CN1307663C

CN1307663C - Transformer structure

Info

Publication number: CN1307663C
Application number: CNB031310273A
Authority: CN
Inventors: 薛景福; 徐万钦; 黄智鑫
Original assignee: Darfon Electronics Corp
Current assignee: Darfon Electronics Corp
Priority date: 2003-05-14
Filing date: 2003-05-14
Publication date: 2007-03-28
Anticipated expiration: 2023-05-14
Also published as: CN1549282A

Abstract

The present invention relates to a transformer structure. The present invention comprises an iron core, a first bobbin, a second bobbin, a primary side coil and a secondary side coil, wherein the first bobbin is sheathed on the outer side of the iron core; the second bobbin is sheathed on the outer side of the first bobbin; the secondary side coil is wound on the second bobbin; in addition, the primary side coil comprises a first coil segment and a second coil segment; the primary side coil is wound on the first bobbin; the second coil segment has lower coil density than the first coil segment.

Description

Transformer device structure

Technical field

The present invention relates to a kind of transformer device structure, particularly relate to a kind of different requirements, and can have the transformer device structure of suitable coupling at primary side and secondary side coiling coupling.

Background technology

At first see also Fig. 1, the schematic diagram of its expression one existing transformer.As shown in the figure, existing transformer 1 has two E font iron cores 12, wherein by with iron core 12 mutually and close and can form a closed magnetic path.In addition, existing transformer 1 has a bobbin 101, is provided with primary side winding region 101 and secondary side winding region 102 on bobbin 101; Again, bobbin 10 two ends have a plurality of metal pins 103, are wound in lead to a circuit board (not icon) on the winding region 101,102 in order to connection.

In Fig. 1, secondary side winding region 102 is provided with protuberance 11 with primary side winding region 101 junctions, and between a plurality of adjacent secondary side winding region 102 also in addition at interval by protuberance 11.Wherein, be separated out a plurality of secondary side winding regions 102 by 11 of protuberances, can avoid under the situation of twining multi-layer conductor leads, the lead of adjacent two layers produces arcing (arcing) phenomenon easily because of voltage difference is too high.

Yet, in above-mentioned existing transformer device structure, primary side winding region 101 and secondary side winding region 102 are positioned at the diverse location on the same bobbin 10, therefore wind the line to possess preferable coupling the time when primary side and secondary side, often be subjected to the limitation of spatial configuration or, preferable coupling arranged and can't possess apart from too far away.

In order to address the above problem, another existing transformer device structure is shown in Fig. 2 a, and transformer 2 comprises one first bobbin 21, one second bobbin 22 and two E font iron cores 23.In Fig. 2 a, first bobbin 21 is sheathed on iron core 23 outsides, and second bobbin 22 then is sheathed on aforementioned first bobbin 21 outsides.Wherein, on first bobbin 21, have pin 71, and on second bobbin 22, have pin 72, connect the lead that is wound on first bobbin 21 and second bobbin 22 respectively.Then see also Fig. 2 b and Fig. 2 c, in the foregoing existing transformer 2, primary side coiling 212 is curled up equably in first bobbin 21, and secondary side coiling 222 curls up equably in second bobbin 22, wherein also is provided with a plurality of protuberances 223 on second bobbin 22 to avoid arcing (arcing).

See also Fig. 2 d again, the bobbin combination back shown in its presentation graphs 2b, Fig. 2 c is along the cutaway view of X-X '.Wherein, existing transformer 2 curls up respectively in first bobbin 21, second bobbin 22 by primary side coiling 212 that will be positioned at the inboard equably and the secondary side coiling 222 that is positioned at the outside, make that not only distance is nearer between the first and second side coiling 212,222, and the overlapping area of coiling is bigger, therefore can have splendid coupling.

Though disclosed above-mentioned two kinds of transformer device structures that coupling is different in the prior art, yet in many practical applications, often still need look the transformer that its circuit characteristic that connects provides various different couplings, to improve its usefulness.

