CN218730355U - Anti-interference transformer - Google Patents

Abstract

The utility model discloses an anti-interference transformer, including shielding case and transformer body, transformer body sets up in the shielding case, the shielding case includes the box, the inner wall of box plates and is equipped with first shielding layer, a plurality of louvres have been seted up on the box, transformer body includes magnetic core, primary and secondary, the skin of magnetic core plates and is equipped with the second shielding layer, the primary is around establishing on the second shielding layer, the skin of primary is equipped with the third shielding layer, the secondary is around establishing on the third shielding layer, the number of turns of primary is the same with the number of turns of secondary. The first shielding layer is plated on the shielding box, so that the electromagnetic interference of the outside to the transformer body can be effectively prevented; and the magnetic core, the primary coil and the secondary coil are respectively provided with corresponding shielding layers between two pairs, so that mutual interference can be effectively shielded, and the whole transformer can effectively reduce electromagnetic interference.

Description

Anti-interference transformer

Technical Field

The utility model relates to a transformer technical field, concretely relates to anti-interference transformer.

Background

The transformer is a device for changing alternating voltage by using the principle of electromagnetic induction, and main components are a primary coil, a secondary coil and a magnetic core. The main functions relate to voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization, etc. The transformer can be divided into a power transformer and a special transformer according to application, and the special transformer is also an electric furnace transformer, a rectification transformer, a power frequency test transformer, a voltage regulator, a mining transformer, an audio transformer, a medium frequency transformer, a high frequency transformer, an impact transformer, an instrument transformer, an electronic transformer, a reactor, a mutual inductor and the like.

Transformers are important components that make up the power grid, and in switching power transformers, electromagnetic interference is essential. The existing switching power supply generally adopts a Y capacitor, the Y capacitor can effectively reduce electromagnetic interference, but leakage current is generated between an input line and an output line due to the existence of the Y capacitor, a metal shell charger with the Y capacitor can cause the danger of electric shock of a user, and the electromagnetic interference is difficult to avoid by removing the Y capacitor.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide an anti-interference transformer, which can effectively reduce electromagnetic interference.

The purpose of the utility model is realized by adopting the following technical scheme:

the utility model provides an anti-interference transformer, including shielding case and transformer body, transformer body sets up in the shielding case, the shielding case includes the box, the inner wall of box plates and is equipped with first shielding layer, a plurality of louvres have been seted up on the box, transformer body includes magnetic core, primary and secondary, the skin of magnetic core plates and is equipped with the second shielding layer, the primary is around establishing on the second shielding layer, the skin of primary is equipped with the third shielding layer, the secondary is around establishing on the third shielding layer, the number of turns of primary is the same with the number of turns of secondary.

The present invention provides an alternative embodiment, wherein the primary coil comprises a first layer primary coil, a second layer primary coil and a third layer primary coil, and the first layer primary coil, the second layer primary coil and the third layer primary coil are all provided with a coil shielding layer therebetween.

In the present invention, as an optional embodiment, the first layer primary coil, the second layer primary coil and the third layer primary coil are all wound in the same direction.

The present invention provides an alternative embodiment, wherein the secondary coil comprises a first layer secondary coil, a second layer secondary coil and a third layer secondary coil, and the first layer secondary coil, the second layer secondary coil and the third layer secondary coil are sequentially wound on the primary coil.

The utility model discloses in, as an optional embodiment, the box includes casing and lid, the lid is connected with the casing buckle, all be equipped with first shielding layer on the lateral wall of casing and the bottom plate, be equipped with first shielding layer on the lid, the louvre sets up on the casing.

In the present invention, as an optional embodiment, the periphery of the cover body near one side of the housing is provided with a waterproof sealing ring.

The utility model discloses in, as an optional embodiment, the louvre is a plurality of rectangular shape hole, and a plurality of louvre is arranged from last to arranging in proper order down, and the top edge of each louvre outwards extends the breakwater.

In the present invention, as an optional embodiment, the water baffle is inclined from top to bottom.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the anti-interference transformer of the utility model is provided with the shielding wire outside the transformer body, and the shielding box is plated with the first shielding layer, thereby effectively preventing the electromagnetic interference of the outside to the transformer body; and the transformer body sets up magnetic core, primary coil and secondary to magnetic core, primary and secondary are equipped with corresponding shielding layer respectively between two liang, can effectively shield mutual interference, make whole transformer can effectively reduce electromagnetic interference.

