CN101859638B - Transformer structure with leakage inductance - Google Patents
Transformer structure with leakage inductance Download PDFInfo
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- CN101859638B CN101859638B CN 200910133087 CN200910133087A CN101859638B CN 101859638 B CN101859638 B CN 101859638B CN 200910133087 CN200910133087 CN 200910133087 CN 200910133087 A CN200910133087 A CN 200910133087A CN 101859638 B CN101859638 B CN 101859638B
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Abstract
The invention relates to a transformer structure with leakage inductance, comprising: a winding base, comprising a primary winding part, a first secondary winding part, a second secondary winding part and a penetrating passage, wherein the bottom surface of the winding base is provided with a first through hole, and the first through hole is communicated with the penetrating passage; a primary winding wire wound on the primary winding part; a first secondary winding wire and a second secondary winding wire respectively wound on the first secondary winding part and the second secondary winding part; and a magnetic core group at least partially arranged in the penetrating passage of the winding base at least and comprising a first magnetic core part and a second magnetic core part, wherein the second magnetic core part is provided with a first extending column, the first extending column is installed in the first through hole of the winding base. The invention can increase or adjust the leakage inductance and is suitable for various resonant circuits while the leakage inductance can be increased and adjusted; moreover, the electromagnetic interference or impact to the adjacent electron component and circuit on the circuit board cannot be generated relatively.
Description
Technical field
The present invention relates to a kind of transformer device structure, particularly a kind of transformer device structure of tool leakage inductance.
Background technology
Transformer is the electronic building brick that often uses in the various electric equipment, and in order to the adjustment different voltages with different, making it reach electrical equipment can applicable scope.See also Fig. 1, it is the structural representation of a traditional transformer.As shown in Figure 1, this transformer 1 mainly comprises magnetic core set 11 (magnetic core assembly), winding base 12 (bobbin), elementary coiling 13 (primary winding coil) and secondary rolling thread 14 (secondary winding coil).Wherein, elementary coiling 13 and secondary rolling thread 14 ground (overlap) that overlaps each other is wound in the winding section 121 of winding base 12, and with for example insulating tape 15 (isolation tape) insulated separation.Magnetic core set 11 is made up of first magnetic core component 111 and 112 of second magnetic core components usually; The part-structure of magnetic core set 11; For example center pillar 111a, the 112a of first magnetic core component 111 and second magnetic core component 112; Be arranged in the passage 122 of winding base 12, make magnetic core set 11 and elementary coiling 13 and secondary rolling thread 14 produce the electromagnetic coupled induction, reach the purpose of voltage transitions thus.
Generally speaking, the control of transformer magnetic leakage sense (leakage inductance) is very important to power supply changeover device, because it will have influence on the power conversion efficiency of power supply changeover device.For promoting the power conversion efficiency of power supply changeover device, correlation technique has been devoted to increase the coupling efficiency of transformer coiling, reduces the magnetic leakage sense, and then reduces the energy loss of voltage transitions.In transformer device structure shown in Figure 1; Because elementary coiling 13 is wound in the winding section 121 of winding base 12 with secondary rolling thread 14 with overlapping each other; Therefore elementary coiling 13 forms less magnetic leakage with secondary rolling thread 14, and coiling coupling efficiency (coupling coefficient) is higher, and the magnetic leakage sense is lower; Energy loss through the transformer changing voltage is less, can promote the power conversion efficiency of power supply changeover device thus.
Yet; At for example LCD (Liquid Crystal Display; LCD) etc. in the electronic product of new generation, because LCD can't be directly luminous and must provide display panels required light source through backlight module (Backlight module).Usually backlight module must use discharge lamp (Discharge lamp) as backlight; Cold-cathode fluorescence lamp (Cold Cathode Fluorescent Lamp for example; CCFL); These discharge lamps then need to drive through converter (Inverter) circuit of power system; Because the size of display panels increases day by day, use the length of fluorescent tube and quantity also to increase relatively, its driving voltage also increases thereupon; Therefore the employed transformer of converter (Inverter) circuit is a main flow with the transformer of high pressure and tool magnetic leakage sense type then, and the separating part that the transformer device structure of this type utilizes winding base is with elementary coiling and secondary rolling thread is separated and make both keep the electrical safety distance.In the application of this type, the LC resonant circuit that the electric current of power system can be earlier constituted through the intrinsic magnetic leakage sense L of a transformer primary and a capacitance component C simultaneously, is similar to half sinusoidal wave electric current and can passes through power field effect transistor switch.When electric current was zero, switch was conducting, and when returning zero through half sinusoidal wave after-current, switch will cut out.Adopt the soft switch designs of this tool resonant circuit, can reduce switching loss, the reduction noise of switch module and promote usefulness.
As previously mentioned, because the size of display panels increases day by day, thereby the fluorescent tube length of its use and quantity also increase relatively; So required driving voltage also increases thereupon, therefore, the transformer of lamp tube drive circuit that generally is applied to LCD is as shown in Figure 2; As shown in the figure; Existing transformer 2 comprises magnetic core set 21, first winding section 22, second winding section 23, elementary coiling 24 and secondary rolling thread 25, and wherein, first winding section 22 has first side plate 26; Second winding section 23 then has second side plate 27 and a plurality of dividing plate 23a, and definition forms a plurality of winding slot 23b between a plurality of dividing plate 23a and second side plate 27.Have a pedestal 26a and a 27a respectively at first side plate 26 and second side plate, 27 bottoms, pedestal 26a is provided with a plurality of pins 28, and on pedestal 27a, also is provided with a plurality of pins 29.
The winding mode of the elementary coiling 24 of transformer 2 is intertwined and connected an end on the pin 28a of pedestal 26a earlier; Be wound on first winding section 22, last loop line is intertwined and connected the other end on pin 28b again, and the winding mode of secondary rolling thread 25 then is intertwined and connected an end on the pin 29a of pedestal 27a earlier; Be wound in regular turn again on the winding slot 23b on second winding section 23; At last by second winding section, 23 loop lines to pedestal 27a, again the other end is intertwined and connected on pin 29b, thus; Then can make and keep certain electrical safety distance between elementary coiling 24 and the secondary rolling thread 25, and make it have the magnetic leakage sense through the dividing plate 23a on second winding section 23.
