JP4337312B2 (en) * | 2002-07-24 | 2009-09-30 | 株式会社村田製作所 | Low profile winding coil |
| JP2007142081A (en) * | 2005-11-17 | 2007-06-07 | Yonezawa Densen Kk | Transmission coil, contactless charger, contactless rechargeable equipment, manufacturing method of transmission coil and contactless power transmission system |
| US7561008B2 (en) * | 2006-10-31 | 2009-07-14 | Azure Dynamics, Inc. | Filter package |
| CN101826390A (en) * | 2009-03-06 | 2010-09-08 | 乐金电子(天津)电器有限公司 | Structure of microwave oven transformer |
| US8519665B2 (en) * | 2009-12-04 | 2013-08-27 | International Business Machines Corporation | Adjustable EMI suppression core for common mode/normal mode balance |
| JP2012227390A (en) * | 2011-04-20 | 2012-11-15 | Toyota Motor Corp | Shield material |
| CN202307410U (en) * | 2011-09-26 | 2012-07-04 | 武汉晨扬电子科技有限公司 | Power factor correction (PFC) inductor for energy-saving power supply |
| CN202434319U (en) * | 2011-12-30 | 2012-09-12 | 南京思立科电子有限公司 | Magnetic shielding device of planar transformer |
| CN202695094U (en) * | 2012-05-25 | 2013-01-23 | 珠海华铖电子科技有限公司 | Inductor |
| JP6124085B2 (en) * | 2012-07-05 | 2017-05-10 | パナソニックＩｐマネジメント株式会社 | Wireless power transmission device, wireless power transmission device and power reception device |
| CN204668122U (en) * | 2015-06-02 | 2015-09-23 | 胜美达电机（香港）有限公司 | Inductor |
| CN204732254U (en) * | 2015-06-06 | 2015-10-28 | 江西力磁电子有限公司 | One cools high frequency transformer by force |
-
2016
- 2016-02-18 CN CN201610091031.1A patent/CN107093515B/en active Active
- 2016-08-02 WO PCT/CN2016/092894 patent/WO2017140094A1/en active Application Filing
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| CN107093515A (en) | 2017-08-25 |
| WO2017140094A1 (en) | 2017-08-24 |
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