Single-phase inductor insulation resistance test fixture

Abstract

The utility model provides a single-phase inductor insulation resistance test fixture, the whole test fixture is of a hollow cuboid structure, and a single-phase inductor is placed in the test fixture; the single-phase inductor comprises two terminal endpoints and a middle magnet, probes are arranged at the positions, corresponding to the two terminal endpoints, of the top and the bottom of one side face of the testing jig, conducting layers making contact with the magnet are arranged on the inner walls of the two side faces of the testing jig, the conducting layers on one sides of the terminal endpoints transversely penetrate through the side faces, and the conducting layers on the other sides of the terminal endpoints transversely penetrate through the middle magnet. The other side surface is fully covered with a conductive layer; connecting wires are led out of the probe and the conductive layer and are inserted into insulation resistance testing equipment. According to the utility model, through the structural design of the test tool, especially the arrangement of the conductive layer, the insulation resistance of the inductor can be tested at one time, so that the test efficiency can be improved, the test accuracy can be improved, and the risk that defective products flow out is greatly reduced; the jig is simple in structure, convenient to use and wide in application range, and the test difficulty can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to resistance test technical field relates to a single phase inductance insulation resistance test fixture. BACKGROUND

[0002] Inductance is an important electronic component in electronic circuit, is widely used in power transmission, communication equipment, electronic instrument and other fields. Inductor is generally composed of framework, winding, shielding cover, packaging material, magnetic core, wherein the packaging material usually selects insulating material, and when the resistance of the insulating material in inductance drops or insulation is damaged, light causes circuit short circuit, electric appliance damage, serious possible current leakage, there is the risk of electric shock, equipment failure and even the possibility of fire and other dangerous situations, thus in order to ensure that the insulation resistance (IR) of inductance insulating material meets the safety specification, insulation resistance test needs to be carried out on inductance product before shipment.

[0003] At present, the test method of single phase inductance is generally that the positive connection channel (CH+) probe contacts the two end points of the terminal, and the negative connection channel (CH-) probe contacts a point on the magnet between the two end points of the terminal, and the IR test between the terminal and the magnet is carried out. This test method can only test the insulation resistance between the terminal end point and a point in the magnet between them at a time, so the insulation resistance values of other points on the magnet are not tested, and it is impossible to truly determine whether the insulation resistance between the terminal and the magnet is appropriate, and there is still a risk of a large number of defective products. Therefore, a suitable insulation resistance testing device needs to be selected according to the structure of inductance, so that it can test the insulation resistance of the terminal and the magnet in all directions at a time.

[0004] CN 211603342U discloses a common mode inductance insulation resistance testing device, including insulation resistance testing device body, its top end fixedly connected with winding box, the top end of winding box is symmetrically provided with through hole, the through hole is equipped with winding pipe, the bottom end of winding pipe is fixedly connected with the inner wall of the bottom end of winding box, the first threaded column is arranged in the winding pipe, and the top end of the rotating disc located at the top end of the winding box is fixedly connected with the first threading hole. The top end of the rotating disc is provided with a first threading hole, and the bottom side of the winding pipe is provided with a second threading hole. The patent is to describe the internal specific structure of the insulation resistance testing device, to freely adjust the length of the wire outside the winding box, and to shrink into the winding box when not in use, which is convenient for storage. However, it does not clearly show how to test the insulation resistance of inductance in all directions, and the patent is to improve the testing device itself, rather than to design a jig for inductance structure to improve the testing efficiency and accuracy.

[0005] CN 220051475U discloses a kind of insulation resistance clamping synchronous rotating mechanism, the rotating mechanism includes first installation side plate, second installation side plate and reference bottom plate, first, second installation side plate are close to the side of reference bottom plate and are fixedly connected with reference bottom plate, the opposite end of first, second installation side plate is fixedly connected with connecting shaft, the bottom of reference bottom plate is fixedly connected with mounting plate, motor is fixedly connected with the left side of mounting plate and located in the inside of first installation side plate, the inside of first, second installation side plate is provided with bearing, the inside of two bearings is provided with rotating shaft, the two sides of rotating shaft are fixedly connected with first connecting rod.The structure is the clamping structure of insulation resistance, to avoid the problem of instability in the process of rotation, which is different from the jig structure required when detecting insulation resistance, and a special jig structure needs to be designed according to the structure and type of product.

