A transformer

Abstract

The utility model discloses a mutual inductor, include: shell, coil is located in the shell, and has the hole of wearing along the axial direction, framework is including integrative first insulation part and second insulation part, and first insulation part is used for supporting the coil, and second insulation part is worn in the hole of wearing, conductor, wear in second insulation part, and be located between first insulation part and the bottom wall of shell. The utility model discloses mutual inductor, through setting integrative first insulation part and second insulation part, thereby when assembling into mutual inductor, after installing conductor on the framework, again, the coil is on the second insulation part cover, finally, the whole initial whole body can be installed to the shell, like this, the spare part of whole mutual inductor is few, and the installation step is simple, and the installation of mutual inductor is convenient, and the installation efficiency is promoted.

Description

Technical Field

[0001] This utility model belongs to the field of mutual inductor technology, and specifically relates to a mutual inductor. Background Technology

[0002] A current transformer is an instrument that measures current by converting a large primary current into a small secondary current using the principle of electromagnetic induction. It typically consists of a housing, a primary conductor, and a secondary coil. The primary conductor passes through a through-hole in the center of the coil and is used to connect to an external circuit. To ensure the current transformer's withstand voltage breakdown and short-circuit performance, separate insulating components are usually provided between the primary conductor and the coil, as well as between the housing and the coil. This makes the installation of current transformers complex. Utility Model Content

[0003] The purpose of this utility model is to disclose a current transformer to solve the technical problem of complex installation of current transformers in the prior art.

[0004] To achieve the above objectives, this utility model discloses a current transformer, comprising: shell; A coil is disposed within the housing and has a through hole along the axial direction; The frame includes an integrally formed first insulating part and a second insulating part, the first insulating part being used to support the coil, and the second insulating part passing through the through hole; A conductor is inserted through the second insulating portion and located between the first insulating portion and the bottom wall of the housing.

[0005] As an optional implementation, the second insulating portion includes at least a first sidewall and a second sidewall disposed opposite to each other along the thickness direction of the conductor.

[0006] As an optional implementation, the second insulating portion further includes a third sidewall and a fourth sidewall disposed opposite to each other, wherein the first sidewall, the third sidewall, the second sidewall and the fourth sidewall are connected in sequence.

[0007] As an optional implementation, the conductor can be installed on the first insulating portion and the second insulating portion after bending is completed; The first insulating portion has a first notch in the radial direction, and the second insulating portion has a second notch. The second notch extends along the axial direction of the coil and is connected to the first notch. The first notch and the second notch are used for the conductor to pass through.

[0008] As an optional implementation, the sidewall at one end of the first notch that connects to the second notch is an arc-shaped sidewall.

[0009] As an optional implementation, the conductor and the sidewall of the second insulating portion having the second notch have a gap.

[0010] As an optional implementation, the conductor includes a first lead-out portion, a through portion, a connecting portion, an extension portion, and a second lead-out portion connected in sequence. The through portion passes through the first insulating portion, the connecting portion is located between the bottom wall of the outer shell and the first insulating portion, the connecting portion and the first notch are arranged at an angle, and the extension portion extends axially toward the coil.

[0011] As an optional implementation, the housing includes a first mounting portion and a second mounting portion, wherein the first mounting portion mounts the coil and the frame, and the connecting portion extends from the first mounting portion to the second mounting portion.

[0012] As an alternative implementation, the height of the second insulating portion is greater than or equal to the height of the coil along the axial direction of the coil.

[0013] As an alternative implementation, the height of the conductor is higher than the height of the second insulating portion along the axial direction of the coil.

