CN211719420U

CN211719420U - Residual current transformer capable of guaranteeing current balance of large perforation size

Info

Publication number: CN211719420U
Application number: CN202020853363.0U
Authority: CN
Inventors: 雷红勇
Original assignee: Beijing Boyuan Huanyu Electronic Technology Co ltd
Current assignee: Beijing Boyuan Huanyu Electronic Technology Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-10-20
Anticipated expiration: 2030-05-20

Abstract

The utility model discloses a residual current transformer for ensuring the current balance of a large perforation size, which comprises a base, wherein the top end of the base is provided with a retainer ring, magnetic cores are arranged in the base and the clamping ring, coils are arranged on the magnetic cores in a crosstalk mode, an inner shielding layer is arranged on the inner side of each magnetic core, an outer shielding layer is arranged on the outer side of the magnetic core, side shielding layers are symmetrically arranged on two sides of the inner shielding layer and the outer shielding layer, the thickness of the inner shielding layer is larger than that of the outer shielding layer, and the inner shielding layer, the outer shielding layer and the side shielding layer are made of high-quality silicon steel sheets, so that the utility model solves the problems that the prior current transformer is easy to have uneven magnetic permeability or unbalanced magnetic circuit, by improving and optimizing the structure of the current transformer, the shielding layer is added in the current transformer, therefore, the problem that the magnetic field generated by the current difference in the wire easily causes the uneven permeability or the unbalanced magnetic circuit of the current transformer is solved.

Description

Residual current transformer capable of guaranteeing current balance of large perforation size

Technical Field

The utility model relates to a mutual-inductor technical field specifically is a guarantee residual current transformer of big perforation size current balance nature.

Background

When a large current flows near the current transformer or a strong magnet exists, the external factors can generate an additional magnetic field in the magnetic core, so that the balance of the residual current transformer is deteriorated. The anti-electromagnetic interference capability of the current transformer is influenced by the transformation ratio of a coil winding of the transformer, a magnetic core material and coil shielding; however, the existing current transformer has the following problems: the shielding structure of the existing current transformer is simple, only the metal shielding is added in the magnetic core coil, the interference of the external magnetic field to the self can not be blocked, the shielding effect is not ideal, furthermore, the magnetic permeability of each point of the magnetic core of the transformer is not uniform or the magnetic circuit is not balanced, the induced electromotive force is generated in the secondary winding due to the reasons of asymmetry of the relative position of the primary winding and the secondary winding, the balance of the open-type residual current transformer is seriously influenced, the current mutual inductance upper magnetic core and the current mutual inductance lower magnetic core are separated, the upper magnetic core is wound firstly during winding, the lower magnetic core is wound secondly, the winding mode is time-consuming and labor-consuming, the winding direction is easy

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a guarantee residual current transformer of big perforation size current balance nature aims at improving the current transformer and appears the inhomogeneous or unbalanced problem of magnetic permeability easily.

The utility model discloses a realize like this:

a residual current transformer capable of guaranteeing current balance of a large perforation size comprises a base, wherein a clamping ring is arranged at the top end of the base, magnetic cores are arranged inside the base and the clamping ring, coils are subjected to crosstalk on the magnetic cores, an inner shielding layer is arranged on the inner side of each magnetic core, an outer shielding layer is arranged on the outer side of each magnetic core, side shielding layers are symmetrically arranged on two sides of each inner shielding layer and each outer shielding layer, the thickness of each inner shielding layer is larger than that of each outer shielding layer, the inner shielding layers, the outer shielding layers and the side shielding layers are made of high-quality silicon steel sheets, and the clamping ring and the base are connected together through connecting bolts; the base is convenient for cooperate the complete mutual-inductor of rand equipment, the installation and the dismantlement of the mutual-inductor of being convenient for, the magnetic core is convenient for to the cooperation coil, thereby make things convenient for the mutual-inductor to exert effectual effect, the internal shield layer, external shield layer and side shield layer are the omnidirectional of being convenient for shield the magnetic core, avoid the magnetic core to be influenced by the magnetic field that the electric current produced easily, the thickness on internal shield layer is greater than the interference intensity that the thickness messenger magnetic core inside received of external shield layer is big, consequently survey in the magnetic core and need increase interference killing feature, the internal shield layer, the material on external shield layer and side shield layer is because the silicon steel sheet has good shielding magnetic field's effect, connecting bolt is convenient for link together base and rand.

Furthermore, connecting pins are symmetrically arranged on two sides of the bottom end of the arc side surface of the base, and connecting holes are formed in the connecting pins; the connection foot is convenient for the installation and the fixation of whole mutual-inductor, is convenient for the use of whole mutual-inductor, and the connecting hole is convenient for the bolt to pass to conveniently install and fix the mutual-inductor through the bolt.

Further, the inner side of the base is provided with rubber surfaces along the outer sides of the inner shielding layer, the outer shielding layer and the side shielding layer, and connectors are symmetrically arranged at the positions, close to the top ends, of the two sides of the arc side surface of the base; the glue surface is convenient for the sufficient stability of magnetic core and inner shield layer, outer shielding layer and side shielding layer, the stable in structure of the whole mutual inductor of being convenient for, the connector is convenient for the base and the rand link together, the base cooperation rand of being convenient for makes up into complete mutual inductor.

