CN101261895A - Transformer structure - Google Patents

Abstract

The present invention discloses a transformer structure, which comprises: a winding frame body, a magnetic core group and an insulating cover body, wherein a hollow channel is provided inside the winding frame body and the winding frame body comprises a middle winding area and two side winding areas, wherein at least one partition plate is provided between the middle winding area and the side winding area, and each side winding area comprises a plurality of convex ribs arranged at intervals and having notches, and at least one extension plate is provided on both sides of the winding frame body, and at least one conductive terminal is provided on the side of each partition plate and each extension plate, and a plurality of wire arrangement grooves are provided at the bottom thereof for guiding the coil, and the magnetic core group comprises an E-shaped magnetic core, and the central rod of the E-shaped magnetic core is provided for inserting the winding frame body. The present invention has many advantages such as reduced volume, high insulation, high safety, good impedance balance, reduced leakage inductance, simplified process, etc.

Description

Transformer structure

technical field

The invention relates to a transformer structure, in particular to an improved transformer structure which is flattened and has enhanced high-voltage insulation and heat dissipation.

Background technique

Press, the transformer is one of the important electronic components in electronic products. The main function of the transformer is to convert the driving voltage in the electronic circuit. Its types can be: a power transformer that reduces the voltage, a traditional or liquid crystal display. Transformers...and so on. Electronic product manufacturers select the corresponding transformer specifications or types according to the needs, and make the voltage conversion process stable and work efficient.

Early transformers mainly consisted of a winding frame and a primary coil and a secondary coil wound on the winding frame overlappingly. There were multiple primary pins on the winding frame for connecting the primary coil and multiple secondary pins for connecting the secondary coils. The secondary coil is then assembled on the bobbin by an iron core group. Since the primary coil and the secondary coil are overlapped and are only covered and isolated by insulating tape, it is easy to cause high leakage inductance and poor high-voltage insulation due to the quality of the insulating tape or poor assembly, and the heat dissipation effect is not good.

Later, someone proposed a transformer structure in which the primary coil and the secondary coil are wound separately on both sides of the winding frame, which solved some of the problems of the above structure. However, the transformer is gradually widely used in electronic products that require miniaturization, such as liquid crystal displays. On the driving circuit of the backlight module, therefore, the transformer not only requires high voltage conversion quality, but also needs to be reduced in size to maintain a good heat dissipation effect.

In addition, please refer to FIG. 7, which shows a schematic diagram of a conventional transformer 8 that separates the primary coil P (Primary) and the secondary coil S (Secondary). This type of transformer 8 does not need to be covered by a casing (not shown), and is Nickel-zinc material is used as the core group, which has the advantage of high insulation resistance. Among them, the number 81 represents the winding position of the primary coil, and the number 82 represents the position where the secondary coil is wound on both sides of the primary coil. However, because the primary coil and the secondary coil are wound The metal pin 83 outside the position 82 is connected, and the low-voltage end of the secondary coil is connected to the metal pin 84 located outside the position 81 of the primary coil. The wire may be too close to the coil, resulting in insufficient insulation resistance to cause discharge problems, and its overall manufacturing cost is also too high. Wherein, S(H) in the attached figure is the high voltage pin of the secondary side; S(L) is the low voltage pin of the secondary side.

In addition, please refer to Figure 8, which is a schematic diagram of another conventional transformer 9 structure, which uses cheaper manganese-zinc material as the core group and adopts a shell structure to improve safety, and the label 91 represents the winding of the primary coil P (Primary) The position, the label 92 represents the position where the secondary coil S (Secondary) is wound on both sides of the primary coil, however, because the two metal pins 93 connected to the primary coil and the two metal pins 94 connected to the high voltage end of the secondary coil are set at the same On the side of the coil position 91, there will be a problem of insufficient electrical safety regulations in the circuit configuration design. Wherein, S(H) in the attached figure is the high voltage pin of the secondary side; S(L) is the low voltage pin of the secondary side.

Contents of the invention

The technical problem to be solved by the present invention is to provide a transformer structure, which can be wound separately for the primary coil and the secondary coil, and has the advantages of small size and high stability.

Another object of the present invention is to provide a transformer structure with low manufacturing cost, high safety and good impedance balance.

