Magnetic field generating device for electromagnetic relay test and test equipment

Abstract

The utility model belongs to the field of electrical performance testing devices, and particularly relates to a magnetic field generating device for testing an electromagnetic relay and testing equipment. In order to solve the technical problems that a relay detection system in the prior art cannot test fault modes and defects of an electromagnetic relay in an environmental magnetic field and cannot provide guidance for research and development of the electromagnetic relay, the utility model provides a magnetic field generating device for testing the electromagnetic relay. The magnetic field generation device comprises a rack, and the rack is provided with a relay installation part, a magnetic field generation part and a detection device wiring part used for being externally connected with a relay detection device. The relay mounting portion is located in an ambient magnetic field during use. The utility model also provides test equipment comprising the magnetic field generating device. The magnetic field generation part applies an environmental magnetic field, and the relay detection device is used for detecting the magnetic interference resistance of the relay, so that the relay and fault modes and defects are found, and guidance is provided for development of domestic relays in a targeted manner.

Description

Technical Field

[0001] The utility model belongs to the field of electrical performance testing devices, in particular to a magnetic field generating device and testing equipment for electromagnetic relay testing. Background Art

[0002] Electromagnetic relays are one of the main components of power control and protection equipment. For example, electromagnetic relays are the control components inside the electric energy meter. Through electromagnetic relays, residential electric energy meters can be remotely opened and closed. Of course, electromagnetic relays can also be used in other electrical equipment.

[0003] During the use of electromagnetic relays, electrical energy is converted into magnetic field energy. When the magnetic field energy reaches the set value, the electromagnetic relay closes. When the electromagnetic relay is actually used, the environmental magnetic field will interfere with the magnetic field inside the electromagnetic relay, causing the total magnetic field inside the electromagnetic relay to change. When the direction of the environmental magnetic field is opposite to the direction of the magnetic field generated by the electromagnetic relay, the magnetic field generated by the electromagnetic relay will be weakened by the environmental magnetic field, causing the electromagnetic relay's suction force to become smaller or unable to close normally; when the direction of the environmental magnetic field is the same as the direction of the magnetic field generated by the electromagnetic relay, the magnetic field generated by the electromagnetic relay will be enhanced by the environmental magnetic field, causing the relay to malfunction.

[0004] The environmental magnetic field also affects the performance parameters of the electromagnetic relay, such as the contact resistance. Therefore, when the electromagnetic relay is actually used, the electromagnetic relay coil should be equipped with a shielding cover (such as the Chinese utility model patent with the authorization announcement number CN203013631U and the authorization announcement date of 2013.06.19) to reduce the impact of the environmental magnetic field on the electromagnetic relay. At the same time, in the research and development process of the electromagnetic relay, it is also necessary to pay attention to the impact of the environmental magnetic field on the electromagnetic relay to improve the stability and reliability of the electromagnetic relay.

[0005] When testing an electromagnetic relay, a relay detection device is required to detect the electromagnetic relay. However, in the prior art, when detecting an electromagnetic relay, only the parameters of the electromagnetic relay when there is no environmental magnetic field (i.e., normal operation) are tested, and the anti-magnetic interference capability of the electromagnetic relay (i.e., the ability to resist interference from the environmental magnetic field) is not tested, and the failure mode and defects of the electromagnetic relay under the environmental magnetic field cannot be tested.

[0006] For example, a Chinese invention patent application with the publication number CN106772023A and the publication date of May 31, 2017 discloses a relay detection system based on an improved guide rail to avoid magnetic field interference. In this detection system, a relay tester (i.e., a relay detection device) is used to detect the relay, and thus the pull-in voltage of the relay without an ambient magnetic field is measured. Therefore, the above relay detection system cannot test the anti-magnetic interference ability of the electromagnetic relay, nor can it test the failure modes and defects of the electromagnetic relay under an ambient magnetic field, and cannot provide guidance for the research and development of electromagnetic relays. Utility Model Content

[0007] The purpose of the present utility model is to provide a magnetic field generating device for testing electromagnetic relays, so as to solve the technical problem that the relay detection system in the prior art cannot test the anti-magnetic interference ability of electromagnetic relays, nor can it test the failure modes and defects of electromagnetic relays under an ambient magnetic field, and cannot provide guidance for the research and development of electromagnetic relays.

[0008] The purpose of the present utility model is also to provide a testing device for electromagnetic relays to solve the same above-mentioned technical problems.

