CN212008730U - Self-adhesive coil type current sensor - Google Patents

Abstract

The utility model discloses a self-adhesive coil formula current sensor, be a hollow circular base, a plurality of self-adhesive coil and annular apron including the middle part, circular base separates for even number check space along the circumference, and the check space is circumference symmetric distribution, guarantees its symmetry, prevents position error. Self-adhesive coils are placed in the grid space, and the leading-out wire of each self-adhesive coil is connected through the annular cover plate at the top to form the current sensor. The utility model has the advantages of good consistency; the sensitivity is high, and the method is suitable for automatic batch production; compatible with open-loop structures.

Description

Self-adhesive coil type current sensor

Technical Field

The utility model relates to a current sensor field, in particular to self-adhesive coil formula current sensor.

Background

The traditional hollow coil is also called current measuring coil and differential current sensor, and is a ring coil uniformly wound on non-ferromagnetic material. The output signal is the current differential over time. The phase error of the phase error is almost zero without ferromagnetic materials and hysteresis effect; compared with the traditional mutual inductor with the iron core, the magnetic-field-type mutual inductor has the advantages of wide measurement range, high precision, stability, reliability, wide response frequency band. The following three common preparation methods are available:

1) winding the enameled wire on an annular hard ferromagnetic material framework to form a closed-loop hard hollow coil;

2) winding the enameled wire on a flexible non-ferromagnetic material to form a flexible hollow coil which can be opened;

3) PCB formula stereoplasm air core coil.

The above disadvantages are: the windings on the framework can not be stacked, and the sensitivity is not high; the consistency is poor, and the air-core coil is limited to be widely popularized as a current sensor; the position error is large, and the electromotive force at the opening position generates unbalance; is not suitable for automatic production.

This is where the application needs to be focused on.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a self-adhesive coil formula current sensor of high sensitivity, automated production is to be provided.

In order to solve the technical problem above, the utility model provides a self-adhesive coil formula current sensor, be a hollow circular base, a plurality of self-adhesive coil and annular apron including the middle part, circular base separates for even number check space along the circumference, and the check space is circumference symmetric distribution, guarantees its symmetry, prevents position error. Self-adhesive coils are placed in the grid space, and the leading-out wire of each self-adhesive coil is connected through the annular cover plate at the top to form the current sensor.

The annular cover plate presses the self-adhesive coil below and is fixedly connected with the circular base.

And one end of the self-adhesive coil is connected and fixed with the inner diameter part of the annular cover plate, and the other end of the self-adhesive coil is fixed on the outer diameter part of the annular cover plate.

The self-adhesive coil is formed by winding a wire, the number of winding turns is several times that of the coil wound by the framework, the sensitivity is improved, and the measuring capacity of small current is improved.

The utility model has the advantages that:

1) the lattice space of the utility model is a symmetrical structure, and the consistency is good;

2) the sensitivity is high, and the method is suitable for automatic batch production;

3) the utility model discloses a closed-loop structure, compatible open-loop structure simultaneously.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic overall view of the present invention;

FIG. 2 is an exploded view of FIG. 1;

description of the figures

1-a circular base; 101-lattice space;

2-self-adhesive coil;

201-outer diameter lead-out wire; 202-inner diameter lead-out wire;

3-annular cover plate.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Figure 1 shows a schematic overall appearance of an embodiment of the invention; fig. 2 shows an internal decomposition schematic of an embodiment of the invention. As shown in fig. 1 and fig. 2, the utility model provides a self-adhesive coil formula current sensor, be hollow circular base 1, a plurality of self-adhesive coil 2 and annular cover plate 3 including the middle part, circular base 1 separates for 20 check spaces 101 along the circumference, and check space 101 is circumference symmetric distribution, places a self-adhesive coil 2 in every check space 101, and every is from the 2 both ends of adhesive coil and is drawn forth the line respectively, and one end lead-out wire 202 is connected and is fixed in the microgroove at the inner diameter portion edge of annular cover plate 3, and other end lead-out wire 201 is fixed in the microgroove at the outer diameter portion edge of annular cover plate 3, through each self-adhesive coil 2 of annular cover plate 3 intercommunication, forms current sensor.

The annular cover plate 3 presses the self-adhesive coil 2 below, fixes the self-adhesive coil in the grid space 101, and is clamped and fixed with the circular base 1.

The self-adhesive coil 2 is formed by winding a wire, and can be wound with a plurality of turns which are multiple times of the number of turns of the coil wound by the framework, so that the sensitivity is improved, and the measuring capability of small current is improved.

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 (4)

1. A self-adhesive coil type current sensor is characterized in that: the current sensor comprises a circular base with a hollow middle part, wherein the circular base is divided into an even number of grid spaces along the circumference, self-adhesive coils are placed in the grid spaces, and lead-out wires of the self-adhesive coils are connected through an annular cover plate at the top to form the current sensor.

2. The self-adhesive coil current sensor according to claim 1, characterized in that: the annular cover plate presses the self-adhesive coil below and is fixedly connected with the circular base.

3. The self-adhesive coil current sensor according to claim 1, characterized in that: and one end of the self-adhesive coil is connected and fixed with the inner diameter part of the annular cover plate, and the other end of the self-adhesive coil is fixed on the outer diameter part of the annular cover plate.

4. The self-adhesive coil current sensor according to claim 1, characterized in that: the self-adhesive coil is formed by winding a wire, and the number of winding turns is several times that of the coil wound by the framework.

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