CN204155718U - A kind of switching mode power supply transformer combined magnet core - Google Patents
A kind of switching mode power supply transformer combined magnet core Download PDFInfo
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- CN204155718U CN204155718U CN201420691099.XU CN201420691099U CN204155718U CN 204155718 U CN204155718 U CN 204155718U CN 201420691099 U CN201420691099 U CN 201420691099U CN 204155718 U CN204155718 U CN 204155718U
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Abstract
The utility model relates to a kind of switching mode power supply transformer combined magnet core, comprise two or more first magnetic cores and one or more second magnetic cores, the sectional area of the synthesis magnetic circuit magnet of the second magnetic core is more than the twice of the sectional area of the synthesis magnetic circuit magnet of the first magnetic core or twice; The magnetic post of the second magnetic core is the twice of the first magnetic core magnetic post and the both sides being distributed in magnetic core magnet of positional symmetry, but the magnetic column length on the magnet both sides of the second magnetic core do not wait so make magnet both sides coiling window size not etc.; The center magnetic post of described first magnetic core and the second magnetic core is respectively around armature winding or the secondary winding of transformer.Combined magnet core described in the utility model makes the armature winding of transformer and secondary winding insulate completely to keep apart, the harmful effect problem that the transformer distributed capacitance of the armature winding and the double insulated problem of secondary winding and common process that solve the transformer of common process brings, make power transformer leakage inductance little, efficiency of transmission is high.
Description
Technical field
The utility model relates to a kind of magnetic core of switching mode power supply transformer, series-parallel magnetic core between the multiple windings particularly relating to a kind of applicable transformer.
Background technology
At present, in Switching Power Supply, transformer all adopts conventional structure shown in Fig. 3 mostly, the magnetic core of transformer is just formed overlapping combinations by the magnetic core 27 and 28 of upper and lower two halves three magnetic post, center magnetic post 33 and 34 is just to insertion coil rack 32, the armature winding of transformer and secondary winding are all along magnetic post parallel direction around in the winding slot of skeleton 32, insulate with insulating tape 31 between armature winding 29 and secondary winding 30 and isolate, armature winding 29 and secondary winding 30 wherein minimum to have the coiling of a winding three layer insulation wire or increase on winding both sides barricade insulating tape to meet the safe distance of safety standard requirement, cause complex process, processing charges is high.The transformer of conventional structure shown in Fig. 3 generally need divide multilayer coiling respectively at umber of turn winding of many s, interlayer distributed capacitance can be there is between layers, this electric capacity due to voltage spikes that resonance produces together with the leakage inductance of transformer carrys out the bad problems such as voltage stress is high, EMI noise is high, stand-by power consumption is high to Power supply belt, simultaneously, sandwich wound is divided also to make the distance of the skin of this winding and another winding of transformer farther, cause the field coupled effect of armature winding and secondary winding poor, the efficiency of transmission of transformer is low.
It is the flat surface transformer structural representation that existing another kind applies the shorter magnetic core of magnetic post shown in Fig. 4, the magnetic core of transformer is just formed overlapping combinations by the magnetic core 38 of upper and lower two halves three magnetic post and magnetic core 39, the armature winding 37 of transformer and secondary winding 35 all perpendicular to magnetic post around on the magnetic post of center, armature winding 37 and secondary winding 35 and to insulate isolation with insulating tape 36 respectively between magnetic core 38 and magnetic core 39.The magnetic core of this structure and winding distributed architecture, be difficult to accomplish to make to meet between armature winding and secondary winding double hyer insulation and safe distance requirement, the transformer of this structure is generally applied in the Switching Power Supply of the not high DC-to-DC of isolation voltage, and Switching Power Supply or the high-voltage switch power supply of the AC-to DC conversion of mains-supplied are difficult to application this kind of flat surface transformer.
Utility model content
In view of this, the utility model provide a kind of can adapt to switching mode power supply transformer insulation and efficiency requirements magnetic core, solve that existing switching mode power supply transformer distributed capacitance is high, technique for coiling is complicated, safe distance and double insulation requirement difficulty meet, the problem that efficiency of transmission is low.
