Inductor test tool

Abstract

The utility model discloses a testing tool for an inductor. The testing tool comprises a detection platform, a supporting seat, a conductive supporting column, a magnetic core detection column, a coil detection column and a cylinder detection column. In the test tool, the magnetic core detection column is electrically connected to the magnetic core current-conducting plate, the coil detection column is electrically connected to the coil current-conducting plate, and the cylinder detection column is electrically connected to the conductive supporting column, so that when an inductor to be detected is installed on the test tool, a probe only needs to press the magnetic core detection column, the coil detection column and the cylinder detection column; therefore, corresponding detection data can be conveniently, quickly and stably obtained, the stability of the detection data is improved on the premise that the electrical performance of the inductor is automatically detected, and the detection precision and reliability of the inductor are improved.

Description

Technical Field

[0001] This utility model relates to the field of inductor performance testing equipment, and in particular to a testing fixture for inductors. Background Technology

[0002] An inductor is a component that converts electrical energy into magnetic energy and stores it. It generally consists of a magnetic core and a coil wound around the surface of the magnetic core. Inductors are used to impede changes in current. If there is no current flowing through the inductor, it will attempt to impede the current flow when the circuit is closed. If there is current flowing through the inductor, it will attempt to maintain a constant current when the circuit is open. It is also called a reactor.

[0003] After production, inductors need to undergo performance tests such as resistance and high voltage withstand. Typically, this requires connecting the probes of the testing instrument to the inductor. Due to the unique winding structure of the inductor, it is difficult to stably fix it on the testing platform. Therefore, existing technologies generally require testing fixtures to fix the inductor under test.

[0004] However, existing inductor testing fixtures generally only serve a fixed installation function. During testing, it is still necessary to connect the probes of the testing instrument to the corresponding structures of the inductor, such as the magnetic core, coil, or cylinder, to perform various electrical performance tests. However, it is not easy for the probes of the testing instrument to connect stably to the above-mentioned testing points, which leads to the instability of test data acquisition and reduces the accuracy and reliability of the test. Utility Model Content

[0005] The purpose of this invention is to provide a testing fixture for inductors that, while ensuring stable installation of the inductor, enables stable acquisition of test data, thereby improving the detection accuracy and reliability of the inductor and overcoming the shortcomings of the prior art.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A testing fixture for an inductor includes a testing platform, a support base, a conductive support column, a magnetic core testing column, a coil testing column, and a cylindrical column testing column;

[0008] The support base is protrudingly installed in the middle of the detection platform, and a coil conductive plate for contacting the coil of the inductor is protruding in the middle of the support base, and magnetic core conductive plates for contacting the magnetic core of the inductor are protruding at both ends of the support base.

[0009] The conductive support column is provided with four columns, which are protrudingly installed on the detection platform and evenly arranged around the support base. The top ends of the four conductive support columns are respectively used to abut against the four cylindrical columns of the inductor.

[0010] The magnetic core detection column, the coil detection column, and the cylindrical column detection column are all protrudingly mounted on the rear side of the testing platform, and are all used to abut against the probes of the testing instrument; the magnetic core detection column is electrically connected to the magnetic core conductive plate, the coil detection column is electrically connected to the coil conductive plate, and the cylindrical column detection column is electrically connected to the conductive support column.

[0011] Preferably, it also includes an NTC signal receiving socket and an NTC detection post;

[0012] The NTC signal receiving socket is protrudingly mounted on the detection platform, and the NTC signal receiving socket is used to connect to the NTC temperature signal transmission line of the inductor;

[0013] The NTC detection post is protrudingly mounted on the rear side of the testing platform, and the NTC detection post is used to abut against the probe of the testing instrument; the NTC detection post is electrically connected to the NTC signal receiving socket.

[0014] Preferably, the NTC detection post includes a first post and a second post, the first post being electrically connected to an external terminal one of the NTC signal receiving socket, and the second post being electrically connected to an external terminal two of the NTC signal receiving socket.

[0015] Preferably, the conductive support column includes a support portion and an elastic telescopic portion integrally formed from top to bottom. The top end of the support portion is used to abut against the cylindrical part of the inductor, and the end of the elastic telescopic portion is installed on the detection platform.

