Magnetic component testing device

Abstract

The utility model belongs to electric power detection technical field discloses magnetic part testing arrangement. Magnetic part testing arrangement includes dish body, dish cover, signal source output assembly and detection component, and the dish cover is covered in the dish body to enclose and form the closed cavity, and the closed cavity is used to accommodate mutual inductor, and the first vacuum cavity is established between the outer wall and the inner wall of dish body, and the second vacuum cavity is established between the outer wall and the inner wall of dish cover, and when the dish cover is covered in the dish body, the first vacuum cavity and the second vacuum cavity are enclosed in the outer periphery of closed cavity, signal source output assembly is connected with mutual inductor in the closed cavity, and signal source output assembly is used to input test signal to mutual inductor, and the detection end of detection component is located in the closed cavity, and detection component is used to gather the decibel value in the closed cavity. Through the first vacuum cavity and the second vacuum cavity are enclosed in the outer periphery of closed cavity, effectively isolate the outside environment interference, and the stability of test environment and the reliability of test result have been improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of power testing technology, and in particular to a testing device for magnetic components. Background Technology

[0002] With the rapid development of new energy technologies such as new energy vehicles and photovoltaic power generation, the proportion of DC leakage current protection in power applications is constantly increasing. One way to implement DC leakage current protection is through a leakage detection scheme based on the single-power fluxgate principle. In this DC leakage current detection scheme, the leakage signal is coupled into the excitation current through the current transformer, and the magnetic core generates a magnetic field bias, thereby detecting the leakage current. In this detection circuit, the current transformer has a relatively high excitation frequency, often above 2kHz. Under high-frequency excitation conditions, the operating state of the current transformer is easily affected by various factors such as its inductance matching degree, core permeability, and core volume structure, which can lead to electromagnetic howling problems and affect product quality to a certain extent. Therefore, electromagnetic howling tests must be performed on current transformers before they leave the factory. Existing devices for testing whether current transformers have howling are easily affected by external environmental interference, and the stability and reliability of the test results are poor.

[0003] Therefore, there is an urgent need for a testing device for magnetic components to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a magnetic parts testing device that effectively isolates external environmental interference and significantly improves the stability of the testing environment and the reliability of the test results.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Magnetic component testing device, including:

[0007] The dish body and the dish lid, wherein the dish lid is placed on the dish body to form a sealed cavity, the sealed cavity being used to accommodate the part to be tested;

[0008] A first vacuum cavity is provided between the outer wall and the inner wall of the dish body, and a second vacuum cavity is provided between the outer wall and the inner wall of the dish lid. The first vacuum cavity and the second vacuum cavity surround the outer periphery of the sealed cavity.

[0009] The signal source output component is communicatively connected to the part under test inside the sealed cavity, and the signal source output component is used to input test signals to the part under test.

[0010] A detection component, wherein the detection end of the detection component is located inside the sealed cavity, and the detection component is used to collect the decibel value inside the sealed cavity.

[0011] Optionally, the magnetic component testing device further includes a sealing gasket, which is disposed at the connection between the dish lid and the dish body.

[0012] Optionally, the detection component includes:

[0013] A sound sensor is disposed inside the sealed cavity, and the sound sensor is used to detect the decibel value of the part to be tested;

[0014] A decibel sensor is installed outside the sealed cavity, and the decibel sensor is communicatively connected to the sound sensor via a data acquisition line.

[0015] Optionally, the sealing gasket has a first through hole in its radial direction, the data acquisition line passes through the first through hole, and the space between the data acquisition line and the wall of the first through hole is filled with sealing material.

[0016] Optionally, the source output component includes:

[0017] A high-frequency LCR source is located outside the sealed cavity;

[0018] A test connection line is provided, with one end connected to the high-frequency LCR source and the other end connected to the part to be tested located in the sealed cavity. The high-frequency LCR source is used to output the test signal to the part to be tested.

[0019] Optionally, the sealing gasket is provided with a second through hole in the radial direction, the test connection wire passes through the second through hole, and the space between the test connection wire and the wall of the second through hole is filled with sealing material.

[0020] Optionally, the magnetic component testing device further includes a first vacuum pumping assembly, which comprises:

[0021] A first pressure detection element is connected to the first vacuum chamber, and the first pressure detection element is used to detect the pressure value of the first vacuum chamber.

[0022] A first control valve is located on the outer wall of the vessel lid, and the first control valve can be connected to an external vacuum pumping device.