Yet, in existing transformer 2, because elementary coiling 24 and secondary rolling thread 25 utilize main magnetic circuit to produce induction and then change voltage; There is not any bypass magnetic flux; Its coupling effect is preferable, so the leakage inductance that forms is relatively low and can't adjust, thereby can't reach the requirement of partial resonance circuit.In addition, because the electromagnetic action of transformer 2 produces electromagnetic interference or influence to electronic building brick contiguous on the circuit board or circuit easily, and then influence the electrical of power system.
Therefore, how to develop a kind of defective of improving prior art, and the transformer device structure that can adjust leakage inductance and improve electromagnetic interference problem, real in pressing for the problem of research and development at present.
Summary of the invention
Main purpose of the present invention is to provide a kind of transformer device structure of tool leakage inductance, can adjust leakage inductance and to improve electromagnetic interference problem.
For reaching above-mentioned purpose; Of the present invention one is the transformer device structure that a kind of tool leakage inductance is provided than the broad sense form of implementation; Comprise: winding base; Comprise elementary winding section, first secondary winding portion, second subprime winding section and penetrating via, wherein this first secondary winding portion and this second subprime winding section have first side wall and second side wall respectively, and the bottom surface of this winding base has first through hole, second through hole, first fluting and second fluting; This first through hole and this second through hole are connected with penetrating via; This first fluting and this second fluting are extended to the two ends of this penetrating via by this bottom surface of this winding base respectively and are connected, and this first fluting is arranged in this first side wall, and this second fluting is arranged in this second side wall; Elementary coiling is set around elementary winding section; First secondary winding and second subprime coiling are set around first secondary winding portion and second subprime winding section respectively; And magnetic core set; At least part is arranged at the penetrating via of winding base; And comprise first magnetic core component and second magnetic core component; Wherein second magnetic core component has first extending column, second extending column, first lateral column and second lateral column, and this first extending column and this second extending column are arranged in first through hole and this second through hole of bottom surface of winding base, and forms the gap with this first magnetic core component respectively; This first lateral column is arranged in this first fluting of this bottom surface of this winding base; And contact with the first end of this first magnetic core component, this second lateral column is arranged in this second fluting of this bottom surface of this winding base, and contacts with the second end of this first magnetic core component.
For reaching above-mentioned purpose; Of the present invention another is the transformer device structure that a kind of tool leakage inductance is provided than the broad sense form of implementation; Comprise: winding base; Comprise the first elementary winding section, the second elementary winding section, first secondary winding portion, second subprime winding section and penetrating via, wherein this first secondary winding portion and this second subprime winding section have first side wall and second side wall respectively, and the bottom surface of this winding base has first through hole, second through hole, first fluting and second fluting; This first through hole and this second through hole are connected with penetrating via; This first fluting and this second fluting are extended to the two ends of this penetrating via by this bottom surface of this winding base respectively and are connected, and this first fluting is arranged in this first side wall, and this second fluting is arranged in this second side wall; The first elementary coiling and the second elementary coiling are set around the first elementary winding section and the second elementary winding section respectively; First secondary winding and second subprime coiling are set around first secondary winding portion and second subprime winding section respectively; And magnetic core set; At least part is arranged at the penetrating via of winding base; And comprise first magnetic core component and second magnetic core component; Wherein second magnetic core component has first extending column, second extending column, first lateral column and second lateral column, and this first extending column and this second extending column are arranged in first through hole and this second through hole of bottom surface of winding base, and forms the gap with this first magnetic core component respectively; This first lateral column is arranged in this first fluting of this bottom surface of this winding base; And contact with the first end of this first magnetic core component, this second lateral column is arranged in this second fluting of this bottom surface of this winding base, and contacts with the second end of this first magnetic core component.
Leakage inductance be can increase or adjust through the present invention, under leakage inductance increase and adjustable situation,, relatively more can electromagnetic interference or influence be produced in addition electronic building brick contiguous on the circuit board and circuit just applicable to various resonant circuits.
Description of drawings
Fig. 1: it is the structural representation of a traditional transformer.
Fig. 2: it is the structural representation of another existing transformer.
Fig. 3 A and Fig. 3 B: it shows the bottom surface and the Facad structure exploded view of transformer of the tool leakage inductance of preferred embodiment of the present invention.
Fig. 4: the structural representation that is arranged at a circuit board after its transformer that shows tool leakage inductance shown in Fig. 3 A and Fig. 3 B makes up.
Fig. 5: it is the part-structure sectional view of Fig. 4.
Fig. 6 A and Fig. 6 B: it shows transformer device structure shown in Fig. 3 A and Fig. 3 B is isolated secondary rolling thread and magnetic core component with the insulation lid structural representation and sectional view.
Fig. 7 A and Fig. 7 B: it shows the bottom surface and the Facad structure exploded view of transformer of the tool leakage inductance of another preferred embodiment of the present invention.
Fig. 8: the structural representation that is arranged at a circuit board after its transformer that shows tool leakage inductance shown in Fig. 7 A and Fig. 7 B makes up.
Fig. 9: it is the part-structure sectional view of Fig. 8.
Figure 10 A and Figure 10 B: it shows transformer device structure shown in Fig. 7 A and Fig. 7 B is isolated secondary rolling thread and magnetic core component with the insulation lid structural representation and sectional view.