[0014] Compared with the prior art, the beneficial effects of the current transformer of this utility model are as follows: The current transformer of this utility model has an integrally formed first and second insulating part. When assembling the current transformer, after the conductor is installed on the frame, the coil is wrapped on the second insulating part, and finally the entire assembly is installed into the housing. In this way, the current transformer has fewer parts, the installation steps are simple, the installation of the current transformer is convenient, the installation efficiency is improved, and thus the effects of increasing production capacity and improving enterprise benefits are achieved. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the mutual inductor from one perspective of an embodiment of the present invention; Figure 2 yes Figure 1 Another structural diagram of the mutual inductor in the diagram; Figure 3 yes Figure 2 Enlarged view of point I in the middle; Figure 4 yes Figure 1 A schematic diagram of the explosion of the current transformer in the middle; Figure 5 yes Figure 1 Top view of the mutual inductor in the middle; Figure 6 yes Figure 5 A cross-sectional view along the AA direction; Figure 7 yes Figure 6 A schematic diagram of the skeleton and conductor in the diagram.

[0017] Explanation of key figure labels: 100-Inductor, 10-Housing, 11-First mounting part, 12-Second mounting part, 121-Straight segment, 122-Arc segment, 13-Receiving cavity, 20-Coil, 21-Through hole, 20-Frame, 21-First insulation part, 211-First notch, 212-Arc sidewall, 22-Second insulation part, 221-First sidewall, 222-Second sidewall, 223-Third sidewall, 224-Fourth sidewall, 225-Second notch, 30-Conductor, 31-First lead-out part, 32-Through part, 33-Connecting part, 34-Extension part, 35-Second lead-out part. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0020] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0021] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0022] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0023] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0024] Please see Figures 1 to 7 This application provides a current transformer 100, which includes a housing 10, a coil 20, a frame 20, and a conductor 30.

[0025] The outer shell 10 is provided with a receiving cavity 13; the coil 20 is disposed in the receiving cavity 13 of the outer shell 10 and has a through hole 21 located in the axial direction; the frame 20 includes an integrally formed first insulating part 21 and a second insulating part 22, the first insulating part 21 is used to support the coil 20, and the second insulating part 22 passes through the through hole 21; the conductor 30 passes through the second insulating part 22 and is located between the first insulating part 21 and the bottom wall of the outer shell 10.

[0026] The aforementioned current transformer 100, by providing an integrally formed first insulating part 21 and a second insulating part 22, allows for easy assembly of the current transformer 100. After the conductor 30 is installed on the frame 20, the coil 20 is then wrapped around the second insulating part 22, and finally the entire assembly is installed into the housing 10. In this way, the current transformer 100 has fewer parts, the installation steps are simple, and the installation of the current transformer 100 is convenient, improving installation efficiency and thus achieving the effect of increasing production capacity and improving enterprise benefits.

[0027] The outer casing 10 has an opening that is connected to the receiving cavity 13 to place the coil 20, the frame 20 and the conductor 30 inside the outer casing 10.

[0028] Furthermore, when setting the second insulating part 22, the height of the second insulating part 22 is greater than or equal to the height of the coil 20 along the central axis of the coil 20, so as to achieve insulation between the coil 20 and the conductor 30 along the axial direction.

[0029] In achieving insulation between coil 20 and conductor 30, the second insulating portion 22 includes at least a first sidewall 221 and a second sidewall 222 disposed opposite to each other along the thickness direction of conductor 30. Thus, since the thickness direction of conductor 30 consists of two surfaces with larger areas, the first sidewall 221 and the second sidewall 222 are respectively provided to block the coil 20 and conductor 30, thereby achieving electrical insulation between them and increasing the creepage distance.

[0030] Please see Figure 3 and Figure 4 To further improve the insulation effect, the second insulation part 22 also includes a third sidewall 223 and a fourth sidewall 224 arranged opposite to each other. The first sidewall 221, the third sidewall 223, the second sidewall 222 and the fourth sidewall 224 are connected in sequence. In this way, the four sidewalls are arranged around the conductor 30, blocking the conductor 30 from all directions and the coil 20, so as to achieve a better insulation effect.

