CN1767095A - Transformer and transformer production method - Google Patents
Transformer and transformer production method Download PDFInfo
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- CN1767095A CN1767095A CN 200510114130 CN200510114130A CN1767095A CN 1767095 A CN1767095 A CN 1767095A CN 200510114130 CN200510114130 CN 200510114130 CN 200510114130 A CN200510114130 A CN 200510114130A CN 1767095 A CN1767095 A CN 1767095A
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- magnetic core
- transformer
- central leg
- coil
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Abstract
To ensure full performance as designed, improve durability and also realize low cost by effectively radiating heat generated within a transformer to the external side without increase in the number of components. A core is provided to form a closed magnetic path by accommodating a primary winding and a secondary winding for electromagnetic induction between the windings. The core is provided with a first core including a pair of side legs erected from a base and at least a center leg allocated within an interval of a pair of side legs, and a second core allocated to close the upper opening surface of the first core. At the external circumference of the center leg, a bobbin type winding frame is mounted for winding the primary winding and the secondary winding. The second core is provided with at least one through hole at the position opposing to a gap generated between the external circumferential surface of the center leg and the internal circumferential surface of the winding frame when the winding frame is provided to the center leg.
Description
Technical field
The present invention relates to be used for the backlight of liquid crystal panel with electronic equipments such as the power circuit transformer of power circuit and the manufacture method of this transformer.
Background technology
The bobbin that general transformer forms reel 1 coil and 2 coils is clamped in the state between relative up and down a pair of magnetic core.Thereby if produce heat at coil portion, this heat is just shrouded in magnetic core portion, not only can not bring into play performance by design, and can cause equipment fault when the most serious.
In the past, be used for the transformer of electronic equipment, developing the multiple technology that is used to handle from the heat of coil portion generation with power circuit.
For example, a kind of following transformer is disclosed: form the heat-conducting layer that is made of silicone layer etc. between 1 coil and 2 coils, improve the thermal conductivity between 1 coil and 2 coils, to give 2 coils in the heat conduction that 1 coil produces, cold sinks that diode (led) module had by directly linking with 2 coils then, carry out the heat radiation (for example, with reference to patent documentation 1: the Japan Patent spy opens the 2002-237416 communique) of transformer inside.
But, in the transformer in the past of above-mentioned patent documentation 1 record, must between 1 coil and 2 coils, clamp the heat-conducting layer that constitutes by silicone layer etc., its result exists components number to increase, and manufacturing process is loaded down with trivial details, simultaneously the problem that rises of manufacturing cost.
Summary of the invention
The present invention proposes in view of the above fact, its purpose is to provide the manufacture method of a kind of transformer and transformer, can be under the situation that does not increase components number, distribute in the inner heat that produces of transformer to the outside expeditiously, thereby can be really by design performance performance, improve durability simultaneously, and reduce manufacturing cost.
The manufacture method of transformer of the present invention and transformer for achieving the above object, has following feature.
That is, transformer of the present invention is accommodated 1 coil and 2 coils and is formed the closed circuit magnetic core portion of magnetic possessing, and forms between described 1 coil and described 2 coils in the transformer of electromagnetic induction, it is characterized in that:
Described magnetic core portion possesses:
The 1st magnetic core, have in upright 1 offside leg of establishing of basal part and the interval that is located at this 1 offside leg at least 1 central leg and
The 2nd magnetic core sets in the mode of the top open surface of capping the 1st magnetic core;
The bobbin portion of the spool-like of reel described 1 coil and described 2 coils is installed at the peripheral part of described central leg;
Described the 2nd magnetic core, when being installed in described bobbin portion on the described central leg, and the position that is created in the clearance portion subtend between the inner peripheral surface of the outer peripheral face of described central leg and described bobbin portion at least 1 through hole is set.
In addition, transformer of the present invention, in above-mentioned formation, preferred: the clearance portion that produces between the inner peripheral surface of the outer peripheral face of described central leg and described bobbin portion forms in the mode towards the top hole enlargement.
In this case, can form towards the conical surface of top hole enlargement by inner peripheral surface, and make described clearance portion, in addition towards the top hole enlargement with described bobbin portion, form towards the conical surface of top undergauge by outer peripheral face, and make described clearance portion towards the top hole enlargement with described central leg.