[0006] In summary, for the all-around insulation resistance test of single-phase inductor product, the corresponding jig structure needs to be designed according to the structure of single-phase inductor, so that it can better match the electric energy, facilitate the all-around insulation resistance value between the terminal and magnet in inductor, improve the efficiency and accuracy of test, and avoid the production of defective products. Utility model content

[0007] In view of the problems existing in the prior art, the utility model aims at providing a kind of single-phase inductor insulation resistance test jig, by designing the test jig matched with the structure of single-phase inductor, especially by the setting of conductive layer, the insulation resistance between magnet and terminal end point in inductor can be tested at one time, which improves the test efficiency and the accuracy of test, and avoids the problem that the risk of defective product is higher when single-point testing.

[0008] To achieve this purpose, the utility model adopts the following technical solutions:

[0009] The utility model provides a kind of single-phase inductor insulation resistance test jig, the test jig is hollow cuboid structure as a whole, the single-phase inductor is placed in the test jig, and the structure is matched with the test jig;The single-phase inductor includes two terminal end points and intermediate magnet, the top and bottom of one side of the test jig are provided with probe corresponding to the position of the two terminal end points, the conductive layer is arranged on the inner wall of two sides of the test jig, the conductive layer is in contact with the magnet in the single-phase inductor, wherein, the conductive layer on the side of terminal end point side is first conductive layer, the first conductive layer is located between the two terminal end points and transversely penetrates the side, and the conductive layer that covers the other side opposite to terminal end point side is second conductive layer;The probe and the conductive layer are connected with line and inserted into insulation resistance test equipment.

[0010] The utility model discloses, to the test of inductance insulation resistance, based on the problem that traditional test method can only test single point on magnet once, the utility model discloses the structure of test fixture is designed to make its structure match single phase inductance, especially through the design of conductive layer, magnet and conductive layer contact, so that the test of each point on magnet can be unified to the conductive layer, by connecting test line to the conductive layer, the magnet can be tested all -round once, which can effectively improve the efficiency of test, and can improve the accuracy of test, and the defective product is not misjudged as good product due to the leakage, greatly reduce the risk of defective product outflow, the fixture structure is simple, convenient to use, can reduce the difficulty of test, and the scope of application is wide.

[0011] The following is the preferred technical scheme of the utility model, but not as the restriction of the technical scheme provided by the utility model, through the following technical scheme, the technical purpose and beneficial effect of the utility model can be better achieved and realized.

[0012] As the preferred technical scheme of the utility model, the top of the test fixture is opened, and the single phase inductance is placed longitudinally in the test fixture, and the two terminal end points are located at the top and the bottom of one side of the test fixture.

[0013] As the preferred technical scheme of the utility model, the material of the test fixture includes any one of bakelite, synthetic stone or glass fiber plate.

[0014] As the preferred technical scheme of the utility model, the height of the position corresponding to the terminal end point of the side surface of the test fixture independently accounts for 20-30% of the height of the side surface, for example, 20%, 22%, 24%, 25%, 26%, 28% or 30%, but is not limited to the listed values, and other values not listed in the value range are also applicable; its width independently accounts for 25-35% of the width of the side surface, for example, 25%, 27%, 28%, 30%, 32%, 34% or 35%, but is not limited to the listed values, and other values not listed in the value range are also applicable.

[0015] In the utility model, based on the structure of the terminal end point on the inductance, the corresponding position on the test fixture matches, a probe is arranged at the position, and the probe contacts the terminal end point, so that the probe can be connected to the tester as a test end, and the two terminal end points are connected in parallel.

[0016] As the preferred technical scheme of the utility model, the material of the conductive layer includes any one of conductive silicone, conductive foam or conductive rubber.

[0017] As the preferred technical scheme of the utility model, the thickness of the conductive layer is 1-2mm, such as 1mm, 1.2mm, 1.4mm, 1.5mm, 1.6mm, 1.8mm or 2mm, but is not limited to the listed values, and other values not listed in the value range are also applicable.

[0018] As the preferred technical scheme of the utility model, the first conductive layer does not contact the position of the terminal end point, and the width accounts for 25-35% of the height of the test fixture side, such as 25%, 27%, 28%, 30%, 32%, 34% or 35%, but is not limited to the listed values, and other values not listed in the value range are also applicable.

[0019] In the utility model, after the conductive layer is arranged, whether it is in good contact with the magnet in the inductor is an important factor affecting the test result, so the structure size of the fixture and the thickness of the conductive layer are controlled to avoid the problem that the size difference is too large to maintain good contact, and the problem that the size is too small to cause the inductor to be unable to be placed or to affect the inductor structure.

[0020] As the preferred technical scheme of the utility model, the insulation resistance test equipment is an insulation resistance tester, and the insulation resistance tester is provided with a positive connection channel (CH+) and a negative connection channel (CH-).