[0016] Preferably, the testing fixture further includes a mounting plate, and the testing platform is mounted on the upper surface of the mounting plate.

[0017] Preferably, the mounting plate has a second mounting through hole on its surface.

[0018] Preferably, the mounting plate has locking countersunk holes on its surface.

[0019] Preferably, the magnetic core detection post is electrically connected to the magnetic core conductive plate via a wire, and the coil detection post is electrically connected to the coil conductive plate via a wire;

[0020] The cylindrical detection column is electrically connected to the conductive support column via a conductive sheet, and the conductive sheet is embedded in the upper surface of the detection platform.

[0021] Preferably, the NTC detection post is electrically connected to the NTC signal receiving socket via a wire.

[0022] The technical solution provided by this utility model can include the following beneficial effects:

[0023] In this test fixture, the magnetic core detection post is electrically connected to the magnetic core conductive plate, the coil detection post is electrically connected to the coil conductive plate, and the cylindrical column detection post is electrically connected to the conductive support post. When the inductor to be tested is installed in the test fixture, the probe only needs to press the magnetic core detection post, the coil detection post, and the cylindrical column detection post to conveniently, quickly, and stably obtain the corresponding test data. Under the premise of realizing automatic detection of the electrical performance of the inductor, the stability of the test data is improved, thereby improving the detection accuracy and reliability of the inductor. Attached Figure Description

[0024] Figure 1 This is a top view of a test fixture for an inductor according to this utility model.

[0025] Figure 2 This is a side view of a test fixture for an inductor according to the present invention.

[0026] Among them: detection platform 31, conductive sheet 311, support base 32, coil conductive plate 321, magnetic core conductive plate 322, conductive support column 33, support part 331, elastic telescopic part 332, magnetic core detection column 34, coil detection column 35, cylindrical column detection column 36, NTC signal receiving socket 37, NTC detection column 38, mounting plate 39, second mounting through hole 391, locking countersunk hole 392. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] This technical solution provides a test fixture for an inductor, including a test platform 31, a support base 32, a conductive support column 33, a magnetic core test column 34, a coil test column 35, and a cylindrical test column 36.

[0029] The support base 32 is protrudingly installed in the middle of the detection platform 31, and the middle of the support base 32 is provided with a coil conductive plate 321 for contacting the coil of the inductor, and the two ends of the support base 32 are provided with magnetic core conductive plates 322 for contacting the magnetic core of the inductor.

[0030] Four conductive support columns 33 are provided. The four conductive support columns 33 are protrudingly installed on the detection platform 31 and are evenly arranged around the support base 32. The top ends of the four conductive support columns 33 are respectively used to abut against the four cylindrical columns of the inductor.

[0031] The magnetic core detection post 34, the coil detection post 35, and the cylindrical column detection post 36 are all protrudingly mounted on the rear side of the detection platform 31, and are all used to abut against the probes of the testing instrument; the magnetic core detection post 34 is electrically connected to the magnetic core conductive plate 322, the coil detection post 35 is electrically connected to the coil conductive plate 321, and the cylindrical column detection post 36 is electrically connected to the conductive support post 33.

[0032] To improve the testing stability of inductors, this technical solution proposes a testing fixture for inductors, such as... Figure 1-2 As shown, the testing process is as follows: First, the inductor to be tested (not shown in the figure) is placed in the test fixture manually; then, the probe of the test instrument (not shown in the figure) is pressed against any two or more of the magnetic core detection post 34, coil detection post 35 and cylinder detection post 36 in the test fixture as detection points, so that the relevant electrical performance between the corresponding detection points can be realized.

[0033] In this test fixture, the core detection post 34 is electrically connected to the core conductive plate 322, the coil detection post 35 is electrically connected to the coil conductive plate 321, and the cylindrical column detection post 36 is electrically connected to the conductive support post 33. When the inductor to be tested is installed in the test fixture, the inductor's coil contacts the coil conductive plate 321, thus establishing conductivity between the coil and the coil detection post 35; the inductor's core contacts the core conductive plate 322, thus establishing conductivity between the core and the core detection post 34; and the inductor's cylindrical column contacts the conductive support post 33, thus establishing conductivity between the cylindrical column and the cylindrical column detection post 36. The probe only needs to press the core detection post 34, the coil detection post 35, and the cylindrical column detection post 36 to conveniently, quickly, and stably acquire the corresponding test data, improving the stability of the test data and thus enhancing the inductor's detection accuracy and reliability.