[0009] To achieve the above purpose, the technical solution of the magnetic field generating device for testing electromagnetic relays provided by the present utility model is as follows:

[0010] A magnetic field generating device for testing electromagnetic relays includes a frame. The frame is provided with a relay mounting part for mounting at least one relay, a magnetic field generating part for generating an ambient magnetic field, and a detection device wiring part for externally connecting a relay detection device. The relay mounting part is provided with a relay wiring part for electrically connecting with the relay, and the relay wiring part and the detection device wiring part are electrically connected; the relay mounting part is located in the ambient magnetic field during use.

[0011] Furthermore, the magnetic field generating part includes a coil for passing alternating current.

[0012] Furthermore, the coil is a toroidal coil. A rotating shaft is connected to the coil, and the rotation axis of the rotating shaft extends horizontally. The frame is provided with a rotational power source for driving the rotating shaft to drive the coil to rotate; the axis of the coil and the rotation axis of the coil are perpendicular to each other; the relay mounting part is located inside the coil.

[0013] Furthermore, the magnetic field generating part includes at least one permanent magnet arranged on the periphery of the relay mounting part.

[0014] Furthermore, a telescopic hinge is provided on the side of at least one permanent magnet away from the relay mounting part, and the telescopic direction of the telescopic hinge is the same as the arrangement direction of the permanent magnet and the relay mounting part.

[0015] Further, the magnetic field generating part further includes at least one permanent magnet disposed around the relay mounting part, and the at least one permanent magnet is disposed on the coil.

[0016] Further, a double-layer shaft is provided on the frame. The double-layer shaft includes an outer sleeve and a support shaft located inside the outer sleeve. The outer sleeve constitutes the rotating shaft. A bracket is fixedly connected to the support shaft, and the relay mounting part is disposed on the bracket.

[0017] Further, the relay mounting part is used to mount at least two different relays for comparative experiments.

[0018] Further, a turntable and a rotary power source for driving the turntable to rotate are also mounted on the frame. The rotation axis of the turntable extends in the vertical direction; the relay mounting part is located on the turntable.

[0019] The beneficial effects of the magnetic field generating device for electromagnetic relay testing provided by the present utility model are as follows: The present utility model is a pioneering invention. The relay can be mounted on the relay mounting part, and the magnetic field generating part can generate an ambient magnetic field. Since the relay mounting part is located in the ambient magnetic field during use, the relay is in the ambient magnetic field during use; through the detection device wiring part, the magnetic field generating device for electromagnetic relay testing and the relay detection device can be electrically connected. Since the relay is electrically connected to the relay wiring part during use, and the relay wiring part is electrically connected to the detection device wiring part, the anti-magnetic interference ability of the relay can be measured through an external relay detection device, thereby providing guidance for the research and development of relays.

[0020] To achieve the above object, the technical solution of the electromagnetic relay testing equipment provided by the present utility model is:

[0021] An electromagnetic relay testing equipment includes a relay detection device and a magnetic field generating device for electromagnetic relay testing; the magnetic field generating device for electromagnetic relay testing includes a frame, on which there are provided a relay mounting part for mounting at least one relay, a magnetic field generating part for generating an ambient magnetic field, and a detection device wiring part for externally connecting a relay detection device. The relay mounting part is provided with a relay wiring part for electrically connecting to the relay, and the relay wiring part is electrically connected to the detection device wiring part; the relay mounting part is located in the ambient magnetic field during use.

[0022] Further, the magnetic field generating part includes a coil for passing alternating current.

[0023] Further, the coil is an annular coil, a rotating shaft is connected to the coil, the rotation axis of the rotating shaft extends horizontally, and a rotating power source for driving the rotating shaft to drive the coil to rotate is provided on the frame; the axis of the coil is perpendicular to the rotation axis of the coil; the relay mounting part is located inside the coil.

[0024] Furthermore, the magnetic field generating part includes at least one permanent magnet arranged on the periphery of the relay mounting part.

[0025] Furthermore, on the side of at least one permanent magnet away from the relay mounting part, a telescopic hinge is provided, and the telescopic direction of the telescopic hinge is the same as the arrangement direction of the permanent magnet and the relay mounting part.

[0026] Furthermore, the magnetic field generating part further includes at least one permanent magnet arranged on the periphery of the relay mounting part, and at least one permanent magnet is arranged on the coil.

