Split type Hall current sensor

Abstract

The utility model discloses a split type Hall current sensor, which comprises a shell, two magnetic cores arranged in the shell, a PCB (Printed Circuit Board) and a shielding frame arranged on the PCB, the shell is divided into a shell upper body and a shell lower body which can be opened and closed, an upper body mounting area and a lower body mounting area are respectively arranged in the shell upper body and the shell lower body, and the upper body mounting area and the lower body mounting area are arranged in the shell. The Hall current sensor comprises an upper body installation area and a lower body installation area, matching assemblies are installed in the upper body installation area and the lower body installation area, two protruding blocks are fixed in each of the upper body installation area and the lower body installation area, and clamping grooves matched with the protruding blocks are formed in the two magnetic cores, so that the magnetic cores can be conveniently positioned and fixed, the magnetic cores are prevented from shifting, and the measurement precision and stability of the Hall current sensor are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of current sensors and relates to a split Hall current sensor. Background Art

[0002] The Hall current sensor is based on the magnetic balance Hall principle. According to the Hall effect principle, current Ic is passed into the control current terminal of the Hall element, and a magnetic field with magnetic induction intensity B is applied in the normal direction of the plane of the Hall element. Then, a potential VH, called the Hall potential, will be generated in the direction perpendicular to the current and the magnetic field (i.e., between the Hall output terminals).

[0003] A Chinese utility model patent with application number 202021021852.6 discloses an open-loop current sensor with excellent large-current balance, including a combination. There are two combinations. Magnetic cores are provided inside both combinations. The two combinations are symmetrically arranged and are connected together by screws. A copper bar is provided at the front end of the combination. Fixing holes are symmetrically provided on both sides of the copper bar. One end of the back of the two combinations is inserted with a Hall element, and the Hall elements of the two combinations are symmetrically arranged. A fixing head is provided at the position of the combination that aligns with the Hall element. The utility model solves the problem that the existing traditional open-loop current sensor has poor balance during the measurement of large currents due to its own principle and structure, seriously affecting the accuracy of the measurement value. By improving and optimizing the structure of the current sensor, the current sensor adopts a split structure and is fixed by bolts, meeting the user's requirement of not needing to disassemble the primary bus during the installation process. There are two magnetic cores in the split Hall current sensor, which are positioned and connected through the combination. However, when the temperature of the Hall current sensor in this technical solution is too high, the combination and the potting glue expand and contract, resulting in a change in the position of the combination and a change in the magnetic core spacing, causing the output signal of the sensor to drift, that is, the output value of the sensor shifts with the change of the ambient temperature, thus affecting the measurement accuracy and stability. Therefore, it is necessary to design a split Hall current sensor to solve the above problems. Summary of the Utility Model

[0004] In view of the above problems, in order to overcome the defects of the prior art, the utility model provides a split Hall current sensor, and the purpose of the utility model is to: facilitate the positioning and fixing of the magnetic core, prevent the magnetic core from shifting, and improve the measurement accuracy and stability of the Hall current sensor.

[0005] To achieve the above object, the technical solution adopted by the present utility model is as follows: The present utility model includes a housing and two magnetic cores, a PCB board and a shielding frame installed in the housing. The housing is divided into an upper housing body and a lower housing body that can be opened and closed. An upper body installation area and a lower body installation area are respectively provided in the upper housing body and the lower housing body. A matching component is installed in the upper body installation area and the lower body installation area. Two bumps are fixed in both the upper body installation area and the lower body installation area. Card slots matching the bumps are provided on both magnetic cores.

[0006] Preferably, the two bumps respectively located in the upper body installation area and the lower body installation area are symmetrically installed.

[0007] Compared with the prior art, the present utility model has the following beneficial effects:

[0008] The mutual cooperation of the bumps and the card slots of the present utility model can fixedly install the magnetic core, prevent the magnetic core from shifting, and ensure the measurement accuracy and stability of the Hall current sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional schematic diagram of the structure of the present utility model.

[0010] Reference numerals: 1 - upper housing body, 2 - lower housing body, 3 - magnetic core, 4 - bump, 5 - card slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0012] Next, in conjunction with the attached Figure 1 A further detailed description will be made of the specific implementation manners of the present utility model.

[0013] In this embodiment, through Figure 1As shown in the figure, the utility model includes a housing and two magnetic cores 3, a PCB board and a shielding frame installed in the housing. The housing is divided into an upper housing body 1 and a lower housing body 2 which are distributed up and down. An upper body installation area and a lower body installation area are respectively arranged in the upper housing body 1 and the lower housing body 2. A matching component is installed in the upper body installation area and the lower body installation area. The matching component includes two Hall element installation areas, an installation area of the PCB board, Hall element slots, installation posts, and buckles. On both sides of the upper housing body 1 and the lower housing body 2, there are respectively arranged a copper column and a screw installation area and a copper insert and a screw installation area for opening and closing the upper housing body 1 and the lower housing body 2. The above content is the same as the connection method and usage method of the housing, two magnetic cores 3, a PCB board, a shielding frame, a copper column, a screw installation area, a copper insert, a screw installation area, a rotating shaft structure, a copper insert, a stainless steel screw, an upper body installation area, a lower body installation area, two Hall element installation areas, an installation area of the PCB board, Hall element slots, installation posts, and buckles disclosed in the Chinese utility model patent with the application number 201920782845.9 to form a complete Hall current sensor. Some small components can refer to the internal components of the above-mentioned detachable open-loop Hall current sensor. Two bumps 4 are fixed in both the upper body installation area and the lower body installation area. Card slots 5 matching the bumps 4 are opened on both magnetic cores 3.

[0014] In this embodiment, through Figure 1 As shown in the figure, the two bumps 4 respectively located in the upper body installation area and the lower body installation area are symmetrically installed;

[0015] The magnetic core 3 is inserted onto the bump 4 through the card slot 5 for position limitation, preventing the magnetic core 3 from shifting when the temperature of the Hall current sensor is too high, and ensuring the measurement accuracy and stability of the Hall sensor.

[0016] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A split type Hall current sensor, comprising a housing and two magnetic cores installed in the housing, a PCB board and a shielding frame installed on the PCB board, wherein the housing is divided into an upper housing body and a lower housing body that can be opened and closed, wherein the upper housing body and the lower housing body are respectively provided with an upper body installation area and a lower body installation area, wherein the upper body installation area and the lower body installation area are provided with matching components, characterized in that: Two protrusions are fixed in the upper body installation area and the lower body installation area, and two magnetic cores are provided with slots matching with the protrusions.

2. A split type Hall current sensor according to claim 1, characterized in that: The two protrusions respectively located in the upper body installation area and the lower body installation area are installed symmetrically.

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