The manufacture method of transformer of the present invention is to possess to accommodate 1 coil and 2 coils and form the closed circuit magnetic core portion of magnetic, forms the manufacture method of the transformer of electromagnetic induction between described 1 coil and described 2 coils, it is characterized in that:
Form described magnetic core portion, so that this magnetic core portion possesses: have the 1st magnetic core of at least 1 central leg in upright 1 offside leg of establishing of basal part and the interval that is located at this 1 offside leg and the 2nd magnetic core that sets in the mode of the top open surface of capping the 1st magnetic core;
The bobbin portion of the spool-like of reeled described 1 coil and described 2 coils is installed at the peripheral part of described central leg;
Described the 2nd magnetic core forms: when being installed in described bobbin portion on the described central leg, and the position that is created in the clearance portion subtend between the inner peripheral surface of the outer peripheral face of described central leg and described bobbin portion at least 1 through hole is set;
Then, by injecting adhesive from being located in the clearance portion of through hole between the inner peripheral surface of outer peripheral face that is created in described central leg and described bobbin portion on described the 2nd magnetic core, and bonding integratedly described the 1st magnetic core, described bobbin portion and described the 2nd magnetic core.
Transformer of the present invention is provided with at least 1 through hole on the 2nd magnetic core of the top open surface of capping the 1st magnetic core.And this through hole is arranged on and is created on the position of the clearance portion subtend between the inner peripheral surface of the outer peripheral face of central leg of the bobbin portion that spool-like is installed and bobbin portion.
Therefore, in the heat that coil portion takes place, dispel the heat to the outside of magnetic core portion from the through hole that is located on the 2nd magnetic core.So, the such particular component of heat-conducting layer that is made of silicone layer etc. need not be set, also can distribute the heat that produces in magnetic core portion to the outside of magnetic core portion, can cut down components number, reduce manufacturing cost, also be easy to simultaneously make.In addition, because heat is not shrouded in magnetic core portion,, can improve the durability of transformer simultaneously so can bring into play performance by design really.
In addition, transformer of the present invention forms towards the conical surface of top hole enlargement or with the outer peripheral face of central leg by the inner peripheral surface with bobbin portion and to form towards the conical surface of top undergauge, and makes described clearance portion towards the top hole enlargement.
So, in manufacturing process, even the installation site at the 2nd magnetic core produces small error, also can make the through hole that is located on the 2nd magnetic core relative, can distribute the heat that produces in magnetic core portion to the outside of magnetic core portion really with the clearance portion that between the inner peripheral surface of the outer peripheral face of central leg and bobbin portion, produces.
In addition, according to the manufacture method of transformer of the present invention, can be easily and make the transformer of fine heat radiation property at an easy rate.And, because by injecting adhesive from being located in the clearance portion of through hole between the inner peripheral surface of outer peripheral face that is created in central leg and bobbin portion on the 2nd magnetic core, can bonding integratedly the 1st magnetic core, bobbin portion and the 2nd magnetic core, so can reduce the man-hour in the manufacture process, can reduce manufacturing cost.
In addition, when injecting adhesive from through hole in clearance portion, adhesive is not full of in the whole clearance portion, and adhesive is hardly in the top and through hole attached to clearance portion.By injection adhesive like this, can distribute the heat that produces in magnetic core portion to the outside of magnetic core portion really by clearance portion and through hole.
Description of drawings
Fig. 1 is the exploded perspective view of the leakage transformer of embodiments of the present invention.
Fig. 2 is the vertical view (a) of the leakage transformer of embodiments of the present invention and the A-A profile (b) on the vertical view (a).
Fig. 3 constitutes the central leg of the 1st magnetic core of leakage transformer of embodiments of the present invention and the part sectioned view of bobbin portion.
Fig. 4 is the part sectioned view of other execution mode of the central leg of the 1st magnetic core of the expression leakage transformer that constitutes embodiments of the present invention and bobbin portion.
Among the figure: 10-leakage transformer, 20-the 1st magnetic core, 21-basal part, 22-side leg, 23-central authorities leg, the 24-pillar, the 25-conical surface, 30-the 2nd magnetic core, 31-body, the 31-engaging recessed part, 33-through hole, 40-bobbin portion, 41-pallet, 42a, 43a, 46a-portion of terminal, 43b, 46b-twine terminal, 44a～44c-flange part, the 45-conical surface, the 50-dottle pin, the 51-substrate, the 52-division board, 53-locatees teat, the 54-through hole, 70-1 coil, 80-2 coil, 90-clearance portion.