Wherein, description of reference numerals is following:
Transformer: 1,2 magnetic core set: 11,21
Winding base: 12 elementary coilings: 13,24
Secondary rolling thread: 14,25 first winding sections: 22
Second winding section: 23 first magnetic core components: 111
Second magnetic core component: 112 center pillars: 111a, 112a
Winding section: 121 insulating tapes: 15
Passage: 122 first side plates: 26
Second side plate: 27 dividing plates: 23a
Winding slot: 23b pedestal: 26a, 27a
28,29,28a, 28b, 29a, 29b pin:
The transformer of tool leakage inductance: 3,6 winding base: 31,61
Elementary coiling: 32 first secondary windings: 33,63
First elementary coiling: the 62a, second elementary coiling: the 62b
Second subprime coiling: 34,64 magnetic core set: 35,65
Elementary winding section: 36,66 first secondary winding portions: 37,67
First elementary winding section: the 66a, second elementary winding section: the 66b
Second subprime winding section: 38,68 penetrating vias: 39,69
Bottom surface: 311,611 first through holes: 312,612
Second through hole: 319,619 first magnetic core components: 351,651
Second magnetic core component: 352,652 first extending column: 352a, 652a
Demarcation strip: 361,371,381,661,671,681
Winding slot: 362 first barricades: 313,613
Second barricade: 314,614 first side walls: 315,615
Second side wall: 316,616 winding slots: 372,382,672,682
Groove: 363,373,383,673,683
Pin: 310,610 first connecting portion: 310a, 610a
Second connecting portion: 310b, 610b flat part: 352b, 652b
Connecting seat: 313a, 313b, 314a, 314b, 315a, 315b, 316a, 316b, 361a, 613a, 613b, 614a, 614b, 615a, 615b, 616a, 616b, 661a
First lateral column: 352c, 652c second lateral column: 352d, 652d
Second extending column: 352e, 652e first fluting: 317,617
Second fluting: 318,618 circuit boards: 4,7
The first insulation lid: 51,81 second insulation lids: 52,82
Fin: 51a, 52a, 81a, 82a, 613c, 614c, 661b
Recess: 615c, 616c
Embodiment
Some exemplary embodiments that embody characteristic of the present invention and advantage will be described in detail in the explanation of back segment.Be understood that the present invention can have various variations different in form, its neither departing from the scope of the present invention, and explanation wherein and accompanying drawing be used as the usefulness of explanation in itself, but not in order to restriction the present invention.
See also Fig. 3 A and Fig. 3 B; It shows the bottom surface and the Facad structure exploded view of transformer of the tool leakage inductance of preferred embodiment of the present invention; As shown in the figure, the transformer 3 of tool leakage inductance of the present invention comprises winding base 31, elementary coiling 32, first secondary winding 33, second subprime coiling 34 and magnetic core set 35.Wherein, winding base 31 comprises elementary winding section 36, first secondary winding portion 37, second subprime winding section 38 and penetrating via 39, and the bottom surface 311 of winding base 31 has one first through hole 312, and this first through hole 312 is connected with penetrating via 39.Elementary coiling 32 is set around the elementary winding section 36 of winding base 31, and first secondary winding 33 and second subprime coiling 34 are set around the first secondary winding portion 37 and the second subprime winding section 38 of winding base 31 respectively.Magnetic core set 35 at least partly is arranged at the penetrating via 39 of winding base 31; And comprise first magnetic core component 351 and second magnetic core component 352; Wherein second magnetic core component 352 has one first extending column 352a; This first extending column 352a is arranged in first through hole 312 of bottom surface 311 of winding base 31; To utilize the formed collateral branch of the first extending column 352a magnetic circuit of first magnetic core component 351 and second magnetic core component, the 352 formed main magnetic circuits and second magnetic core component 352, increase and the adjustment leakage inductance.
In this embodiment, the elementary winding section 36 of winding base 31, first secondary winding portion 37 and second subprime winding section 38 are one-body molded and constitute by insulating material.The elementary winding section 36 of winding base 31 is arranged at winding base 31 zone, stage casing in fact, and can be separated into a plurality of winding slots 362 by one or more demarcation strips 361.Each demarcation strip 361 has one or more grooves 363, and this groove 363 can supply elementary coiling 32 to be striden around to adjacent winding slot 362 by a winding slot 362.
The first secondary winding portion 37 and the second subprime winding section 38 of winding base 31 are arranged at the two opposite sides of winding base 31 respectively, that is are arranged at the two opposite sides of elementary winding section 36.The first secondary winding portion 37 of winding base 31 separates with first barricade 313 with elementary winding section 36; Separate with second barricade 314 with elementary winding section 36 the second subprime winding section 38 of winding base 31, can make elementary coiling 32 and first secondary winding 33 and elementary coiling 32 and 34 maintenances of second subprime coiling electrical safety distance respectively through first barricade 313 and second barricade 314.The first secondary winding portion 37 of winding base 31 and second subprime winding section 38 have one first side wall 315 and one second side wall 316 respectively.Have one or more demarcation strips 371,381 in the first secondary winding portion 37 of winding base 31 and the second subprime winding section 38 respectively; Respectively first secondary winding portion 37 and second subprime winding section 38 are separated into a plurality of winding slots 372,382; Wherein pass through the voltage divider principle of winding slot 372,382; Height according to working voltage is provided with demarcation strip 371,381, can determine the quantity of winding slot 372,382.Each demarcation strip 371,381 has one or more grooves 373,383, and this groove 373,383 can supply the coiling 34 of first secondary winding 33 and second subprime to be striden around to adjacent winding slot 372,382 by a winding slot 372,382 respectively.
In this embodiment, first through hole 312 of winding base 31 is extended to penetrating via 39 by the bottom surface 311 of winding base 31 and is connected.First through hole 312 is preferably and is arranged in first barricade 313.In addition, winding base 31 also can comprise one second through hole 319, and this second through hole 319 is extended to penetrating via 39 by the bottom surface 311 of winding base 31 and is connected, and this second through hole 319 is preferably and is arranged in second barricade 314.In addition; Winding base 31 also can comprise one first fluting, 317 and 1 second fluting 318; It is extended to the two ends of penetrating via 39 by the bottom surface 311 of winding base 31 respectively and is connected; Wherein first fluting 317 is preferably and is arranged in first side wall 315, and second fluting 318 is preferably and is arranged in second side wall 316.
