CN201126753Y - Transformer, primary side wire group thereof and lamp tube driving circuit - Google Patents

Abstract

The utility model discloses a transformer and a structure of a primary side wire group thereof, wherein the transformer comprises a magnetic core, a primary side wire group and a secondary side wire group, and the primary side wire group and the secondary side wire group are wound on the magnetic core; the primary side wire group is composed of a plurality of core wire units which are twisted with each other; the core wire unit can be a single core wire, and the primary side wire group is formed by mutually twisting two single core wires; the core wire unit can be a core wire bundle formed by twisting a plurality of core wires, and the primary side wire group is formed by mutually twisting two core wire bundles; the primary side wire group can be coated with a coating layer outside the core wire bundle, thereby overcoming the defect of overlarge difference of direct current impedance and inductance.

Description

Transformer and its primary side line group and lamp drive circuit

technical field

The utility model relates to a transformer and its primary side wire group structure and a lamp drive circuit, in particular to a primary side wire group composed of a plurality of mutually twisted core wire units, and a transformer with the primary side wire group .

Background technique

Please refer to a kind of existing transformer 10 shown in Fig. 1, it has a bobbin frame 11, and this bobbin frame 11 inside is used for setting magnetic core (not shown in the figure), and bobbin frame 11 outside is used for winding coil group ; The winding frame 11 includes a primary side winding area 111, a secondary side winding area 112, and a plurality of lead terminal groups 12, 13; as shown in the figure, the primary side winding area 111 is wound with a primary The side wire group 20, the secondary side winding area 112 is wound with a secondary side wire group 20a, the primary side wire group 20 is composed of two core wire units 21, 22, and the core wire unit 21 is marked with oblique lines here, To be different from another core wire unit 22.

As shown in Figure 2, first connect one end of the core wire units 21, 22 to the terminals 121, 122 respectively, then arrange the core wires 21, 22 side by side up and down, and wind them around the primary side from bottom to top and from inside to outside. In the winding area 111, the other ends of the core wires 21, 22 are connected to the terminals 124, 123 respectively at last, but because the position of the core wire unit 21 is always below the other core wire 22, the core wire units 21, 22 are paired. The difference in inductance and impedance of the core increases.

Utility model content

In view of the deficiencies in the prior art, the purpose of this utility model is to propose a structure of a transformer and its primary side line group, which can improve the lack of large differences in DC impedance and inductance of the traditional transformer primary side line group.

In order to achieve the above object, the utility model proposes a transformer, which includes:

a magnetic core;

a primary side wire group and a secondary side wire group, the primary side wire group and the secondary side wire group are wound on the magnetic core;

Wherein, the primary side wire group is composed of a plurality of mutually twisted core wire units.

Wherein the core wire unit is a single core wire, and the primary side wire group is formed by twisting two single core wires.

Wherein the core wire unit is a core wire bundle formed by twisting a plurality of core wires, and the primary side wire group is formed by twisting two core wire bundles with each other.

Wherein the core wire bundle is covered with a polyester or polyester composite sheathing layer.

In order to achieve the above purpose, the utility model further proposes a primary side wire group of a transformer, the primary side wire group is composed of a plurality of core wire units twisted with each other.

In order to achieve the above purpose, the utility model proposes a lamp drive circuit, including:

A transformer, comprising:

a magnetic core;

a primary side wire group and a secondary side wire group, the primary side wire group and the secondary side wire group are wound around the magnetic core;

Wherein, the primary side wire group is composed of a plurality of mutually twisted core wire units;

a light tube coupled to the secondary side set of the transformer; and

A control circuit is coupled with the primary side line set of the transformer.

Wherein the lamp tube is a discharge lamp tube, such as a cold cathode tube.

In order to achieve the above purpose, the utility model further proposes a primary side wire group of a transformer of a lamp driving circuit, the primary side wire group is composed of a plurality of core wire units twisted with each other.

The utility model has the advantage that since the core wire unit adopts single or multiple core wires, and the primary side wire group is formed by twisting two single core wires, it can improve the DC power of the traditional transformer primary side wire group. The absence of large differences in impedance and inductance.

In order to make your examining committee members have a further understanding and recognition of the structure, purpose and efficacy of the utility model, hereby cooperate with the illustrations to describe in detail as follows.

Description of drawings

Fig. 1 is the structural schematic diagram of existing transformer;

Fig. 2 is a structural schematic diagram of a winding primary side line group of an existing transformer;

Fig. 3 is a structural schematic diagram of a transformer embodiment of the present invention;

Fig. 4 is a structural schematic diagram of an embodiment of the primary side wire group of the present utility model;

Fig. 5 is a structural schematic diagram of another embodiment of the primary side wire group of the present utility model;

Fig. 6 is a partially enlarged view of the core wire bundle constituting the primary side wire group of the present invention;

Fig. 7 is a structural schematic diagram of another embodiment of the primary side wire group of the present utility model;

Fig. 8 is a circuit schematic diagram of the utility model implemented in a lamp tube driving circuit.

Description of main component symbols

The utility model:

10-transformer

11-winding frame

111-Primary side winding area

112-Secondary side winding area

12, 13-lead terminal set

121～124-terminal

20-a side line group

20a-Secondary side wire group

21, 22-core wire

The utility model:

30-transformer

31-winding frame

311-Primary side winding area

312-Secondary side winding area

32, 33-lead terminal set

321～324-terminal

40-Primary side line group

40a-secondary side wire group

41, 42-core wire

50-one side line group

51, 52-core wire harness

511, 512-core wire

60-Cladding

80 lamp drive circuit

81-transformer

811-Primary side line group

812-Secondary side wire group

82-lamp tube

83-Control circuit

Detailed ways

The technical means and effects used by the utility model to achieve the purpose will be described below with reference to the accompanying drawings, and the embodiments listed in the following drawings are only auxiliary explanations to facilitate the understanding of the review committee, but the technical means of this case It is not limited to the figures listed.