Embodiment
Below, with reference to accompanying drawing, the execution mode of the manufacture method of transformer of the present invention and transformer is described.In addition, in execution mode shown below, be that example describes with the leakage transformer.
Fig. 1～Fig. 4 represents leakage transformer according to the embodiment of the present invention, Fig. 1 represents the exploded perspective view of leakage transformer, Fig. 2 (a) is the vertical view of leakage transformer, Fig. 2 (b) is the A-A profile among Fig. 2 (a), Fig. 3 constitutes the central leg of the 1st magnetic core of leakage transformer and the part sectioned view of bobbin portion, and Fig. 4 is the part sectioned view of other execution mode of the central leg of expression the 1st magnetic core that constitutes leakage transformer and bobbin portion.
＜leakage transformer 〉
The leakage transformer of present embodiment is provided with the space between the central leg of the 1st magnetic core and the 2nd magnetic core, form in the mode that some leakage fluxs take place thus.In addition, the leakage transformer of present embodiment, being the transformer of lamp circuit etc. that is used to light the backlight of liquid crystal indicator, being commonly referred to as two leakage transformers, is the transformer that uses in the DC/AC converter circuit in order to make 2 CCFL (cold-cathode discharge lamp) discharge, light a lamp simultaneously.
As Fig. 1～shown in Figure 4, this leakage transformer 10 possesses and accommodates 1 coil 70 and 2 coils 80 and form the closed circuit magnetic core portion (the 1st magnetic core 20 and the 2nd magnetic core 30) of magnetic, forms electromagnetic induction between 1 coil 70 and 2 coils 80.
＜magnetic core portion 〉
Magnetic core portion has the 1st magnetic core 20 and with the 2nd magnetic core 30 of the top open surface of capping the 1st magnetic core 20.
The 1st magnetic core 20 has the central leg 23 of 1 couple in upright 1 offside legs of establishing 22 of basal part 21 and the interval that is located at this 1 offside leg 22.In addition, on basal part 21, with the upright pair of posts 24 that is used to install dottle pin 50 of establishing of the mode between a pair of central leg 23.In addition, the 1st magnetic core 20 and the 2nd magnetic core 30 for example adopt ferrite to form.
＜bobbin portion 〉
The a pair of bobbin portion 40 that is installed on the peripheral part of each central leg 23 forms spool-like, is installed on the pallet 41 that is made of the insulating properties material.On this pallet 41, be provided for connecting portion of terminal 42a, 43a, the 46a of the end of 1 coil 70 and 2 coils 80 and twine terminal 43b, 46b, this portion of terminal 42a, 43a, 46a and winding terminal 43b, 46b, be located at the both sides of pallet 41 respectively, portion of terminal 42a be set in the side of the portion of terminal 42a that connects 1 coil 70 and twine terminal 43b.Portion of terminal 42a and winding terminal 43b are interconnected in the inside of pallet 41, and a side's of 2 coils 80 end is connected twines on the terminal 46b, and the opposing party's end is connected twines on the terminal 43b.
Bottom, pars intermedia and upper end in the periphery of bobbin portion 40 are provided with flange part 44a～44c, become 2 coil portions of 2 coils 80 that are used to reel in the interval of the flange part 44a of bottom and the flange part 44b of pars intermedia, become 1 coil portion of 1 coil 70 that is used to reel in the interval of the flange part 44c of upper end and the flange part 44b of pars intermedia.In addition, also can constitute 1 coil portion and 2 coil portions in alternatively up and down ground.
The interior Zhou Jing of bobbin portion 40 forms than the periphery footpath that is located at the central leg 23 on the 1st magnetic core 20 slightly bigly, forms clearance portion 90 between the inner peripheral surface of the outer peripheral face of central leg 23 and bobbin portion 40.
In addition, as shown in Figure 3, bobbin portion 40 by inner circumferential surface being formed the conical surface 45 towards the top hole enlargement, and becomes the state of clearance portion 90 towards the top hole enlargement.In addition, the position of the hole enlargement of the inner peripheral surface of beginning bobbin portion 40 can be that bottom from bobbin portion 40 is to any position the upper end.