Summary of the invention

The object of the present invention is to provide a kind of can be at the requirement of primary side with the different couplings of secondary side winding department, and can adjust the transformer device structure of suitable coupling.

The object of the present invention is achieved like this, and a kind of transformer device structure promptly is provided, and comprises

One iron core;

One first bobbin is sheathed on this iron core outside, and this first bobbin has a plurality of primary side winding regions;

One second bobbin is sheathed on this first bobbin outside, and this second bobbin has a plurality of secondary side winding regions;

The coiling of one secondary side is curled up on this second bobbin;

One primary side coiling, order comprise one first coiling section, one second coiling section and one the 3rd coiling section, and wherein this first coiling section and the 3rd coiling section are implemented coiling, and this second coiling section is curled up on the primary side winding region in this first bobbin;

The coiling of one secondary side, order comprises one the 4th coiling section, one the 5th coiling section and one the 6th coiling section, the 4th coiling section, the 5th coiling section and the 6th coiling section are respectively on a plurality of secondary side winding regions of this second bobbin, and the 5th coiling section section has lower coiling density than the 4th coiling section and the 6th coiling;

Wherein, the position of this first coiling section is corresponding to the 4th coiling section, and the position of this second coiling section is corresponding to the 5th coiling section, and the position of the 3rd coiling section is corresponding to the 6th coiling section.

This first bobbin also comprises protuberance, in order to respectively at interval this first coiling section and this second coiling section and this second coiling section and the 3rd coiling section.

This first bobbin also comprises protuberance, in order to respectively at interval the 4th coiling section and the 5th coiling section and the 5th coiling section and the 6th coiling section.

By transformer device structure of the present invention, the visual circuit characteristic that it is connected is different and adjust the coupling of primary side and secondary side coiling group, so that a transformer with suitable coupling to be provided.

Description of drawings

Fig. 1 is the schematic diagram of an existing transformer device structure;

Fig. 2 a is the schematic diagram of another existing transformer device structure;

Fig. 2 b is the coiling worker method schematic diagram of first bobbin among Fig. 2 a;

Fig. 2 c is the coiling worker method schematic diagram of second bobbin among Fig. 2 a;

Fig. 2 d is the cutaway view of the bobbin combination back of Fig. 2 b and Fig. 2 c along X-X ';

Fig. 3 a is the coiling worker method schematic diagram of first bobbin of the present invention;

Fig. 3 b is the coiling worker method schematic diagram of second bobbin of the present invention;

Fig. 3 c is the cutaway view of the bobbin combination back of Fig. 3 a, Fig. 3 b along Y-Y ';

Fig. 4 is applied to the equivalent electric circuit of the supply circuit of light tube electric voltage more than for transformer device structure of the present invention.

Embodiment

The present invention is based on transformer 2 structures shown in the earlier figures 2a, design one can have the transformer of suitable coupling.At first see also Fig. 3 a, Fig. 3 b, this two figure represents the schematic diagram of first bobbin in the transformer device structure of the present invention and second bobbin coiling worker method respectively.Shown in Fig. 3 a, first bobbin 31 comprises a plurality of primary side winding region a, b, c, and the end of first bobbin 31 is provided with pin 311 again.Wherein, above-mentioned primary side winding region a, b, c are separated by a plurality of protuberances 313 on first bobbin 31.

Wherein, primary side coiling 312 connections are positioned at the pin at first bobbin, 31 two ends, and divide into three coiling sections 312a, 312b, 312c in regular turn, lay respectively in aforementioned primary side winding region a, b, the c.In particular, the coiling density difference of above-mentioned coiling section 312a, 312b, 312c, wherein coiling section 312a, a 312c do not implement coiling, and only have coiling section 312b in primary side winding region b inward turning on first bobbin 31.

See also Fig. 3 b again, second bobbin 32 includes a plurality of secondary side winding region a ', b ', c ' as shown in the figure, and the end of second bobbin 32 is provided with pin 321 again.Wherein, above-mentioned secondary side winding region a ', b ', c ' are separated by a plurality of protuberances 323 on second bobbin 32.