[0021] As the preferred technical scheme of the utility model, the probes at the two terminal end points each lead out a connecting line to be plugged into the positive connection channel (CH+) of the insulation resistance tester, and the connecting lines led out at the conductive layer are each plugged into the negative connection channel (CH-) of the insulation resistance tester.

[0022] As the preferred technical scheme of the utility model, the structure of the insulation resistance tester further includes a positive connection channel (CH+) interface, a negative connection channel (CH-) interface, a display screen and an input button, different interfaces can be set as the positive connection channel (CH+) interface or the negative connection channel (CH-) interface according to needs, and the test voltage and the IR qualified range also need to be set.

[0023] In the utility model, the probes and the conductive layer on the test fixture lead out connecting lines, the probes at the terminal end points are connected to the interface of the positive connection channel of the IR tester, and the connecting lines of the conductive layer in contact with the magnet are connected to the interface of the negative connection channel of the IR tester; the tester is set with corresponding test parameters, the inductor is put into the fixture to be tested, and whether the inductor is a good product or a defective product is determined according to the set standard.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] (1) The utility model discloses a test fixture matched with single-phase inductance structure, especially through the setting of conductive layer, the insulation resistance between the magnet and terminal end point in the inductance can be tested at one time, which can effectively improve the test efficiency and the accuracy of the test, and the risk of the defective product outflow is greatly reduced.

[0026] (2) The utility model discloses the simple structure of jig, convenient to use, can reduce the test difficulty, and the wide range of application. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is the partial main view of the single-phase inductance after being placed in the insulation resistance test fixture provided by the utility model embodiment 1.

[0028] Figure 2 It is the partial side view of the single-phase inductance after being placed in the insulation resistance test fixture provided by the utility model embodiment 1.

[0029] Wherein, 1-terminal end point, 2-magnet, 3-first conductive layer, 4-second conductive layer. DETAILED DESCRIPTION

[0030] In order to better illustrate the utility model, facilitate understanding the technical scheme of the utility model, the utility model is further explained in detail below, but the following embodiment is only a simple example of the utility model, and does not represent or limit the right protection scope of the utility model, and the utility model protection scope is accurate to the right claim.

[0031] The following is a typical but non-limiting embodiment of the utility model:

[0032] Embodiment 1:

[0033] The embodiment provides a single-phase inductance insulation resistance test fixture, the test fixture is overall hollow cuboid structure, the single-phase inductance is placed in the test fixture, and is matched with the structure of the test fixture, wherein the partial main view of the single-phase inductance after being placed in the test fixture is as shown in Figure 1 , and the partial side view is as shown in Figure 2 , Figure 1 and Figure 2The side wall of the test fixture is not shown; the single-phase inductor includes two terminal end points 1 and a middle magnet 2, the top and bottom of one side of the test fixture correspond to the positions of the two terminal end points 1 and are provided with probes, and the inner walls of the two sides of the test fixture are each provided with a conductive layer that contacts the magnet 2 in the single-phase inductor, wherein the conductive layer on the side of the terminal end points 1 is a first conductive layer 3, the first conductive layer 3 is located between the two terminal end points 1 and transversely penetrates the side, and the conductive layer that fully covers the other side opposite to the terminal end points 1 is a second conductive layer 4; the probes and the conductive layers are each connected to a connection line that is plugged into an insulation resistance test device.

[0034] The test fixture is open at the top, and the single-phase inductor is longitudinally placed in the test fixture, and the two terminal end points 1 are respectively located at the top and bottom of one side of the test fixture.

[0035] The material of the test fixture is bakelite.

[0036] The height of the side of the test fixture corresponding to the position of the terminal end points 1 accounts for 25% of the height of the side, and the width accounts for 30% of the width of the side.

[0037] The material of the conductive layer is conductive silicone.

[0038] The thickness of the conductive layer is 1 mm.

[0039] The first conductive layer 3 does not contact the position of the terminal end points 1, and the width accounts for 30% of the height of the side of the test fixture.

[0040] The insulation resistance test device is an insulation resistance tester, and the insulation resistance tester is provided with a positive connection channel and a negative connection channel.

[0041] The probes at the two terminal end points 1 each lead out a connection line that is plugged into the positive connection channel of the insulation resistance tester, and the connection lines led out at the conductive layers are each plugged into the negative connection channel of the insulation resistance tester.

[0042] The structure of the insulation resistance tester further includes a positive connection channel interface, a negative connection channel interface, a display screen, and an input button.