The technical solution adopted in the utility model is: a kind of switching mode power supply transformer combined magnet core, comprise two or more first magnetic cores and one or more second magnetic cores, the sectional area of the synthesis magnetic circuit magnet of the second magnetic core is more than the twice of the sectional area of the synthesis magnetic circuit magnet of the first magnetic core or twice; The magnetic post of described second magnetic core is the twice of the first magnetic core magnetic post and the both sides being distributed in magnetic core magnet of positional symmetry; The magnetic column length on the magnet both sides of described second magnetic core do not wait so that make magnet both sides coiling window size not etc.; The center magnetic post of described first magnetic core and the second magnetic core is respectively around armature winding or the secondary winding of transformer.
Concrete implementation is: one second magnetic core is located between two the first magnetic cores and is formed a combined magnet core, and the magnetic post homalographic overlap of the magnetic core of two adjacent positions is just right, inserts insulating material between the magnetic post of overlapping just right different magnetic cores.
Another kind of concrete implementation is: two the second magnetic cores are located at side by side between two the first magnetic cores and are formed combined magnet core, and the magnetic post homalographic overlap of the magnetic core of two adjacent positions is just right, inserts insulating material between the magnetic post of overlapping just right different magnetic cores.
The third concrete implementation is: one second magnetic core is located between two the first magnetic cores and is formed combined magnet core unit, and the magnetic post homalographic overlap of the magnetic core of two adjacent positions is just right, inserts insulating material between the magnetic post of overlapping just right different magnetic cores; Multiple composite magnetic unit is set up in parallel formation combined magnet core.
Compared with prior art, the utility model tool has the following advantages:
(1) described combined magnet core is at least made up of the magnetic core of more than three or three, make the armature winding of switching mode power supply transformer and secondary winding can be distributed on adjacent different magnetic cores, can keep apart with very thin two-layer or two-layer above insulating material between armature winding and secondary winding, Area comparison overlapping between armature winding and secondary winding is large, apart from closer, thus the field coupled Benefit Transfer between armature winding and secondary winding is strong, leakage inductance is little, ensures that the efficiency of transmission of switching mode power supply transformer is higher;
(2) described combined magnet core, can keep apart with very thin two-layer or two-layer above insulating material between two often adjacent magnetic cores, and the armature winding of switching mode power supply transformer and secondary winding are distributed on adjacent different magnetic cores, make the withstand voltage and insulation distance between the armature winding of switching mode power supply transformer and secondary winding can meet the requirement of security for all countries standard completely, technique is simple, is easy to batch micro operations;
(3) described combined magnet core, formed by two kinds of different many magnetic post core combination, during use, the winding of any one multiturn number of switching mode power supply transformer can be divided into multistage coiling, each section of winding can be distributed in the coiling window of the magnetic core of many magnetic post respectively, distance between every layer of the winding of any one multiturn number Multi-layers distributing of transformer is increased, thus make the distributed capacitance between winding be reduced to the degree of ignoring, the bad problems such as transformer voltage stress is high, EMI noise is high, stand-by power consumption is high are greatly improved;
(4) described combined magnet core, the magnetic post of each magnetic core is shorter, combined magnet core is more flat, the coiling window of magnetic core is applicable to the winding of distribution plane type structure very much, the occupation efficiency of coiling window is higher, and the magnetic core after combination is applied to transformer and is equivalent to the transformer that multiple wattage transformer combined by connection in series-parallel, when exporting equal-wattage, described combined magnet core is less than conventional core volume, higher than the efficiency of transmission of conventional magnetic core.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment one of transformer combined magnet core described in the utility model;
Fig. 2 is transformer combined magnet core embodiment one application example schematic diagram described in the utility model;
Fig. 3 is a kind of structural representation of conventional transformer;
Fig. 4 is the structural representation of another kind of conventional plane transformer;
Fig. 5 is the compound mode schematic diagram one of many magnetic pole transformer magnetic core described in the utility model;
Fig. 6 is the compound mode schematic diagram two of many magnetic pole transformer magnetic core described in the utility model;
Fig. 7 is the compound mode schematic diagram three of many magnetic pole transformer magnetic core described in the utility model;
Fig. 8 is the vertical view of the three magnetic post magnetic cores that transformer described in the utility model uses.