[0031] In this embodiment, the conductor 30 is bent before being installed onto the first insulating portion 21 and the second insulating portion 22. To achieve this installation effect, the first insulating portion 21 has a first notch 211 radially, and the second insulating portion 22 has a second notch 225 extending axially along the coil 20. The second notch 225 is connected to the first notch 211. Thus, by providing the first notch 211 and the second notch 225, the conductor 30 can be threaded through, thereby enabling the bent conductor 30 with an irregular structure to be installed onto the frame 20. It can be understood that compared to inserting the straight conductor 30 into the first insulating portion 21 and the second insulating portion 22 before bending it, installing the bent conductor 30 onto the entire frame 20 not only reduces the bending difficulty of the conductor 30 but also improves the forming accuracy of the conductor 30.

[0032] Specifically, when the second notch 225 is provided, and when the second insulating portion 22 is configured to include four sidewalls, the first sidewall 221 is provided with the second notch 225 on the side facing the fourth sidewall 224, so that it is not necessary to make notches on other sidewalls, thus ensuring the blocking area of ​​other sidewalls; in other embodiments, the first sidewall 221 and the fourth sidewall 224 may both be provided with sub-notches on the opposite sides, and the two sub-notches together form the second notch 225, thereby increasing the opening area of ​​the entire second notch 225. Please see Figure 7In order to facilitate the installation of the bent conductor 30 on the entire frame 20, the side wall of the first notch 211 connecting to the second notch 225 is an arc-shaped side wall 212. In this way, the arc-shaped side wall 212 can avoid the installation of the conductor 30 when it is inserted, and also avoids the risk of sharp parts scratching the conductor 30.

[0033] Understandably, since the conductor 30 needs to be installed within the second insulation portion 22 along the second notch 225, to facilitate the installation of the conductor 30, a gap is formed between the conductor 30 and the sidewall of the second insulation portion 22 where the second notch 225 is located. Specifically, a gap is formed between the conductor 30 and the first sidewall 221, such as... Figure 2 and Figure 3 As shown, this means that there is sufficient space within the second insulating part 22 for the conductor 30 to be installed, thereby enabling the conductor 30 to be smoothly installed into the second insulating part 22.

[0034] Please see Figures 4 to 7 This is a schematic diagram of the conductor 30 according to an embodiment of the present invention. The conductor 30 includes a first lead-out portion 31, a through portion 32, a connecting portion 33, an extension portion 34, and a second lead-out portion 35 connected in sequence. The through portion 32 passes through the first insulating portion 21. The connecting portion 33 is located between the bottom wall of the outer shell 10 and the first insulating portion 21. The connecting portion 33 and the first notch 211 are arranged at an angle. The extension portion 34 extends axially towards the coil 20. Thus, the first lead-out portion 31 and the second lead-out portion 35 are used to achieve electrical connection with the external structure. The through portion 32 enables the conductor 30 to be mounted on the frame 20. The connecting portion 33 enables the conductor 30 to be mounted on the frame 20. Because the connecting part 33 has a certain extension length, the first lead-out part 31 and the second lead-out part 35 can not overlap along the axial direction of the coil 20. Through the setting of the extension part 34, the first lead-out part 31 and the second lead-out part 35 can have the same placement height. By setting the setting direction of the connecting part 33 and the first notch 211 at an angle, since the first notch 211 is not provided with insulating material, it is easy to be broken down by voltage. By setting the angle between the connecting part 33 and the first notch 211, the connecting part 33 avoids the first notch 211, so that there is insulating material between the connecting part 33 and the coil 20 to avoid the risk of being broken down by voltage.

[0035] Furthermore, the included angle between the two can be set according to the different distances or included angles between the first lead-out portion 31 and the second lead-out portion 35.

[0036] Please see Figure 1 , Figure 2 as well as Figure 4Corresponding to the structure of conductor 30, the outer casing 10 of this embodiment includes a first mounting part 11 and a second mounting part 12. The first mounting part 11 mounts the coil 20 and the frame 20, and the second mounting part 12 mounts the connecting part 33. By setting the outer casing 10 into two parts, the entire conductor 30 can be mounted. Meanwhile, the coil 20 is only mounted on the first mounting part 11. Therefore, the second mounting part 12 only needs to support the connecting part 33.

