CN202363214U - Magnetic core for transformer - Google Patents
Magnetic core for transformer Download PDFInfo
- Publication number
- CN202363214U CN202363214U CN2011203514969U CN201120351496U CN202363214U CN 202363214 U CN202363214 U CN 202363214U CN 2011203514969 U CN2011203514969 U CN 2011203514969U CN 201120351496 U CN201120351496 U CN 201120351496U CN 202363214 U CN202363214 U CN 202363214U
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- magnetic core
- transformer
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- core
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Abstract
The utility model discloses a magnetic core for a transformer. The magnetic core includes two mutually butted E-shaped magnetic cores (1) and (1'), and the two E-shaped magnetic cores are formed by grinding off parts of the two side legs and the central posts of common E-shaped magnetic cores through grinding to form certain depth. Magnetized rectangular permanent magnetism ferrite sheets (2), (3), and (4) are respectively arranged between the joint surfaces of the two butted E-shaped magnetic cores, namely, between the inner sides of the two side legs and between the central posts, wherein the magnetized rectangular permanent magnetism ferrite sheets (2) and (4) are same in the magnetic polarity direction and are opposite to the magnetic polarity direction of the magnetized rectangular permanent magnetism ferrite sheet (3). The magnetic core can greatly improve the direct current superpose characteristics of the transformer to enable the transformer to allow higher direct current to pass through; meanwhile, the magnetic core can greatly reduce the leakage induction and the power loss of the transformer, and reduces the temperature rise of the transformer and the electromagnetic interference to surrounding electronic components.
Description
Technical field
The utility model relates to a kind of magnetic core, relates in particular to a kind of magnetic core for transformer.
Background technology
At present, generally use the transformer that has magnetic core in the high-frequency circuit, along with the develop rapidly of electronic technology; Require electronic devices and components constantly to develop to miniaturization and high power direction; In order to satisfy this growth requirement, the direct current that requires transformer to allow to pass through is increasing, and the excessive decline significantly that tends to cause the Transformer Winding inductance of direct current; Thereby transformer efficiency is descended significantly, even can't operate as normal.For preventing the generation of magnetic saturation phenomenon; Must improve the dc superposition characteristic of transformer magnetic core; Traditional method is in the magnetic circuit of magnetic core, to open one section air gap, although this method can be improved the dc superposition characteristic of transformer to a certain extent, improved degree is very limited.For being operated in transformer with big direct-current component, can't adopt this method, because; Air gap in the magnetic core magnetic circuit, can not open too much, otherwise; Inductance is very low, and leakage field is very big, to around other electronic devices and components can produce certain electromagnetic and disturb.
Summary of the invention
The utility model technical problem to be solved is the deficiency that overcomes prior art, provides a kind of electronic circuit that can be applied to have than big direct-current component to use the transformer magnetic core.
The technical scheme that the utility model adopted is: the utility model comprises 2 E shape magnetic core (1) and (1 ') of butt joint each other; These 2 E shape magnetic cores are that 2 limit inboard legs of common E shape magnetic core and newel are ground off a part through overground processing; Forming certain degree of depth (also can be through 2 times or repeatedly grinding; The stock removal of opposite side inboard leg and newel is different, thereby the degree of depth that forms is different), the degree of depth of limit inboard leg and newel also can just form when the compression molding of magnetic core blank.Between the faying face of the E of 2 butt joints shape magnetic core; Promptly respectively put rectangular-shaped permanent-magnet ferrite sheet (2), (3), (4) of having magnetized between the inboard of 2 limit legs and between the newel; Wherein, the polarity of the magnetic field direction of (2), (4) is identical, with the opposite polarity directions of (3); These 3 permanent-magnet ferrite sheets are consistent at the inner magnetic direction that is produced of magnetic core, and (being wound on the newel) magnetic direction that direct current produced is opposite in the magnetic direction and Transformer Winding that it produced.
