CN220553349U - Transformer - Google Patents

Abstract

The application relates to a transformer, which comprises an iron core, a first metal sheet and a second metal sheet, wherein the first metal sheet is wound on the iron core; the second metal sheet is wound on the first metal sheet, and the first metal sheet and the second metal sheet are connected in a parallel winding mode. The transformer leakage inductance reducing device has the effects of reducing leakage inductance of the transformer and improving heat dissipation capacity of the transformer.

Description

Transformer

Technical Field

The application relates to the technical field of transformers, in particular to a transformer.

Background

The transformer is a device for changing alternating voltage by utilizing the principle of electromagnetic induction, can be used for terminal power supply and ring network power supply, and is quite convenient in a voltage conversion scene, thereby ensuring the reliability and flexibility of power supply.

In the prior art, the winding of the transformer is often wound by multiple strands, however, gaps among the wound multiple strands are larger, so that leakage inductance of the transformer is serious, and the internal resistance of the transformer is increased, thereby affecting the performance of the transformer.

Disclosure of Invention

In order to reduce leakage inductance and internal resistance of a transformer, the application provides a transformer.

The transformer adopts the following technical scheme:

a transformer, comprising an iron core, further comprising:

the first metal sheet is wound on the iron core;

the second metal sheet is wound on the first metal sheet, and the first metal sheet and the second metal sheet are connected in a parallel winding mode.

Through adopting above-mentioned technical scheme, adopt the sheetmetal to replace the wire rod such as stranded wire, and adopt the mode of doubling around between first sheetmetal and the second sheetmetal, the sheetmetal has wider width for the wire rod, can effectively reduce the clearance between first sheetmetal and the second sheetmetal when the sheetmetal twines to reduce the condition of leakage inductance, can also effectively reduce the internal resistance of winding simultaneously.

Optionally, the iron core includes first inducting piece and second inducting piece, first inducting piece with fixed connection between the second inducting piece.

Through adopting above-mentioned technical scheme, fixed connection between first inducting block and the second inducting block to form the magnetic flux return circuit on the iron core.

Optionally, there are at least two air gaps between the first sensing block and the second sensing block, the first sensing block is provided with two sensing parts, the sensing parts are arranged at two opposite ends of the sensing block, and the air gaps are arranged between the sensing parts and the second sensing block.

Through adopting above-mentioned technical scheme, first response piece and second response piece mutually support, cause to form the magnetic flux return circuit on the iron core, and the air gap sets up in the both ends of transformer core and not in the middle, and the heat that the transformer produced can directly produce at the both ends of transformer, helps the radiator heat dissipation.

Optionally, the first metal sheet and the second metal sheet are copper foils, and an insulating layer is wrapped outside the copper foils.

Through adopting above-mentioned technical scheme, first sheetmetal and second sheetmetal adopt the copper foil material, and the outside parcel of copper foil has the insulating layer, because the transformer during operation, power is great, leads to the copper foil to be broken down easily, and the insulating layer can play the guard action to the copper foil, in order to make insulating layer protection copper foil effect showing, can increase the thickness of insulating layer.

Optionally, the number of the sensing parts is two, two opposite ends of a sensing block, and the first sensing block and the sensing part are matched to form an E shape.

Through adopting above-mentioned technical scheme, two induction parts are located the relative both ends of first induction piece to make the shape of complex between first induction piece and the induction part appear "E" shape, cooperate with the second induction piece, thereby form two magnetic flux loops in the induction part respectively.

Optionally, a skeleton is disposed between the iron core and the first metal sheet, and the first metal sheet is wound on the skeleton.

Through adopting above-mentioned technical scheme, first sheetmetal winds to locate on the skeleton, and the both sides border of first sheetmetal and second sheetmetal butt each other, and the skeleton can play support and spacing first sheetmetal and second sheetmetal.

Optionally, pins are disposed on one sides of the first metal sheet and the second metal sheet.

By adopting the technical scheme, when the transformer is connected with an external electronic device for use, the transformer can be connected with the external electronic device through the pin, so that the transformer is connected to a circuit.

Optionally, the initial end of the first metal sheet along the length direction and the initial end of the second metal sheet along the length direction are mutually overlapped, and the tail end of the first metal sheet along the length direction and the tail end of the second metal sheet along the length direction are mutually overlapped.

Through adopting above-mentioned technical scheme, first sheetmetal and second sheetmetal coincide each other, effectively reduce the clearance between first sheetmetal and the second sheetmetal, effectively reduce the leakage inductance condition of transformer to and reduce the internal resistance of transformer.