Embodiment
The utility model to be explained in further detail below in conjunction with accompanying drawing and embodiment for the ease of it will be appreciated by those skilled in the art that.
As shown in Figure 1, 2, the magnetic core of switching mode power supply transformer described in the present embodiment, by comprising the magnetic core 2 of three magnetic posts and magnetic core 3 and the magnetic core 1 that comprises six magnetic posts combines.The center magnetic post 11 of magnetic core 1 and the center magnetic post 8 homalographic overlap of magnetic core 2 just right, the both sides magnetic post 9,10 of magnetic core 1 is just right with both sides magnetic post 6, the 7 homalographic overlap of magnetic core 2 respectively; The center magnetic post 14 of magnetic core 1 and the center magnetic post 17 homalographic overlap of magnetic core 3 just right, the both sides magnetic post 12,13 of magnetic core 1 is just right with both sides magnetic post 15, the 16 homalographic overlap of magnetic core 3 respectively; The specification of magnetic core 2 and magnetic core 3 and shape can be the magnetic cores such as E type, ER type, EFD type, EM type, ED type, EPC type, POT type, PQ type, RM type of three conventional magnetic posts, also can be the special core of more than three magnetic posts, the shape of magnetic core 1 be then the magnetic core more than special six magnetic posts corresponding with the shape of magnetic core 2 and magnetic core 3 or six magnetic posts.
Wherein, magnet 25 both sides of magnetic core 1 respectively distribute the relative coiling window in two positions and three magnetic posts 9,10,11, the half 21 of coiling window distribution transformer first winding on one side, coiling window distribution transformer first winding of another side second half 19 and second winding 20, the coiling window of the length of magnetic Zhu11He center, the center magnetic post 14 on the magnet both sides of magnetic core and the distribution of magnet both sides is asymmetrical, so that the first winding of matching transformer and the second winding, the occupation efficiency of transformer is improved.
The coiling window of magnetic core 2 is used for the half 18 of the tertiary winding of coiling transformer, the coiling window of magnetic core 3 be used for the 3rd winding of coiling transformer second half 22 and the 4th winding 23 of transformer; All windings are all perpendicular to the flat winding of the plane distribution of center magnetic post; Insert very thin two-layer or two-layer above insulating material 4 between magnetic core 1 and magnetic core 2, between magnetic core 1 and magnetic core 3, insert very thin two-layer or two-layer above insulating material 5.Owing to inserting two-layer or two-layer above insulating material, making insulate between the tertiary winding of the first winding of transformer, the second winding and transformer, the 4th winding completely keeps apart, and can meet double insulated safety standard requirement.
In the utility model, the coiling window of each magnetic core only distributes one and is divided into one of them single layer winding of multistage winding, the distributed capacitance of each winding can be made to drop to minimum.
Fig. 5-7 is the other three kinds of embodiment schematic diagrames of described combined magnet core of the present utility model, is applicable to the number of turn many, the transformer application that the winding number of plies is many.Wherein Fig. 5 to be the centre of combined magnet core be two be set up in parallel and magnetic post overlap just to the second magnetic core 1, another two the first magnetic cores 2 and the first magnetic core 3 apportion both sides combine.Fig. 6 is second magnetic core 1 between two identical the second magnetic cores 2 and the second magnetic core 3, relative with magnetic core 3 with the magnetic core 2 respectively magnetic post overlap of the magnetic post of magnetic core 1 is just to arranging composition magnetic core unit, and then the magnetic core unit parallel combinations of similar combination forms with another.Fig. 7 is first magnetic core 1 between two different the second magnetic cores, magnetic core 2 is different with the magnetic column length of magnetic core 3, but the sectional area of magnetic post is identical, relative with magnetic core 2 or the magnetic core 3 respectively magnetic post overlap of the magnetic post of magnetic core 1 is just to arranging composition magnetic core unit, and the magnetic core unit of then combination similar to another is overlapping just to combining again.Other implementations of the present utility model do not enumerate at this; as long as be positioned at centre by many magnetic post magnetic core, and two corresponding magnetic cores are had to be positioned at both sides, with intermediate magnetic just to setting; have similar combination more together, the combined magnet core of composition is all in the utility model protection range.