[0034] It should be noted that, to facilitate the mounting of inductors on power supply equipment, cylindrical posts (usually made of metal) with central openings are typically installed around the inductor. The through holes in the central part of these posts are used to pass through screws or bolts for mounting and securing the inductor. For ease of protection and installation, the cylindrical posts are generally connected to the inductor's core and coil via injection molding to ensure good electrical insulation. For a specific structural reference, see Chinese invention patent CN115769321A, "An Inductor with Temperature Detection."

[0035] To further explain, it also includes the NTC signal receiving socket 37 and the NTC detection post 38;

[0036] The NTC signal receiving socket 37 is protrudingly mounted on the detection platform 31, and the NTC signal receiving socket 37 is used to connect to the NTC temperature signal transmission line of the inductor.

[0037] The NTC detection post 38 is protrudingly mounted on the rear side of the detection platform 31, and the NTC detection post 38 is used to abut against the probe of the testing instrument; the NTC detection post 38 is electrically connected to the NTC signal receiving socket 37.

[0038] Similarly, referring to the Chinese invention patent "An Inductor with Temperature Detection" with publication number CN115769321A, when a high-power inductor is working, the heating of the inductor coil and the internal magnetic core will cause the overall temperature of the inductor to rise. In order to accurately detect and control the working temperature of the inductor, it is also necessary to install temperature sensing devices such as thermistors on the surface of the inductor coil to realize the temperature detection of the inductor coil.

[0039] Therefore, in order to detect the operating temperature of the inductor, this solution also adds an NTC signal receiving socket 37 to the test fixture. By plugging the NTC temperature signal transmission line of the inductor into the NTC signal receiving socket 37, the probe can press the NTC detection post 38, thereby conveniently obtaining the temperature detection data of the inductor.

[0040] To further explain, the NTC detection post 38 includes a first post and a second post. The first post is electrically connected to an external terminal one of the NTC signal receiving socket 37, and the second post is electrically connected to an external terminal two of the NTC signal receiving socket 37.

[0041] To further explain, the conductive support column 33 includes a support portion 331 and an elastic telescopic portion 332 integrally formed from top to bottom. The top end of the support portion 331 is used to abut against the cylindrical part of the inductor, and the end of the elastic telescopic portion 332 is installed on the detection platform 31.

[0042] Furthermore, to avoid hard contact between the test fixture and the inductor under test, which could damage the inductor, and to ensure conductivity between the various test posts of the test fixture and the corresponding structures of the inductor, this solution also optimizes the structure of the conductive support post 33, such as... Figure 2 As shown, its lower column is configured as an elastic telescopic part 332, such as a spring.

[0043] Furthermore, the test fixture also includes a mounting plate 39, and the testing platform 31 is mounted on the upper surface of the mounting plate 39.

[0044] In addition, to facilitate the quick installation and positioning of the testing fixture in the existing testing workbench, this solution also adds a mounting plate 39 to the testing fixture. The mounting plate 39 enables its detachable installation on the existing testing workbench, thereby facilitating stable testing in different testing environments and improving the versatility of the testing fixture.

[0045] To further explain, the mounting plate 39 has a second mounting through hole 391 on its surface.

[0046] In one embodiment, this solution utilizes the assembly between the mounting pin (not shown in the figure) and the first mounting through hole and the second mounting through hole 390 in the existing testing workbench to achieve detachable installation of the test fixture in the existing testing workbench. The structure is simple, convenient and quick.

[0047] Specifically, the existing testing workbench has a first mounting through hole (not shown in the figure), and the first mounting through hole and the second mounting through hole 390 match each other. After the mounting pin passes through the second mounting through hole 391 and the first mounting through hole in sequence, the mounting plate 39 is installed on the existing testing workbench.

[0048] To further explain, the mounting plate 39 has locking countersunk holes 392 on its surface.

[0049] In another embodiment, this solution utilizes the assembly between the existing locking block and the locking countersunk hole 392 to achieve detachable installation of the test fixture in the existing testing workbench, which is simple in structure and convenient and quick.

