CN215340153U

CN215340153U - Magnetic core withstand voltage testing device

Info

Publication number: CN215340153U
Application number: CN202120854913.5U
Authority: CN
Inventors: 侯海彬; 尉晓东
Original assignee: Emicore Corp
Current assignee: Emicore Corp
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-12-28
Anticipated expiration: 2031-04-25

Abstract

The utility model provides a device capable of simply and conveniently carrying out withstand voltage test on a magnetic core. The utility model provides a magnetic core withstand voltage testing device which comprises an insulating base, and a first electrode and a second electrode which are arranged on the insulating base at intervals. The first electrode and the second electrode can be respectively connected with one testing end of the withstand voltage tester, and the magnetic core to be tested can be placed on the two electrodes and respectively connected with the two electrodes. When testing, as long as the magnetic core is basically consistent in position of placing on the electrode, the consistency during testing can be ensured, thereby facilitating the testing and stabilizing the data.

Description

Magnetic core withstand voltage testing device

Technical Field

The utility model relates to the field of electrical testing, in particular to a device for carrying out withstand voltage test on a magnetic core.

Background

The withstand voltage test is an important component of the safety standard of the electric appliance. The voltage withstand test, i.e. high voltage test, is a test for determining whether an electrical device, an insulating material, an insulating structure, etc. meets a predetermined requirement by applying a voltage higher than a rated value thereof for a predetermined time. When the leakage current of the tested product is kept within a specified range, the tested product is qualified in terms of voltage resistance, and if the leakage current exceeds the specified range, the tested product is judged to be unqualified, and the safe use cannot be guaranteed.

The voltage endurance of the magnetic core is an important parameter in the electrical characteristics of the magnetic core, which reflects the electrical safety of the magnetic core under the working condition, including the safety of devices and the safety of operators, so that the voltage endurance test of the magnetic core is generally required. A general test method is to clamp both ends of a magnetic core to be tested with a test chuck of a withstand voltage tester and apply a predetermined voltage to detect a current. The method needs to clamp the two ends of the magnetic core to be tested by the test clamping heads manually every time, the efficiency is low, and the clamping position and the contact area cannot be unified every time, so that the data acquisition has large fluctuation and the voltage resistance of the magnetic core cannot be accurately reflected.

Disclosure of Invention

The utility model mainly aims to provide a device capable of simply and conveniently carrying out withstand voltage test on a magnetic core.

In order to achieve the main object, the present invention provides a magnetic core withstand voltage testing apparatus, which includes an insulating base, and a first electrode and a second electrode spaced apart from each other on the insulating base. The first electrode and the second electrode are respectively connected with one testing end of the withstand voltage tester, and the distance between the first electrode and the second electrode is set to be that the magnetic core to be tested can be placed on the two electrodes and is respectively connected with the two electrodes.

It can be seen by above scheme, before testing the magnetic core, can be connected with two electrodes respectively with the test end of withstanding voltage tester earlier, then place the magnetic core and test on the electrode, take off the magnetic core after a test is accomplished, place next magnetic core can, need not to make the test end and the electrode separation of withstanding voltage tester, thereby withstanding voltage tester and the contact surface of electrode are fixed, as long as guarantee that the position that the magnetic core was placed on the electrode is unanimous basically, uniformity when can guaranteeing the magnetic core test, and the taking off and placing easy operation of magnetic core, thereby the test is convenient, and data are stable.

According to a specific embodiment of the present invention, conductive glue is disposed on surfaces of the first electrode and the second electrode, and the magnetic core to be tested is placed on the conductive glue.

According to the scheme, the arrangement of the conductive adhesive can more effectively ensure the connection between the magnetic core and the electrode.

According to an embodiment of the present invention, the first electrode and the second electrode are provided in a sheet shape and arranged in parallel along a length direction thereof, the first electrode has a first protruding portion protruding outward from one side of the insulating base, and the second electrode has a second protruding portion protruding outward from the other side of the insulating base.

According to the scheme, the two electrodes are arranged in parallel, so that the voltage-withstanding testing device is more compact, and the first extending part and the second extending part are respectively positioned at two sides of the insulating base, so that two testing ends of the voltage-withstanding tester can be conveniently connected with the electrodes respectively.

According to an embodiment of the present invention, the magnetic core withstand voltage testing apparatus further includes a positioning plate disposed above the first electrode and the second electrode, the positioning plate is made of an insulating material and is provided with a positioning hole for placing the magnetic core to be tested.