In this embodiment, first barricade 313 of winding base 31, second barricade 314, first side wall 315, second side wall 316 and demarcation strip 361 comprise one or more connecting seat 313a, 313b, 314a, 314b, 315a, 315b, 316a, 316b, 361a respectively.The bottom surface 311 of winding base 31 is provided with a plurality of pins 310, L type pin for example, in order to transplanting on a circuit board (not shown).A plurality of pins 310 are inserted in connecting seat 313a, 313b, 314a, 314b, 315a, 315b, 316a, 316b, the 361a of winding base 31; And each pin 310 comprises the first connecting portion 310a and the second connecting portion 310b that vertically and respectively protrudes in two adjacent side of connecting seat 313a, 313b, 314a, 314b, 315a, 315b, 316a, 316b, 361a substantially each other; Wherein pin 310 winds the line through the first connecting portion 310a and elementary coiling 32, first secondary winding 33 or second subprime and 34 is connected, the second connecting portion 310b of pin 310 then transplanting in the guide hole (not shown) of circuit board.The first connecting portion 310a and the second connecting portion 310b can be by conductive material, and for example metal such as copper, aluminium forms L type leg structure through bending.
In this embodiment, first magnetic core component 351 of magnetic core set 35 can be but is not limited to plate shaped magnetic core component.First magnetic core component 351 is arranged in the penetrating via 39 of winding base 31.Second magnetic core component 352 comprises flat part 352b, the first lateral column 352c, the second lateral column 352d, the first extending column 352a and the second extending column 352e; Wherein the first lateral column 352c and the second lateral column 352d are positioned at the both ends of flat part 352b, and substantially perpendicular to flat part 352b.The first extending column 352a and the second extending column 352e are arranged between the first lateral column 352c and the second lateral column 352d, and substantially perpendicular to flat part 352b.In some embodiment, first lateral column 352c of second magnetic core component 352 and the sectional area of the second lateral column 352d are respectively greater than the sectional area of the first extending column 352a and the second extending column 352e.The first lateral column 352c is arranged in first fluting 317 of the bottom surface 311 of winding base 31, and contacts with the first end 351a of first magnetic core component 351.The second lateral column 352d is arranged in second fluting 318 of the bottom surface 311 of winding base 31, and contacts with the second end 351b of first magnetic core component 351.The first extending column 352a and the second extending column 352e are arranged in first through hole 312 and second through hole 319, and form a gap with first magnetic core component 351 respectively.
Fig. 4 shows the structural representation that is arranged at a circuit board after the transformer combination of tool leakage inductance shown in Fig. 3 A and Fig. 3 B.Fig. 5 is the part-structure sectional view of Fig. 4.Like Fig. 3 A, Fig. 3 B, Fig. 4 and shown in Figure 5, the transformer 3 of tool leakage inductance of the present invention is arranged on the circuit board 4, and wherein this circuit board 4 comprises the power supply circuit that drives fluorescent tube.The elementary winding section 36 of winding base 31, first secondary winding portion 37 and second subprime winding section 38 be the elementary coiling of windings 32, first secondary winding 33 and second subprime coiling 34 respectively.The two ends of elementary coiling 32 are connected to different pins 310.The two ends of first secondary winding 33 are connected to different pins 310, and the two ends of second subprime coiling 34 are connected to different pins 310.First magnetic core component 351 of magnetic core set 35 is arranged in the penetrating via 39 of winding base 31; 352 of second magnetic core components are arranged at the bottom surface 311 of winding base 31; And the flat part 352b of second magnetic core component 352 is between the bottom surface 311 and circuit board 4 of winding base 31; The first lateral column 352c is arranged in first fluting 317 of the bottom surface 311 of winding base 31; And contact with the first end 351a of first magnetic core component 351, the second lateral column 352d is arranged in second fluting 318 of the bottom surface 311 of winding base 31, and contacts with the second end 351b of first magnetic core component 351.The first extending column 352a and the second extending column 352e are arranged in first through hole 312 and second through hole 319, and form a gap with first magnetic core component 351 respectively.
When applying a voltage in elementary coiling 32, when making an electric current flow into elementary coiling 32, elementary coiling 32 produces magnetic flux then, makes first secondary winding 33 and second subprime coiling 34 produce induced voltage and induced current respectively.The main flux that elementary coiling 32, first secondary winding 33 and second subprime coiling 34 are produced is looped around between first magnetic core component 351 and second magnetic core component 352 of magnetic core set 35.The magnetic line of force direction of magnetic flux is moved toward the direction of first magnetic core component 351 by the first lateral column 352c, flat part 352b, the second lateral column 352d of second magnetic core component 352, gets back to second magnetic core component 352 at last.Because the first extending column 352a of second magnetic core component and the second extending column 352e are disposed at respectively between elementary coiling 32 and first secondary winding 33 and the second subprime coiling 34; That is be arranged in first through hole 312 and second through hole 319; And keep a gap with first magnetic core component 351 that is arranged in the penetrating via 39; The first extending column 352a capable of using thus and the second extending column 352e form collateral branch's magnetic circuit, to increase and the adjustment leakage inductance.Under leakage inductance increase and adjustable situation, just applicable to various resonant circuits.In addition; Because second magnetic core component 352 is arranged at the bottom surface 311 of winding base 31; That is between the bottom surface 311 and circuit board 4 of winding base 31, so the magnetic circuit of transformer and electromagnetic action relatively more can be to electronic building brick contiguous on the circuit board 4 and circuit generation electromagnetic interference or influences.
