CN201601015U - Large-current mini mutual inductor meeting basic insulation - Google Patents
Large-current mini mutual inductor meeting basic insulation Download PDFInfo
- Publication number
- CN201601015U CN201601015U CN2009202428460U CN200920242846U CN201601015U CN 201601015 U CN201601015 U CN 201601015U CN 2009202428460 U CN2009202428460 U CN 2009202428460U CN 200920242846 U CN200920242846 U CN 200920242846U CN 201601015 U CN201601015 U CN 201601015U
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- copper sheet
- magnetic core
- pin
- skeleton
- mutual inductor
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Abstract
The utility model discloses a large-current mini mutual inductor meeting basic insulation and relates to mutual inductors, which comprises a frame, an E-shaped magnetic core surrounding the frame, a primary winding copper sheet, a secondary winding coil and a pin. The frame is used for mounting a square groove of the magnetic core, no retaining wall is arranged between the frame and the inner side of a magnetic core frame, the portion, with the pin, of the frame integrally extends away from the right side of the pin, the primary winding copper sheet is inwardly embedded inside the frame, a copper sheet pin is led out from the right side end face of the primary winding copper sheet and inversely bent downwards to be tightly attached to the lower surface of the primary winding copper sheet, the shortest distances between the copper sheet pin and the magnetic core and between the copper sheet pin and the secondary winding coil are larger than 1.4mm, and the lower surface of the E-shaped magnetic core is the bottommost face of the mutual inductor. The mutual inductor meets basic insulation, is capable of sampling large current of at least 6A, has higher safety and stability, and super short height, and fills the gap of lack of like inductors in existing module power supply field.
Description
Technical field
The utility model relates to a kind of instrument transformer, relates in particular to a kind of heavy-current micro mutual inductor of satisfying basic insulation.
Background technology
Along with people to the more and more stronger demand of miniaturization of electronic products, multifunction, the microminiaturization of electronic product and integrated be the inexorable trend of technical development, wherein circuit is because the development of integrated circuit technique substantially no longer restricts the microminiaturization of electronic product, and the microminiaturization of the electronic component on the circuit then becomes the key of electronic product microminiaturization.As using instrument transformer very widely in the electronic product, it also needs the micro mutual inductor highly lower, that area occupied is littler to adapt to the development of society, technology.And in microminiaturization, guarantee on its function basis just its fail safe, stability further to be improved, the functional insulation safety requires to satisfy, the basic insulation safety requires and even the requirement of reinforced insulation safety, and the research and development design of micro mutual inductor is had higher requirement.Current transformer performance superior, very the more important is the size of its sample rate current ability, and is a pair of contradiction between sample rate current and the product size, often will accomplish bigger sample rate current, its product size also increases thereupon.In addition, in the application of product, current great current mutual inductor generally is applied in the circuit homonymy in the DC-DC module, to not having insulation request substantially between the sampling end of instrument transformer and the output.And in case need to adopt when the structure of basic insulation is arranged, otherwise size can be little, but sampling current is also smaller, do not break through 3A, otherwise sampling current is big, but does not meet basic insulation, if it is should sampling current big, meet basic insulation again, the volume of that product can be very big, and height will be higher than 2.7mm far away.In disclosed technology and product, do not find big electric current, small size micro instrument transformer that the satisfying basic insulation safety requires as yet.
The utility model content
Problem at above-mentioned prior art existence, the utility model purpose is to provide a kind of heavy-current micro mutual inductor of satisfying basic insulation, its fail safe, stability are higher, and highly super short, have filled up the blank that present modular power source field lacks this type of instrument transformer.
