Current sensor acceleration test working condition simulation device

Abstract

The utility model belongs to the technical field of current sensor tests, and particularly relates to a current sensor acceleration test working condition simulation device, which comprises a support, a screw and a permanent magnet, the support and the screw are made of non-magnetic materials, the support is arranged on one side of a current sensor test installation position, and the permanent magnet is arranged on the screw. The screw penetrates through the support and is in threaded fit with the support, one end of the screw faces a current sensor test mounting position, and the permanent magnet is arranged at one end, facing the current sensor test mounting position, of the screw. The arrangement of an accompanying test power supply and corresponding through-flow cables and busbars can be omitted, the test cost is reduced, the limitation degree of the number of models of the current sensors which can be tested at the same time is reduced, the number of models of the current sensors which can be tested at the same time can be larger, and the test efficiency is improved. Different input current working conditions can be simulated, simulation of tested working currents with different amplitudes is realized, tests of current sensors with different measuring ranges and models are met, and the universality is higher.

Description

Technical Field

[0001] This utility model belongs to the field of current sensor testing technology, specifically relating to a current sensor accelerated test condition simulation device. Background Technology

[0002] During accelerated testing of magnetically sensitive current sensors, environmental stresses such as high temperature, low temperature, and high humidity are applied in an environmental chamber to accelerate sensor aging. To simulate field conditions, the operating voltage of the current sensor under test is supplied by a power supply, while the measured current is supplied by a test power supply. Accelerated testing is often a long-term process, requiring the test power supply to be occupied and operational for extended periods. Factors such as the power supply itself, test power consumption, and the design of current-carrying cables or busbars contribute to high testing costs. Especially when multiple current sensor models are subjected to accelerated testing simultaneously, the need to set up a test power supply for each current sensor individually necessitates the long-term occupation of multiple test power supplies. Furthermore, limitations imposed by current-carrying cables or busbars restrict the number of current sensor models that can be tested simultaneously. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a current sensor accelerated test condition simulation device that reduces test costs, allows for a greater number of current sensor models to be tested, improves test efficiency, and has higher versatility.

[0004] The present invention includes a support, a screw, and a permanent magnet. Both the support and the screw are made of non-magnetic material. The support is disposed on one side of the current sensor test installation position. The screw passes through the support and is threaded into the support, with one end of the screw facing the current sensor test installation position. The permanent magnet is disposed at the end of the screw facing the current sensor test installation position.

[0005] Furthermore, it also includes a support plate located at one end of the screw facing the test installation position of the current sensor, with the middle part of the support plate fixedly connected to that end of the screw, and the permanent magnet disposed on the support plate.

[0006] Furthermore, the support plate is made of a magnetically conductive material, and the permanent magnet is magnetically attached to the support plate.

[0007] Furthermore, the support plate is made of magnetically conductive stainless steel.

[0008] Furthermore, it also includes a locking nut, which is mounted on the screw.

[0009] Furthermore, the locking nut is made of non-magnetic stainless steel.

[0010] Furthermore, the support includes a support body and a nut. The support body has a through hole, and a nut is provided on the support body at the location of the through hole. The screw and the nut are threaded together.

[0011] Furthermore, the support includes a base and a bracket, the bracket being disposed on the base and the screw being disposed on the bracket.

[0012] Furthermore, the base is made of a non-conductive and non-magnetic material, and the bracket and nut are made of non-magnetic stainless steel.

[0013] Furthermore, both the base and the bracket are plate-shaped components, with the bracket vertically mounted on the base.