Fig. 6 A and Fig. 6 B show transformer device structure shown in Fig. 3 A and Fig. 3 B is isolated secondary rolling thread and magnetic core component with the insulation lid structural representation and sectional view.Shown in Fig. 6 A and Fig. 6 B, the transformer 3 of tool leakage inductance of the present invention also comprises one or more insulation lids 51,52, in order to cover the first secondary winding portion 37 and/or the second subprime winding section 38 of part at least.In present embodiment; The transformer 3 of tool leakage inductance of the present invention can further be sheathed on the bottom surface 311 of the first insulation lid 51 by insulating base 31 in the first secondary winding portion 37 of insulating base 31 after elementary coiling 32, first secondary winding 33, second subprime coiling 34 are set around winding base 31.In some embodiment; The winding slot 372 that the fin 51a on the inner surface of the first insulation lid 51 and the demarcation strip of first secondary winding portion 37 are 371 fastens; The first insulation lid 51 can be fixed on the winding base 31 thus, and is covered in first winding section 37 and first secondary winding 33 at least in part.Similarly; The transformer 3 of tool leakage inductance of the present invention can further be sheathed on the bottom surface 311 of the second insulation lid 52 by insulating base 31 on the second subprime winding section 38 of insulating base 31 after elementary coiling 32, first secondary winding 33, second subprime coiling 34 are set around winding base 31.In some embodiment; The winding slot 382 that the fin 52a on the inner surface of the second insulation lid 52 and the demarcation strip of second subprime winding section 38 are 381 fastens; The second insulation lid 52 can be fixed on the winding base 31 thus, and is covered in second winding section 38 and second subprime coiling 34 at least in part.
In present embodiment; After lid 52 that the first insulation lid 51 and second is insulated is sheathed on winding base 31; First magnetic core component 351 of magnetic core set 35 can be arranged in the penetrating via 39 of winding base 31, and second magnetic core component 352 can be arranged at the bottom surface 311 of winding base 31.Wherein, the flat part 352b of second magnetic core component 352 is between the bottom surface 311 and circuit board 4 of winding base 31.The first lateral column 352c is arranged in first fluting 317 of the bottom surface 311 of winding base 31, and contacts with the first end 351a of first magnetic core component 351.The second lateral column 352d is arranged in second fluting 318 of the bottom surface 311 of winding base 31, and contacts with the second end 351b of first magnetic core component 351.The first extending column 352a and the second extending column 352e are arranged in first through hole 312 and second through hole 319, and form a gap with first magnetic core component 351 respectively.Between the first secondary winding 33 that the first insulation lid 51 is arranged at first secondary winding portion 37 and second magnetic core component 352 of magnetic core set 35, so make second magnetic core component 352 and 33 of first secondary windings have enough electrical safety distances.Similarly, between the second subprime coiling 34 that the second insulation lid 52 is arranged at second subprime winding section 38 and second magnetic core component 352 of magnetic core set 35, second magnetic core component 352 and second subprime are wound the line 34 have enough electrical safety distances.
See also Fig. 7 A and Fig. 7 B; It shows the bottom surface and the Facad structure exploded view of transformer of the tool leakage inductance of another preferred embodiment of the present invention; As shown in the figure, the transformer 6 of tool leakage inductance of the present invention comprises winding base 61, the first elementary coiling 62a, the second elementary coiling 62b, first secondary winding 63, second subprime coiling 64 and magnetic core set 65.Wherein, Winding base 61 comprises the first elementary winding section 66a, the second elementary winding section 66b, first secondary winding portion 67, second subprime winding section 68 and penetrating via 69; And the bottom surface 611 of winding base 61 has one first through hole 612, and this first through hole 612 is connected with penetrating via 69.The first elementary coiling 62a and the second elementary coiling 62b are set around the first elementary winding section 66a and the second elementary winding section 66b of winding base 61 respectively, and first secondary winding 63 and second subprime coiling 64 are set around the first secondary winding portion 67 and the second subprime winding section 68 of winding base 61 respectively.Magnetic core set 65 at least partly is arranged at the penetrating via 69 of winding base 61; And comprise first magnetic core component 651 and second magnetic core component 652; Wherein second magnetic core component 652 has one first extending column 652a; This first extending column 652a is arranged in first through hole 612 of bottom surface 611 of winding base 61; To utilize the formed collateral branch of the first extending column 652a magnetic circuit of first magnetic core component 651 and second magnetic core component, the 652 formed main magnetic circuits and second magnetic core component 652, increase and the adjustment leakage inductance.
In this embodiment, the first elementary winding section 66a of winding base 61, the second elementary winding section 66b, first secondary winding portion 67 and second subprime winding section 68 are one-body molded and constitute by insulating material.The first elementary winding section 66a of winding base 61 and the second elementary winding section 66b are arranged at winding base 61 zone, stage casing in fact, and separate with demarcation strip 661.The first secondary winding portion 67 and the second subprime winding section 68 of winding base 61 are arranged at the two opposite sides of winding base 61 respectively, that is are arranged at the two opposite sides of the first elementary winding section 66a and the second elementary winding section 66b.The first secondary winding portion 67 of winding base 61 and the first elementary winding section 66a separate with first barricade 613; The second subprime winding section 68 of winding base 61 and the second elementary winding section 66b separate with second barricade 614, can make the first elementary coiling 62a and first secondary winding 63 and the second elementary coiling 62b and 64 maintenances of second subprime coiling electrical safety distance respectively through first barricade 613 and second barricade 614.The first secondary winding portion 67 of winding base 61 and second subprime winding section 68 have one first side wall 615 and one second side wall 616 respectively.Have one or more demarcation strips 671,681 in the first secondary winding portion 67 of winding base 61 and the second subprime winding section 68 respectively; Respectively first secondary winding portion 67 and second subprime winding section 68 are separated into a plurality of winding slots 672,682; Wherein pass through the voltage divider principle of winding slot 672,682; Height according to working voltage is provided with demarcation strip 671,681, can determine the quantity of winding slot 672,682.Each demarcation strip 671,681 has one or more grooves 673,683, and this groove 673,683 can supply the coiling 64 of first secondary winding 63 and second subprime to be striden around to adjacent winding slot 672,682 by a winding slot 672,682 respectively.In some embodiment, the winding slot 672,682 on a winding slot 672,682 on the demarcation strip 671,681 and the adjacent separator plates 671,681 shifts to install, that is non-adjacent setting, can be convenient to winding operation thus and avoid the coiling wearing and tearing.
