CN216595280U

CN216595280U - Hall current sensor

Info

Publication number: CN216595280U
Application number: CN202122934697.8U
Authority: CN
Inventors: 张宁; 齐新新; 黄志毅
Original assignee: Shanghai Xixing Technology Co ltd
Current assignee: Shanghai Xixing Technology Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-05-24
Anticipated expiration: 2031-11-26

Abstract

The utility model provides a Hall current sensor, comprising: the magnetic circuit comprises a base, a top cover, an annular magnetic ring, a Hall element and a circuit board; the top cover is arranged on the base, and a cavity is formed between the top cover and the base; the annular magnetic ring, the Hall element and the circuit board are arranged in the cavity; the base is fixedly connected with one side of the annular magnetic ring, and the Hall element is fixedly installed on the base; the other side of the annular magnetic ring is fixedly connected with one side of the circuit board, and the other side of the circuit board faces the top cover. This device simple structure connects from top to bottom through various draw-in groove buckles and connects, is convenient for install and later stage maintenance.

Description

Hall current sensor

Technical Field

The utility model relates to the field of electronic component structures, in particular to a Hall current sensor.

Background

With the expansion of population and urban construction scale, electrical equipment and power consumption of modern society are more and more, and corresponding urban power supply equipment is often overloaded, the power supply environment is worse and worse, and the problem is more and more serious. The current power state is detected in real time, and when over-current, over-voltage and other hazards occur, sensing detection, sensing sampling, sensing protection and the like become the current power application development trend, so that real-time detection of the power supply environment also occurs at the same time; however, the conventional sensor has the problems of large volume, difficulty in installation, low precision and the like, and further solving the problems is a relatively difficult problem at present.

Patent document CN109917163A discloses a hall current sensor, which comprises a housin, be equipped with annular installation department and circuit board in the casing, be equipped with annular iron core on the annular installation department, annular iron core winds the coil outward and is equipped with a breach, be equipped with hall element in the breach, hall element, the coil all is connected with the circuit board electricity, the casing is drawn forth the wiring through a row of needle to the circuit board, still be equipped with cooling device in the casing, cooling device includes the semiconductor refrigeration piece, the cooling ring, temperature sensor, treater and power regulator, the semiconductor refrigeration piece splices through heat conduction silicone grease with the cooling ring, temperature sensor, power regulator, the semiconductor refrigeration piece all is connected with the treater electricity, the treater still is connected with the circuit board electricity. The cooling device is added in the traditional Hall current sensor, but the problems of large volume, difficult installation, low precision and the like cannot be solved.

Patent document CN201145706Y proposes a hall current sensor including: the annular insulating shell is provided with an annular space for the wire to be tested to penetrate through; the annular iron core with the gap is packaged in the insulating shell, and the inner side wall of the ring of the annular iron core surrounds the inner side wall of the ring of the insulating shell; the Hall device is arranged at the gap of the annular iron core; a circuit board carrying a detection circuit, which is electrically connected with the Hall device; and the shielding ring is encapsulated in the insulating shell, is positioned on the inner side of the ring inner side wall of the annular iron core and surrounds the ring inner side wall of the insulating shell. The patent adds the shielding ring in traditional hall current sensor, but fails to solve the problems of large volume, difficult installation, low precision and the like.

SUMMERY OF THE UTILITY MODEL

In view of the shortcomings in the prior art, it is an object of the present invention to provide a hall current sensor.

According to the present invention, there is provided a hall current sensor comprising: the magnetic circuit comprises a base, a top cover, an annular magnetic ring, a Hall element and a circuit board;

the top cover is arranged on the base, and a cavity is formed between the top cover and the base;

the annular magnetic ring, the Hall element and the circuit board are arranged in the cavity;

the base is fixedly connected with one side of the annular magnetic ring, and the Hall element is fixedly installed on the base;

the other side of the annular magnetic ring is fixedly connected with one side of the circuit board, and the other side of the circuit board faces the top cover.

Preferably, one end of the base is provided with a round bottom surface;

the circular edge of the circular bottom surface extends out of an annular side edge towards one side;

and a central cylinder extends from the middle part of the circular bottom surface to one side of the annular side edge.