Furthermore, wiring boards are arranged at the positions, close to the top end, of the base along the front and the rear of the connector, and wiring terminals are arranged on the wiring boards; the wiring board is convenient for cooperate the winding coil on the magnetic core to make things convenient for external conductor to be connected through wiring board and terminal and inner coil, the terminal is convenient for connect and be fixed to outside wire.

Furthermore, the top end of the arc side surface of the clamping ring is provided with a top head, the rest structures of the clamping ring except the clamping ring without connecting pins are the same as those of the base, and a magnetic core, an inner shielding layer, an outer shielding layer and a side shielding layer are also arranged in the clamping ring; the structure is convenient for the clamping ring to be matched with the base, so that the whole mutual inductor can be conveniently assembled and mutually matched for use, mutual inductance can be greatly convenient to install and use, and the mutual inductor can be conveniently and stably matched with other electrical elements for use.

Furthermore, the two magnetic cores are of an integral structure before being cut, the coil is wound on the magnetic cores before the magnetic cores are cut, the notch of the magnetic cores is skipped in the winding process of the coil, and the magnetic cores and the coil are cut off after the coil is wound; the mode of winding the coil avoids the wrong winding direction and improves the working efficiency.

With pedestal mounting in the position that corresponds during the use, then link together base and rand with the rand card at the base top and through the bolt, later utilize the wire to link together the terminal that corresponds and the electrical components that correspond can normal use, shield the magnetic field that can effectual outside wire produced under the effect of internal shield layer, outer shielding layer and side shielding layer, avoid the inhomogeneous or unbalanced problem of magnetic circuit of magnetic permeability to appear in the mutual-inductor.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a structure to current transformer improves and optimizes for the inside shielding layer that increases of current transformer, thereby avoid the magnetic field of the poor production of wire internal current to cause current transformer easily and the inhomogeneous or unbalanced problem of magnetic circuit of magnetic permeability appears, and this kind of current transformer conveniently attaches the coil and twines, avoids the too troublesome problem of coil winding.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of the transformer of the present invention at a first viewing angle;

fig. 2 is a schematic structural diagram of the transformer of the present invention at a second viewing angle;

fig. 3 is a schematic structural diagram of the transformer of the present invention at a third viewing angle;

fig. 4 is a schematic structural view of the base of the present invention;

fig. 5 is a schematic structural view of the collar of the present invention;

in the figure: 1-a base; 11-connecting feet; 12-a connection hole; 13-a connector; 14-patch panel; 141-a binding post; 2-a collar; 21-a plug; 3-connecting bolts; 4-a magnetic core; 41-inner shielding layer; 42-outer shield layer; 43-side shielding layer; 5-coil.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

Example (b): referring to fig. 1, 2, 3 and 4: a residual current transformer capable of guaranteeing current balance of large perforation size comprises a base 1, wherein a clamping ring 2 is arranged at the top end of the base 1, magnetic cores 4 are arranged inside the base 1 and the clamping ring 2, coils 5 are arranged on the magnetic cores 4 in a crosstalk mode, an inner shielding layer 41 is arranged on the inner side of each magnetic core 4, an outer shielding layer 42 is arranged on the outer side of each magnetic core 4, side shields 43 are symmetrically arranged on two sides of each of the inner shielding layer 41 and the outer shielding layer 42, the thickness of each inner shielding layer 41 is larger than that of each outer shielding layer 42, the inner shielding layer 41, the outer shielding layer 42 and the side shields 43 are made of high-quality silicon steel sheets, and the clamping ring 2 is connected with the base 1 through a; the base 1 is convenient for being matched with the retainer ring 2 to assemble a complete mutual inductor, the mutual inductor is convenient to install and disassemble, the magnetic core 4 is convenient for being matched with the coil 5, so that the mutual inductor can play an effective role conveniently, the inner shielding layer 41, the outer shielding layer 42 and the side shielding 43 are convenient for shielding the magnetic core 4 in an all-around mode, the magnetic core 4 is prevented from being easily influenced by a magnetic field generated by current, the thickness of the inner shielding layer 41 is larger than that of the outer shielding layer 42, so that the interference strength in the magnetic core 4 is high, the inner side of the magnetic core 4 needs to be increased in an anti-interference mode, the inner shielding layer 41, the outer shielding layer 42 and the side shielding 43 are made of high-quality silicon steel sheets, and the base 1 and the retainer ring 2 are convenient to connect together through the connecting bolt 3; the structure enables the shielding layer to be added in the current transformer, so that the problem that the magnetic permeability of the current transformer is uneven or the magnetic circuit is unbalanced due to the fact that a magnetic field generated by current difference in the wire is easily avoided, the current transformer is convenient to wind with the coil 5, and the problem that the national language wound by the coil 5 is troublesome is avoided.