In some embodiment, have fin 613c on first barricade 613 between the first secondary winding portion 67 of winding base 61 and the first elementary winding section 66a, can be in order to increase the creepage distance of 63 of the first elementary coiling 62a and first secondary windings.Similarly, have fin 614c on second barricade 614 between the second subprime winding section 68 of winding base 61 and the second elementary winding section 66b, can be in order to increase the creepage distance of 64 of the second elementary coiling 62b and second subprime coilings.In some embodiment, have fin 661b on first elementary winding section 66a of winding base 61 and the demarcation strip 661 between the second elementary winding section 66b, can be in order to increase the creepage distance between the first elementary coiling 62a and the second elementary coiling 62b.
In this embodiment, first through hole 612 of winding base 61 is extended to penetrating via 69 by the bottom surface 611 of winding base 61 and is connected.First through hole 612 is preferably and is arranged in first barricade 613.In addition, winding base 61 also can comprise one second through hole 619, and this second through hole 619 is extended to penetrating via 69 by the bottom surface 611 of winding base 61 and is connected, and this second through hole 619 is preferably and is arranged in second barricade 614.In addition; Winding base 61 also can comprise one first fluting, 617 and 1 second fluting 618; It is extended to the two ends of penetrating via 69 by the bottom surface 611 of winding base 61 respectively and is connected; Wherein first fluting 617 is preferably and is arranged in first side wall 615, and second fluting 618 is preferably and is arranged in second side wall 616.
In this embodiment, first barricade 613 of winding base 61, second barricade 614, first side wall 615, second side wall 616 and demarcation strip 661 comprise one or more connecting seat 613a, 613b, 614a, 614b, 615a, 615b, 616a, 616b, 661a respectively.The bottom surface 611 of winding base 61 is provided with a plurality of pins 610, L type pin for example, in order to transplanting on a circuit board (not shown).A plurality of pins 610 are inserted in connecting seat 613a, 613b, 614a, 614b, 615a, 615b, 616a, 616b, the 661a of winding base 61; And each pin 610 comprises the first connecting portion 610a and the second connecting portion 610b that vertically and respectively protrudes in two adjacent side of connecting seat 613a, 613b, 614a, 614b, 615a, 615b, 616a, 616b, 661a substantially each other; Wherein pin 610 winds the line through the first connecting portion 610a and the first elementary coiling 62a, the second elementary coiling 62b, first secondary winding 63 or second subprime and 64 is connected, the second connecting portion 610b of pin 610 then transplanting in the guide hole (not shown) of circuit board.The first connecting portion 610a and the second connecting portion 610b can be by conductive material, and for example metal such as copper, aluminium forms L type leg structure through bending.
In this embodiment, first magnetic core component 651 of magnetic core set 65 can be but is not limited to plate shaped magnetic core component.First magnetic core component 651 is arranged in the penetrating via 69 of winding base 61.Second magnetic core component 652 comprises flat part 652b, the first lateral column 652c, the second lateral column 652d, the first extending column 652a and the second extending column 652e; Wherein the first lateral column 652c and the second lateral column 652d are positioned at the both ends of flat part 652b, and substantially perpendicular to flat part 652b.The first extending column 652a and the second extending column 652e are arranged between the first lateral column 652c and the second lateral column 652d, and substantially perpendicular to flat part 652b.In some embodiment, first lateral column 652c of second magnetic core component 652 and the sectional area of the second lateral column 652d are respectively greater than the sectional area of the first extending column 652a and the second extending column 652e.The first lateral column 652c is arranged in first fluting 617 of the bottom surface 611 of winding base 61, and contacts with the first end 651a of first magnetic core component 651.The second lateral column 652d is arranged in second fluting 618 of the bottom surface 611 of winding base 61, and contacts with the second end 651b of first magnetic core component 651.The first extending column 652a and the second extending column 652e are arranged in first through hole 612 and second through hole 619, and form a gap with first magnetic core component 651 respectively.
In some embodiment; Form a recess 615c, 616c respectively on first side wall 615 of the two opposite sides of winding base 61 and second side wall 616; After first magnetic core component 651 of magnetic core set 65 and second magnetic core component 652 were arranged at winding base 61, anchor clamps capable of using (not shown) were fixed in winding base 61 through this recess 615c, 616c with magnetic core set 65 thus.Certainly, in some embodiment, adhesive agent also capable of using or insulating tape are fixed in winding base 61 with magnetic core set 65.
Fig. 8 shows the structural representation that is arranged at a circuit board after the transformer combination of tool leakage inductance shown in Fig. 7 A and Fig. 7 B.Fig. 9 is the part-structure sectional view of Fig. 8.Like Fig. 7 A, Fig. 7 B, Fig. 8 and shown in Figure 9, the transformer 6 of tool leakage inductance of the present invention is arranged on the circuit board 7, and wherein this circuit board 7 comprises the power supply circuit that drives fluorescent tube.The first elementary winding section 66a of winding base 61, the second elementary winding section 66b, first secondary winding portion 67 and second subprime winding section 68 be the winding first elementary coiling 62a, the second elementary coiling 62b, first secondary winding 63 and second subprime coiling 64 respectively.The two ends of the first elementary coiling 62a are connected to different pins 610.The two ends of the second elementary coiling 62b are connected to different pins 610.The two ends of first secondary winding 63 are connected to different pins 610, and the two ends of second subprime coiling 64 are connected to different pins 610.First magnetic core component 651 of magnetic core set 65 is arranged in the penetrating via 69 of winding base 61; 652 of second magnetic core components are arranged at the bottom surface 611 of winding base 61; And the flat part 652b of second magnetic core component 652 is between the bottom surface 611 and circuit board 7 of winding base 61; The first lateral column 652c is arranged in first fluting 617 of the bottom surface 611 of winding base 61; And contact with the first end 651a of first magnetic core component 651, the second lateral column 652d is arranged in second fluting 618 of the bottom surface 611 of winding base 61, and contacts with the second end 651b of first magnetic core component 651.The first extending column 652a and the second extending column 652e are arranged in first through hole 612 and second through hole 619, and form a gap with first magnetic core component 651 respectively.Because the framework of the transformer 6 of the tool leakage inductance of present embodiment is similar with principle with the framework of the transformer 3 of the tool leakage inductance shown in Fig. 3 A and Fig. 3 B with principle, repeats no more in this.