See also shown in Fig. 3, a kind of transformer 30 that the utility model proposes, it has a bobbin 31, and this bobbin 31 inside is used for setting magnetic core (not shown in the figure), and bobbin 31 exterior is used for To wind the coil group; the winding frame 31 includes a primary side winding area 311, a secondary side winding area 312, and a plurality of lead terminal groups 32, 33; as shown in the figure, the primary side winding area 311 is wound with a primary side wire group 40, the primary side wire group 40 is composed of two core wire units 41, 42, here the core wire is marked with a slash in 41 to distinguish it from the other core wire unit 42; It must be noted that the secondary side winding area 312 is wound with a secondary side wire group 40a, which is not repeated here because it has the same structure and function as the existing secondary side wire group.

As shown in Figure 4, the utility model is characterized in that the two core wire units 41, 42 of the primary side wire group 40 are twisted with each other, and the way it is wound in the primary side winding area 311, as shown in Figure 3, the core One ends of the wire units 41, 42 are respectively connected to the terminals 321, 322, and then the core wire units 41, 42 are wound around the primary winding area 311 from bottom to top and from the inside to the outside, and finally the core wires 41, The other ends of 42 are respectively connected to terminals 324, 323. Since the core wires 41, 42 are twisted with each other, during the winding process, the core wires 41, 42 are interlaced with the magnetic core, so there will be no difference in inductance or impedance In the same way, the same function can be achieved by twisting two or more core wires with each other. Please refer to the primary side wire group 50 shown in Figure 5, which is formed by twisting two core wire bundles 51, 52, and the core wire bundle 51, 52 is formed by twisting a plurality of core wires, as shown in Figure 6, the core wire bundle The partial enlarged view of 51 is formed by twisting two core wires 511, 512; similarly, the same function can also be achieved by twisting more than two core wires.

Please refer to the embodiment shown in Fig. 7, which is based on the primary side wire group 50 in Fig. 5, and the primary side wire group 50 is composed of two core wire units 51. Covered with a cladding layer 60, the cladding layer 60 is polyester or a polyester compound.

To sum up, the transformer and its primary side wire group provided by the utility model can improve the traditional The absence of large differences in the DC impedance and inductance of the primary side line group of the transformer can be implemented in the lamp drive circuit; 812, the lamp tube 82 can be a cold-cathode tube, and a control circuit 83 is coupled to the primary side line group 811 of the transformer 81. This type of lamp tube drive circuit 80 can be applied to drive the backlight source of the liquid crystal display panel, lighting equipment and other related fields. In addition, referring to Fig. 3, when the core wire units 41, 42 are coupled in parallel, they can form a so-called full bridge, half bridge circuit or Royal circuit with the control circuit; when the core wire units 41, 42 are coupled in series , it can form a so-called push-pull (pushpull) circuit with the control circuit.

Claims (16)

1. a transformer is characterized in that, comprises: magnetic core; Side line group and secondary side line group, this side line group and this secondary side line group are wrapped on this magnetic core; Wherein, this side line group is made of a plurality of stranded heart yearn unit mutually.

2. transformer as claimed in claim 1 is characterized in that, this heart yearn unit is single heart yearn, and this side line group is made of mutual two stranded heart yearns.

3. transformer as claimed in claim 1 is characterized in that, this heart yearn unit and heart yearn bundle of constituting stranded by many heart yearns, and this side line group is made of two strands of stranded heart yearn bundles mutually.

4. transformer as claimed in claim 1 is characterized in that, this side line group outside is coated with coating layer.

5. transformer as claimed in claim 4 is characterized in that, this coating layer is polyester or polyester complexes.

6. a transformer side line group is characterized in that, this side line group is made of mutual stranded a plurality of heart yearns unit.

7. transformer as claimed in claim 6 side line group is characterized in that, this heart yearn unit is single heart yearn, and this side line group is formed by mutual two stranded heart yearns.

8. transformer as claimed in claim 6 side line group is characterized in that, this heart yearn unit is by the many stranded heart yearn bundles that form of heart yearn, and this side line group is made of mutual two strands of stranded heart yearn bundles.

9. transformer as claimed in claim 8 side line group is characterized in that, this heart yearn bundle outside is coated with coating layer.

10. transformer as claimed in claim 9 side line group is characterized in that, this coating layer is polyester or polyester complexes.

11. a lamp tube drive circuit is characterized in that, comprising: transformer, this transformer comprises: magnetic core; Side line group and secondary side line group, this side line group and this secondary side line group are wrapped on this magnetic core; Wherein, this side line group is made of a plurality of stranded heart yearn unit mutually; Fluorescent tube couples with the secondary side line group of this transformer; And control circuit, couple with a side line group of this transformer.

12. lamp tube drive circuit as claimed in claim 11 is characterized in that, this fluorescent tube is the discharge electrode pipe.

13. lamp tube drive circuit as claimed in claim 11 is characterized in that, this heart yearn unit is single heart yearn, and this side line group is made of mutual two stranded heart yearns.

14. lamp tube drive circuit as claimed in claim 11 is characterized in that, this heart yearn unit is by the many stranded heart yearn bundles that form of heart yearn, and this side line group is made of mutual two stranded heart yearn bundles.

15. lamp tube drive circuit as claimed in claim 14 is characterized in that, this heart yearn bundle outside is coated with coating layer.

16. lamp tube drive circuit as claimed in claim 15 is characterized in that, this coating layer is polyester or polyester complexes.

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