The technical solution of the utility model is: a kind of heavy-current micro mutual inductor of satisfying basic insulation, comprise skeleton, E shape magnetic core around skeleton, elementary winding copper sheet, secondary winding coil and pin, described skeleton is used to install between the square annular groove of magnetic core and the magnetic core frame inboard does not have barricade, the left side that described skeleton is positioned at secondary winding coil below part is provided with described pin, its other end is respectively before this skeleton part, the rear side end face is drawn and is oppositely bent downwards and is close to this skeleton part lower surface, this skeleton part one is to the right extended, elementary winding copper sheet is embedded in it, elementary winding copper sheet pin is drawn and is oppositely bent downwards from its its right end face and is close to its lower surface, all greater than 1.4mm, the lower surface of described E shape magnetic core is the bottom surface of instrument transformer to this copper sheet pin to the beeline of E shape magnetic core and secondary winding coil.
As preferably, described pin is concordant with the lower surface of described E shape magnetic core with the lower surface that elementary winding copper sheet pin is positioned at skeleton below part.
Further, the termination end face of described elementary winding copper sheet pin is 1.7mm to the beeline of E shape magnetic core.
As preferably, described elementary winding copper sheet pin is 1.9mm to the beeline of secondary winding coil.
As preferably, described skeleton height is less than 2.5mm.
The beneficial effects of the utility model are: at first, skeleton is used to install between the square annular groove of magnetic core and the magnetic core frame inboard does not have barricade, and in conjunction with unique skeleton, pin, the distribution of copper sheet, the master-plan of structure, therefore this product just can be accomplished the skeleton height of 2.4mm, the so short size of finished product height of 2.7mm; In addition, current transformer performance superior, very the more important is the size of its sample rate current ability.And the size of sampling current is mainly by the heat-sinking capability decision of the resistance of product and product structure.The utility model is imbedded skeleton with elementary winding copper sheet, its resistance has only about 1.3m Ω, in 6A, loss on the elementary winding copper sheet is P=12*R=46.8mW, simultaneously, the lower surface of E shape magnetic core of the present utility model is the bottom surface of instrument transformer, makes magnetic core can contact welding PCB or aluminium base, and generate heat can be by the magnetic core part that sheds for the integral body of product like this.So many on the market instrument transformers of comparing, this kind structure can be descended bigger electric current at littler volume; They are three years old, the utility model is imbedded skeleton with elementary winding copper sheet, magnetic core is put into secondary, like this, elementary winding copper sheet is because last, down, a left side, the right side all is capped insulation, therefore magnetic core can only be seen the distance of magnetic core to the exposed pin of copper sheet to elementary creepage distance, and the utility model is somebody's turn to do from being 1.7mm---greater than 1.4mm, secondary to elementary creepage distance also be the secondary winding coil to exposed copper sheet pin outside according to rate, and the utility model is somebody's turn to do from being 1.9mm---greater than 1.4mm, equal 1.3～1.4mm distances that requires greater than the basic insulation safety, so this product meets the design of basic insulation.In sum, unique skeleton structure is the height of product, big electric current, and these three key elements of basic insulation combine, and have finally formed the big electric current, the small size micro instrument transformer that meet the basic insulation design.
Description of drawings
Fig. 1 to Fig. 5 is the structural representation (picture in picture 1 is front view, and Fig. 2 is a vertical view, and Fig. 3 is a upward view, and Fig. 4 is a right view, and Fig. 5 is a left view) of the skeleton of the utility model embodiment;
Fig. 6 to Fig. 8 is the structural representation (picture in picture 6 is front view, and Fig. 7 is a upward view, and Fig. 8 is a left view) of the utility model embodiment.