Figure 10 A and Figure 10 B show transformer device structure shown in Fig. 7 A and Fig. 7 B is isolated secondary rolling thread and magnetic core component with the insulation lid structural representation and sectional view.Shown in Figure 10 A and Figure 10 B, the transformer 6 of tool leakage inductance of the present invention also comprises one or more insulation lids 81,82, in order to cover the first secondary winding portion 87 and/or the second subprime winding section 88 of part at least.In present embodiment; The transformer 6 of tool leakage inductance of the present invention can further be sheathed on the bottom surface 611 of the first insulation lid 81 by insulating base 61 in the first secondary winding portion 67 of insulating base 61 after the first elementary coiling 62a, the second elementary coiling 62b, first secondary winding 63, second subprime coiling 64 are set around winding base 61.In some embodiment; The winding slot 672 that the fin 81a on the inner surface of the first insulation lid 81 and the demarcation strip of first secondary winding portion 67 are 671 fastens; The first insulation lid 81 can be fixed on the winding base 61 thus, and is covered in first winding section 67 and first secondary winding 63 at least in part.Similarly; The transformer 6 of tool leakage inductance of the present invention can further be sheathed on the bottom surface 611 of the second insulation lid 82 by insulating base 61 on the second subprime winding section 68 of insulating base 61 after the first elementary coiling 62a, the second elementary coiling 62b, first secondary winding 63, second subprime coiling 64 are set around winding base 61.In some embodiment; The winding slot 682 that the fin 82a on the inner surface of the second insulation lid 82 and the demarcation strip of second subprime winding section 68 are 681 fastens; The second insulation lid 82 can be fixed on the winding base 61 thus, and is covered in second winding section 68 and second subprime coiling 64 at least in part.Because the framework of the first insulation lid 81 and the second insulation lid 82 is similar with principle with the framework of the insulation lid 51 of first shown in Fig. 6 A and Fig. 6 B and the second insulation lid 52 with principle, repeats no more in this.
In sum; The transformer device structure of tool leakage inductance of the present invention is disposed between elementary coiling and the secondary rolling thread through the extending column of second magnetic core component; That is be arranged in the through hole; And keep a gap with the magnetic core component that is arranged in the penetrating via, extending column capable of using thus forms collateral branch's magnetic circuit, to increase or the adjustment leakage inductance.Under leakage inductance increase and adjustable situation, just applicable to various resonant circuits.In addition, because magnetic core component is arranged at the bottom surface of winding base, that is between the bottom surface and circuit board of winding base, so the magnetic circuit of transformer and electromagnetic action relatively more can be to electronic building brick contiguous on the circuit board and circuit generation electromagnetic interference or influences.
The present invention can carry out various modifications by those skilled in the art, however neither disengaging appended claims institute restricted portion.
Claims (18)
1. transformer device structure with leakage inductance comprises:
Winding base; Comprise elementary winding section, first secondary winding portion, second subprime winding section and penetrating via; Wherein this first secondary winding portion and this second subprime winding section have first side wall and second side wall respectively; The bottom surface of this winding base has first through hole, second through hole, first fluting and second fluting, and this first through hole and this second through hole are connected with this penetrating via, and slot respectively this bottom surface by this winding base of this first fluting and this second extends to the two ends of this penetrating via and is connected; And this first fluting is arranged in this first side wall, and this second fluting is arranged in this second side wall;
Elementary coiling is set around this elementary winding section;
First secondary winding and second subprime coiling are set around this first secondary winding portion and this second subprime winding section respectively; And
Magnetic core set; At least part is arranged at this penetrating via of this winding base; And comprise first magnetic core component and second magnetic core component; Wherein this second magnetic core component has first extending column, second extending column, first lateral column and second lateral column, and this first extending column and this second extending column are arranged in this first through hole and this second through hole of this bottom surface of this winding base, and forms the gap with this first magnetic core component respectively; This first lateral column is arranged in this first fluting of this bottom surface of this winding base; And contact with the first end of this first magnetic core component, this second lateral column is arranged in this second fluting of this bottom surface of this winding base, and contacts with the second end of this first magnetic core component.
2. the transformer device structure with leakage inductance as claimed in claim 1, wherein this elementary winding section of this winding base, this first secondary winding portion and this second subprime winding section constitute by insulating material is one-body molded.
3. the transformer device structure with leakage inductance as claimed in claim 1, wherein this elementary winding section is arranged at this zone, winding base stage casing, and is separated into a plurality of winding slots by at least one demarcation strip.
4. the transformer device structure with leakage inductance as claimed in claim 3, wherein this demarcation strip has at least one groove.
5. the transformer device structure with leakage inductance as claimed in claim 1, wherein this first secondary winding portion and this second subprime winding section are arranged at the two opposite sides of this elementary winding section respectively.
6. the transformer device structure with leakage inductance as claimed in claim 1; Wherein has at least one demarcation strip respectively in this first secondary winding portion and this second subprime winding section, respectively this first secondary winding portion and this second subprime winding section are separated into a plurality of winding slots.
7. the transformer device structure with leakage inductance as claimed in claim 6, wherein this demarcation strip has at least one groove.
8. the transformer device structure with leakage inductance as claimed in claim 1; Wherein this winding base also comprises first barricade and second barricade; This first secondary winding portion separates with this first barricade with this elementary winding section, and separate with this second barricade with this elementary winding section this second subprime winding section.
9. the transformer device structure with leakage inductance as claimed in claim 8, wherein this first through hole of this winding base is extended to this penetrating via by this bottom surface of this winding base and is connected, and this first through hole is arranged in this first barricade.
10. the transformer device structure with leakage inductance as claimed in claim 9, wherein this second through hole is arranged in this second barricade.