Above-mentioned E shape magnetic core (1) and (1 '); Also can be that a newel with common E shape magnetic core grinds off a part through overground processing; Form certain degree of depth (degree of depth of newel also can just form) when the compression molding of magnetic core blank; Then between the faying face of the E of 2 butt joints shape magnetic core, promptly between 2 limit legs and respectively put rectangular-shaped permanent-magnet ferrite sheet (2), (3), (4) of having magnetized between the newel.
Above-mentioned E shape magnetic core (1) is identical with (1 ') profile, and length and thickness are identical, but width can be different, and the material of 2 magnetic cores can be identical, also can be different fully; This magnetic core both can be the sintering magnetic core through oversintering, also can be the magnetic powder core that is formed by the soft magnetism pressed by powder; Can also the identical E shape magnetic sheet of shape bonds together by the material difference.Unlike material comprises: soft magnetic ferrites, metal or metal alloy (comprising amorphous nano-crystalline) soft magnetic material and organic soft magnetic material etc.
The beneficial effect of the utility model is: because these 3 permanent-magnet ferrite sheets magnetic direction that direct current produced in inner magnetic direction that is produced of two E shape magnetic cores of butt joint and Transformer Winding is opposite; Therefore; Some is offset the D.C. magnetic field that direct current produced in the Transformer Winding by the magnetic field that the permanent-magnet ferrite sheet is produced, thereby can make in the Transformer Winding through bigger direct current.Through the inventive method, can improve the dc superposition characteristic of transformer greatly, transformer can be allowed through bigger direct current.Another useful effect is: the permanent-magnet ferrite sheet is placed on respectively between 2 E shape magnetic core limit inboard legs and the newel; With being concentrated between the centre post, the permanent-magnet ferrite sheet compares; Except that the leakage inductance that can significantly reduce transformer; Can also reduce the power loss of transformer greatly, reduce the temperature rise of transformer.In addition, because the limit leg (11), (12) of 2 E shape magnetic cores of butt joint just have the space between the inboard leg of limit, and the outside can combine closely, and the leakage inductance that externally produces is very little, can reduce greatly the electromagnetic interference of electronic devices and components on every side.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Fig. 1 is E shape magnetic core (a 1) sketch map, and this magnetic core is that 2 limit inboard legs of common E shape magnetic core and newel are ground off a part through overground processing, thereby forms certain degree of depth.
After Fig. 2 is E shape magnetic core (1) and E shape magnetic core (1 ') butt joint, along length and Width generalized section.Between the faying face of the E of 2 butt joints shape magnetic core; Promptly between the inboard of 2 limit legs and between the newel, respectively put rectangular-shaped permanent-magnet ferrite sheet (2), (3), (4) of having magnetized, wherein; (2), the polarity of the magnetic field direction of (4) is identical, with the opposite polarity directions of (3).
Embodiment
2 E shape magnetic cores (1) and (1 ') are docking together each other; These 2 E shape magnetic cores are that 2 limit inboard legs of common E shape magnetic core and newel are ground off a part through overground processing; Forming certain degree of depth (also can be through 2 times or repeatedly grinding; The stock removal of opposite side inboard leg and newel is different, thereby the degree of depth that forms is different), the degree of depth of limit inboard leg and newel also can just form when the compression molding of magnetic core blank; Between the faying face of the E of 2 butt joints shape magnetic core; Promptly respectively put rectangular-shaped permanent-magnet ferrite sheet (2), (3), (4) of having magnetized between the inboard of 2 limit legs and between the newel; Wherein, the polarity of the magnetic field direction of (2), (4) is identical, with the opposite polarity directions of (3); These 3 permanent-magnet ferrite sheets are consistent at the inner magnetic direction that is produced of magnetic core, and (being wound on the newel) magnetic direction that direct current produced is opposite in the magnetic direction and Transformer Winding that it produced.
Above-mentioned E shape magnetic core (1) and (1 '); Also can be that a newel with common E shape magnetic core grinds off a part through overground processing; Form certain degree of depth (degree of depth of newel also can just form) when the compression molding of magnetic core blank; Then between the faying face of the E of 2 butt joints shape magnetic core, promptly between 2 limit legs and respectively put rectangular-shaped permanent-magnet ferrite sheet (2), (3), (4) of having magnetized between the newel.