[0023] Optionally, the magnetic component testing device further includes a second vacuum pumping assembly, which includes:

[0024] The second pressure detection element is connected to the second vacuum chamber and is used to detect the pressure value of the second vacuum chamber.

[0025] The second control valve is located on the outer wall of the lid and can be connected to an external vacuum pump.

[0026] Optionally, the bottom of the dish body is provided with an integrally formed support base, which is used to support the dish body.

[0027] Optionally, the lid and the body of the dish are separate structures;

[0028] Alternatively, the lid and the body of the dish are rotatably connected via a pivot, and the lid can be flipped relative to the body of the dish to open or close the sealed cavity.

[0029] Beneficial effects:

[0030] The magnetic component testing device provided by this utility model forms a sealed cavity for accommodating the component to be tested by enclosing the container lid and the container body. A first vacuum cavity is set between the outer and inner walls of the container body, and a second vacuum cavity is set between the outer and inner walls of the container lid. The first and second vacuum cavities surround the sealed cavity, effectively isolating external environmental interference and significantly improving the stability of the testing environment and the reliability of the test results. Simultaneously, a test signal is input to the component under test through a signal source output component, and the decibel value within the sealed cavity is collected by a detection component. This allows for accurate detection of whether the component under test exhibits electromagnetic howling under high-frequency excitation conditions, thereby effectively improving the product's factory quality. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the magnetic component testing device provided in this embodiment of the utility model;

[0032] Figure 2 This is a partial cross-sectional view of the magnetic component testing device provided in this embodiment of the utility model.

[0033] In the picture:

[0034] 10. Parts to be tested;

[0035] 110. Dish body; 111. First vacuum chamber; 112. Support base; 120. Dish lid; 121. Second vacuum chamber; 101. Sealed chamber;

[0036] 200. Source output component; 210. High-frequency LCR source; 220. Test connection cable;

[0037] 300. Detection component; 310. Sound sensor; 320. Decibels sensor; 330. Data acquisition cable;

[0038] 400. Sealing gasket;

[0039] 500. First vacuum assembly; 510. First pressure detection element; 520. First control valve;

[0040] 600, Second vacuum assembly; 610, Second pressure detection element; 620, Second control valve. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0045] This embodiment provides a testing device for magnetic components, wherein the magnetic component can be a current transformer, such as a type B current transformer. This embodiment uses a current transformer as an example to illustrate the testing device for magnetic core components.

[0046] like Figures 1-2As shown, the magnetic component testing device includes a dish body 110, a dish cover 120, a signal source output component 200, and a detection component 300. The dish cover 120 is placed on the dish body 110 to form a sealed cavity 101, which is used to accommodate a current transformer. A first vacuum cavity 111 is provided between the outer and inner walls of the dish body 110, and a second vacuum cavity 121 is provided between the outer and inner walls of the dish cover 120. When the dish cover 120 is placed on the dish body 110, the first vacuum cavity 111... The first and second vacuum chambers 121 surround the outer periphery of the sealed cavity 101; the signal source output component 200 is communicatively connected to the current transformer in the sealed cavity 101, and the signal source output component 200 is used to input test signals to the current transformer; the detection end of the detection component 300 is located in the sealed cavity 101, and the detection component 300 is used to collect the decibel value in the sealed cavity 101, which can accurately detect whether there is electromagnetic howling problem in the current transformer under high frequency excitation conditions, thereby effectively improving the factory quality of the current transformer.

[0047] The magnetic component testing device provided in this embodiment effectively isolates external environmental interference by having the first vacuum chamber 111 and the second vacuum chamber 121 surround the outer periphery of the sealed cavity 101, significantly improving the stability of the testing environment and the reliability of the test results.

[0048] Optional, such as Figure 1 As shown, the magnetic component testing device also includes a sealing gasket 400, which is disposed at the connection between the lid 120 and the body 110 of the container. This further enhances the sealing performance of the sealed cavity 101 and effectively prevents external environmental factors (such as air vibration, noise or dust) from penetrating into the sealed cavity 101, thereby further improving the isolation effect of the test environment and optimizing the stability and accuracy of the electromagnetic whistling test.

[0049] Optionally, such as Figure 2 As shown, the detection component 300 includes a sound sensor 310, a decibel sensor 320, and a data acquisition line 330. The sound sensor 310 is disposed inside the sealed cavity 101 and is used to detect the decibel value within the sealed cavity 101. The decibel sensor 320 is disposed outside the sealed cavity 101 and is communicatively connected to the sound sensor 310 via the data acquisition line 330. The sound sensor 310 directly captures the electromagnetic howling signal of the current transformer under high-frequency excitation conditions within the sealed cavity 101. The decibel sensor 320 receives and processes the signal through the data acquisition line 330, ensuring the accuracy and real-time performance of the test data.