11. the transformer device structure with leakage inductance as claimed in claim 10; Wherein this second magnetic core component also comprises flat part; Wherein this first lateral column and this second lateral column are positioned at the both ends of this flat part; And substantially perpendicular to this flat part, and this first extending column and this second extending column be arranged between this first lateral column and this second lateral column, and substantially perpendicular to this flat part.
12. the transformer device structure with leakage inductance as claimed in claim 11, wherein the sectional area of this first lateral column of this second magnetic core component and this second lateral column is respectively greater than the sectional area of this first extending column and this second extending column.
13. the transformer device structure with leakage inductance as claimed in claim 10, wherein this first barricade of this winding base, this second barricade, this first side wall, this second side wall comprise connecting seat respectively.
14. the transformer device structure with leakage inductance as claimed in claim 13, wherein this connecting seat of this winding base is provided with a plurality of pins, and each pin comprises first connecting portion and second connecting portion.
15. the transformer device structure with leakage inductance as claimed in claim 1, wherein this first magnetic core component of this magnetic core set is plate shaped, and this first magnetic core component is arranged in this penetrating via of this winding base.
16. the transformer device structure with leakage inductance as claimed in claim 1, wherein this winding base is arranged on the circuit board, and this second magnetic core component is arranged between this bottom surface and this circuit board of this winding base.
17. the transformer device structure with leakage inductance as claimed in claim 1 also comprises:
The first insulation lid is arranged in this first secondary winding portion of this winding base and between this second magnetic core component of this first secondary winding and this magnetic core set, in order to cover this first secondary winding portion and this first secondary winding of part at least; And
The second insulation lid is arranged on this second subprime winding section of this winding base, and between this second magnetic core component of this second subprime coiling and this magnetic core set, in order to cover this second subprime winding section and the coiling of this second subprime of part at least.
18. the transformer device structure with leakage inductance comprises:
Winding base; Comprise the first elementary winding section, the second elementary winding section, first secondary winding portion, second subprime winding section and penetrating via; Wherein this first secondary winding portion and this second subprime winding section have first side wall and second side wall respectively; The bottom surface of this winding base has first through hole, second through hole, first fluting and second fluting, this first through hole with and this this penetrating via of second through hole be connected, slot respectively this bottom surface by this winding base of this first fluting and this second extends to the two ends of this penetrating via and is connected; And this first fluting is arranged in this first side wall, and this second fluting is arranged in this second side wall;
The first elementary coiling and one second elementary coiling are set around this first elementary winding section and this second elementary winding section respectively;
First secondary winding and second subprime coiling are set around this first secondary winding portion and this second subprime winding section respectively; And
Magnetic core set; At least part is arranged at this penetrating via of this winding base; And comprise first magnetic core component and second magnetic core component; Wherein this second magnetic core component has first extending column, second extending column, first lateral column and second lateral column, and this first extending column and this second extending column are arranged in this first through hole and this second through hole of this bottom surface of this winding base, and forms the gap with this first magnetic core component respectively; This first lateral column is arranged in this first fluting of this bottom surface of this winding base; And contact with the first end of this first magnetic core component, this second lateral column is arranged in this second fluting of this bottom surface of this winding base, and contacts with the second end of this first magnetic core component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910133087 CN101859638B (en) | 2009-04-07 | 2009-04-07 | Transformer structure with leakage inductance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910133087 CN101859638B (en) | 2009-04-07 | 2009-04-07 | Transformer structure with leakage inductance |
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| CN101859638A CN101859638A (en) | 2010-10-13 |
| CN101859638B true CN101859638B (en) | 2012-12-05 |
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| CN 200910133087 Expired - Fee Related CN101859638B (en) | 2009-04-07 | 2009-04-07 | Transformer structure with leakage inductance |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360822A (en) * | 2011-06-23 | 2012-02-22 | 武汉远光瑞康科技有限公司 | High-voltage transformer slotted winding skeleton |
| US9893536B2 (en) | 2012-05-15 | 2018-02-13 | Delta Electronics, Inc. | Electronic device |
| US9837198B2 (en) | 2012-05-15 | 2017-12-05 | Delta Electronics, Inc. | Electronic device |
| TWI493841B (en) * | 2012-05-15 | 2015-07-21 | Delta Electronics Inc | Converter |
| CN104143420B (en) * | 2014-08-08 | 2016-05-04 | 江苏晨朗电子集团有限公司 | Ultra-thin combined transformer |
| CN108231317A (en) * | 2016-12-21 | 2018-06-29 | 台达电子工业股份有限公司 | Magnet assembly and its magnetic core group |
| CN108831708A (en) * | 2018-07-31 | 2018-11-16 | 遂宁普思电子有限公司 | integrated LLC transformer |
| CN211788566U (en) * | 2020-03-30 | 2020-10-27 | 南京安盛电子有限公司 | Multi-winding-slot low-frequency transformer framework |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1601670A (en) | 2003-09-25 | 2005-03-30 | 胜美达集团株式会社 | Leakage transformer |
| CN101022054A (en) | 2006-02-14 | 2007-08-22 | 台达电子工业股份有限公司 | Transformer structure |
| CN200956306Y (en) | 2006-06-16 | 2007-10-03 | 台龙电子股份有限公司 | High-voltage high leakage inductance transformer structure |
| CN101261895A (en) | 2007-03-07 | 2008-09-10 | 台湾东电化股份有限公司 | Transformer structure |
-
2009
- 2009-04-07 CN CN 200910133087 patent/CN101859638B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1601670A (en) | 2003-09-25 | 2005-03-30 | 胜美达集团株式会社 | Leakage transformer |
| CN101022054A (en) | 2006-02-14 | 2007-08-22 | 台达电子工业股份有限公司 | Transformer structure |
| CN200956306Y (en) | 2006-06-16 | 2007-10-03 | 台龙电子股份有限公司 | High-voltage high leakage inductance transformer structure |
| CN101261895A (en) | 2007-03-07 | 2008-09-10 | 台湾东电化股份有限公司 | Transformer structure |
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