In summary, the present application includes at least one of the following beneficial technical effects:

1. because the transformer works with higher power, the wire winding mode can generate leakage inductance phenomenon due to larger gaps between wires, and the first metal sheet and the second metal sheet can be tightly attached when in winding due to larger widths, so that the gaps between the first metal sheet and the second metal sheet are effectively reduced, the leakage inductance is reduced, and meanwhile, the internal resistance of the winding can be effectively reduced;

2. the arrangement of the air gaps and the arrangement of the air gaps at the two ends of the transformer are beneficial to guiding the heat generated by the transformer during operation outwards and facilitating the heat dissipation of the transformer;

3. because the transformer works with larger power, the copper foil is easy to break down, and the insulating layer can protect the copper foil.

Drawings

Fig. 1 is a schematic diagram of a transformer.

Fig. 2 is an exploded schematic view of a transformer.

Fig. 3 is a schematic diagram of a magnetic flux circuit of a transformer.

Fig. 4 is a schematic structural diagram of a first sensing block and a second sensing block in the second embodiment.

Fig. 5 is a schematic structural diagram of a first sensing block and a second sensing block in a third embodiment.

Reference numerals illustrate: 1. an iron core; 11. a first sensing block; 111. an induction unit; 12. a second sensing block; 13. an air gap; 2. a second metal sheet; 3. a skeleton; 4. pins.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses a transformer. Referring to fig. 1 and 2, the transformer includes an iron core 1, a first metal sheet and a second metal sheet 2, the first metal sheet is sleeved on the iron core 1, the second metal sheet 2 is sleeved outside the first metal sheet, the first metal sheet and the second metal sheet 2 are connected in a parallel winding manner, the parallel winding of the metal sheets is consistent with the parallel winding of the wire, namely, the metal sheets are parallel-wound, the first metal sheet and the second metal sheet 2 are tightly attached, and the first metal sheet and the second metal sheet 2 respectively form a primary side and a secondary side of the transformer.

Further, the initial end of the first metal sheet along the length direction coincides with the initial end of the second metal sheet 2 along the length direction, and the end of the first metal sheet along the length direction coincides with the end of the second metal sheet 2, that is, when the transformer is assembled, the side surfaces of the first metal sheet and the second metal sheet 2 are abutted against each other and coincide with each other, and then the first metal sheet and the second metal sheet 2 are wound on the iron core.

The first metal sheet and the second metal sheet 2 are tightly combined, so that leakage inductance of the transformer can be effectively reduced, internal resistance of the transformer can be reduced, and coupling is improved.

In this embodiment, the first metal sheet and the second metal sheet 2 are copper foils, and the insulating layers are respectively sleeved outside the copper foils, so that the thickness of the insulating layers can be relatively increased in order to reduce the breakdown of the copper foils.

The leakage inductance and the internal resistance of the transformer are reduced due to the fact that the first metal sheet is tightly attached to the second metal sheet 2, however, due to the fact that heat dissipation of the transformer is inconvenient, the transformer is easy to have a higher temperature after a period of working, further, referring to fig. 2 and 3, the iron core 1 comprises a first induction block 11 and a second induction block 12, the first induction block 11 and the second induction block 12 are fixedly connected, the connection mode can be directly wound by adhesive tapes, due to the fact that the framework 3 exists, the existence of an air gap 13 between the two induction blocks can be guaranteed when the two induction blocks are wound by the adhesive tapes, or the two induction blocks are directly connected by the adhesive, the air gap 13 is located at two ends of the induction blocks, and therefore after the middle portion of the wire column is abutted, the first induction block 11 and the second induction block 12 can be adhered by the adhesive, and the first induction block 11 and the second induction block 12 are tightly connected, and a magnetic flux loop is formed.

When the transformer works, a magnetic flux loop is formed on the first induction block 11 and the second induction block 12, the air gap 13 generates eddy current at the air gap 13 due to the action of magnetic radiation so as to generate a large amount of heat, the ordinary transformer air gap is arranged at the winding position of the iron core 1, the heat cannot be emitted to cause overheat phenomenon due to the fact that a large amount of wires are wound, the air gap is arranged at the two ends of the iron core 1 instead of the winding position of the iron core, and the iron core 1 is not wound with wires, so that a stronger radiating effect is achieved, namely, an air gap is formed between the induction parts 111 at the two ends on the first induction block 11 and the second induction block 12, and the heat can be directly emitted from the induction parts 111 at the two ends of the first induction block 11, so that the integral radiating performance of the transformer is effectively improved.

Optionally, a plurality of sensing portions 111 on the first sensing block 11 may be provided, a plurality of air gaps 13 are generated between the plurality of sensing portions 111 and the second sensing block 12, the more the air gaps 13 are, the better the heat dissipation performance is, but the more the air gaps 13 are, the volume of the transformer will be correspondingly increased, and since the resistance value of air is greater than that of the sensing blocks, the more the air gaps 13 are, the greater the internal resistance of the transformer will be, so the air gaps are preferably two.