[0050] Specifically, the existing testing workbench is equipped with a locking block (not shown in the figure), and the locking block is detachably installed on the existing testing workbench. The shape of the locking block matches the shape of the locking countersunk hole 392. The locking block is used to press the mounting plate 39 onto the existing testing workbench.

[0051] To further explain, the magnetic core detection post 34 is electrically connected to the magnetic core conductive plate 322 via a wire, and the coil detection post 35 is electrically connected to the coil conductive plate 321 via a wire;

[0052] The cylindrical detection column 36 is electrically connected to the conductive support column 33 via a conductive sheet 311, and the conductive sheet 311 is embedded in the upper surface of the detection platform 31.

[0053] To further explain, the NTC detection post 38 is electrically connected to the NTC signal receiving socket 37 via a wire.

[0054] In one specific embodiment of this technical solution, the magnetic core detection post 34, the coil detection post 35, and the NTC detection post 38 can be electrically connected to their respective structures via wires, which is simple and convenient.

[0055] The cylindrical detection column 36 is electrically connected to the four conductive support columns 33 simultaneously through a conductive sheet 311 (such as a copper sheet) embedded on the upper surface of the detection platform 31. This can reduce the excessive number of wires on the test fixture, which would affect the installation stability of the inductor.

[0056] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0057] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0058] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0059] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0060] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0061] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0062] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A testing fixture for an inductor, characterized in that: This includes a testing platform, support base, conductive support column, magnetic core testing column, coil testing column, and cylindrical column testing column; The support base is protrudingly installed in the middle of the detection platform, and a coil conductive plate for contacting the coil of the inductor is protruding in the middle of the support base, and magnetic core conductive plates for contacting the magnetic core of the inductor are protruding at both ends of the support base. The conductive support column is provided with four columns, which are protrudingly installed on the detection platform and evenly arranged around the support base. The top ends of the four conductive support columns are respectively used to abut against the four cylindrical columns of the inductor. The magnetic core detection column, the coil detection column, and the cylindrical column detection column are all protrudingly mounted on the rear side of the testing platform, and are all used to abut against the probes of the testing instrument; the magnetic core detection column is electrically connected to the magnetic core conductive plate, the coil detection column is electrically connected to the coil conductive plate, and the cylindrical column detection column is electrically connected to the conductive support column.

2. The inductor testing fixture according to claim 1, characterized in that: It also includes an NTC signal receiving socket and an NTC detection post; The NTC signal receiving socket is protrudingly mounted on the detection platform, and the NTC signal receiving socket is used to connect to the NTC temperature signal transmission line of the inductor; The NTC detection post is protrudingly mounted on the rear side of the testing platform, and the NTC detection post is used to abut against the probe of the testing instrument; the NTC detection post is electrically connected to the NTC signal receiving socket.

3. The inductor testing fixture according to claim 2, characterized in that: The NTC detection post includes a first post and a second post. The first post is electrically connected to an external terminal one of the NTC signal receiving socket, and the second post is electrically connected to an external terminal two of the NTC signal receiving socket.

4. The inductor testing fixture according to claim 1, characterized in that: The conductive support column includes a support part and an elastic telescopic part integrally formed from top to bottom. The top end of the support part is used to abut against the cylindrical part of the inductor, and the end of the elastic telescopic part is installed on the detection platform.

5. The inductor testing fixture according to claim 1, characterized in that: The testing fixture also includes a mounting plate, and the testing platform is mounted on the upper surface of the mounting plate.

6. The inductor testing fixture according to claim 5, characterized in that: The mounting plate has a second mounting through hole on its surface.

7. The inductor testing fixture according to claim 5, characterized in that: The mounting plate has locking countersunk holes on its surface.

8. The inductor testing fixture according to claim 1, characterized in that: The magnetic core detection post is electrically connected to the magnetic core conductive plate via a wire, and the coil detection post is electrically connected to the coil conductive plate via a wire; The cylindrical detection column is electrically connected to the conductive support column via a conductive sheet, and the conductive sheet is embedded in the upper surface of the detection platform.

9. The inductor testing fixture according to claim 2, characterized in that: The NTC detection post is electrically connected to the NTC signal receiving socket via a wire.

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