According to the scheme, the magnetic core to be tested can be placed in the positioning hole in the positioning plate, so that the magnetic core to be tested can be placed at the same position on the electrode at each time, the testing consistency is further guaranteed, the positioning plate made of the insulating material is placed on the electrode, the exposed area of the electrode during testing can be reduced, and the testing is safer.

According to a specific embodiment of the present invention, the positioning hole is provided to have a plurality of positioning portions. According to the scheme, the positioning parts can be suitable for testing various types of magnetic cores.

According to an embodiment of the present invention, the insulating base is provided with a groove, the positioning plate and the first and second electrodes are disposed in the groove, and a width of the positioning plate and a width of the groove are matched with each other. According to the scheme, the insulating base and the positioning plate are matched with each other, so that the electrode and the magnetic core to be tested can be better protected.

According to an embodiment of the present invention, the core withstand voltage testing apparatus further includes a pressing device movable between a pressing position and a releasing position, the pressing device applying a biasing force to the core under test toward the first electrode and the second electrode in the pressing position. According to the scheme, the pressing device applies pressure to the magnetic core to be tested, effective contact between the magnetic core to be tested and the first electrode and effective contact between the magnetic core to be tested and the second electrode can be further guaranteed, and then test data are more accurate.

According to an embodiment of the utility model, the pressing device is arranged on the positioning plate.

According to an embodiment of the utility model, the pressing device is arranged on the insulating base.

In the present invention, the terms "first", "second", and the like are used for distinguishing or referring to the same or similar components or structures, and do not necessarily limit the spatial or temporal sequence of the components or structures, and the descriptions of the orientations of "upper", "lower", "front", "back", and the like are only used for conveniently expressing the relative position relationship among the components/structures, but not for limiting the specific orientation of the components/structures.

To more clearly illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and detailed description.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic perspective view of an embodiment of the present invention with a magnetic core disposed therein;

FIG. 4 is a schematic view of a magnetic core in accordance with an embodiment of the present invention;

FIG. 5 is a schematic view of the cross-sectional structure B-B of FIG. 4;

FIG. 6 is a schematic view of a positioning plate according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a withstand voltage test performed by the embodiment of the present invention.

Detailed Description

Fig. 1 and 2 are schematic structural diagrams of an embodiment of the present invention, and fig. 3 to 5 are schematic structural diagrams of the embodiment of the present invention when a magnetic core to be tested is placed. As shown in fig. 1 to 5, the magnetic core withstand voltage test apparatus includes an insulating base 1, an electrode 2, and a positioning plate 3, wherein the electrode 2 includes an electrode 21 as a first electrode and an electrode 22 as a second electrode, and the positioning plate 3 has a positioning hole in which a magnetic core can be placed when a withstand voltage test is performed. Wherein, the insulating base 1 and the positioning plate 3 are made of insulating materials, and the electrode 2 is made of conductive materials.

The insulating base 1 has a groove formed along the length direction thereof, the sheet-

like electrodes

21 and 22 are disposed in the groove in parallel in the length direction thereof, both surfaces are provided with a conductive paste 23, and it is also possible to provide that the

electrodes

21 and 22 are entirely made of a conductive paste. The two electrodes are separated by a uniform gap, and the width L of the gap is set to be smaller than the length or the width of the magnetic core to be measured, so that the magnetic core can be lapped on the two electrodes, namely the left side and the right side of the bottom surface of the magnetic core are respectively connected with the two electrodes.

The electrode 21 has a protruding portion 211 as a first protruding portion protruding outward from one side, i.e., the rear side, of the insulating base, and the electrode 22 has a protruding portion 221 as a second protruding portion protruding outward from the other side, i.e., the front side, of the insulating base.

Fig. 6 is a schematic structural diagram of the positioning plate in the present embodiment. As shown in fig. 6, the positioning plate 3 has a positioning hole 31, and the positioning hole 31 has a plurality of positioning

portions

311, 312, 313, 314, which can be set according to actual needs, for example, the width of the positioning portion can be used to define the length or width of the magnetic core, one or both ends of the magnetic core are abutted with the positioning portions to fixedly place the magnetic core in the positioning hole, and different types of magnetic cores are placed in different positions. When the positioning plate is placed on the insulating base 1, the side wall of the positioning plate can be attached to the inner side wall of the groove of the insulating base, i.e. the width of the positioning plate matches with the width of the groove.

A hold-down device (not shown) may also be included in this embodiment, the hold-down device being movable between a hold-down position in which the core under test exerts a biasing force towards the electrode, and a release position. Wherein the pressing device can be arranged to be pivotally fixed on the positioning plate 3 or the insulating base 1, and after the magnetic core 4 is placed in the positioning hole 31, the pressing device is rotated to press the magnetic core, so that the bottom surface of the magnetic core 4 is tightly connected with the conductive adhesive.