Referring to FIG. 4: connecting pins 11 are symmetrically arranged on two sides of the bottom end of the arc side surface of the base 1, and connecting holes 12 are arranged on the connecting pins 11; the connecting pins 11 are convenient for installation and fixation of the whole transformer and use of the whole transformer, and the connecting holes 12 are convenient for bolts to pass through, so that the transformer is convenient to install and fix through the bolts; the inner side of the base 1 is provided with rubber surfaces along the outer sides of the inner shielding layer 41, the outer shielding layer 42 and the side shielding 43, and the two sides of the arc side surface of the base 1 are symmetrically provided with connectors 13 near the top end; the glue surface is convenient for the magnetic core 4, the inner shielding layer 41, the outer shielding layer 42 and the side shielding 43 to be stable enough, so that the structure of the whole transformer is stable, the connecting head 13 is convenient for the base 1 and the clamping ring 2 to be connected together, and the base 1 is convenient to be matched with the clamping ring 2 to be combined into a complete transformer; wiring boards 14 are arranged at the positions, close to the top end, of the base 1 along the front and the rear of the connector 13, and wiring posts 141 are arranged on the wiring boards 14; the terminal plate 14 is convenient to be matched with the coil 5 wound on the magnetic core 4, so that an external wire can be connected with the internal coil 5 through the terminal plate 14 and the terminal 141, and the terminal 141 is convenient to be connected and fixed with an external wire.

Referring to fig. 4 and 5: the top end of the arc side face of the clamping ring 2 is provided with a top 21, the rest structures of the clamping ring 2 except the clamping ring which is not provided with the connecting pin 11 are the same as those of the base 1, and the clamping ring 2 is also internally provided with a magnetic core 4, an inner shielding layer 41, an outer shielding layer 42 and a side shielding 43; the structure is convenient for the clamping ring 2 to be matched with the base 1, so that the whole mutual inductor can be conveniently assembled and mutually matched for use, mutual inductance can be greatly convenient to install and use, and the mutual inductor can be conveniently and stably matched with other electrical elements for use.

The two magnetic cores 4 are of an integral structure before being cut, the coil 5 is wound on the magnetic cores 4 before the magnetic cores 4 are cut, the notch of the magnetic cores 4 is skipped in the winding process of the coil 5, and the magnetic cores 4 and the coil 5 are cut after the coil 5 is wound; winding the coil 5 in this manner can avoid a wrong winding direction and improve work efficiency.

The using method comprises the following steps: install base 1 in the position that corresponds during the use, then link together base 1 and rand 2 at base 1 top and through the bolt with rand 2 card, later utilize the wire to link together corresponding terminal 141 and the electrical components that correspond can normal use, can effectually shield the magnetic field that outside wire produced at internal shield layer 41, outer shielding layer 42 and side shield 43's action line, avoid the mutual-inductor to appear the inhomogeneous or unbalanced problem of magnetic permeability.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a guarantee residual current transformer of big perforation size current balance nature which characterized in that: including base (1), base (1) top is equipped with rand (2), and base (1) inside and rand (2) inside all is equipped with magnetic core (4), crosstalk has coil (5) on magnetic core (4), magnetic core (4) inboard is equipped with internal shield layer (41), the magnetic core (4) outside is equipped with external shield layer (42), internal shield layer (41) and external shield layer (42) bilateral symmetry are equipped with side shield layer (43), the thickness of internal shield layer (41) is greater than external shield layer (42), internal shield layer (41) external shield layer (42) and the material of side shield layer (43) are high-quality silicon steel sheet, link together through connecting bolt (3) between rand (2) and base (1).

2. The residual current transformer for ensuring the current balance of the large perforation size is characterized in that the two sides of the bottom end of the arc-shaped side surface of the base (1) are symmetrically provided with connecting pins (11), and the connecting pins (11) are provided with connecting holes (12).

3. The residual current transformer capable of ensuring the current balance of the large through hole size is characterized in that the inner side of the base (1) is provided with glue surfaces along the outer sides of the inner shielding layer (41), the outer shielding layer (42) and the side shielding layer (43), and the two sides of the arc side surface of the base (1) are symmetrically provided with connectors (13) at positions close to the top end.

4. The residual current transformer for ensuring the current balance of the large perforation size is characterized in that the base (1) is provided with wiring boards (14) at the positions close to the top end along the front and the rear of the connecting head (13), and the wiring boards (14) are provided with wiring posts (141).

5. The residual current transformer for ensuring the current balance of the large through hole size is characterized in that a top head (21) is arranged at the top end of the arc side surface of the clamping ring (2), the clamping ring (2) has the same structure as the base (1) except that the connecting pin (11) is not arranged, and a magnetic core (4), an inner shielding layer (41), an outer shielding layer (42) and a side shielding layer (43) are also arranged inside the clamping ring (2).

6. The residual current transformer for ensuring the current balance of the large perforation size according to claim 5, wherein the two magnetic cores (4) are of an integral structure before being cut, the coil (5) is wound on the magnetic cores (4) before the magnetic cores (4) are cut, the cut of the magnetic cores (4) is skipped during the winding process of the coil (5), and the magnetic cores (4) and the coil (5) are cut after the coil (5) is wound.