Preferably, a base boss is arranged on one side, facing the annular side edge, of the circular bottom surface;

and the central cylinder is provided with a clamping groove.

Preferably, the annular magnetic ring is sleeved on the central cylinder in a surrounding manner;

the annular magnetic ring is provided with an opening, and the opening is arranged on the base boss in a avoiding mode and is limited through the base boss.

Preferably, an inner buckle is arranged at the clamping groove, and the opening and the clamping groove are clamped with the top cover through the inner buckle.

Preferably, a plurality of annular bulges are arranged on the inner side of the annular side edge;

the outer side of the annular magnetic ring is limited by the annular bulge.

Preferably, the hall element is mounted on the base boss.

Preferably, a waist hole is arranged on the circuit board;

a square bulge extends from one side of the top cover, which faces the annular magnetic ring, and a long waist-shaped bulge extends from one side of the square bulge, which faces back to the top cover;

the long waist-shaped bulge penetrates through the waist hole and presses the annular magnetic ring, and the square bulge presses the circuit board.

Preferably, a terminal is arranged on one side of the circuit board, which faces away from the annular magnetic ring.

Preferably, a plurality of first notches are formed in one side, back to the circular bottom surface, of the annular side edge;

the top cap sets up a plurality of second notches, the top cap passes through first notch cooperation the second notch joint the base.

Compared with the prior art, the utility model has the following beneficial effects:

1. the device has small and exquisite appearance, is convenient to install and can be suitable for various occasions;

2. the device has simple structure, the upper and lower connection is connected by various clamping grooves and buckles, and the installation and later-period maintenance are convenient;

3. according to the device, the Hall element is placed at the opening of the annular magnetic ring, so that the testing precision of the Hall element is improved.

Drawings

Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic diagram of an axial measurement structure of a Hall current sensor;

FIG. 2 is a front view of the Hall current sensor after the top cover is removed;

FIG. 3 is a front view of the Hall current sensor without the circuit board;

FIG. 4 is a side view of a Hall current sensor;

FIG. 5 is a schematic diagram of the internal structure of the Hall current sensor;

fig. 6 is a schematic view of a base structure.

Shown in the figure:

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the utility model. All falling within the scope of the present invention.

Example 1

As shown in fig. 1 to 5, a hall current sensor includes: the magnetic circuit comprises a base 1, a top cover 2, an annular magnetic ring 3, a Hall element 4 and a circuit board 5; the base 1 is provided with the top cover 2 and forms a cavity with the top cover 2, the cavity is internally provided with the annular magnetic ring 3, the Hall element 4 and the circuit board 5, the base 1 is fixedly connected with one side of the annular magnetic ring 3, the base 1 is fixedly provided with the Hall element 4, the other side of the annular magnetic ring 3 is fixedly connected with one side of the circuit board 5, and the other side of the circuit board 5 faces the top cover 2. The circuit board 5 is provided with a waist hole, one side of the top cover 2, which faces the annular magnetic ring 3, is extended with a square bulge 22, the side of the square bulge 22, which faces away from the top cover 2, is extended with a long waist-shaped bulge 21, the long waist-shaped bulge 21 penetrates through the waist hole and compresses the annular magnetic ring 3, and the square bulge 22 compresses the circuit board 5. The circuit board 5 is provided with a terminal 6 at one side back to the annular magnetic ring 3.

As shown in fig. 6, one end of the base 1 is a circular bottom, a circular side of the circular bottom extends to one side, and a central cylinder extends from the middle of the circular bottom to one side of the circular side. Circular bottom surface sets up base boss 12 towards annular side one side, sets up draw-in groove 11 on the central cylinder.

Annular magnetic ring 3 encircles the suit on central cylinder, and annular magnetic ring 3 sets up the opening, and the opening is kept away a base boss 12 and is spacing through base boss 12, and draw-in groove 11 department sets up interior buckle, and opening and draw-in groove 11 pass through interior buckle joint top cap 2. A plurality of annular bulges are arranged on the inner side of the annular side edge, and the outer side of the annular magnetic ring 3 is limited by the annular bulges. The hall element 4 is mounted on the base boss 12. Annular side circular bottom surface one side dorsad sets up a plurality of first notches, and top cap 2 sets up a plurality of second notches, and top cap 2 cooperates second notch joint base 1 through first notch.