[0027] Furthermore, a double-layer shaft is provided on the frame. The double-layer shaft includes an outer sleeve and a support shaft located inside the outer sleeve. The outer sleeve constitutes the rotating shaft, and a bracket is fixedly connected to the support shaft. The relay mounting part is arranged on the bracket.

[0028] Furthermore, the relay mounting part is used to mount at least two different relays for conducting comparative experiments.

[0029] Furthermore, a turntable and a rotary power source for driving the turntable to rotate are also mounted on the frame. The rotation axis of the turntable extends in the vertical direction; the relay mounting part is located on the turntable.

[0030] The beneficial effects of the electromagnetic relay testing equipment provided by the present utility model are as follows: The present utility model is a pioneering invention. The relay can be mounted on the relay mounting part, and the magnetic field generating part can generate an ambient magnetic field. Since the relay mounting part is located in the ambient magnetic field during use, the relay is in the ambient magnetic field during use; through the detection device wiring part, the magnetic field generating device for electromagnetic relay testing and the relay detection device can be electrically connected. Since the relay is electrically connected to the relay wiring part during use, and the relay wiring part is also electrically connected to the detection device wiring part, the anti-magnetic interference ability of the relay can be measured through an externally connected relay detection device, thereby providing guidance for the research and development of relays. Description of the Drawings

[0031] Figure 1 It is the front view schematic diagram of the magnetic field generating device for electromagnetic relay testing in the electromagnetic relay testing equipment of the present utility model;

[0032] Figure 2 is Figure 1 the enlarged structure diagram of part A in

[0033] Figure 3 It is the structural schematic diagram of the relay detection device in the electromagnetic relay testing equipment of the present utility model;

[0034] Figure 4 is Figure 1 the view taken along the line B-B in

[0035] Figure 5 is Figure 2 a schematic structural diagram of a relay detection board in

[0036] Figure 6 is Figure 2 a schematic structural diagram of another relay detection board in

[0037] Description of the reference numerals in the drawings:

[0038] 1. Frame; 2. Coil; 31. Upper permanent magnet; 32. Left permanent magnet; 33. Right permanent magnet; 34. Lower permanent magnet; 35. Front permanent magnet; 36. Rear permanent magnet; 4. Telescopic hinge; 5. Double-layer shaft; 51. Rotating shaft; 52. Support shaft; 6. Horizontal rotation motor; 7. U-shaped bracket; 8. Detection device wiring part; 9. AC power wiring part; 10. Relay detection board; 11. First transfer wiring part; 12. Relay detection device; 13. Coil drive motor; 14. Belt; 15. Terminal; 161. First relay; 162. Second relay; 17. Second transfer wiring part; 18. Third transfer wiring part; 19. Relay fixing seat; 20. Double-layer bracket; 21. Pressing arm. Detailed implementation manners

[0039] To solve the problems in the background art, the core inventive concept of the present utility model is: during use, an environmental magnetic field is applied to the relay by the magnetic field generating part, and the anti-magnetic interference ability of the relay is detected by the relay detection device, so as to discover the relay and the fault modes and defects, and then provide guidance for the development of domestic relays in a targeted manner.

[0040] The following further describes the present utility model in detail with reference to embodiments.

[0041] Specific embodiments of the electromagnetic relay testing equipment provided by the present utility model:

[0042] As Figures 1-6 shown, the electromagnetic relay testing equipment includes a relay detection device 12 and a magnetic field generating device for electromagnetic relay testing; the magnetic field generating device for electromagnetic relay testing includes a frame 1, on which there are provided a relay mounting part for mounting at least one relay, a magnetic field generating part for generating an environmental magnetic field, and a detection device wiring part 8 for externally connecting the relay detection device 12. The relay mounting part is provided with a relay wiring part for electrically connecting with the relay, and the relay wiring part and the detection device wiring part 8 are electrically connected; the relay mounting part is located in the environmental magnetic field during use, and the relay detection device 12 is electrically connected with the relay wiring part. The relay detection device 12 is a prior art and will not be elaborated herein.

[0043] Specifically, for the convenience of conducting comparative experiments, as a specific implementation manner, as Figure 5 shown, the relay installation part is used to install the first relay 161 and the second relay 162 for conducting comparative experiments, so as to reduce the number of experiments. Among them, the first relay 161 is a domestic relay, and the second relay 162 is an imported relay; however, when conducting different tests, both the first relay 161 and the second relay 162 can also be domestic relays or both be imported relays.