Drawings

Fig. 1 is a schematic structural diagram of an anti-interference transformer according to an embodiment of the present invention;

fig. 2 is another schematic structural diagram of an anti-interference transformer according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a shielding box according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a cover body according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a hierarchical structure of a transformer body according to an embodiment of the present invention.

In the figure: 1. a shielding box; 11. a box body; 111. heat dissipation holes; 112. a housing; 113. a cover body; 12. a first shielding layer; 13. a waterproof sealing ring; 2. a transformer body; 21. a magnetic core; 22. a primary coil; 221. a first layer of primary coils; 222. a second layer primary coil; 223. a third secondary primary coil; 23. a secondary coil; 231. a first layer of secondary coils; 232. a second layer of secondary coils; 233. a third layer of secondary coils; 24. a second shielding layer; 25. a third shielding layer; 26. and a coil shielding layer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict. Except as specifically noted, the materials and equipment used in this example are commercially available. Examples of embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. In the description of the present application, "a plurality" means two or more unless specifically stated otherwise.

In the description of the present application, it should be noted that unless otherwise specifically stated or limited, the terms "connected," "communicating," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a connection through an intervening medium, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The embodiment of the application provides an anti-interference transformer, wherein a shielding wire is arranged outside a transformer body, and a first shielding layer is plated on a shielding box, so that electromagnetic interference of the outside to the transformer body can be effectively prevented; and the transformer body sets up magnetic core, primary coil and secondary to magnetic core, primary and secondary are equipped with corresponding shielding layer respectively between two liang, can effectively shield mutual interference, make whole transformer can effectively reduce electromagnetic interference.

Referring to fig. 1-5, the anti-interference transformer provided in this embodiment includes a shielding box 1 and a transformer body 2, the transformer body 2 is disposed in the shielding box 1, the shielding box 1 includes a box body 11, a first shielding layer 12 is plated on an inner wall of the box body 11, a plurality of heat dissipation holes 111 are disposed on the box body 11, the transformer body 2 includes a magnetic core 21, a primary coil 22 and a secondary coil 23, a second shielding layer 24 is plated on an outer layer of the magnetic core 21, the primary coil 22 is wound on the second shielding layer 24, a third shielding layer 25 is disposed on an outer layer of the primary coil 22, the secondary coil 23 is wound on the third shielding layer 25, and the number of turns of the primary coil 22 is the same as the number of turns of the secondary coil 23.

In the embodiment, the shielding box 1 can protect the transformer body 2 and isolate external electromagnetic interference. Wherein, set up louvre 111 on box 11, can be so that the heat that transformer body 2 produced obtains timely giving off, have good radiating effect, and then can avoid the problem of 2 internal circuit short circuits of transformer body, and then also improved the interference killing feature, improved the stability of transformer. In addition, the second shielding layer 24 and the third shielding layer 25 may be made of the same shielding material or different shielding materials, for example, a metal shielding layer is plated on the outer side of the magnetic core, the metal layer may be, for example, aluminum, nickel, or copper, and the third shielding layer 25 may also be made of a metal shielding layer. In order to achieve the insulating effect, the main body of the shielding box 1 is made of an insulating material, but the insulating material does not have the electromagnetic shielding function, so in the embodiment, in order to achieve the effect of shielding electromagnetic interference, the inner wall of the box body 11 is plated with the first shielding layer 12, and the first shielding layer 12 is any metal coating with good electrical conductivity.

The primary coil 22 of the embodiment includes a first layer of primary coils 221, a second layer of primary coils 222, and a third layer of primary coils 223, and the coil shielding layers 26 are provided between each of the first layer of primary coils 221, the second layer of primary coils 222, and the third layer of primary coils 223. The primary coil 22 is wound by multiple layers, for example, the primary coil 22 may be wound by 120 turns, and the 120 turns are wound by three layers.

Further, the first layer primary winding 221, the second layer primary winding 222, and the third layer primary winding 223 are wound in the same direction. That is, the primary coils of each layer are wound in a zigzag manner, for example, the primary coil 221 of the first layer is wound from left to right around the magnetic core 21 to the right of the magnetic core 21, and then the primary coil is folded back to the left of the magnetic core 21 to continue the winding of the primary coil 222 of the second layer, that is, the primary coil 222 of the second layer and the primary coil 223 of the third layer are wound from the left to the right, and the winding direction is the same as that of the primary coil 221 of the first layer. The winding method can keep the voltage difference of each layer of primary coil 221 at a certain end basically consistent, namely, the voltage difference is reduced, the current change rate is reduced, and further the electromagnetic interference is reduced.

