A current transformer with a skeleton integrated barrier

Abstract

The utility model relates to a current transformer of skeleton integrated retaining wall relates to technical field, the technical scheme who adopts includes insulation skeleton, magnetic core and winding, insulation skeleton includes winding part, two magnetic core support, magnetic core positioning slot and magnetic column slot, winding part both ends are provided with retaining wall, and winding part, retaining wall, magnetic core support integrated molding, two magnetic core supports all are provided with winding positioning slot towards each other side, magnetic core is closed magnetic circuit and is connected in magnetic core positioning slot, and the magnetic column of magnetic core is inserted in magnetic column slot, winding includes secondary winding and primary winding, and secondary winding is between two retaining walls, primary winding is U type single turn winding, and primary winding both sides are provided with extension, and extension cooperations with winding positioning slot, the utility model discloses primary winding through extension fixed in insulation skeleton, and secondary winding is wound between two retaining walls, and retaining wall increases the creeping distance between two windings, and production step is simple, and it is favorable to realize full automation production.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, and in particular to a current transformer with a frame-integrated retaining wall. Background Technology

[0002] Current transformers are instruments that convert a large primary current into a small secondary current based on the principle of electromagnetic induction. Their basic structure includes a frame, a magnetic core, a primary winding, and a secondary winding. To improve the insulation between the primary and secondary windings, current technology requires manual application of insulating components to achieve physical isolation. This method cannot be fully automated for mass production, increasing material and labor costs and posing a risk of product failure due to incomplete insulation. Meanwhile, with the rapid development of fields such as new energy vehicle motor controllers and high-frequency switching power supplies, current transformers need to achieve high current carrying capacity and high insulation within the smallest possible size. Currently, there are two methods for installing the primary winding: one is to use a split copper sheet bent and laser-welded to form the primary winding, and the other is to pre-embed the primary winding inside the frame. Both methods involve cumbersome processing steps. Utility Model Content

[0003] To address the problems of cumbersome primary winding installation methods and manual application of insulating sheets for physical isolation in existing technologies, this utility model provides a current transformer with an integrated frame retaining wall.

[0004] This utility model provides the following technical solution: a current transformer with an integrated retaining wall, comprising:

[0005] An insulating frame includes a winding section, two magnetic core supports respectively disposed at both ends of the winding section, magnetic core positioning grooves disposed on the magnetic core supports, and magnetic post slots penetrating the magnetic core supports and the winding section; both ends of the winding section are provided with baffles, so that the winding section, baffles, and magnetic core supports form a stepped structure, and the winding section, baffles, and magnetic core supports are integrally formed; both of the two magnetic core supports are provided with winding positioning grooves on one side facing each other;

[0006] The magnetic core is snapped into the magnetic core positioning groove, and the magnetic core's magnetic post is inserted into the magnetic post slot;

[0007] The winding includes a multi-turn secondary winding wound on the winding portion and a primary winding disposed outside the secondary winding; the secondary winding is located between the two retaining walls; the primary winding is a U-shaped single-turn winding, and extension portions are provided on both sides of the primary winding, the extension portions cooperating with the winding positioning groove.

[0008] Preferably, the magnetic core positioning groove includes a horizontal groove and a vertical groove arranged vertically, and both the horizontal groove and the vertical groove are connected to the magnetic post slot.

[0009] Preferably, the magnetic core includes a first magnetic core and a second magnetic core respectively disposed in the vertical slots of two magnetic core supports, the first magnetic core and the second magnetic core are spliced ​​into a U-shaped structure, and the magnetic posts of the first magnetic core and the second magnetic core are inserted into the magnetic post slots.

[0010] Preferably, the magnetic core support is further provided with two secondary winding pins, and a winding limiting groove is provided between the two secondary winding pins.

[0011] The beneficial effects of this utility model are: the primary winding is fixed to the insulating frame through the extension, and the secondary winding is wound between the two retaining walls. The retaining walls increase the creepage distance between the two windings, which meets the safety requirements; the winding part, retaining walls, and magnetic core support are integrally formed, avoiding the risk of insulation failure caused by manual omission of insulating parts; the production steps are simple, which is conducive to realizing fully automated production. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of one embodiment of a current transformer.

[0013] Figure 2 This is an exploded view of one embodiment of a current transformer.

[0014] Figure 3 This is a cross-sectional view of one embodiment of a current transformer.