E shape magnetic core (1) is identical with (1 ') profile, and length and thickness are identical, but width can be different, and the material of 2 magnetic cores can be identical, also can be different fully; This magnetic core both can be the sintering magnetic core through oversintering, also can be the magnetic powder core that is formed by the soft magnetism pressed by powder; Can also the identical E shape magnetic sheet of shape bonds together by the material difference.Unlike material comprises: soft magnetic ferrites, metal or metal alloy (comprising amorphous nano-crystalline) soft magnetic material and organic soft magnetic material etc.
Because these 3 permanent-magnet ferrite sheets magnetic direction that direct current produced in inner magnetic direction that is produced of two E shape magnetic cores of butt joint and Transformer Winding is opposite; Therefore; Some is offset the D.C. magnetic field that direct current produced in the Transformer Winding by the magnetic field that the permanent-magnet ferrite sheet is produced, thereby can make in the Transformer Winding through bigger direct current.Through the inventive method, can improve the dc superposition characteristic of transformer greatly, transformer can be allowed through bigger direct current.Another useful effect is: the permanent-magnet ferrite sheet is placed on respectively between 2 E shape magnetic core limit inboard legs and the newel; With being concentrated between the centre post, the permanent-magnet ferrite sheet compares; Except that the leakage inductance that can significantly reduce transformer; Can also reduce the power loss of transformer greatly, reduce the temperature rise of transformer.In addition, because the limit leg (11), (12) of 2 E shape magnetic cores of butt joint just have the space between the inboard, and the outside can combine closely, and the leakage inductance that externally produces is very little, can reduce greatly the electromagnetic interference of electronic devices and components on every side.
Claims (3)
1. magnetic core for transformer; It is characterized in that: comprise 2 E shape magnetic core (1) and (1 ') of butt joint each other; Respectively have rectangular-shaped permanent-magnet ferrite sheet (2), (3), (4) of having magnetized between the limit inboard leg of the E shape magnetic core that docks and between the newel; Wherein, the polarity of the magnetic field direction of (2), (4) is identical, with the opposite polarity directions of (3); These 3 permanent-magnet ferrite sheets are consistent at the inner magnetic direction that is produced of magnetic core, and the magnetic direction that it produced is opposite with being wound on the magnetic direction that direct current produced in the winding on the newel.
2. according to the said a kind of magnetic core for transformer of claim 1, it is characterized in that: the E shape magnetic core (1) of butt joint is identical with (1 ') profile each other, and length and thickness are identical, but width is identical or different.
3. according to the said a kind of magnetic core for transformer of claim 1, it is characterized in that: each other E shape magnetic core (1) and (1 ') of butt joint are the sintering magnetic cores through oversintering, or the magnetic powder core that is formed by the soft magnetism pressed by powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203514969U CN202363214U (en) | 2011-09-16 | 2011-09-16 | Magnetic core for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203514969U CN202363214U (en) | 2011-09-16 | 2011-09-16 | Magnetic core for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202363214U true CN202363214U (en) | 2012-08-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203514969U Expired - Fee Related CN202363214U (en) | 2011-09-16 | 2011-09-16 | Magnetic core for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202363214U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368421A (en) * | 2011-09-16 | 2012-03-07 | 陆明岳 | Magnetic core for transformer |
| WO2015184793A1 (en) * | 2014-04-25 | 2015-12-10 | 李孝龙 | Permanent magnet power-increasing transformer |
-
2011
- 2011-09-16 CN CN2011203514969U patent/CN202363214U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368421A (en) * | 2011-09-16 | 2012-03-07 | 陆明岳 | Magnetic core for transformer |
| WO2015184793A1 (en) * | 2014-04-25 | 2015-12-10 | 李孝龙 | Permanent magnet power-increasing transformer |
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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 |
Granted publication date: 20120801 Termination date: 20140916 |
|
| EXPY | Termination of patent right or utility model |