[0044] But in other specific implementation manners, as Figure 6 shown, the relay installation part is used to install one relay, Figure 6 the first relay 161 shown in

[0045] is a domestic relay. By separately testing the domestic relay, the failure mode and defects of the domestic relay can be obtained; then, by separately testing the imported relay, the deficiencies of the domestic relay can be judged, so as to specifically propose the improvement direction for the domestic relay.

[0046] Specifically, as Figures 1-3 and shown in 5-6, when the relay detection board 10 is a detachable structure, at least one relay fixing seat 19 is provided on the relay detection board 10, and each relay fixing seat 19 constitutes a relay installation part; a set of terminal posts 15 are provided on each relay fixing seat 19, a second intermediate wiring part 17 and a third intermediate wiring part 18 are provided on the relay detection board 10, the relay is electrically connected to the corresponding terminal post 15 through a flexible wire, the terminal post 15 is electrically connected to the corresponding second intermediate wiring part 17 through a flexible wire, the second intermediate wiring part 17 and the third intermediate wiring part 18 are electrically connected, a first intermediate wiring part 11 is further provided on the frame 1, the first intermediate wiring part 11 is electrically connected to the third intermediate wiring part 18 through a flexible wire, and the first intermediate wiring part 11 is electrically connected to the detection device wiring part 8, so as to realize the electrical connection between the relay and the relay detection device 12.

[0047] But in other specific implementation manners, the relay fixing seat 19 can also be directly fixed on the frame 1.

[0048] When using the electromagnetic relay testing device in this embodiment, the relay can be installed on the relay installation part, and the magnetic field generating part can generate an ambient magnetic field. Since the relay installation part is located in the ambient magnetic field during use, the relay is in the ambient magnetic field during use. The anti-magnetic interference ability of the relay can be measured by an externally connected relay detection device 12, thereby providing guidance for the research and development of the relay.

[0049] Specifically, during the actual use of the relay, the ambient magnetic field where the relay is located is generally divided into two types: an alternating current (AC) ambient magnetic field and a direct current (DC) ambient magnetic field. The AC ambient magnetic field refers to the magnetic field generated by alternating current. The characteristic of the AC ambient magnetic field is that the magnetic field emitted by the magnetic field source constantly changes; the DC ambient magnetic field refers to the magnetic field generated by a permanent magnet or direct current. The characteristic of the DC ambient magnetic field is that the magnetic field emitted by the magnetic field source remains unchanged.

[0050] As Figures 1-2 shown in FIGS. 3 and 4, in order to be able to test the ability of the relay to resist the AC ambient magnetic field, as a specific implementation manner, the magnetic field generating part includes a coil 2 for passing alternating current, and an AC ambient magnetic field is generated through the coil 2, thereby testing the ability of the relay to resist the AC ambient magnetic field. Specifically, an AC power connection part 9 for externally connecting alternating current (such as mains electricity) is provided on the frame 1, so as to supply alternating current to the coil 2.

[0051] In the AC ambient magnetic field, the magnetic fields at different positions are different. In order to test the ability of the relay to resist the AC ambient magnetic field when the relative positions of the relay and the coil 2 (magnetic field source) are different, as a specific implementation manner, the coil 2 is a toroidal coil, and a rotating shaft 51 is connected to the coil 2. The rotation axis of the rotating shaft 51 extends horizontally, and a rotation power source for driving the rotating shaft 51 to drive the coil 2 to rotate is provided on the frame 1; the axis of the coil 2 is perpendicular to the rotation axis of the coil 2; the relay installation part is located inside the coil 2.

[0052] In order to simplify the structure and increase the angle that the coil 2 can rotate, as Figures 1-2 shown in FIGS. 3 and 4, a double-layer shaft 5 is provided on the frame. The double-layer shaft 5 includes an outer sleeve and a support shaft 52 located inside the outer sleeve. The outer sleeve constitutes the rotating shaft 51, and a bracket is fixedly connected to the support shaft 52. The relay installation part is arranged on the bracket, and the structure is simple; at the same time, when the coil 2 rotates, it will not interfere with the support shaft 52 and the bracket, ensuring that the coil 2 can rotate 180°.