[0037] In this embodiment, the first lead-out portion 31 and the second lead-out portion 35 are arranged in parallel, so that the second mounting portion 12 includes a straight segment 121 and an arc segment 122 corresponding to the placement direction of the second lead-out portion 35. The straight segment 121 is connected to the first mounting portion 11, and the arc segment bends towards the first lead-out portion 31, so as to achieve the effect that the first lead-out portion 31 can be parallel to the second lead-out portion 35.

[0038] Specifically, when the conductor 30 is set, the height of the conductor 30 is higher than the second insulation portion 22 along the axial direction of the coil 20. In particular, the through portion 32 is set higher than the second insulation portion 22. This avoids contact between the first lead portion 31 and the coil 20. At the same time, there is a certain gap between the first lead portion 31 and the coil 20, which increases the creepage distance between the coil 20 and the first lead portion 31.

[0039] In this embodiment, the conductor 30 is made of copper. In other embodiments, it can also be made of silicon steel sheet.

[0040] The aforementioned current transformer 100, by setting the frame 20 for mounting the conductor 30 as an integrally formed first insulating part 21 and second insulating part 22, facilitates the installation of the entire current transformer 100, has higher installation efficiency, and can also achieve insulation effect between the coil 20 and the conductor 30. The setting of the second insulating part 22 improves the insulation level between the conductor 30 and the coil 20, reduces the capacitance value between the conductor 30 and the coil 20, and the entire current transformer 100 has higher withstand voltage breakdown performance and stronger short circuit resistance performance.

[0041] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A current transformer, characterized in that, include: shell; A coil is disposed within the housing and has a through hole along the axial direction; The frame includes an integrally formed first insulating part and a second insulating part, the first insulating part being used to support the coil, and the second insulating part passing through the through hole; A conductor is inserted through the second insulating portion and located between the first insulating portion and the bottom wall of the housing.

2. The current transformer according to claim 1, characterized in that, The second insulating portion includes at least a first sidewall and a second sidewall disposed opposite to each other along the thickness direction of the conductor.

3. The current transformer according to claim 2, characterized in that, The second insulating portion further includes a third sidewall and a fourth sidewall disposed opposite to each other, wherein the first sidewall, the third sidewall, the second sidewall and the fourth sidewall are connected in sequence.

4. The current transformer according to any one of claims 1-3, characterized in that, The conductor can be installed on the first insulating part and the second insulating part after being bent; The first insulating portion has a first notch in the radial direction, and the second insulating portion has a second notch. The second notch extends along the axial direction of the coil and is connected to the first notch. The first notch and the second notch are used for the conductor to pass through.

5. The current transformer according to claim 4, characterized in that, The sidewall at one end of the first notch that connects to the second notch is an arc-shaped sidewall.

6. The current transformer according to claim 4, characterized in that, The conductor and the sidewall of the second insulating portion having the second notch have a gap.

7. The current transformer according to claim 4, characterized in that, The conductor includes a first lead-out portion, a through portion, a connecting portion, an extension portion, and a second lead-out portion connected in sequence. The through portion passes through the first insulating portion. The connecting portion is located between the bottom wall of the outer shell and the first insulating portion. The connecting portion and the first notch are arranged at an angle. The extension portion extends axially toward the coil.

8. The current transformer according to claim 7, characterized in that, The housing includes a first mounting portion and a second mounting portion, wherein the first mounting portion mounts the coil and the frame, and the connecting portion extends from the first mounting portion to the second mounting portion.

9. The current transformer according to any one of claims 1-3, characterized in that, Along the axial direction of the coil, the height of the second insulating portion is greater than or equal to the height of the coil.

10. The current transformer according to any one of claims 1-3, characterized in that, Along the axial direction of the coil, the height of the conductor is higher than the height of the second insulating portion.

Images