CN203325703U

CN203325703U - Current mutual inductor

Info

Publication number: CN203325703U
Application number: CN2013204314704U
Authority: CN
Inventors: 范宗爱; 祥祖号
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-07-19
Filing date: 2013-07-19
Publication date: 2013-12-04
Anticipated expiration: 2023-07-19

Abstract

The utility model discloses a current mutual inductor comprising an outer shell, a support tube, a first magnetic core and a second magnetic core. The support tube, the first magnetic core and the second magnetic core are arranged in the outer shell. The outer shell is provided with a through groove used for a conductor to penetrate, a winding is wound on the outer side of the support tube, the two ends of the winding are respectively and electrically connected with a pin, the pins extend out of the outer shell, the first end of the first magnetic core extends into the support tube and is connected with the first end of the second magnetic core in a splicing mode, and the second end of the first magnetic core is connected with the second end of the second magnetic core in a splicing mode. Therefore, by means of arrangement of the support tube, the first magnetic core and the second magnetic core, the winding is wound on the support tube through a machine during assembly, and then the first magnetic core and the second magnetic core are connected in a splicing mode and are arranged on the support tube. Winding manufacturing and assembling are simple and convenient, production efficiency is greatly improved, manufacturing cost is effectively reduced, and market competitiveness of products is enhanced.

Description

Current transformer

Technical field

The utility model relates to the electric component art, refers in particular to a kind of current transformer.

Background technology

High-frequency pulse current transformer is widely used in Switching Power Supply, is generally used for the detection of switching frequency pulse current, as control, driving or guard signal.Pulse current instrument transformer commonly used all adopts toroidal core, while making assembling, by the signal winding technique on magnet ring, the current signal be sampled through on magnet ring around some circles, so just can on the signal winding, obtain the pulsed current signal of needs.

Yet, because magnet ring is a closed loop, coiling signal winding generally only can adopt artificial or expensive loop wire winder coiling, operate extremely loaded down with trivial details and Product Precision is not high, and, when the number of turns of transducer signal winding reaches hundreds of upper circle, artificial or loop wire winder coiling meeting has increased the cost of manufacture of product.

The utility model content

In view of this, the utility model is for the disappearance of prior art existence, its main purpose is to provide a kind of current transformer, and it can effectively solve, and existing current transformer adopts manually or loop wire winder coiling winding makes the problem that Product Precision is not high, cost is high.

For achieving the above object, the utility model adopts following technical scheme:

A kind of current transformer, include shell and be arranged at support tube, the first magnetic core and the second magnetic core in shell; This shell has the groove passed for electric conductor; This support tube is wound with winding outward, and the two ends of this winding are electrically connected with respectively pin, and this pin stretches out outside shell; The first end of the first magnetic core stretches in support tube and is connected with the first end amalgamation of the second magnetic core, and the second end of the first magnetic core closes and is connected with the second end matching of the second magnetic core.

As a kind of preferred version, described groove is through the space of by the first magnetic core and the second magnetic core amalgamation, enclosing structure.

As a kind of preferred version, convex with reference column in described shell, aforementioned groove is arranged on this reference column, forms annular containing cavity between the lateral wall of this reference column and the internal face of shell, and this support tube, the first magnetic core and the second magnetic core are embedded in this annular containing cavity.

As a kind of preferred version, described pin is individually fixed in the two ends of support tube.

As a kind of preferred version, described the first magnetic core and the second magnetic core all are U-shaped, and the space that structure is enclosed in this first magnetic core and the second magnetic core amalgamation is square.

As a kind of preferred version, the first end of the first end of described the first magnetic core and the second magnetic core all stretches in support tube amalgamation each other and is connected.

As a kind of preferred version, described support tube, the first magnetic core, the second magnetic core and winding are fixed in shell by epoxy encapsulation.

As a kind of preferred version, described groove is square, the Width of this groove and the axially parallel of support tube.

As a kind of preferred version, described shell and support tube are plastic cement material.

The utility model compared with prior art has obvious advantage and beneficial effect, particularly, and as shown from the above technical solution:

By being provided with support tube, the first magnetic core and the second magnetic core, during assembling, can adopt common coil winding machine by winding technique on support tube, then the first magnetic core and the second magnetic core amalgamation are connected and be arranged on support tube, winding of the present utility model is without adopting artificial or loop wire winder winding, and production and assembling are easier, have greatly improved production efficiency, and effectively reduce cost of manufacture, strengthened the competitiveness of product in market.

For more clearly setting forth architectural feature of the present utility model and effect, below in conjunction with accompanying drawing and specific embodiment, the utility model is elaborated.

The accompanying drawing explanation

Fig. 1 is the assembling schematic perspective view of the preferred embodiment of the utility model;

Fig. 2 is the exploded view of the preferred embodiment of the utility model;

Fig. 3 is the partial assembly drawing of the preferred embodiment of the utility model;

Fig. 4 is the sectional view of the preferred embodiment of the utility model.

The accompanying drawing identifier declaration:

10, shell 11, groove

12, reference column 13, annular containing cavity

20, support tube 30, the first magnetic core

31, first end 32, the second end

40, the second magnetic core 41, first end

42, the second end 50, winding

60, pin 70, epoxy resin.

Embodiment

Please refer to shown in Fig. 1 to Fig. 4, the concrete structure that it has demonstrated the preferred embodiment of the utility model, include shell 10 and be arranged at support tube 20, the first magnetic core 30 and the second magnetic core 40 in shell 10.

