A small patch transformer

Abstract

The utility model relates to the technical field of electrical equipment, and concretely relates to a small -size patch mutual inductor, and the mutual inductor includes support base, fixed ring, magnetic core block, movable copper bar and spin winding coil, and the operator first flows into fixed slot through movable slot with movable copper bar, continues to utilize spin winding coil to spin the through -going pipe in the middle part of support base, and utilizes the magnetic core column in the middle part of magnetic core block to pass through -going pipe and the middle part fixed support base of movable copper bar and spin winding coil, and then utilizes lead pin foot to connect spin winding coil end and can complete structure installation, and the equipment simple structure effectively utilizes through -going pipe to position installation to magnetic core column, and the structure cooperation of movable copper bar and movable slot can simplify installation process, has good practicality and economy, is beneficial to the popularization and use of equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of electrical equipment, specifically to a small patch current transformer. Background Technology

[0002] The existing surface mount current transformer mainly consists of a magnetic core and two sets of coils. The coils are connected by several pins, and the magnetic core runs through the middle of the winding coil to realize functions such as current detection.

[0003] Meanwhile, during the manufacturing process, when assembling the two coil windings with the magnetic core, the coil windings are difficult to position and flatten, and their close proximity to the magnetic core affects the reliability and service life. In addition, the two sets of coils are relatively thick, resulting in a large size of the surface mount current transformer. Due to its relatively simple function, it cannot be used in increasingly simplified electrical equipment environments. Utility Model Content

[0004] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a small patch current transformer with a simple structure, simplified and optimized assembly process, and small volume.

[0005] The technical solution adopted by this utility model is as follows: a small patch current transformer includes a support base, a connecting groove on one side of the support base, a movable copper busbar in the connecting groove, the movable copper busbar being bent in the middle and passing into the connecting groove, and a plurality of lead pins on the side of the support base away from the opening of the connecting groove; a through tube in the middle of the support base, the through tube passing through the connecting groove, a coil wound around the outer side of the through tube, and the plurality of lead pins sequentially connecting to one end of the winding wire of the coil; two sets of symmetrically arranged magnetic core blocks on both sides of the support base, the magnetic core blocks having a C-shaped structure, a magnetic core column in the middle of the concave side of the magnetic core block, one magnetic core column passing into the middle of the through tube, and the other magnetic core column passing into the middle of the connecting groove and abutting the inner bent side of the movable copper busbar, the two sets of magnetic core columns abutting each other.

[0006] In one embodiment, the outer side of the wound coil is wrapped with an insulating wrapping.

[0007] In one embodiment, the insulating wrapping material is one or more of PVC, PE, and PTFE.

[0008] In one embodiment, the connecting groove includes an inlet movable groove and a fixed groove located at the center of the support base. The movable groove has a rectangular groove structure, and the fixed groove has a disc-shaped groove structure. The movable groove and the fixed groove are interconnected to form a mushroom-shaped structure.

[0009] In one embodiment, the movable copper busbar is bent in planar shape, and the projected view of the bent movable copper busbar also presents a mushroom-shaped structure.

[0010] In one embodiment, a fixing ring is provided on the outer side of the two sets of magnetic core blocks, and the fixing ring wraps around and assists the two sets of magnetic core blocks to abut against each other.

[0011] In one embodiment, a constraint plate is provided between the end of the through tube and the adjacent magnetic core block to prevent the winding of the coil from scattering.

[0012] In one embodiment, the connecting groove is filled with a fixing adhesive.

[0013] The beneficial effects of this utility model are: simple structure, simplified and optimized assembly process, and a small patch current transformer with a small volume. Specifically, the beneficial effects are:

[0014] 1. Replacing one winding wire with a movable copper busbar simplifies the equipment size and makes it suitable for multiple scenarios;

[0015] 2. The installation structure of the movable copper busbar is used in conjunction with the connecting groove to fix the position of the movable copper busbar and prevent the structure from falling off;

[0016] 3. By setting a through tube, the core column in the middle of the core block can be accurately positioned, the gap between the core and the winding coil can be increased, the heat dissipation area can be increased and the life can be improved, while the installation process can be simplified and subsequent automated production can be facilitated. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is an exploded three-dimensional structural diagram of the present invention;

[0020] Figure 3 This is a partial cross-sectional three-dimensional structural schematic diagram of this utility model.

[0021] Figure descriptions: 1. Support base; 12. Lead pin; 13. Constraint plate; 14. Through tube; 15. Movable slot; 16. Fixed slot; 2. Fixed ring; 3. Magnetic core block; 31. Magnetic core column; 4. Movable copper busbar; 5. Winding coil; 51. Insulation wrapping. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] The following is combined with Figure 1-3 This invention describes a specific embodiment of a small patch current transformer, comprising a support base 1 made of insulating material. A connecting groove is provided on one side of the support base 1, and a movable copper busbar 4 is disposed within the connecting groove. The movable copper busbar 4 is bent in the middle and passes into the connecting groove. Several lead pins 12 are provided on the side of the support base 1 away from the opening of the connecting groove. A through-tube 14 is provided in the middle of the support base 1, passing through the connecting groove. A coil 5 is wound around the outer side of the through-tube 14. Furthermore, an insulating wrapping 51 is wrapped around the outer side of the coil 5, and the insulating wrapping 51 is made of PVC or PE. One or more combinations of PTFE are used. Several lead pins 12 are sequentially connected to one end of the winding wire of the coil 5, so that different lead pins 12 can be used to realize the circuit of the coil 5. The number of lead pins 12 is not unique and depends on the actual situation. Two sets of symmetrically arranged magnetic core blocks 3 are provided on both sides of the support base 1. The magnetic core blocks 3 have a C-shaped structure. A magnetic core column 31 is provided in the middle of the concave side of the magnetic core block 3. One magnetic core column 31 passes through the middle of the through tube 14, and the other magnetic core column 31 passes through the middle of the connecting groove and abuts against the inner bend side of the movable copper busbar 4. The two sets of magnetic core columns 31 abut against each other.