[0050] Optionally, the sealing gasket 400 has a first through hole in the radial direction, and the data acquisition line 330 passes through the first through hole. The space between the data acquisition line 330 and the wall of the first through hole is filled with sealing material, which effectively prevents external environmental factors (such as noise, vibration or air) from seeping into the sealed cavity 101 through the first through hole of the data acquisition line 330. This significantly improves the stability of the electromagnetic whistling test and the reliability of the test data, and improves the factory quality of the current transformer.

[0051] Optionally, the signal source output component 200 includes a high-frequency LCR source 210 and a test connection line 220. The high-frequency LCR source 210 is located outside the sealed cavity 101. One end of the test connection line 220 is connected to the high-frequency LCR source 210, and the other end is connected to the current transformer located inside the sealed cavity 101. The high-frequency LCR source 210 is used to output test signals to the current transformer. The external high-frequency LCR source 210 provides a stable high-frequency excitation signal, ensuring that the test conditions are highly consistent with the actual application scenario. Simultaneously, the configuration of the test connection line 220 effectively ensures the reliability of signal transmission. During actual testing, the high-frequency LCR source 210 can output high-frequency excitation signals and AC voltage signals, and can also test the inductance of the current transformer.

[0052] Optionally, the sealing gasket 400 is provided with a second through hole in the radial direction, and the test connection wire 220 passes through the second through hole. The space between the test connection wire 220 and the wall of the second through hole is filled with sealing material, which effectively prevents external environmental factors (such as noise, vibration or air) from seeping into the sealed cavity 101 through the second through hole of the test connection wire 220. This significantly improves the stability of the electromagnetic whistling test and the reliability of the test data, and improves the factory quality of the current transformer.

[0053] Optionally, such as Figure 1 As shown, the magnetic component testing device also includes a first vacuum assembly 500, which includes a first pressure detection element 510 and a first control valve 520. The first pressure detection element 510 is connected to the first vacuum chamber 111 and is used to detect the pressure value of the first vacuum chamber 111. The first control valve 520 is disposed on the outer wall of the lid 120 and can be connected to an external vacuum device. The first pressure detection element 510 can monitor the pressure value of the first vacuum chamber 111 in real time to ensure the stability of the vacuum environment; the first control valve 520 is connected to an external vacuum device to facilitate precise control of the vacuum level of the first vacuum chamber 111 and enhance the isolation effect on the sealed chamber 101.

[0054] Optionally, such as Figure 2As shown, the magnetic component testing device also includes a second vacuum assembly 600. The second vacuum assembly 600 includes a second pressure detection element 610 and a second control valve 620. The second pressure detection element 610 is connected to the second vacuum chamber 121 and is used to detect the pressure value of the second vacuum chamber 121. The second control valve 620 is located on the outer wall of the lid 120 and can be connected to external vacuum equipment. The second pressure detection element 610 can monitor the pressure value of the second vacuum chamber 121 in real time, ensuring a stable vacuum environment in the lid 120 area and effectively isolating external environmental interference. The second control valve 620, connected to external vacuum equipment, facilitates precise control of the vacuum level in the second vacuum chamber 121, further optimizing the isolation effect on the sealed chamber 101.

[0055] Optionally, the first vacuum assembly 500 and the second vacuum assembly 600 can work together to ensure that the vacuum levels of the first vacuum chamber 111 and the second vacuum chamber 121 are consistent before each test, and that the external conditions of the sealed chamber 101 are consistent before each test, thereby further improving the stability and accuracy of the electromagnetic whistling test.

[0056] In this embodiment, the vacuum pump can be a vacuum pump. The vacuum pump is connected to the first control valve 520 through a first vacuum tube and to the second control valve 620 through a second vacuum tube, thereby realizing the regulation of the vacuum level in the first vacuum chamber 111 and the second vacuum chamber 121. The first control valve 520 can be a manual valve or a solenoid valve, and the second control valve 620 can be a manual valve or a solenoid valve.

[0057] Optionally, the bottom of the dish body 110 is provided with an integrally formed support base 112. The support base 112 is used to support the dish body 110, which improves the structural strength of the dish body 110 and can also effectively support the dish body 110, thereby improving the stability of the dish body 110.