Wherein, this shell 10 is plastic cement material, and this shell 10 has the groove 11 passed for electric conductor, and this groove 11 is through the space of by the first magnetic core 30 and the second magnetic core 40 amalgamations, enclosing structure; In the present embodiment, convex with reference column 12 in this shell 10, aforementioned groove 11 is arranged on this reference column 12, forms annular containing cavity 13 between the internal face of the lateral wall of this reference column 12 and shell 10, and this support tube 20, the first magnetic core 30 and the second magnetic core 40 are embedded in this annular containing cavity 13.And in the present embodiment, as shown in Figure 1, this groove 11 is square, certainly, but this groove 11 also ovalize or " " type etc., not to be limited, the width H direction of this groove 11 and the axially parallel of support tube 20.

This support tube 20 is plastic cement material, outside this support tube 20, is wound with winding 50, is provided with at least two pins 60 on support tube 20, and the two ends of this winding 50 are electrically connected to this two pins 60 respectively.

The first end 31 of this first magnetic core 30 stretches in support tube 20 and is connected with first end 41 amalgamations of the second magnetic core 40, and the second end 32 of the first magnetic core 30 is connected with the second end 42 amalgamations of the second magnetic core 40; Specifically say, in the present embodiment, this first magnetic core 30 and the second magnetic core 40 all are U-shaped, the space that structure is enclosed in this first magnetic core 30 and the second magnetic core 40 amalgamations is square, certainly, this first magnetic core 30 and the second magnetic core 40 also can all be L-type or all be the C type, or wherein a magnetic core is L-type, another magnetic core is I type etc., and the shape of this first magnetic core 30 and the second magnetic core 40 will not limit.And the first end 31 of this first magnetic core 30 and the first end 41 of the second magnetic core 40 all stretch in support tube 20 amalgamation each other and are connected.

And, this support tube 20, the first magnetic core 30, the second magnetic core 40 and winding are fixed in shell 10 by epoxy resin 70 encapsulation, this two pins 60 stretches out outside shell 10, but be not limited to, adopts epoxy resin 70 encapsulation, adopts other modes that they are fixed in shell 10 and also can.

The assembling process that the present embodiment is described in detail in detail is as follows:

During assembling, at first, as shown in Figure 2, winding 50 is around in outside support tube 20, and the two ends of winding 50 are electrically connected to two pins 60 respectively; Then, by the first end 41 of the first end of the first magnetic core 30 31 and the second magnetic core 40, from the two ends of support tube 20, insert in support tube 20 respectively and each other amalgamation be connected, the second end 32 of this first magnetic core 30 and the second end 42 of the second magnetic core 40 also amalgamation are connected (as shown in Figure 3); Then, winding 50, support tube 20, the first magnetic core 30 and the second magnetic core 40 are embedded in the annular containing cavity 13 of shell 10 in the lump, and adopt epoxy resin 70 that winding 50, support tube 20, the first magnetic core 30 and the second magnetic core 40 encapsulation are got final product.

Design focal point of the present utility model is: by being provided with support tube, the first magnetic core and the second magnetic core, during assembling, can adopt common coil winding machine by winding technique on support tube, then the first magnetic core and the second magnetic core amalgamation are connected and be arranged on support tube, winding of the present utility model is without adopting artificial or loop wire winder winding, and production and assembling are easier, have greatly improved production efficiency, and effectively reduce cost of manufacture, strengthened the competitiveness of product in market.

The above, it is only preferred embodiment of the present utility model, not technical scope of the present utility model is imposed any restrictions, therefore any trickle modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done above embodiment, all still belong in the scope of technical solutions of the utility model.

Claims

1. a current transformer, is characterized in that: include shell and be arranged at support tube, the first magnetic core and the second magnetic core in shell; This shell has the groove passed for electric conductor; This support tube is wound with winding outward, and the two ends of this winding are electrically connected with respectively pin, and this pin stretches out outside shell; The first end of the first magnetic core stretches in support tube and is connected with the first end amalgamation of the second magnetic core, and the second end of the first magnetic core closes and is connected with the second end matching of the second magnetic core.

2. current transformer according to claim 1 is characterized in that: described groove is through the space of by the first magnetic core and the second magnetic core amalgamation, enclosing structure.

3. current transformer according to claim 1 and 2, it is characterized in that: in described shell, convex with reference column, aforementioned groove is arranged on this reference column, form annular containing cavity between the lateral wall of this reference column and the internal face of shell, this support tube, the first magnetic core and the second magnetic core are embedded in this annular containing cavity.

4. current transformer according to claim 1, it is characterized in that: described pin is individually fixed in the two ends of support tube.

5. current transformer according to claim 1, it is characterized in that: described the first magnetic core and the second magnetic core all are U-shaped, and the space that structure is enclosed in this first magnetic core and the second magnetic core amalgamation is square.

6. current transformer according to claim 1 is characterized in that: the first end of the first end of described the first magnetic core and the second magnetic core all stretches in support tube amalgamation each other and is connected.

7. current transformer according to claim 1, it is characterized in that: described support tube, the first magnetic core, the second magnetic core and winding are fixed in shell by epoxy encapsulation.

8. current transformer according to claim 1, it is characterized in that: described groove is square, the Width of this groove and the axially parallel of support tube.

9. current transformer according to claim 1, it is characterized in that: described shell and support tube are plastic cement material.