[0025] Beneficially, the connecting groove includes an inlet movable groove 15 and a fixed groove 16 located at the center of the support base 1. The movable groove 15 has a rectangular groove structure, and the fixed groove 16 has a dish-shaped groove structure. The movable groove 15 and the fixed groove 16 are interconnected, forming a mushroom-shaped structure. The fixed groove 16 is penetrated by the magnetic core post 31. At the same time, the movable copper bus 4 is bent in planar shape. The bent projection of the movable copper bus 4 also has a mushroom-shaped structure. This makes it easy to squeeze the two ends of the movable copper bus 4. The protrusion in the middle of the movable copper bus 4 becomes elliptical and enters the movable groove 15 and is left in the fixed groove 16. After that, the movable copper bus 4 is released and elastically deformed to return to its original shape. The middle part of the movable copper bus 4 is fixed by the fixed groove 16 to prevent it from falling off. Beneficially, the connecting groove is filled with fixing glue, which further fixes it and facilitates heat dissipation.

[0026] Beneficially, the two sets of magnetic core blocks 3 are provided with fixing rings 2 on the outside, which wrap around and assist the two sets of magnetic core blocks 3 to abut against each other.

[0027] Beneficially, a constraint plate 13 is provided between the end of the through tube 14 and the adjacent magnetic core block 3. The constraint plate 13 is used to prevent the winding of the coil 5 from falling off.

[0028] Working principle of this utility model:

[0029] The operator first uses the movable slot 15 and the fixed slot 16 to fix the movable copper busbar 4 into the support base 1, then winds the coil 5 onto the surface of the through tube 14 and connects the lead pin 12. Then, the movable copper busbar 4 and the coil 5 are clamped and fixed using the magnetic core column 31 in the middle of the two sets of magnetic core blocks 3. After completion, the insulating wrapping 51 of the coil 5 and the fixing ring 2 of the magnetic core block 3 are wrapped to realize the installation of the equipment structure. The process is simple and effectively realizes the precise positioning of the magnetic core column 31 in the middle of the magnetic core block 3, increases the gap between the magnetic core and the coil 5, increases the heat dissipation area and improves the service life, while reducing the structural volume and making it suitable for different scenarios.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A small patch current transformer, characterized in that: The system includes a support base (1), one side of which has a connecting groove. A movable copper busbar (4) is installed in the connecting groove. The movable copper busbar (4) is bent in the middle and passes into the connecting groove. Several lead pins (12) are provided on the side of the support base (1) away from the opening where the connecting groove is located. A through tube (14) is provided in the middle of the support base (1). The through tube (14) passes through the connecting groove. A coil (5) is wound around the outer side of the through tube (14). Several lead pins The foot (12) is sequentially connected to one end of the winding wire of the coil (5). The support base (1) has two sets of symmetrically arranged magnetic core blocks (3) on both sides. The magnetic core blocks (3) have a C-shaped structure. The magnetic core block (3) has a magnetic core column (31) in the middle of the concave side. One magnetic core column (31) passes through the middle of the through tube (14), and the other magnetic core column (31) passes through the middle of the connecting groove and abuts against the inner bend side of the movable copper busbar (4). The two sets of magnetic core columns (31) abut against each other.

2. The miniature patch transformer according to claim 1, characterized in that: The outer side of the wound coil (5) is wrapped with an insulating wrapping (51).

3. The miniature patch transformer according to claim 2, characterized in that: The insulating wrapping material (51) is one or more of PVC, PE, and PTFE.

4. The miniature patch transformer according to claim 1, characterized in that: The connecting groove includes an inlet movable groove (15) and a fixed groove (16) located at the center of the support base (1). The movable groove (15) has a rectangular groove structure, and the fixed groove (16) has a disc-shaped groove structure. The movable groove (15) and the fixed groove (16) are interconnected and form a mushroom-shaped structure.

5. The miniature patch transformer according to claim 4, characterized in that: The movable copper busbar (4) is bent in the plane, and the projected bending of the movable copper busbar (4) also presents a mushroom-shaped structure.

6. The miniature patch transformer according to claim 1, characterized in that: The two sets of magnetic core blocks (3) are provided with fixing rings (2) on the outside, which wrap around and assist the two sets of magnetic core blocks (3) to abut against each other.

7. The miniature patch transformer according to claim 1, characterized in that: A constraint plate (13) is provided between the end of the through tube (14) and the adjacent magnetic core block (3), the constraint plate (13) being used to prevent the winding of the coil (5) from falling off.

8. The miniature patch transformer according to claim 4, characterized in that: The connecting groove is filled with fixing adhesive.

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