CN202422910U - Common-mode inductor for magnetic shielding patch - Google Patents
Common-mode inductor for magnetic shielding patch Download PDFInfo
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- CN202422910U CN202422910U CN2012200290208U CN201220029020U CN202422910U CN 202422910 U CN202422910 U CN 202422910U CN 2012200290208 U CN2012200290208 U CN 2012200290208U CN 201220029020 U CN201220029020 U CN 201220029020U CN 202422910 U CN202422910 U CN 202422910U
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Abstract
The utility model discloses a common-mode inductor for a magnetic shielding patch, which comprises an I-shaped magnetic core (1), enameled round copper wires (2), a magnetic powder shielding layer (3), and terminals (4), wherein two high-strength polyurethane enameled round copper wires (2) are tightly wound in a groove of the I-shaped magnetic core (1); four leading wires of the enameled round copper wires (2) are respectively welded onto the four terminals (4); magnetic powder is pressed and cast at the peripheries of both the I-shaped magnetic core (1) and the enameled round copper wires (2) to form the magnetic powder shielding layer (3); and the four terminals (4) are exposed out of the magnetic powder shielding layer (3). Through the above structure, the common-mode inductor is formed. According to the utility model, the I-shaped magnetic core is adopted, the inductor positioning is accurate in pressure casting, the consistency is good, the mechanical property and electromagnetic property are stable and reliable, the degree of automation is high, batch production is convenient, the magnetic shielding effect is good, magnetic leakage of the common-mode inductor is reduced to the utmost, and the dissemination of EMI (Electromagnetic Interference) is effectively suppressed.
Description
Technical field
The utility model relates to inductance, is specifically related to a kind of magnetic screen paster common mode inductance.
Background technology
In recent years, computer, various server, telecommunication product and other electronic instrument develop towards light, thin, short, little and multi-functional, high-performance and the low direction of cost, require power supply to trend towards high frequency, big electric current, low-voltage.Particularly all be the power circuit of the CPU of high speed, big flow basically in the power supply of notebook computer, digital electronic product and various server products, electric current has reached sixties amperes.
Present common mode inductance generally is to adopt different materials such as soft magnetic ferrites, ferrocart core, iron nickel molybdenum, iron sial; On same magnetic core by around constituting to two opposite, that the number of turn is identical windings; After making the filter place in circuit, the magnetic flux of two interior electric current generations of coil is cancelled out each other in magnetic core, does not make magnetic core reach the magnetic saturation state as far as possible; Can handle between two groups of coils peak stream does not have saturated restriction, thereby the inductance value of two coils is remained unchanged.But the common mode inductance in market is through big electric current the time, if the problem that magnetic circuit has air gap will bring effective permeability to descend is prone to cause electromagnetic radiation, local magnetic loss to increase.If the use toroidal core, the little radioresistance of leakage field, bearing great current efficient is high; But the coiling difficulty, and the material of magnet ring can not be accomplished definitely evenly the also impossible symmetry fully of the coiling of two coils etc.; Very easily cause the inductance value of two windings unequal, form differential mode inductance.Secondly, it is big to take up room in the line, can't satisfy production development direction small-sized, sheetization.
The outer die casting magnetic paster common mode inductance of inductance is to innovate one of inductance element both at home and abroad in recent years.Be the common mode inductance that carries out die cast with above-mentioned magnetic equally, but it has overcome the deficiency of above-mentioned function of use effectively, and adapted to very much of the requirement of present electronic product common mode inductance.Along with the raising with production capacity of improving of technical equipment, will replace that inductance value is identical, the frequency characteristic common mode inductance of plug-in type considerably, and have the fast development of force urges high frequency, big electric current, low-voltage, microminiaturized direction electronic product.