Embodiment
As a kind of execution mode of the present utility model, extremely shown in Figure 8 as Fig. 1, a kind of heavy-current micro mutual inductor of satisfying basic insulation, comprise skeleton 1, E shape magnetic core 5 around skeleton 1, elementary winding copper sheet 2, secondary winding coil 3 and pin 4, described skeleton 1 is used to install between the square annular groove 11 of magnetic core 5 and the magnetic core 5 frame inboards does not have barricade, the left side that described skeleton 1 is positioned at secondary winding coil 3 below parts 12 is provided with described pin 4, its 4 other end 41 is respectively before this skeleton part 12, the rear side end face is drawn and is oppositely bent downwards and is close to this skeleton part 12 lower surfaces, this skeleton part 12 one is to the right extended, elementary winding copper sheet 2 embedded its in 12, elementary winding copper sheet 2 pins 21 are drawn and are oppositely bent downwards from its 12 its right end face and are close to its 12 lower surface, all greater than 1.4mm, the lower surface of described E shape magnetic core 5 is the bottom surface of instrument transformer to this copper sheet pin 21 to the beeline of E shape magnetic core 5 and secondary winding coil 3.As preferably, as shown in this embodiment, described pin 4 is concordant with the lower surface of described E shape magnetic core 5 with the lower surface that elementary winding copper sheet pin 21 is positioned at skeleton 1 below part, the termination end face of described elementary winding copper sheet pin 21 is 1.7mm to the beeline of E shape magnetic core 5, described secondary winding coil 3 is 1.9mm to the beeline of elementary winding copper sheet pin 21, for the 1.6mm of horizontal range adds that the 0.3mm of vertical range gets, described skeleton 1 height is 2.4mm less than 2.5mm.
Claims (5)
1. the heavy-current micro mutual inductor of a satisfying basic insulation, comprise skeleton, E shape magnetic core around skeleton, elementary winding copper sheet, secondary winding coil and pin, described skeleton is used to install between the square annular groove of magnetic core and the magnetic core frame inboard does not have barricade, the left side that described skeleton is positioned at secondary winding coil below part is provided with described pin, its other end is respectively before this skeleton part, the rear side end face is drawn and is oppositely bent downwards and is close to this skeleton part lower surface, it is characterized in that: this skeleton part one is to the right extended, elementary winding copper sheet is embedded in it, elementary winding copper sheet pin is drawn and is oppositely bent downwards from its its right end face and is close to its lower surface, all greater than 1.4mm, the lower surface of described E shape magnetic core is the bottom surface of instrument transformer to this copper sheet pin to the beeline of E shape magnetic core and secondary winding coil.
2. the heavy-current micro mutual inductor of a kind of satisfying basic insulation according to claim 1 is characterized in that: described pin is concordant with the lower surface of described E shape magnetic core with the lower surface that elementary winding copper sheet pin is positioned at skeleton below part.
3. the heavy-current micro mutual inductor of a kind of satisfying basic insulation according to claim 1 and 2, it is characterized in that: the termination end face of described elementary winding copper sheet pin is 1.7mm to the beeline of E shape magnetic core.
4. the heavy-current micro mutual inductor of a kind of satisfying basic insulation according to claim 3, it is characterized in that: described elementary winding copper sheet pin is 1.9mm to the beeline of secondary winding coil.
5. the heavy-current micro mutual inductor of a kind of satisfying basic insulation according to claim 4, it is characterized in that: described skeleton height is less than 2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202428460U CN201601015U (en) | 2009-10-29 | 2009-10-29 | Large-current mini mutual inductor meeting basic insulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202428460U CN201601015U (en) | 2009-10-29 | 2009-10-29 | Large-current mini mutual inductor meeting basic insulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201601015U true CN201601015U (en) | 2010-10-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202428460U Expired - Fee Related CN201601015U (en) | 2009-10-29 | 2009-10-29 | Large-current mini mutual inductor meeting basic insulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201601015U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101697316B (en) * | 2009-10-29 | 2012-10-03 | 成都金之川电子有限公司 | Heavy-current micro mutual inductor satisfying basic insulation |
| CN104036936A (en) * | 2014-06-03 | 2014-09-10 | 深圳振华富电子有限公司 | Current transformer |
-
2009
- 2009-10-29 CN CN2009202428460U patent/CN201601015U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101697316B (en) * | 2009-10-29 | 2012-10-03 | 成都金之川电子有限公司 | Heavy-current micro mutual inductor satisfying basic insulation |
| CN104036936A (en) * | 2014-06-03 | 2014-09-10 | 深圳振华富电子有限公司 | Current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101006 Termination date: 20121029 |