When the withstand voltage testing device 10 is assembled, the two

electrodes

21 and 22 are placed in parallel in the groove, wherein the electrode 21 can be attached to the left side wall of the groove, and the electrode 22 can be attached to the right side wall, so that the width of the groove can be reduced, and the structure is compact. One end of the electrode 21 extends from the rear side of the insulating base to form a protruding portion 211, the other end is preferably located in the slot, one end of the electrode 22 extends from the front side of the insulating base to form a protruding portion 221, the other end is also preferably located in the slot, and the distance L between the

electrodes

21 and 22 is smaller than the length or width of the magnetic core to be tested (depending on the placement direction of the magnetic core, but the lap joint between the two sides of the bottom surface of the magnetic core and the two electrodes is ensured). The

electrodes

21, 22 have their faces with the conductive paste facing upwards. Then put into locating plate 3, make the locating plate sticis the conducting resin 23 of two electrodes, the both sides wall 32 of locating plate can laminate with the inside wall of groove respectively to except that the extension of electrode and locating hole expose the part, other parts are all covered by insulating base and locating plate that insulating material made, and then can make the test safer.

Fig. 7 is a schematic view showing a structure in the case of performing a withstand voltage test using this embodiment. As shown in fig. 7, the withstanding voltage tester 100 has two testing terminals 101 arranged in a clip shape, and the connection of the withstanding voltage tester 100 to the withstanding voltage testing apparatus 10 is realized by connecting the testing terminals to the electrodes.

During testing, one testing end 101 of the withstand voltage tester is enabled to clamp the extending part 211 of the electrode 21, the other testing end is enabled to clamp the extending part 221 of the electrode 22, then the magnetic core 4 is placed into the positioning hole 31 and is limited by one positioning part of the positioning hole 31, the magnetic core is pressed tightly, the left side and the right side of the bottom surface of the magnetic core are respectively tightly connected with the two electrodes, then the withstand voltage tester is started to conduct testing, after the testing of one magnetic core 4 is completed, the magnetic core 4 can be taken out, and the next magnetic core is placed into the positioning hole 31 to conduct testing.

Although the utility model has been described with respect to preferred embodiments, it will be understood by those skilled in the art that various changes may be made without departing from the scope of the utility model, and equivalents may be substituted for elements thereof without departing from the scope of the utility model.

Claims

1. Magnetic core withstand voltage testing arrangement includes:

an insulating base;

the first electrode and the second electrode are arranged on the insulating base at intervals;

the first electrode and the second electrode are respectively connected with one testing end of the withstand voltage tester, and the distance between the first electrode and the second electrode is set to be that the magnetic core to be tested can be placed on the two electrodes and is respectively connected with the two electrodes.

2. The core withstand voltage test apparatus according to claim 1, wherein: and conductive adhesive is arranged on the surfaces of the first electrode and the second electrode, and the magnetic core to be tested is placed on the conductive adhesive.

3. The core withstand voltage test apparatus according to claim 2, wherein: the first electrode and the second electrode are arranged in a sheet shape and are arranged in parallel along the length direction of the first electrode, the first electrode is provided with a first extending part extending outwards from one side of the insulating base, and the second electrode is provided with a second extending part extending outwards from the other side of the insulating base.

4. The core withstand voltage test apparatus according to any one of claims 1 to 3, wherein: the magnetic core withstand voltage testing device further comprises a positioning plate arranged above the first electrode and the second electrode, the positioning plate is made of insulating materials and is provided with a positioning hole used for placing the magnetic core to be tested.

5. The core withstand voltage test apparatus according to claim 4, wherein: the positioning hole is provided with a plurality of positioning portions.

6. The core withstand voltage test apparatus according to claim 4, wherein: the insulating base is provided with a groove, the positioning plate, the first electrode and the second electrode are arranged in the groove, and the width of the positioning plate is matched with the width of the groove.

7. The core withstand voltage test apparatus according to claim 4, wherein: the magnetic core withstand voltage testing device further comprises a pressing device which can move between a pressing position and a releasing position, and the pressing device applies a biasing force towards the first electrode and the second electrode to the magnetic core to be tested when in the pressing position.

8. The core withstand voltage test apparatus according to claim 7, wherein: the pressing device is arranged on the positioning plate.

9. The core withstand voltage test apparatus according to claim 7, wherein: the pressing device is arranged on the insulating base.