[0058] Optionally, the lid 120 and the body 110 are separate structures. When placing the current transformer to be tested, the lid 120 can be removed from the body 110, which facilitates the placement and removal of the current transformer to be tested. In other embodiments, the lid 120 and the body 110 are rotatably connected by a pivot. The lid 120 can be flipped relative to the body 110 to open or close the sealed cavity 101, which improves the flexibility of opening and closing the lid 120.

[0059] Optionally, the position of the lid 120 relative to the rotating shaft can be fixed to the body 110 of the dish by a latch, which can provide axial pressure to the lid 120, improve the sealing performance at the connection between the lid 120 and the body 110, and help improve the reliability of the magnetic component testing device. The latch may include a hook and a latch body, one of which is disposed on the lid 120, and the other of which is disposed on the body 110. The latch body can lock onto the hook to ensure the stability and tightness of the lid 120 when closed.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A magnetic part testing device, characterized by, include: The dish body (110) and the dish lid (120) are provided on the dish body (110) to form a sealed cavity (101), which is used to accommodate the part (10) to be tested. A first vacuum chamber (111) is provided between the outer wall and the inner wall of the dish body (110), and a second vacuum chamber (121) is provided between the outer wall and the inner wall of the dish lid (120). The first vacuum chamber (111) and the second vacuum chamber (121) surround the outer periphery of the sealed cavity (101). The signal source output component (200) is communicatively connected to the part to be tested (10) inside the sealed cavity (101), and the signal source output component (200) is used to input a test signal to the part to be tested (10); A detection component (300) is provided, wherein the detection end of the detection component (300) is located inside the sealed cavity (101), and the detection component (300) is used to collect the decibel value inside the sealed cavity (101).

2. The magnetic part testing device of claim 1, wherein, The magnetic component testing device also includes a sealing gasket (400), which is disposed at the connection between the lid (120) and the body (110).

3. The magnetic part testing device of claim 2, wherein, The detection component (300) includes: A sound sensor (310) is disposed in the sealed cavity (101), and the sound sensor (310) is used to detect the decibel value of the part to be tested (10); A decibel sensor (320) is disposed outside the sealed cavity (101), and the decibel sensor (320) is communicatively connected to the sound sensor (310) via a data acquisition line (330).

4. The magnetic part testing device of claim 3, wherein, The sealing gasket (400) has a first through hole in its radial direction, the data acquisition line (330) passes through the first through hole, and the space between the data acquisition line (330) and the wall of the first through hole is filled with sealing material.

5. The magnetic part testing device of claim 2, wherein, The source output component (200) includes: A high-frequency LCR source (210) is disposed outside the sealed cavity (101); Test connection line (220), one end of which is connected to the high-frequency LCR source (210), and the other end is connected to the part to be tested (10) located in the sealed cavity (101). The high-frequency LCR source (210) is used to output the test signal to the part to be tested (10).

6. The magnetic part testing device of claim 5, wherein, The sealing gasket (400) is provided with a second through hole in the radial direction, the test connection wire (220) passes through the second through hole, and the space between the test connection wire (220) and the wall of the second through hole is filled with sealing material.

7. The magnetic part testing device of claim 1, wherein, The magnetic component testing device further includes a first vacuum pumping assembly (500), which comprises: The first pressure detection element (510) is connected to the first vacuum chamber (111) and is used to detect the pressure value of the first vacuum chamber (111). A first control valve (520) is disposed on the outer wall of the lid (120), and the first control valve (520) can be connected to an external vacuuming device.

8. The magnetic component testing device according to claim 1, characterized in that, The magnetic component testing device further includes a second vacuum pumping assembly (600), which comprises: The second pressure detection element (610) is connected to the second vacuum chamber (121) and is used to detect the pressure value of the second vacuum chamber (121). The second control valve (620) is disposed on the outer wall of the lid (120) and can be connected to an external vacuuming device.

9. The magnetic component testing apparatus according to any one of claims 1-8, characterized in that, The bottom of the dish body (110) is provided with an integrally formed support base (112), which is used to support the dish body (110).

10. The magnetic component testing apparatus according to any one of claims 1-8, characterized in that, The lid (120) and the body (110) of the dish are separate structures; Alternatively, the lid (120) and the body of the dish (110) are rotatably connected by a pivot, and the lid (120) can be flipped relative to the body of the dish (110) to open or close the sealed cavity (101).

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