In a preferred embodiment, a low permeability core, such as a nickel zinc ferrite core, is placed in the middle of the air gap 13, and is placed between the air gaps 13 of the first and second induction blocks 11 and 12, the permeability of the core 1 is much higher than that of the low permeability core, and compared with air, the resistance of the low permeability core is smaller, and the low permeability core is used because it is not integrally formed with the core 1 and no wire is wound around the low permeability core, thereby not only achieving the heat dissipation effect, but also ensuring that the internal resistance of the varistor is not too large.

The air gap 13 is configured to facilitate the dissipation of heat from the transformer, and it is noted that, referring to fig. 2 and 3, the sensing portion 111 and the first sensing block 11 are matched to form an "E", and in this application, the second sensing block 12 is also formed as an "E".

Similarly, referring to fig. 4, in another embodiment, the second sensing block 12 may also have an "I" shape, so long as the first sensing block 11 and the second sensing block 12 cooperate with each other to form a magnetic flux loop, and an air gap 13 is disposed between the first sensing block 11 and the second sensing block 12, which is within the protection scope of the present application.

Similarly, referring to fig. 5, in another embodiment, the first sensing block 11 and the second sensing block 12 may not be "E" shaped, but may also take on "M" shape. The specific structures of the first sensing block 11 and the second sensing block 12 are not limited in this application.

Preferably, when the EE-shaped iron core is adopted in the iron core 1, when the first metal sheet and the second metal sheet 2 are wound on the wire column in the middle of the EE-shaped iron core, a certain metal sheet winding sparse part exists at the contact part of the wire column in the middle of the two E-shaped induction blocks, and because the metal sheet winding of the part is sparse, the generating position of vortex is positioned at the contact position of the wire column in the middle when the transformer works, the main position of heat generation is also positioned at the contact part of the wire column, and the metal sheet is sparse in winding at the contact position of the wire column in the middle when the metal sheet is wound in parallel, so that the integral heat dissipation effect of the transformer can be further enhanced.

In addition, referring to fig. 1 and 2, a frame 3 is disposed between the iron core 1 and the first metal sheet, the first metal sheet is sleeved on the frame 3, the frame 3 supports and limits the first metal sheet and the second metal sheet 2, and when the transformer is assembled, the first metal sheet and the second metal sheet 2 are fixed on the frame 3, and then the frame 3 is matched with the first sensing block 11 and the second sensing block 12. The first metal sheet and the second metal sheet 2 are respectively provided with a pin 4, and are connected with an external device through the pins 4, so that the transformer can play a role. The implementation principle of the transformer in the embodiment of the application is as follows: the transformer includes iron core 1, first sheetmetal and second sheetmetal 2, and first sheetmetal cover is located on the iron core 1, and second sheetmetal 2 then overlaps and locates on the first sheetmetal, and first sheetmetal adopts the mode of being around with second sheetmetal 2, and closely laminates between first sheetmetal and the second sheetmetal 2, when the transformer during operation, can form the magnetic flux return circuit on the iron core 1, and because the clearance between first sheetmetal and the second sheetmetal 2 is very little, can effectively reduce the leakage inductance condition of transformer and reduce the internal resistance of winding.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. A transformer, characterized in that it comprises an iron core (1), and further comprises:

the first metal sheet is wound on the iron core (1);

the second metal sheet (2) is wound on the first metal sheet, and the first metal sheet and the second metal sheet (2) are connected in a parallel winding mode.

2. A transformer according to claim 1, characterized in that: the iron core (1) comprises a first induction block (11) and a second induction block (12), and the first induction block (11) is fixedly connected with the second induction block (12).

3. A transformer according to claim 2, characterized in that a plurality of air gaps (13) are present between the first inductor block (11) and the second inductor block (12), the first inductor block (11) being provided with two inductor parts (111), the inductor parts (111) being provided at opposite ends of the inductor block, the air gaps (13) being provided between the inductor parts (111) and the second inductor block (12).

4. A transformer according to claim 1, characterized in that: the first metal sheet and the second metal sheet (2) are copper foils, and insulating layers are wrapped outside the copper foils.

5. A transformer according to claim 3, wherein the number of sensing parts (111) is two, the two sensing parts (111) being located at opposite ends of the first sensing block (11), respectively.

6. A transformer according to claim 1, characterized in that: a framework (3) is arranged between the iron core (1) and the first metal sheet, and the first metal sheet is wound on the framework (3).

7. A transformer according to claim 1, characterized in that: and pins (4) are arranged on one sides of the first metal sheet and the second metal sheet (2).

8. A transformer according to claim 1, characterized in that: the initial end of the first metal sheet along the length direction is mutually overlapped with the initial end of the second metal sheet (2) along the length direction, and the tail end of the first metal sheet along the length direction is mutually overlapped with the tail end of the second metal sheet (2) along the length direction.