In addition, as shown in Figure 4, also can: by the outer peripheral face of central leg 23 being formed the conical surface 25 towards the top undergauge, and with clearance portion 90 towards the top hole enlargement.In such cases, the position of hole enlargement that begins the outer peripheral face of central leg 23 can be that bottom from central leg 23 is to any position the upper end.
＜dottle pin 〉
Dottle pin 50 is intervals of a pair of bobbin of regulation portion 40, carries out the parts of the location of the 2nd magnetic core 30 simultaneously.This dottle pin 50, have substrate 51, from substrate 51 following face down the division board 52 that is provided with, be located at substrate 51 above both sides on locator protrusions 53, make and be located at a pair of through hole 54 that the pillar 24 on the 1st magnetic core 20 runs through.
＜the 2 magnetic core 〉
About the 2nd magnetic core 30, on the side longitudinally of tabular main body 31, be provided for engaging the engaging recessed part 32 of the location teat 53 of dottle pin 50, and be created on the position of clearance portion 90 subtends between the inner peripheral surface of the outer peripheral face of central leg 23 and bobbin portion 40 through hole 33 be set.In addition, in the execution mode of Figure 1 and Figure 2, through hole 33 is provided with one by one with respect to each clearance portion 90, but also can be provided with 2 with respect to each clearance portion 90, more than 3 or 4.
The manufacturing of＜leakage transformer 〉
Below, the manufacture method of the leakage transformer 10 of present embodiment is described.
Make the leakage transformer 10 of present embodiment, 2 coils 80 of at first on 2 coil portions that are formed between flange part 44a and the flange part 44b, reeling, 1 coil 70 of reeling on 1 coil portion that is formed between flange part 44b and the flange part 44c simultaneously is connected portion of terminal 42a, 43a, 46a with the both ends of each coil and twines on any one of terminal 43b, 46b.
Then, to be formed on central leg 23 on the 1st magnetic core 20 through the interior perimembranous of each bobbin portion 40, to be located at simultaneously and run through the pair of posts 24 that is formed on the 1st magnetic core 20 in the through hole 54 on the dottle pin 50, dottle pin 50 will be installed in the interval of two bobbin portions 40.
Then, place the 2nd magnetic core 30, the top open surface of capping the 1st magnetic core on the top of each bobbin portion 40 and dottle pin 50.
Afterwards, from being located at the through hole 33 on the 2nd magnetic core 30, inject adhesive, bonding integratedly the 1st magnetic core 20, bobbin portion 440 and the 2nd magnetic core 30 in the clearance portion 90 between the inner peripheral surface of outer peripheral face that is created in central leg 23 and bobbin portion 40.At this moment, adhesive is not full of in the whole clearance portion, and adhesive is hardly in the top and through hole attached to clearance portion.
The heat radiation of＜the heat that produces in magnetic core portion 〉
If streaming current in 1 coil 70 and 2 coils 80 just produces heat at each coil 70,80.The part that this is hot, the 1st magnetic core 20 and the 2nd magnetic core 30 are given in conduction, dispel the heat in atmosphere.In addition, in most of heat that each coil 70,80 produces,,, dispel the heat to the outside from the through hole 33 that is located on the 2nd magnetic core 30 via the clearance portion 90 between the inner peripheral surface of outer peripheral face that is created in central leg 23 and bobbin portion 40 by cross-ventilation or radiation.
Thereby because the heat that produces in magnetic core portion, really to the heat radiation of the outside of magnetic core, heat is not shrouded in magnetic core inside via through hole 33, so can improve durability simultaneously really by design performance performance.
For example, though the leakage transformer in the past that through hole 33 is not set when driving self-heating and reach about 23 ℃, but the self-heating of leakage transformer 10 when driving that the present embodiment of through hole 33 is set reaches about 21 ℃, temperature approximately reduces by 2 ℃, as being used for the backlight of liquid crystal panel, has very effective radiating effect with the leakage transformer 10 of electronic equipments such as power circuit with power circuit.
＜other execution mode 〉
In addition, form the 1st magnetic core 20 and the 2nd magnetic core 30 by ferrite, but formation material as magnetic core, also be not limited to this, also can from other common core material, select, for example, can adopt materials such as permalloy, Sendust, carbonyl iron, also can use the mold pressing magnetic core of the above-mentioned powder of compression forming.