Shown in Fig. 3 b, secondary side coiling 322 connections are positioned at the pin at second bobbin, 32 two ends, and divide into three coiling sections 322a ', 322b ', 322c ' in regular turn.Wherein, above-mentioned coiling section 322a ', 322b ', 322c ' lay respectively in aforementioned secondary side winding region a ', b ', the c '.In particular, the coiling density difference of coiling section 322a ', 322b ', 322c ', wherein coiling section 322b ' has lower coiling density than coiling section 322a ', 322c '.

Then see also Fig. 3 c, the bobbin that the figure shows among Fig. 3 a, Fig. 3 b makes up the cutaway view of back along Y-Y '.Transformer 3 of the present invention by second bobbin 32 is sheathed on outside first bobbin 31, makes secondary side coiling section 322 be positioned at the outside of primary side coiling 312 when combination.As shown in the figure, the position of first bobbin, 31 last side winding region a, b, c corresponds respectively to secondary side winding region a ', b ', the c ' on second bobbin 32, and so feasible coiling section 312a, a 312b, 312c can be corresponding to aforementioned coiling section 322a ', 322b ', 322c '.

In sum, the present invention is by adjusting primary side coiling 312 and secondary side coiling 322, make it form coiling section (312a, 312b, 312c and 322a ', 322b ', 322c ') respectively with different coiling density, so can adjust and make primary side coiling 312 and the suitable coupling of secondary side coiling 322 generations, and provide specific circuit to use.Wherein, the coiling section of varying number still can be optionally divided in above-mentioned primary side coiling 312 and secondary side coiling 322, and requires to adjust the coiling density of each coiling section according to different couplings.So, can flexibly adjust the coupling of transformer by the present invention, and be widely used in the various circuit.

Illustrate, transformer device structure of the present invention can use in many light tube electric voltages supply circuit of LCD.As shown in Figure 4, transformer of the present invention 3 inside have an iron core 33 to form a closed magnetic path, and wherein primary side coiling 312 connects one drive circuit 100, and two independently

secondary side coilings

3221,3222, then distinctly are connected with fluorescent tube R1, R2.

Generally speaking, aforesaid drive circuit 100 can be existing Royer, MPS, circuit forms such as O2, Linfinity, and primary side coiling 312 also visual circuit need and be designed to the absolute coil of multistage.Wherein, when drive circuit 100 needs the relatively poor transformer of collocation one coupling (as MPS, O2, Linfinity circuit), can adjust the coiling density (reducing coiling density does not even wind the line) of a plurality of different coiling sections in primary side and the secondary side by the present invention, to reduce the coupling of primary side and secondary side winding department.Otherwise, when drive circuit 100 needs the preferable transformer of collocation one coupling (as the Royer circuit), also can be by design of the present invention, suitably adjust the coiling density (increasing coiling density and or increase coiling overlapping area) that makes the section that respectively winds the line, and make primary side and secondary side winding department can have preferable coupling.

In sum, the present invention can be according to the coupling requirement of primary side and secondary side coiling group, flexibly adjusts coiling density, and a transformer device structure with suitable coupling is provided thus.Compare with existing transformer, the present invention can flexibly have preferable or relatively poor coupling by adjusting coiling density, therefore more can use widely in the circuit of various different qualities, can improve its usefulness simultaneously.

Though disclosed the present invention in conjunction with a preferred embodiment; yet it is not in order to limit the present invention; any those skilled in the art can do a little and change and retouching, so protection scope of the present invention should be with being as the criterion that claim was defined without departing from the spirit and scope of the present invention.

Claims

1. a transformer device structure comprises

One iron core;

2. transformer device structure as claimed in claim 1, wherein this first bobbin also comprises protuberance, in order to respectively at interval this first coiling section and this second coiling section and this second coiling section and the 3rd coiling section.

3. transformer device structure as claimed in claim 1, wherein this second bobbin also comprises protuberance, in order to respectively at interval the 4th coiling section and the 5th coiling section and the 5th coiling section and the 6th coiling section.