Be more than the preferred implementation of the utility model, it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these apparent replacement forms all belong to protection range of the present utility model.
Claims (5)
1. a switching mode power supply transformer combined magnet core, it is characterized in that: comprise two or more first magnetic cores and one or more second magnetic cores, the sectional area of the synthesis magnetic circuit magnet of the second magnetic core is more than the twice of the sectional area of the synthesis magnetic circuit magnet of the first magnetic core or twice; The magnetic post of described second magnetic core is the twice of the first magnetic core magnetic post and the both sides being distributed in magnetic core magnet of positional symmetry, but the magnetic column length on the magnet both sides of the second magnetic core do not wait so make magnet both sides coiling window size not etc.; The center magnetic post of described first magnetic core and the second magnetic core is respectively around armature winding or the secondary winding of transformer.
2. switching mode power supply transformer combined magnet core as claimed in claim 1, it is characterized in that: one second magnetic core is located between two the first magnetic cores and is formed combined magnet core, the magnetic post homalographic overlap of the magnetic core of two adjacent positions is just right, inserts insulating material between the magnetic post of overlapping just right different magnetic cores.
3. switching mode power supply transformer combined magnet core as claimed in claim 1, it is characterized in that: two the second magnetic cores are located at side by side between two the first magnetic cores and are formed combined magnet core, the magnetic post homalographic overlap of the magnetic core of two adjacent positions is just right, inserts insulating material between the magnetic post of overlapping just right different magnetic cores.
4. switching mode power supply transformer combined magnet core as claimed in claim 1, it is characterized in that: one second magnetic core is located between two the first magnetic cores and is formed combined magnet core unit, the magnetic post homalographic overlap of the magnetic core of two adjacent positions is just right, inserts insulating material between the magnetic post of overlapping just right different magnetic cores; Multiple composite magnetic unit is set up in parallel formation combined magnet core.
5. switching mode power supply transformer combined magnet core as claimed in claim 1, is characterized in that: described first magnetic core is any one three magnetic post magnetic core in E type, ER type, EFD type, EM type, ED type, EPC type, POT type, PQ type or RM type; Second magnetic core is shape six magnetic post magnetic cores corresponding with the first core shapes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420691099.XU CN204155718U (en) | 2014-11-18 | 2014-11-18 | A kind of switching mode power supply transformer combined magnet core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420691099.XU CN204155718U (en) | 2014-11-18 | 2014-11-18 | A kind of switching mode power supply transformer combined magnet core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204155718U true CN204155718U (en) | 2015-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420691099.XU Withdrawn - After Issue CN204155718U (en) | 2014-11-18 | 2014-11-18 | A kind of switching mode power supply transformer combined magnet core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204155718U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104376981A (en) * | 2014-11-18 | 2015-02-25 | 天宝电子（惠州）有限公司 | Switching power supply transformer combined magnetic core |
| CN111933434A (en) * | 2020-08-10 | 2020-11-13 | 西安电子科技大学 | Planar transformer |
-
2014
- 2014-11-18 CN CN201420691099.XU patent/CN204155718U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104376981A (en) * | 2014-11-18 | 2015-02-25 | 天宝电子（惠州）有限公司 | Switching power supply transformer combined magnetic core |
| CN104376981B (en) * | 2014-11-18 | 2017-06-13 | 天宝电子（惠州）有限公司 | A kind of switching mode power supply transformer combined magnet core |
| CN111933434A (en) * | 2020-08-10 | 2020-11-13 | 西安电子科技大学 | Planar transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150211 Effective date of abandoning: 20170613 |