[0053] Specifically, a coil driving motor 13 is installed on the frame 1. The coil driving motor 13 drives the rotating shaft 51 to rotate through a belt 14. A support shaft 52 is provided in the middle of the rotating shaft 51. The support shaft 52 and the rotating shaft 51 form a double-layer shaft 5. Among them, the rotating shaft 51 drives the coil 2 to rotate. A U-shaped bracket 7 located inside the coil 2 is fixedly connected to the support shaft 52. The relay installation part is arranged on the U-shaped bracket 7. The coil driving motor 13 is a rotating motor, and the coil driving motor 13 constitutes a rotational power source. Of course, in other specific embodiments, the rotational power source can also be a rotary oil cylinder or other structures.

[0054] In other specific embodiments, referring to Figures 1-2 and Figure 4 as shown, the bracket can also be fixedly mounted on the frame alone, and a separate rotation 51 is used to drive the coil 2 to rotate. At this time, it is necessary to avoid interference between the connection structure of the bracket and the frame and the coil 2, that is, it is necessary to limit the maximum rotation angle of the coil 2 (for example, an angle less than 180° such as 120°, 150°, etc.).

[0055] Since Figure 1 is a front view schematic diagram, so Figure 1 the direction perpendicular to the paper surface in

[0056] is the front-back direction. At this time, the axis of the coil 2 extends in the front-back direction. When the rotating shaft 51 drives the coil 2 to rotate 90°, the axis of the coil 2 extends in the up-down direction (vertical direction). After the coil 2 continues to rotate 90°, the axis of the coil 2 becomes extended in the front-back direction again. Therefore, the coil 2 only needs to rotate 180° to achieve detection at any angle between the coil 2 and the relay. Figures 1-2 As shown in

[0057] Specifically, as shown in Figures 1-2 a permanent magnet 31, a lower permanent magnet 34, a left permanent magnet 32, a right permanent magnet 33, a front permanent magnet 35, and a rear permanent magnet 36 are respectively provided in the six directions of the upper, lower, left, right, front, and rear of the relay installation part.

[0058] As shown in Figures 1-2 in order to simplify the structure, as a specific embodiment, the left permanent magnet 32 and the right permanent magnet 33 are arranged on the bracket (U-shaped bracket 7), and the structure is simple. However, in other specific embodiments, the left permanent magnet 32 and the right permanent magnet 33 can also be arranged on the coil 2.

[0059] As shown in Figures 1-2As shown in the figure, in order to conveniently test the anti-magnetic interference ability of the relay under different DC ambient magnetic fields, as a specific implementation manner, a telescopic hinge 4 is provided on one side of at least one permanent magnet away from the relay mounting portion, and the telescopic direction of the telescopic hinge 4 is the same as the arrangement direction of the permanent magnet and the relay mounting portion. After the telescopic hinge 4 extends to the set length, the corresponding permanent magnet is closer to the relay mounting portion, so as to be able to test the ability of the relay to resist the magnetic field interference generated by the corresponding permanent magnet; after the telescopic hinge 4 shortens to the set length, the corresponding permanent magnet is farther away from the relay mounting portion, so that the magnetic field generated by the corresponding permanent magnet can be ignored.

[0060] Specifically, as Figures 1-2 shown, telescopic hinges 4 are installed on the left permanent magnet 32, the right permanent magnet 33 and the upper permanent magnet 31. The relay detection board 10 is installed on the upper layer of the double-layer bracket 20. The front permanent magnet 35, the rear permanent magnet 36 and the lower permanent magnet 34 are detachably installed on the double-layer bracket 20, wherein the lower permanent magnet 34 is installed on the lower layer of the double-layer bracket 20. Of course, in other specific implementation manners, all the permanent magnets can also be detachably installed on the double-layer bracket 20, or all the permanent magnets are connected with telescopic hinges 4.

[0061] During use, the front permanent magnet 35, the rear permanent magnet 36 or the lower permanent magnet 34 can be installed separately, or the telescopic hinge 4 corresponding to the left permanent magnet 32, the right permanent magnet 33 or the upper permanent magnet 31 can be stretched separately, or any cooperation relationship (any two, any three, any four, any five or all six) can be formed among the upper permanent magnet 31, the lower permanent magnet 34, the left permanent magnet 32, the right permanent magnet 33, the front permanent magnet 35 and the rear permanent magnet 36, so as to test the anti-magnetic interference ability of the relay under different DC ambient magnetic fields.

