Welding-free three-in-one Hall current sensor

Abstract

The utility model relates to a welding-free three-in-one Hall current sensor, in particular to the technical field of current sensors. The sensor comprises a PCB, a Hall integrated chip, a magnetic core, a plastic housing and a fisheye terminal, a housing body of the plastic housing is provided with three paths of overcurrent windows, three paths of current can be detected at the same time without adding a branch product, and the fisheye terminal on the sensor is pressed into a client PCB hole in a crimping manner by adopting a PRESS-FIT technology, so that the detection precision is improved. Reliable connection of the electrical contacts is achieved, a welding process is not needed, the assembly efficiency is improved, and the circuit board and the sensor module are easy to disassemble and easy to maintain and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of current sensors, in particular to a welding-free installation three-in-one Hall current sensor. Background Art

[0002] At present, the traditional board-mounted current sensor is generally a single air gap single Hall structure, and the assembly adopts welding process; due to structural limitations, it can only detect one current, cannot realize multi-channel signal acquisition, and occupies a large space. When used in the client, the traditional board-mounted current sensor needs to use welding process to weld the power supply and signal pins of the current sensor on the PCB board to establish electrical contact. The process is complicated and difficult to assemble, and it is easy to cause poor contact of the sensor due to cold welding; at the same time, the PCB board and the current sensor module are not easy to disassemble, and the force on the PCB board will also increase. After a failure occurs, it is very inconvenient to maintain and replace, which increases the customer's assembly time and use cost. Utility Model Content

[0003] (1) Technical solution

[0004] In order to solve the above technical problems, the utility model provides a three-in-one Hall current sensor for welding-free installation, including a PCB board, a Hall integrated chip, a magnetic core, a plastic shell, and a fisheye terminal. The shell of the plastic shell is provided with three-way current windows, the Hall integrated chip includes a first Hall integrated chip, a second Hall integrated chip and a third Hall integrated chip, the magnetic core includes a first silicon steel core, a second silicon steel core and a third silicon steel core, the first silicon steel core, the second silicon steel core and the third silicon steel core are open ring cores and are arranged in an annular cavity corresponding to the plastic shell, the electronic components and the first Hall integrated chip, the second Hall integrated chip and the third Hall integrated chip are mounted on the PCB board and fixed to the plastic shell by fixing bolts, the first Hall integrated chip, the second Hall integrated chip and the third Hall integrated chip are respectively located in the air gaps of the first silicon steel core, the second silicon steel core and the third silicon steel core, and the mounting hole of the fisheye terminal is installed in the plastic shell.

[0005] Preferably, the plastic shell is a square structure.

[0006] Preferably, the fixing bolt includes a first fixing bolt and a second fixing bolt.

[0007] Preferably, a mounting hole for mounting the fisheye terminal is provided on the plastic housing.

[0008] Preferably, the plastic shell is filled with potting glue.

[0009] (2) Beneficial effects

[0010] The utility model provides a three-in-one Hall current sensor that can be installed without welding. Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. There are three current windows on the plastic shell, which can detect three currents at the same time without adding branch products.

[0012] 2. Using PRESS-FIT technology, the fisheye terminal on the sensor is pressed into the client PCB hole by crimping to achieve reliable connection of electrical contacts, without the need for welding process, thus improving assembly efficiency.

[0013] 3. The circuit board and sensor module are easy to disassemble, and maintenance and replacement are simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the exploded structure of the utility model.

[0015] The reference numerals are: 1-first fixing bolt, 2-second fixing bolt, 3-PCB board, 4-first Hall integrated chip, 5-potting glue, 6-first silicon steel magnetic core, 7-plastic shell, 8-second Hall integrated chip, 9-third Hall integrated chip, 10-second silicon steel magnetic core, 11-third silicon steel magnetic core, 12-fisheye terminal. DETAILED DESCRIPTION

[0016] The utility model is further described in conjunction with the accompanying drawings and embodiments.