[0015] Reference numerals: 11. Winding section; 12. Core support; 13. Magnetic column slot; 14. Horizontal slot; 15. Vertical slot; 16. Winding positioning slot; 17. Secondary winding pin; 18. Barrier; 21. First magnetic core; 22. Second magnetic core; 31. Primary winding; 32. Extension section. Detailed Implementation

[0016] The embodiments of this utility model will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement them after reading this specification. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0017] This utility model provides, for example Figure 1-3 The current transformer shown is a type of frame-integrated barrier current transformer, which includes an insulating frame, a magnetic core, and windings.

[0018] The insulating frame is made of insulating material and includes a winding section 11 for winding the coil, two magnetic core supports 12 respectively disposed at both ends of the winding section 11, magnetic core positioning grooves disposed on the magnetic core supports 12, and magnetic post slots 13 penetrating the magnetic core supports 12 and the winding section 11. The magnetic core positioning grooves include vertically disposed horizontal grooves 14 and vertical grooves 15, which are used to install different types of magnetic cores, and both horizontal grooves 14 and vertical grooves 15 are connected to the magnetic post slots 13, so that magnetic posts of different types of magnetic cores can be inserted into the magnetic post slots 13. Each of the two magnetic core supports 12 is provided with a winding positioning groove 16 facing each other to fix the primary winding 31. One magnetic core support 12 is also provided with two secondary winding pins 17, and a winding limiting groove is provided between the two secondary winding pins 17, through which the two ends of the secondary winding can pass and be electrically connected to the secondary winding pins 17 respectively.

[0019] The magnetic core is a closed magnetic circuit and is snapped into the magnetic core positioning groove. In this embodiment, the magnetic core includes a first magnetic core 21 and a second magnetic core 22 respectively disposed in the vertical grooves 15 of the two magnetic core supports 12. The first magnetic core 21 and the second magnetic core 22 are spliced ​​into a U-shaped structure, and the magnetic posts of the first magnetic core 21 and the second magnetic core 22 are inserted into the magnetic post slots 13.

[0020] The winding includes a multi-turn secondary winding wound on the winding section 11 and a primary winding 31 disposed outside the secondary winding.

[0021] Both ends of the winding section 11 are provided with retaining walls 18, and the multi-turn secondary winding is located between two retaining walls 18. The primary winding 31 is a U-shaped single-turn winding, and both sides of the primary winding 31 are provided with extensions 32, which are relatively simple to manufacture. The two extensions 32 respectively cooperate with the winding positioning slots 16 on the two magnetic core supports 12 to fix the primary winding 31. The winding section 11, retaining walls 18, and magnetic core supports 12 form a stepped structure, which increases the creepage distance between the primary winding 31 and the secondary winding, improves the insulation performance, and the winding section 11, retaining walls 18, and magnetic core supports 12 are integrally formed, which also avoids the risk of insulation failure caused by manual omission of insulation parts. Furthermore, in production, the secondary winding can be wound between the two retaining walls 18 first, then the primary winding can be installed on the frame, and finally the magnetic core can be assembled. The production steps are relatively simple and conducive to achieving fully automated production.

[0022] The above describes one or more embodiments of this utility model in a relatively specific and detailed manner, but it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A skeleton integrated barrier current transformer, characterized by, include: An insulating frame includes a winding section, two magnetic core supports respectively disposed at both ends of the winding section, magnetic core positioning grooves disposed on the magnetic core supports, and magnetic post slots penetrating the magnetic core supports and the winding section; both ends of the winding section are provided with baffles, so that the winding section, baffles, and magnetic core supports form a stepped structure, and the winding section, baffles, and magnetic core supports are integrally formed; both of the two magnetic core supports are provided with winding positioning grooves on one side facing each other; The magnetic core is snapped into the magnetic core positioning groove, and the magnetic core's magnetic post is inserted into the magnetic post slot; The winding includes a multi-turn secondary winding wound on the winding portion and a primary winding disposed outside the secondary winding; the secondary winding is located between the two retaining walls; the primary winding is a U-shaped single-turn winding, and extension portions are provided on both sides of the primary winding, the extension portions cooperating with the winding positioning groove.

2. A skeleton integrated current transformer according to claim 1, characterized in that, The magnetic core positioning groove includes a horizontal groove and a vertical groove arranged vertically, and both the horizontal groove and the vertical groove are connected to the magnetic column slot.

3. A skeleton integrated current transformer according to claim 2, wherein The magnetic core includes a first magnetic core and a second magnetic core respectively disposed in vertical slots of two magnetic core supports. The first magnetic core and the second magnetic core are spliced ​​into a U-shaped structure, and the magnetic posts of the first magnetic core and the second magnetic core are inserted into the magnetic post slots.

4. The skeleton integrated current transformer of claim 1, wherein, The magnetic core support described above is also provided with two secondary winding pins, and a winding limiting groove is provided between the two secondary winding pins.

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