[0062] As Figures 1-4 shown, in order to enable a set of electromagnetic relay test equipment to test the ability of the relay to resist AC ambient magnetic fields or DC ambient magnetic fields respectively, as a specific implementation manner, the magnetic field generating portion simultaneously includes a coil 2 for electrically connecting to alternating current and permanent magnets arranged on the periphery of the relay mounting portion, so that a set of electromagnetic relay test equipment can test the ability of the relay to resist AC ambient magnetic fields or DC ambient magnetic fields respectively.

[0063] As Figure 1 shown, in order to conveniently test the ability of the relay to resist a changing DC ambient magnetic field, as a specific implementation manner, at least one permanent magnet is arranged on the coil 2. When the coil 2 rotates, the permanent magnet rotates with the coil 2, and the DC ambient magnetic field changes, so as to be able to test the ability of the relay to resist the changing DC ambient magnetic field.

[0064] Specifically, as Figure 1As shown, the upper permanent magnet 31 is disposed on the coil 2. However, in other specific embodiments, the lower permanent magnet 34, the left permanent magnet 32, and the right permanent magnet 33 may also be disposed on the coil 2, and a telescopic hinge 4 is disposed between the coil 2 and the corresponding permanent magnet.

[0065] However, in other specific embodiments, the U-shaped bracket 7 may also be replaced with a square-shaped bracket, and the upper permanent magnet 31 is disposed on the square-shaped bracket. Specifically, the square-shaped bracket includes an upper plate, a lower plate, a left plate, and a right plate, and the upper permanent magnet 31 is disposed on the upper plate.

[0066] As Figures 1-2 shown, in order to conveniently test the ability of the relay to resist the ambient magnetic field changing in the horizontal plane, as a specific embodiment, a turntable and a rotary power source for driving the turntable to rotate are further installed on the frame 1, and the rotation axis of the turntable extends in the vertical direction; the relay mounting portion is located on the turntable. Specifically, the double-layer bracket 20 constitutes the turntable, and the rotary power source is a horizontal rotary motor 6. The turntable is fixed to the output end of the horizontal rotary motor 6. A pressing arm 21 for pressing the lower permanent magnet 34 is further provided on the horizontal rotary motor 6 to ensure that the lower permanent magnet 34 rotates together with the horizontal rotary motor 6. By horizontally rotating the relay mounted on the relay mounting portion, the ability of the relay to resist the ambient magnetic field changing in the horizontal plane can be conveniently tested. At the same time, compared with the scheme of horizontally rotating the coil 2 or all the permanent magnets, the structure is simple when the relay mounting portion rotates horizontally.

[0067] Of course, in other specific embodiments, the rotary power source may also be a rotary cylinder or the like; or, the turntable is a solid frustum, and corresponding permanent magnets are provided at the lower left, lower right, front lower, and rear lower positions of the relay mounting portion; or, the relay mounting portion is separately fixed on the frame 1, and the coil 2 and all the permanent magnets can rotate horizontally relative to the relay mounting portion. At this time, a horizontally arranged rotary cylinder is required to drive the axis of the coil 2 to change from the horizontal state to the vertical state, and at the same time, the rotary cylinder needs to be able to rotate horizontally with the relay mounting portion as the center.

[0068] During actual use Figures 1-6 When using the electromagnetic relay test equipment shown, different relay detection boards 10 can be selected according to actual needs, and the relay detection board 10 with a relay installed is installed on the double-layer bracket 20; then, according to actual needs, test the ability of the relay to resist the alternating current ambient magnetic field or the direct current ambient magnetic field. It should be specifically noted that, in order to ensure the accuracy of the experiment, the relay cannot be applied with both the alternating current ambient magnetic field and the direct current ambient magnetic field at the same time, and only one of the alternating current ambient magnetic field or the direct current ambient magnetic field can be applied to the relay.

[0069] When testing the ability of a relay to resist an alternating current ambient magnetic field, there are mainly the following four testing methods:

[0070] Method 1: Coil 2 does not rotate, and the horizontal rotating motor 6 does not rotate (i.e., the relay does not rotate);

[0071] Method 2: Coil 2 rotates driven by a rotating power source, and the horizontal rotating motor 6 does not rotate;

[0072] Method 3: Coil 2 does not rotate, and the horizontal rotating motor 6 rotates;

[0073] Method 4: Coil 2 rotates driven by a rotating power source, and the horizontal rotating motor 6 rotates.