[0014] The beneficial effects of this invention are as follows: by using a permanent magnet to generate a magnetic field instead of the measured current, the actual working conditions of the current sensor are simulated. This eliminates the need for a test power supply and the corresponding current-carrying cables and busbars, reducing testing costs. When testing a large number of current sensors, it avoids the limitations imposed by current-carrying cables and busbars, thus reducing the limitation on the number of current sensor models that can be tested simultaneously. This allows for testing a wider range of current sensor models simultaneously, improving testing efficiency. The overall structure is simple. By rotating the screw, the distance between the permanent magnet and the current sensor can be adjusted, eliminating the problem of differences in magnetic field strength between different permanent magnets. It can also simulate different input current conditions, achieving simulation of measured working currents of different amplitudes, meeting the testing needs of current sensors with different ranges, thus increasing versatility. The support and screw are made of non-magnetic materials, reducing the impact on the magnetic field generated by the permanent magnet and ensuring the accuracy of the test. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the current sensor accelerated test condition simulation device of this utility model, which is set on one side of the current sensor.

[0016] In the diagram: 1. Base; 2. Bracket; 3. Screw; 4. Locking nut; 5. Bearing plate; 6. Permanent magnet; 7. Current sensor. Detailed Implementation

[0017] like Figure 1As shown, this utility model provides a current sensor accelerated test condition simulation device, including a support, a screw 3, and a permanent magnet 6. Both the support and the screw 3 are made of non-magnetic material. The support is positioned on one side of the current sensor 7 test installation location, which is the location in the test equipment or system used to install the current sensor 7. The screw 3 passes through the support and is threaded into it, with one end of the screw 3 facing the current sensor 7 test installation location. The permanent magnet 6 is located at the end of the screw 3 facing the current sensor 7 test installation location.

[0018] like Figure 1 As shown, this utility model is installed on the PCB or platform where the tested current sensor 7 is located, with the entire unit positioned to one side of the current sensor 7. Each single operating condition simulation device is arranged one-to-one with a single current sensor 7, meaning each device simulates the operating conditions of a single current sensor 7. This utility model uses a permanent magnet 6 to generate a magnetic field instead of the measured current, simulating the actual operating conditions of the current sensor 7. This eliminates the need for a test power supply and corresponding current-carrying cables and busbars, reducing testing costs. When testing a large number of current sensors 7, it avoids the limitations imposed by current-carrying cables and busbars, thus reducing the limitation on the number of current sensor 7 models that can be tested simultaneously. This allows for testing a greater number of current sensor 7 models simultaneously, improving testing efficiency. The overall structure is simple. By rotating the screw 3, the distance between the permanent magnet 6 and the current sensor 7 can be adjusted, eliminating the problem of differences in magnetic field strength between different permanent magnets 6. It can also simulate different input current conditions, achieving simulation of different amplitude measured operating currents, meeting the testing needs of different range models of current sensors 7, thus increasing its versatility. The support and screw 3 are made of non-magnetic material, which reduces the influence on the magnetic field generated by the permanent magnet 6 and ensures the accuracy of the test.

[0019] In this invention, the permanent magnet 6 is used to generate a magnetic field. Its strength must remain stable and prevent demagnetization under high temperature, low temperature, and high humidity testing environments. The specific temperature and humidity tolerance is determined by the required materials for the test conditions. For example, a ferrite permanent magnet can be selected for a standard 85°C and 85%RH test, as it can withstand temperatures up to 200°C and is resistant to moisture and corrosion. Furthermore, the size of the permanent magnet 6 is selected to match the different measured currents and the varying magnetic field strengths of the permanent magnet 6.

[0020] In one embodiment of this utility model, the permanent magnet 6 is directly fixed to one end of the screw 3 facing the test installation position of the current sensor 7.

[0021] In another embodiment of this utility model, a support plate 5 is also included. The support plate 5 is located at one end of the screw 3 facing the test installation position of the current sensor 7. The middle part of the support plate 5 is fixedly connected to the end of the screw 3. The connection method can be welding or other fixing methods. The permanent magnet 6 is set on the support plate 5. Based on the setting of the support plate 5, the installation of the permanent magnet 6 can be more convenient.

[0022] Preferably, the support plate 5 is made of a magnetically conductive material, and the permanent magnet 6 is magnetically attached to the support plate 5. This arrangement makes the assembly and disassembly of the permanent magnet 6 more convenient and quick, and can accommodate the rapid setup of permanent magnets 6 of different sizes, reducing structural complexity. More preferably, the support plate 5 is made of magnetically conductive stainless steel, meeting the requirements of being rust-free and deformation-free under experimental conditions.