In order to achieve the above object, the transformer structure of the present invention includes: a winding frame body, which includes a middle winding area located in the center and two side winding areas respectively arranged on both sides of the middle winding area for coil winding, At least one partition plate is provided between the middle winding area and the side winding area, and each side winding area includes a plurality of convex ribs arranged at intervals, and each convex rib is respectively provided with a gap, and the two sides of the winding frame body are respectively There is at least one extension plate, at least one conductive terminal is provided on the side of each partition plate and each extension plate, and at least one wire management groove is provided at the bottom for guiding the coil, and a hollow channel is provided inside the winding frame body ; and a magnetic core group, which is made of a magnetizable material, and part of the volume of the magnetic core group can be inserted into the hollow channel of the bobbin body.

The invention has the advantages of reduced volume, high insulation, high safety, good impedance balance, reduced electric leakage inductance, simplified process and many other advantages.

Description of drawings

Fig. 1 is the three-dimensional exploded view of the present invention;

Fig. 2 is the top view of the winding frame body of the present invention;

Fig. 3 is the sectional view of the A-A section line of the second figure;

Fig. 4 is the bottom view of the winding frame body of the present invention;

Fig. 5 is a side view of the bobbin body of the present invention;

Fig. 6 is the schematic diagram of the simplified structure of winding frame body of the present invention;

Fig. 7 is the schematic diagram of the simplified structure of conventional transformer;

FIG. 8 is a schematic diagram of a simplified structure of another conventional transformer.

Among them, reference signs:

1: Transformer 2: Winding frame body

21: Intermediate winding area 211: Central partition

22: Side winding area 221: Convex rib

222: Gap 23: Partition board

24: Hollow channel 25: Extension board

26: Conductive terminal 27: Wiring trough

3: Magnetic core group 31: E-shaped magnetic core

311: Central pole 312: Side pole

4: Insulation cover 41: Groove

42: Through hole 43: Side plate

44: Gap 8: Transformer

81: Primary coil winding position 82: Secondary coil winding position

83: metal pin 84: metal pin

9: Transformer 91: Primary coil winding position

92: Secondary coil winding position 93: Metal pin

94: metal pin

Detailed ways

In order to enable your review committee to further understand the technology, means and effects of the present invention to achieve the intended purpose, please refer to the following detailed description and accompanying drawings of the present invention. It is believed that the purpose, characteristics and characteristics of the present invention can be obtained from this To gain a deep and specific understanding, the attached drawings are only for reference and illustration, and are not intended to limit the present invention.

As shown in Figures 1 to 5, it is an embodiment of the transformer structure of the present invention, the transformer 1 includes a bobbin body 2, a magnetic core group 3 and an insulating cover 4, wherein the bobbin body 2 It includes an intermediate winding area 21 located in the middle and two side winding areas 22 for coils (not shown) to be wound. The center of the intermediate winding area 21 is provided with a ring-shaped central partition 211, and the side The winding area 22 is respectively arranged on both sides of the middle winding area 21, and the coils are wound on the two side winding areas 22 and used as the primary coil and the secondary coil respectively. Between the middle winding area 21 and the side winding area 22 there is There is at least one partition plate 23 , and a hollow channel 24 is axially provided inside the winding frame body 2 to penetrate the entire winding frame body 2 . The cross section of the hollow channel 24 is rectangular.

The side winding area 22 of the bobbin body 2 includes a plurality of protruding annular ribs 221 arranged at intervals. In this embodiment, each side winding area 22 has six ribs 221, and each rib 221 is respectively set There is a notch 222 , and the positions of the notches 222 are staggered with each other. At least one extension plate 25 is respectively provided on both sides of the bobbin body 2 .

At least one conductive terminal 26 is respectively provided on both sides of each partition plate 23 and each extension plate 25. In particular, the conductive terminals 26 partially fixed on the partition plate 23 or the extension plate 25 are J-shaped and one end is embedded and fixed. Bottoms of the board 23 and the extension board 25 are provided with at least one wire management slot 27 for coil wiring.

The magnetic core group 3 is made of a magnetizable material, such as iron, nickel zinc, manganese zinc or other suitable materials. Part of the volume of the magnetic core group 3 can be inserted into the hollow channel 24 of the bobbin body 2. In this embodiment, the The magnetic core group 3 is two E-shaped magnetic cores 31 with a central pole 311 and side poles 312 . The central pole 311 of the E-shaped magnetic core 31 can be aligned and inserted into the hollow channel 24 of the bobbin body 2 .