[0074] It should be noted that in the above tests, it is necessary to ensure that the permanent magnet is far from the relay (i.e., the telescopic hinge 4 is shortened to a set length), or ensure that the permanent magnet is removed from the device.

[0075] When testing the ability of a relay to resist a direct current ambient magnetic field, there are mainly the following four testing methods:

[0076] Method 1: Coil 2 does not rotate, and the horizontal rotating motor 6 does not rotate (i.e., the relay does not rotate);

[0077] Method 2: Coil 2 rotates driven by a rotating power source, and the horizontal rotating motor 6 does not rotate;

[0078] Method 3: Coil 2 does not rotate, and the horizontal rotating motor 6 rotates;

[0079] Method 4: Coil 2 rotates driven by a rotating power source, and the horizontal rotating motor 6 rotates.

[0080] It should be noted that in the above tests, it is necessary to ensure that coil 2 is not energized (i.e., ensure that the alternating current connection part 9 is not connected to an external power source). At the same time, in the above tests, different permanent magnets can be arbitrarily combined and matched.

[0081] It should be specifically noted that in this embodiment, except for coil 2 and the permanent magnet, all structures close to the relay installation part are made of non-ferromagnetic materials to avoid the interference magnetic field generated by the structures close to the relay installation part.

[0082] Specific embodiments of the magnetic field generating device for testing electromagnetic relays provided by the present utility model:

[0083] The specific structure of the magnetic field generating device for testing electromagnetic relays in this embodiment is the same as that of the magnetic field generating device for testing electromagnetic relays in the embodiment of the electromagnetic relay testing equipment of the present utility model, and will not be described in detail here.

[0084] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions recorded in the foregoing embodiments without creative efforts, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A magnetic field generating device for electromagnetic relay testing, characterized in that, It includes a frame, on which there are a relay mounting part for mounting at least one relay, a magnetic field generating part for generating an ambient magnetic field, and a detection device wiring part for externally connecting a relay detection device. The relay mounting part is provided with a relay wiring part for electrically connecting with the relay, and the relay wiring part and the detection device wiring part are electrically connected; the relay mounting part is located in the ambient magnetic field during use.

2. The magnetic field generating device for electromagnetic relay testing according to claim 1, wherein The magnetic field generating part includes a coil for passing an alternating current.

3. The magnetic field generating device for electromagnetic relay testing according to claim 2, wherein The coil is a toroidal coil, and a rotating shaft is connected to the coil. The rotation axis of the rotating shaft extends horizontally. The frame is provided with a rotating power source for driving the rotating shaft to drive the coil to rotate; the axis of the coil is perpendicular to the rotation axis of the coil; the relay mounting part is located inside the coil.

4. The magnetic field generating device for electromagnetic relay testing according to claim 1, characterized in that, The magnetic field generating part includes at least one permanent magnet arranged on the periphery of the relay mounting part.

5. The magnetic field generating device for electromagnetic relay testing according to claim 4, wherein, On the side of at least one permanent magnet away from the relay mounting part, there is a telescopic hinge, and the telescopic direction of the telescopic hinge is the same as the arrangement direction of the permanent magnet and the relay mounting part.

6. The magnetic field generating device for electromagnetic relay testing according to claim 3, wherein, The magnetic field generating part further includes at least one permanent magnet arranged on the periphery of the relay mounting part, and at least one permanent magnet is arranged on the coil.

7. The magnetic field generating device for electromagnetic relay testing according to claim 6, wherein The frame is provided with a double-layer shaft, which includes an outer sleeve and a support shaft located inside the outer sleeve. The outer sleeve constitutes the rotating shaft, and a bracket is fixedly connected to the support shaft. The relay mounting part is arranged on the bracket.

8. The magnetic field generating device for electromagnetic relay testing according to any one of claims 1-7, characterized in that, The relay mounting part is used for mounting at least two different relays for conducting a comparative experiment.

9. The magnetic field generating device for electromagnetic relay testing according to any one of claims 1-7, characterized in that, The frame is further installed with a turntable and a rotating power source for driving the turntable to rotate. The rotation axis of the turntable extends in the vertical direction; the relay mounting part is located on the turntable.

10. An electromagnetic relay testing device, comprising a relay detection device, characterized in that, It further includes a magnetic field generating device for electromagnetic relay testing according to any one of claims 1-9; the relay detection device is electrically connected to the relay wiring part.

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