[0043] Embodiment 2:

[0044] The embodiment provides a single-phase inductor insulation resistance test fixture, the test fixture is in the form of a hollow cuboid structure as a whole, the single-phase inductor is placed in the test fixture and matches the structure of the test fixture; the single-phase inductor comprises two terminal end points 1 and an intermediate magnet 2, probes are arranged on the top and bottom of one side of the test fixture and correspond to the positions of the two terminal end points 1, a conductive layer is arranged on the inner wall of each of the two sides of the test fixture, the conductive layer is in contact with the magnet 2 in the single-phase inductor, wherein the conductive layer on the side of the terminal end point 1 is a first conductive layer 3, the first conductive layer 3 is located between the two terminal end points 1 and transversely penetrates the side, and the conductive layer fully covering the other side opposite to the terminal end point 1 is a second conductive layer 4; the probes and the conductive layer are both connected to the insulation resistance test equipment through connection lines.

[0045] The test fixture is open at the top, and the single-phase inductor is longitudinally placed in the test fixture, and the two terminal end points 1 are respectively located at the top and bottom of one side of the test fixture.

[0046] The material of the test fixture is synthetic stone.

[0047] The height of the side of the test fixture corresponding to the position of the terminal end point 1 accounts for 20% of the height of the side, and the width accounts for 25% of the width of the side.

[0048] The material of the conductive layer is conductive foam.

[0049] The thickness of the conductive layer is 1.5 mm.

[0050] The first conductive layer 3 does not contact the position of the terminal end point 1, and the width accounts for 25% of the height of the side of the test fixture.

[0051] The insulation resistance test equipment is an insulation resistance tester, and the insulation resistance tester is provided with a positive connection channel and a negative connection channel.

[0052] The probes at the two terminal end points 1 are both connected to the positive connection channel of the insulation resistance tester through a connection line, and the connection lines led out at the conductive layer are all connected to the negative connection channel of the insulation resistance tester.

[0053] The structure of the insulation resistance tester further comprises a positive connection channel interface, a negative connection channel interface, a display screen and an input button.

[0054] Embodiment 3:

[0055] The embodiment provides a single-phase inductor insulation resistance test fixture, the test fixture is in the form of a hollow cuboid structure as a whole, the single-phase inductor is placed in the test fixture and matches the structure of the test fixture; the single-phase inductor comprises two terminal end points 1 and an intermediate magnet 2, probes are arranged on the top and bottom of one side of the test fixture and correspond to the positions of the two terminal end points 1, a conductive layer is arranged on the inner wall of each of two sides of the test fixture, the conductive layer is in contact with the magnet 2 in the single-phase inductor, wherein the conductive layer on the side of the terminal end point 1 is a first conductive layer 3, the first conductive layer 3 is located between the two terminal end points 1 and transversely penetrates the side, and the conductive layer fully covering the other side opposite to the terminal end point 1 is a second conductive layer 4; the probes and the conductive layer are both connected with connecting lines and are connected to an insulation resistance test device.

[0056] The test fixture is open at the top, and the single-phase inductor is longitudinally placed in the test fixture, and the two terminal end points 1 are respectively located at the top and bottom of one side of the test fixture.

[0057] The material of the test fixture is a glass fiber plate.

[0058] The height of the side of the test fixture corresponding to the position of the terminal end point 1 accounts for 30% of the height of the side, and the width accounts for 35% of the width of the side.

[0059] The material of the conductive layer is conductive rubber.

[0060] The thickness of the conductive layer is 2 mm.

[0061] The first conductive layer 3 does not contact the position of the terminal end point 1, and the width accounts for 35% of the height of the side of the test fixture.

[0062] The insulation resistance test device is an insulation resistance tester, and the insulation resistance tester is provided with a positive connection channel and a negative connection channel.

[0063] The probes at the two terminal end points 1 are both connected with a connecting line and are connected to the positive connection channel of the insulation resistance tester, and the connecting lines connected at the conductive layer are all connected to the negative connection channel of the insulation resistance tester.

[0064] The structure of the insulation resistance tester further comprises a positive connection channel interface, a negative connection channel interface, a display screen and an input button.

[0065] Comparative Example 1:

[0066] The test fixture of the comparative example 1 is a single-phase inductance insulation resistance test fixture, and the structure of the test fixture is referred to the structure in the embodiment 1, and the difference is that the conductive layer is not arranged on the inner wall of the side of the test fixture, and the connecting wire led by the conductive layer is also changed to the probe.