In addition, in the present embodiment, being defined as the two leakage transformers with 2 bobbin portions 40, is that 1 transformer or bobbin portion is 3, the transformer more than 4 but also can be used for bobbin portion 40.
In addition, the purposes of transformer of the present invention is not limited to leakage transformer 10, also can be used in the transformer of other kind.
Claims (5)
1. transformer possesses and accommodates 1 coil and 2 coils and form the closed circuit magnetic core portion of magnetic, forms electromagnetic induction between described 1 coil and described 2 coils, it is characterized in that:
Described magnetic core portion possesses:
The 1st magnetic core, have in upright 1 offside leg of establishing of basal part and the interval that is located at this 1 offside leg at least 1 central leg and
The 2nd magnetic core sets in the mode of the top open surface of capping the 1st magnetic core;
The bobbin portion of the spool-like of be used to reel described 1 coil and described 2 coils is installed at the peripheral part of described central leg;
Described the 2nd magnetic core, when being installed in described bobbin portion on the described central leg, and the position that is created in the clearance portion subtend between the inner peripheral surface of the outer peripheral face of described central leg and described bobbin portion at least 1 through hole is set.
2. transformer as claimed in claim 1 is characterized in that: the clearance portion that produces between the inner peripheral surface of the outer peripheral face of described central leg and described bobbin portion forms in the mode towards the top hole enlargement.
3. transformer as claimed in claim 2 is characterized in that: form towards the conical surface of top hole enlargement by the inner peripheral surface with described bobbin portion, and make described clearance portion towards the top hole enlargement.
4. transformer as claimed in claim 2 is characterized in that: form towards the conical surface of top undergauge by the outer peripheral face with described central leg, and make described clearance portion towards the top hole enlargement.
5. the manufacture method of a transformer, this transformer possess accommodates 1 coil and 2 coils and forms the closed circuit magnetic core portion of magnetic, forms electromagnetic induction between described 1 coil and described 2 coils, it is characterized in that:
Form described magnetic core portion, so that this magnetic core portion possesses: have the 1st magnetic core of at least 1 central leg in upright 1 offside leg of establishing of basal part and the interval that is located at this 1 offside leg and the 2nd magnetic core that sets in the mode of the top open surface of capping the 1st magnetic core;
The bobbin portion of the spool-like of be used to reel described 1 coil and described 2 coils is installed at the peripheral part of described central leg;
Described the 2nd magnetic core forms: when being installed in described bobbin portion on the described central leg, and the position that is created in the clearance portion subtend between the inner peripheral surface of the outer peripheral face of described central leg and described bobbin portion at least 1 through hole is set;
Then, by injecting adhesive from being located in the clearance portion of through hole between the inner peripheral surface of outer peripheral face that is created in described central leg and described bobbin portion on described the 2nd magnetic core, and bonding integratedly described the 1st magnetic core, described bobbin portion and described the 2nd magnetic core.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004311119A JP4349526B2 (en) | 2004-10-26 | 2004-10-26 | Transformer and transformer manufacturing method |
| JP2004311119 | 2004-10-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1767095A true CN1767095A (en) | 2006-05-03 |
| CN100557728C CN100557728C (en) | 2009-11-04 |
Family
ID=36722619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101141309A Expired - Fee Related CN100557728C (en) | 2004-10-26 | 2005-10-18 | The manufacture method of transformer and transformer |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4349526B2 (en) |
| CN (1) | CN100557728C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623143A (en) * | 2011-01-28 | 2012-08-01 | 李钟学 | High-voltage transformer having ventilation duct for microwave oven |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5750911B2 (en) * | 2011-01-27 | 2015-07-22 | 富士電機株式会社 | Magnetic core |
-
2004
- 2004-10-26 JP JP2004311119A patent/JP4349526B2/en not_active Expired - Fee Related
-
2005
- 2005-10-18 CN CNB2005101141309A patent/CN100557728C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623143A (en) * | 2011-01-28 | 2012-08-01 | 李钟学 | High-voltage transformer having ventilation duct for microwave oven |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100557728C (en) | 2009-11-04 |
| JP4349526B2 (en) | 2009-10-21 |
| JP2006128198A (en) | 2006-05-18 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091104 Termination date: 20161018 |