Example 2

Example 2 is a preferred example of example 1.

As shown in fig. 1 to 6, the present embodiment provides a hall current sensor, which mainly includes: base 1, top cap 2, annular magnetic ring 3, hall element 4, circuit board 5 and terminal 6. The base 1 is provided with a clamping groove 11 which is attached to an opening of the annular magnetic ring 3, so that the annular magnetic ring 3 can be inserted smoothly; the annular bulge is arranged in the base 1, so that the position of the annular magnetic ring 3 can be limited, and the annular magnetic ring 3 is prevented from shaking to damage the Hall element 4; the circuit board 5 is provided with a long waist hole, the top cover 2 extends outwards to form two layers of bosses, wherein the long waist-shaped bulge 21 penetrates through the circuit board 5 to directly press the annular magnetic ring 3, and the square bulge 22 presses the circuit board 5.

Four first notches are formed in the base 1, four second notches are formed in the top cover 2, the base 1 and the top cover 2 can be clamped through the first notches and matched with the second notches, the first notches and the second notches are small, a thin wrench can be used for opening in the later period, the base can be disassembled, and the base is convenient to overhaul when problems occur in the later period. The Hall element 4 is arranged in the opening of the annular magnetic ring 3, when current passes through the opening, the annular magnetic ring 3 generates a magnetic field, and an amplification result can be measured and output through the opening at the Hall element 4, so that the precision is greatly improved.

In conclusion, the embodiment has the advantages of simple structure, convenient assembly and disassembly and convenient later maintenance; the device has the advantages of small volume and flexible installation, and can measure multiple harmonics according to the existing Hall effect principle, amplify the result and greatly improve the precision.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the utility model. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. A hall current sensor, comprising: the magnetic circuit comprises a base (1), a top cover (2), an annular magnetic ring (3), a Hall element (4) and a circuit board (5);

the top cover (2) is arranged on the base (1) and forms a cavity with the top cover (2);

the annular magnetic ring (3), the Hall element (4) and the circuit board (5) are arranged in the cavity;

the base (1) is fixedly connected with one side of the annular magnetic ring (3), and the Hall element (4) is fixedly installed on the base (1);

the other side of the annular magnetic ring (3) is fixedly connected with one side of the circuit board (5), and the other side of the circuit board (5) faces the top cover (2).

2. The hall current sensor of claim 1 wherein: one end of the base (1) is arranged to be a round bottom surface;

3. The hall current sensor of claim 2 wherein: a base boss (12) is arranged on one side, facing the annular side edge, of the circular bottom surface;

the central cylinder is provided with a clamping groove (11).

4. The hall current sensor of claim 3 wherein: the annular magnetic ring (3) is sleeved on the central cylinder in a surrounding manner;

the annular magnetic ring (3) is provided with an opening, and the opening is arranged on the base boss (12) in a avoiding way and is limited by the base boss (12).

5. The hall current sensor of claim 4 wherein: the clamping groove (11) is provided with an inner buckle, and the opening is connected with the top cover (2) in a clamping mode through the inner buckle in the clamping groove (11).

6. The hall current sensor of claim 2 wherein: a plurality of annular bulges are arranged on the inner side of the annular side edge;

the outer side of the annular magnetic ring (3) is limited by the annular bulge.

7. The hall current sensor of claim 3 wherein: the Hall element (4) is installed on the base boss (12).

8. The hall current sensor of claim 1 wherein: a waist hole is formed in the circuit board (5);

a square bulge (22) extends from one side of the top cover (2) facing the annular magnetic ring (3), and a long waist-shaped bulge (21) extends from one side of the square bulge (22) back to the top cover (2);

the long waist-shaped bulge (21) penetrates through the waist hole and presses the annular magnetic ring (3), and the square bulge (22) presses the circuit board (5).

9. The hall current sensor of claim 1 wherein: and one side of the circuit board (5) back to the annular magnetic ring (3) is provided with a terminal (6).

10. The hall current sensor of claim 2 wherein: a plurality of first notches are formed in one side, back to the circular bottom surface, of the annular side edge;

the top cover (2) is provided with a plurality of second notches, and the top cover (2) is matched with the second notches in a clamped mode and is connected with the base (1) through the first notches.