[0067] The insulation resistance of the single-phase inductance is tested by using the test fixture in the above embodiment and the comparative example, when the test fixture in the embodiment is used, because the two-side conductive layers are arranged, the resistance value displayed by the insulation resistance tester during the test can be divided into two parts, one is the resistance value between the terminal end point and the first conductive layer, and the other is the resistance value between the terminal end point and the second conductive layer, and when the test fixture in the comparative example 1 is used, only the resistance value between the terminal end point and a point on the magnet is obtained, and the test of the points on the magnet in the comparative example 1 cannot be completed at one time, and the accuracy of the test is obviously lower than that of the embodiment.

[0068] Taking a single-phase inductance as an example, the insulation resistance is tested by using 50V voltage, when the test fixture in the embodiment 1 is used, the IR value between the terminal end point and the first conductive layer is only 1.6kΩ, and when the test fixture in the comparative example 1 is used, the IR value between the terminal end point and the point on the magnet is 1.1MΩ, and thus it can be seen that the inductance in the comparative example 1 is not a defective product, and the test fixture in the embodiment 1 can effectively improve the accuracy of the test of the single-phase inductance product, and the accuracy can reach more than 99%, and the test accuracy in the comparative example is only about 90%.

[0069] It can be seen from the above embodiment and the comparative example that the test fixture matched with the structure of the single-phase inductance is designed, especially by arranging the conductive layer, the insulation resistance between the magnet in the inductance and the terminal end point can be tested at one time, the test efficiency can be effectively improved, the accuracy of the test can be improved, the defective product is not misjudged as a good product due to the missed test, the risk of the defective product flowing out is greatly reduced, the structure of the fixture is simple, the fixture is convenient to use, the test difficulty can be reduced, and the fixture is suitable for a wide range of applications.

[0070] The applicant declares that the detailed device of the utility model is illustrated by the above embodiment, but the utility model is not limited to the above detailed device, that is, it does not mean that the utility model must rely on the above detailed device to be implemented. It should be understood by those skilled in the art that any improvement of the utility model, equivalent replacement of the device of the utility model and addition of auxiliary devices, selection of specific modes and the like fall within the protection scope and the disclosure scope of the utility model.

Claims

1. A single-phase inductance insulation resistance test fixture, characterized in that, The test fixture is in the overall structure of a hollow cuboid, the single-phase inductor is placed in the test fixture and matches the structure of the test fixture; the single-phase inductor comprises two terminal ends and a middle magnet, the top and bottom of one side of the test fixture correspond to the positions of the two terminal ends and are provided with probes, the inner walls of the two sides of the test fixture are each provided with a conductive layer, the conductive layer contacts the magnet in the single-phase inductor, wherein the conductive layer on the side of the terminal end is a first conductive layer, the first conductive layer is located between the two terminal ends and transversely penetrates the side, and the conductive layer fully covering the other side opposite to the terminal end is a second conductive layer; the probes and the conductive layers are each connected to a connection line and are plugged into an insulation resistance test device.

2. The single phase inductance insulation resistance test fixture of claim 1, wherein, The test fixture is open at the top, and the single-phase inductor is longitudinally placed in the test fixture, and the two terminal ends are respectively located at the top and bottom of one side of the test fixture.

3. The single phase inductance insulation resistance test fixture of claim 1, wherein, The material of the test fixture comprises any one of bakelite, synthetic stone or glass fiber plate.

4. The single phase inductance insulation resistance test fixture of claim 1, wherein, The height of the side of the test fixture corresponding to the position of the terminal end independently accounts for 20-30% of the height of the side, and the width independently accounts for 25-35% of the width of the side.

5. The single phase inductance insulation resistance test fixture of claim 1, wherein, The material of the conductive layer comprises any one of conductive silica gel, conductive foam or conductive rubber.

6. The single phase inductance insulation resistance test fixture of claim 1, wherein, The thickness of the conductive layer is 1-2 mm.

7. The single phase inductance insulation resistance test fixture of claim 1, wherein, The first conductive layer does not contact the position of the terminal end, and the width accounts for 25-35% of the height of the side of the test fixture.

8. The single phase inductance insulation resistance test fixture of claim 1, wherein, The insulation resistance test device is an insulation resistance tester, and the insulation resistance tester is provided with a positive connection channel and a negative connection channel.

9. The single phase inductance insulation resistance test fixture of claim 8, wherein, The probes at the two terminal ends are each connected to a connection line and are plugged into the positive connection channel of the insulation resistance tester, and the connection lines connected at the conductive layers are each plugged into the negative connection channel of the insulation resistance tester.

10. The single phase inductance insulation resistance test fixture of claim 8, wherein, The structure of the insulation resistance tester further comprises a positive connection channel interface, a negative connection channel interface, a display screen and an input button.

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