On the other hand, the secondary coil 23 includes a first-level secondary coil 231, a second-level secondary coil 232, and a third-level coil 233, and the first-level secondary coil 231, the second-level secondary coil 232, and the third-level coil 233 are wound around the primary coil 22 in this order. In an embodiment, the number of turns of the secondary coil 2323 may be the same as that of the primary coil 22, and the secondary coil may be wound in the same manner as that of the primary coil 22.

The box 11 of the embodiment includes a housing 112 and a cover 113, the cover 113 is connected to the housing 112 by a snap fit, the side wall and the bottom plate of the housing 112 are both provided with a first shielding layer 12, the cover 113 is provided with the first shielding layer 12, and the heat dissipation hole 111 is provided on the housing 112. The casing 112 and the cover 13 are connected by a snap fit, so that the assembly, disassembly and inspection and maintenance of the transformer body 2 are facilitated. And a first shielding layer 12 is arranged on the inner wall of each surface of the box body 11 to enhance the shielding effect.

In order to increase the waterproof performance of the box 11, a waterproof sealing ring 13 is provided on the periphery of one surface of the cover 113 close to the housing 112. The cover 113 may have a groove formed on a peripheral edge thereof adjacent to one surface of the housing 112, and the waterproof gasket 13 is mounted in the groove.

The heat dissipation holes 111 in the embodiment are a plurality of strip-shaped holes, the heat dissipation holes 111 are sequentially arranged from top to bottom, and a water baffle extends outwards from the top edge of each heat dissipation hole 111. The water baffle is obliquely arranged from top to bottom. The louvre 111 of embodiment sets up the breakwater, can prevent that steam from getting into in the box 11 through louvre 111 to this breakwater from top to bottom leans out, makes louvre 111's vent turn to for downwards, both can dispel the heat and can be more effective waterproof again. In addition, the first shielding layer 12 can be enhanced around the heat dissipation holes 111, and the influence of the heat dissipation holes 111 on the shielding effect is avoided.

While only certain features and embodiments of the present application have been illustrated and described, many modifications and changes may occur to those skilled in the art without departing substantially from the scope and spirit of the appended claims, for example: variations in the size, dimensions, structure, shape and proportions of the various elements, mounting arrangements, use of materials, colours, orientations and the like.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the embodiments of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the embodiments of the present invention are all within the protection scope of the embodiments of the present invention.

Claims (8)

1. The utility model provides an anti-interference transformer, its characterized in that, includes shielding case and transformer body, transformer body sets up in the shielding case, the shielding case includes the box, the inner wall of box plates and is equipped with first shielding layer, a plurality of louvres have been seted up on the box, transformer body includes magnetic core, primary and secondary, the skin of magnetic core plates and is equipped with the second shielding layer, the primary is around establishing on the second shielding layer, the skin of primary is equipped with the third shielding layer, the secondary is around establishing on the third shielding layer, the number of turns of primary is the same with the number of turns of secondary.

2. The antijam transformer of claim 1, wherein the primary coils include a first layer of primary coils, a second layer of primary coils and a third layer of primary coils, and a coil shielding layer is arranged between every two of the first layer of primary coils, the second layer of primary coils and the third layer of primary coils.

3. The antijam transformer of claim 2, wherein the first layer primary winding, the second secondary primary winding and the third layer primary winding are wound in the same direction.

4. The antijam transformer of claim 3, wherein the secondary windings include a first secondary winding, a second secondary winding and a third secondary winding, the first secondary winding, the second secondary winding and the third secondary winding being sequentially wound around the primary winding.

5. The antijamming transformer of claim 1, wherein the box includes a housing and a cover, the cover is connected to the housing by a snap fit, the side wall and the bottom plate of the housing are both provided with a first shielding layer, the cover is provided with a first shielding layer, and the heat dissipation holes are formed in the housing.

6. The antijam transformer of claim 5 wherein the cover has a waterproof seal around the perimeter of the face adjacent the housing.

7. The antijam transformer of claim 5, wherein the heat dissipation holes are a plurality of elongated holes, the plurality of heat dissipation holes are arranged in sequence from top to bottom, and a water baffle extends outwardly from a top edge of each heat dissipation hole.

8. The antijam transformer of claim 7 wherein said dam is angled from top to bottom.

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