[0023] This utility model also includes a locking nut 4, which is disposed on the screw 3. Rotating the screw 3 controls the adjustment of the distance between the permanent magnet 6 and the current sensor 7. After reaching a suitable distance, the screw 3 is kept stationary, and the locking nut 4 is rotated to lock it, effectively fixing the position of the screw 3 and improving the reliability of use.

[0024] The locking nut 4 is made of non-magnetic stainless steel, which not only avoids affecting the magnetic field generated by the permanent magnet 6, but also can withstand high and low temperatures and high humidity.

[0025] The support includes a support body and a nut. The support body has a through hole, and a nut is positioned at the location of the through hole. A screw 3 is threadedly engaged with the nut; that is, the screw 3 achieves threaded engagement with the support by engaging with the threaded nut on the support body. This configuration only requires fixing the nut to the support body to meet the corresponding threaded engagement requirements, reducing the machining difficulty of the support.

[0026] The support includes a base 1 and a bracket 2. The base 1 is used to support the entire working condition simulation device. The bracket 2 is mounted on the base 1, and the screw 3 is mounted on the bracket 2.

[0027] Both the base 1 and the bracket 2 are plate-shaped components, with the bracket 2 vertically mounted on the base 1. The base 1 is made of a non-conductive and non-magnetic material to avoid affecting the magnetic field generated by the permanent magnet 6 and to provide insulation. It also needs to exhibit low deformation and non-corrosion performance in high and low temperature and high humidity environments; epoxy board can be selected as a suitable material. The bracket 2 and the nut are made of non-magnetic stainless steel.

[0028] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0029] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A current sensor accelerated test condition simulation device, characterized in that, The device includes a support, a screw (3), and a permanent magnet (6). Both the support and the screw (3) are made of non-magnetic material. The support is located on one side of the test installation position of the current sensor (7). The screw (3) passes through the support and is threaded into the support. One end of the screw (3) is positioned towards the test installation position of the current sensor (7). The permanent magnet (6) is located at the end of the screw (3) that faces the test installation position of the current sensor (7).

2. The current sensor accelerated test condition simulation device as described in claim 1, characterized in that, It also includes a support plate (5), which is located at one end of the screw (3) toward the test installation position of the current sensor (7). The middle part of the support plate (5) is fixedly connected to that end of the screw (3), and the permanent magnet (6) is disposed on the support plate (5).

3. The current sensor accelerated test condition simulation device as described in claim 2, characterized in that, The support plate (5) is made of magnetic material, and the permanent magnet (6) is magnetically attached to the support plate (5).

4. The current sensor accelerated test condition simulation device as described in claim 3, characterized in that, The bearing plate (5) is made of magnetically conductive stainless steel.

5. The current sensor accelerated test condition simulation device as described in any one of claims 1-4, characterized in that, It also includes a locking nut (4), which is disposed on the screw (3).

6. The current sensor accelerated test condition simulation device as described in claim 5, characterized in that, The locking nut (4) is made of non-magnetic stainless steel.

7. The current sensor accelerated test condition simulation device as described in any one of claims 1-4 and 6, characterized in that, The support includes a support body and a nut. The support body has a through hole and a nut is provided at the location of the through hole. The screw (3) is threadedly engaged with the nut.

8. The current sensor accelerated test condition simulation device as described in claim 7, characterized in that, The support includes a base (1) and a bracket (2), the bracket (2) is mounted on the base (1), and the screw (3) is mounted on the bracket (2).

9. The current sensor accelerated test condition simulation device as described in claim 8, characterized in that, The base (1) is made of non-conductive and non-magnetic material, and the bracket (2) and nut are made of non-magnetic stainless steel.

10. The current sensor accelerated test condition simulation device as described in claim 8 or 9, characterized in that, Both the base (1) and the bracket (2) are plate-shaped pieces, and the bracket (2) is vertically arranged on the base (1).

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