The insulating cover 4 is made of insulating material, and the middle position of the insulating cover 4 has an upwardly convex groove 41, which can be used to cover the upper half of the bobbin body 2. There are two sides of the groove 41 respectively. The through hole 42 corresponding to the hollow channel 24 of the bobbin body 2 is also rectangular. The front, rear and both sides of the insulating cover 4 are respectively provided with a plurality of side plates 43 at intervals. The gap between each side plate 43 44 is suitable for the conductive terminals 26 of the bobbin body 2 to be exposed.

During assembly, the coil will be wound on the middle winding area 21 and the side winding area 22 of the bobbin body 2 and properly connected to the conductive terminal 26, and then the insulating cover 4 will be covered on the upper half of the bobbin body 2 And expose the conductive terminals 26, and finally align the magnetic core group 3 with the through hole 41 of the insulating cover 4 and the openings at both ends of the hollow passage 24 and insert them to complete the assembly. The assembly is simple and fast; in addition to the above assembly methods, you can choose The assembly of the structure of the transformer 1 can be completed without using the insulating cover 4, that is, only by assembling the magnetic core group 3 on the bobbin body 2.

See also shown in Fig. 6, its simplified structure schematic diagram of the embodiment of the present invention, wherein the central partition 211 both sides of the intermediate winding area 21 of this bobbin body 2 is for primary coil P (Primary) winding, the intermediate winding area The four conductive terminals 26 on both sides of 21 are used for primary coil connection, the side winding area 22 is used for secondary coil S (Secondary) winding, and the conductive terminals 26 on both sides of extension plate 25 are used for secondary coil connection, as Low voltage side and high voltage side. Wherein, S(H) in the attached figure is the high voltage pin of the secondary side; S(L) is the low voltage pin of the secondary side.

Thereby, the structure of the present invention can make the coils neatly wound in the middle winding area 21 and the side winding area 22, and the coils are evenly separated by the central partition 211, the partition plate 23 and the convex rib 221, and the whole winding frame The body 2 can be designed with a rectangular cross-section to reduce the volume and height, and the magnetic core group 3 can be made of manganese-zinc material to reduce the manufacturing cost, and the installation of the insulating cover 4 can improve the safety of use, so the present invention has the advantages of reducing the volume , high insulation, high safety, good impedance balance, reduced electric leakage inductance, simplified process and many other advantages.

Certainly, the present invention also can have other various embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these Corresponding changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (6)

1. a transformer device structure is characterized in that, comprises:

One coiling support body, it comprises the side winding region that a middle winding region and two that is positioned at central authorities is located at middle winding region both sides respectively, twine for coil, be provided with at least one demarcation strip between this centre winding region and the side winding region, each side winding region comprises a plurality of spaced fins, each fin is respectively equipped with a breach, these coiling support body both sides are respectively equipped with at least one extension board, each demarcation strip and each extension board side are respectively equipped with at least one conducting terminal, and its bottom is respectively equipped with at least one trunking for the guiding coil, and coiling support body inside is provided with a hollow channel;

The insulation lid that one insulation material is made, the groove that position has an epirelief in the middle of it, for the first half that is covered in the coiling support body, these groove both sides have an open-work respectively, with corresponding with the hollow channel of coiling support body; And

One core sets, it is made by magnetisable material, and the partial volume of this core sets can insert the open-work of insulation lid and the hollow channel of coiling support body.

2. transformer device structure according to claim 1 is characterized in that, this core sets is two to have the E shape magnetic core of center rod and side lever, and the center rod of this E shape magnetic core is for the hollow channel that inserts the coiling support body.

3. transformer device structure according to claim 1 is characterized in that, the partially conductive terminal becomes the J font to be fixed in the coiling support body.

4. transformer device structure according to claim 1 is characterized in that, this core sets is made by nickel zinc material or MnZn material.

5. transformer device structure according to claim 1 is characterized in that the section of this hollow channel is rectangular.

6. transformer device structure according to claim 1 is characterized in that, this centre winding region be provided with one around central baffle use for separating coil.

Images