[0017] like Figure 1As shown, the utility model discloses a three-in-one Hall current sensor for solder-free installation, comprising a PCB board 3, a Hall integrated chip, a magnetic core, a plastic shell 7, and a fisheye terminal 12. The shell of the plastic shell 7 is provided with three-way current windows, which can detect three-way currents simultaneously without adding branch products; the Hall integrated chip comprises a first Hall integrated chip 4, a second Hall integrated chip 8 and a third Hall integrated chip 9, the magnetic core comprises a first silicon steel magnetic core 6, a second silicon steel magnetic core 10 and a third silicon steel magnetic core 11, the first silicon steel magnetic core 6, the second silicon steel magnetic core 10 and the third silicon steel magnetic core 1 1 is an open annular magnetic core and is arranged in the annular cavity corresponding to the plastic shell 7. After the electronic components and the first Hall integrated chip 4, the second Hall integrated chip 8 and the third Hall integrated chip 9 are mounted on the PCB board 3 and are fixed to the plastic shell 7 by fixing bolts, the first Hall integrated chip 4, the second Hall integrated chip 8 and the third Hall integrated chip 9 are respectively located in the air gaps of the first silicon steel magnetic core 6, the second silicon steel magnetic core 10 and the third silicon steel magnetic core 11, and the plastic shell 7 has a mounting hole for installing the fisheye terminal 12.

[0018] The plastic housing 7 is a square structure, and the fixing bolts include a first fixing bolt 1 and a second fixing bolt 2 .

[0019] The plastic housing 7 is provided with a mounting hole for mounting the fisheye terminal 12 , and the plastic housing 7 is filled with potting glue.

[0020] Using PRESS-FIT technology, the fisheye terminal 12 on the sensor is pressed into the client PCB hole by crimping to achieve reliable connection of electrical contacts. No welding process is required, which further reduces production costs and assembly time, and is simple to maintain and easy to disassemble. The signal acquisition and amplification of the chip is programmed at two points through the programming system, and product programming of different current specifications can be realized according to customer customization requirements, solving the complicated procedures of repeated debugging based on traditional principles. Due to the use of Hall integrated chips with a wide sensitivity programming range, there is no need to change the core air gap size during the production process to meet the requirements of products with multiple current ranges, thereby improving product production efficiency and qualified rate. The client can collect signals from three channels at the same time and can detect changes in primary current in real time.

[0021] The above-mentioned embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but the utility model is not limited to these embodiments. It should be pointed out that for ordinary technicians in this field. Under the premise of not departing from the purpose of the utility model, any improvement made shall fall within the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A three-in-one Hall current sensor that can be installed without welding, characterized in that: The invention comprises a PCB board (3), a Hall integrated chip, a magnetic core, a plastic shell (7), and a fisheye terminal (12); the shell of the plastic shell (7) is provided with three-way current windows; the Hall integrated chip comprises a first Hall integrated chip (4), a second Hall integrated chip (8), and a third Hall integrated chip (9); the magnetic core comprises a first silicon steel magnetic core (6), a second silicon steel magnetic core (10), and a third silicon steel magnetic core (11); the first silicon steel magnetic core (6), the second silicon steel magnetic core (10), and the third silicon steel magnetic core (11) are open annular magnetic cores and are arranged in an annular cavity corresponding to the plastic shell (7). In the body, the PCB board (3) is mounted with electronic components and the first Hall integrated chip (4), the second Hall integrated chip (8) and the third Hall integrated chip (9) which are evenly spaced and fixed to the plastic shell (7) by fixing bolts, the first Hall integrated chip (4), the second Hall integrated chip (8) and the third Hall integrated chip (9) being respectively located in the air gaps of the first silicon steel magnetic core (6), the second silicon steel magnetic core (10) and the third silicon steel magnetic core (11), and the plastic shell (7) has a mounting hole for mounting the fisheye terminal (12).

2. A three-in-one Hall current sensor for welding-free installation according to claim 1, characterized in that: The plastic shell (7) is a square structure.

3. The three-in-one Hall current sensor for welding-free installation according to claim 1 is characterized in that: The fixing bolts comprise a first fixing bolt (1) and a second fixing bolt (2).

4. A three-in-one Hall current sensor for welding-free installation according to claim 1, characterized in that: The plastic shell (7) is provided with a mounting hole for mounting the fisheye terminal (12).

5. The three-in-one Hall current sensor for welding-free installation according to claim 1 is characterized in that: The plastic shell (7) is filled with potting glue.

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