Present circuit engineering has developed into the DC-DC converter and has made multinomial power technology, realizes high frequencyization and big electric current.Gently, thin, little, multi-functional and high-performance is the main flow of information-intensive society electronic product development.Therefore, in Passively compensated filtering technique, suppressing conducted interference with common-mode inductor is a kind of good way.Connect common mode inductance filtering at power input, promptly can suppress to produce and to the interference of electrical network or miscellaneous equipment feedback, also can suppress from the infringement of the noise of electrical network to power supply and various device itself because of power supply.The comparatively simple electromagnetic interface filter of (LC) circuit or network configuration just can reach desirable filter effect as long as select to decouple accordingly.
Summary of the invention
The purpose of the utility model is: a kind of magnetic screen paster common mode inductance is provided, realizes the random magnetic of shielding prevention, mechanical strength is high, and electromagnetic performance is good, and the anti-saturation ability is strong.
To achieve these goals; The technical solution of the utility model is: this common mode inductance comprises I-shaped magnetic core, enamel insulated round copper wire, magnetic screen and terminal; Two high-strength polyurethane enamel insulated round copper wire closely are wound in the groove of I-shaped magnetic core, and four lead-out wires of enamel insulated round copper wire are welded on respectively on four terminals, at the peripheral die casting magnetic formation magnetic screen of I-shaped magnetic core, enamel insulated round copper wire; Four terminals are exposed to the magnetic screen, and integral body is common mode inductance.
The utility model adopts I-shaped magnetic core, inductance accurate positioning during die casting, high conformity; Mechanical performance and electromagnetic performance are reliable and stable, and automaticity is high, is convenient to mass production; Magnetic Shielding Effectiveness is good, reduces the common mode inductance leakage field to a great extent, has effectively suppressed the propagation of EMI.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: 1 I-shaped magnetic core, 2 enamel insulated round copper wire, 3 magnetic screens, 4 terminals.
Embodiment
As shown in Figure 1; This common mode inductance comprises I-shaped magnetic core 1, enamel insulated round copper wire 2, magnetic screen 3 and terminal 4; Two high-strength polyurethane enamel insulated round copper wire 2 closely are wound in the groove of I-shaped magnetic core 1, and four lead-out wires of enamel insulated round copper wire 2 are welded on respectively on four terminals 4, form magnetic screen 3 at the peripheral die casting magnetic of I-shaped magnetic core 1, enamel insulated round copper wire 2; Four terminals 4 are exposed to magnetic screen 3, and integral body is common mode inductance.
Claims (1)
1. magnetic screen paster common mode inductance; It is characterized in that: this common mode inductance comprises I-shaped magnetic core (1), enamel insulated round copper wire (2), magnetic screen (3) and terminal (4); Two high-strength polyurethane enamel insulated round copper wire (2) closely are wound in the groove of I-shaped magnetic core (1); Four lead-out wires of enamel insulated round copper wire (2) are welded on respectively on four terminals (4); Peripheral die casting magnetic at I-shaped magnetic core (1), enamel insulated round copper wire (2) forms magnetic screen (3), and four terminals (4) are exposed to magnetic screen (3), and integral body is common mode inductance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200290208U CN202422910U (en) | 2012-01-30 | 2012-01-30 | Common-mode inductor for magnetic shielding patch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200290208U CN202422910U (en) | 2012-01-30 | 2012-01-30 | Common-mode inductor for magnetic shielding patch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202422910U true CN202422910U (en) | 2012-09-05 |
Family
ID=46747646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200290208U Expired - Fee Related CN202422910U (en) | 2012-01-30 | 2012-01-30 | Common-mode inductor for magnetic shielding patch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202422910U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914000A (en) * | 2014-12-05 | 2016-08-31 | 海宁联丰东进电子有限公司 | Power filter |
-
2012
- 2012-01-30 CN CN2012200290208U patent/CN202422910U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914000A (en) * | 2014-12-05 | 2016-08-31 | 海宁联丰东进电子有限公司 | Power filter |
| CN105914001A (en) * | 2014-12-05 | 2016-08-31 | 海宁联丰东进电子有限公司 | UC-type power filter improved structure |
| CN105914001B (en) * | 2014-12-05 | 2017-09-08 | 海宁联丰东进电子有限公司 | A kind of UC types power-supply filter structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20190130 |