Electromagnetic device

Abstract

The application relates to the field of low-voltage electrical apparatus, in particular to an electromagnetic device which comprises a coil assembly, a static iron core arranged in the middle of the coil assembly, a dynamic iron core assembly, springs which are respectively limitedly matched with the static iron core and the dynamic iron core assembly at two ends, wherein the two ends of the dynamic iron core assembly are respectively a dynamic iron core detection end and a dynamic iron core driving end; the electromagnetic device further comprises a detection structure which is non-contact matched with the dynamic iron core detection end; when the dynamic iron core assembly is located at an initial position, the detection structure outputs a first signal; when the dynamic iron core assembly moves to an action position after action, the dynamic iron core detection end moves relative to the detection structure, and the detection structure outputs a second signal; the electromagnetic device can realize real-time detection of the position of the dynamic iron core assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of low-voltage electrical apparatus, in particular to an electromagnetic device. BACKGROUND

[0002] The split excitation release and the under voltage release are both important control components of the circuit breaker; the split excitation release can realize the remote tripping function of the circuit breaker, and the under voltage release can realize the voltage protection and drive the circuit breaker to break the circuit when the system voltage is under voltage.

[0003] The service life is an important parameter of the split excitation release and the under voltage release, according to the technical requirements related to the Internet of Things, the current service life and the remaining number of times of use of the circuit breaker accessories (including the under voltage, the split excitation release and the closing electromagnet) need to be recorded and fed back in real time; however, the existing split excitation release and under voltage release cannot meet the above requirements. SUMMARY

[0004] The purpose of the present application is to overcome the defects of the prior art, and provide an electromagnetic device, which can detect the position of the moving iron core assembly in real time.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] An electromagnetic device comprises a coil assembly 3, a static iron core 6 and a moving iron core assembly 2 arranged in the middle of the coil assembly 3, and springs 5 arranged at both ends of the static iron core 6 and the moving iron core assembly 2 for limiting cooperation; the moving iron core assembly 2 comprises a moving iron core detection end and a moving iron core driving end at both ends; the electromagnetic device further comprises a detection structure 9 in non-contact cooperation with the moving iron core detection end.

[0007] When the moving iron core assembly 2 is in the initial position, the detection structure 9 outputs a first signal; when the moving iron core assembly 2 moves to the action position after action, the moving iron core detection end moves relative to the detection structure 9, and the detection structure 9 outputs a second signal.

[0008] Preferably, when the moving iron core assembly 2 is in the initial position, the moving iron core detection end is opposite to the detection structure 9; when the moving iron core assembly 2 moves to the action position after action, the moving iron core detection end moves to one side of the detection structure 9.

[0009] Preferably, when the moving iron core assembly 2 is in the initial position, the length of the part of the moving iron core detection end protruding on one side of the detection structure 9 is L0; the air gap length between the moving iron core assembly 2 and the static iron core 6 is L1; L0≤L1.

[0010] When the moving iron core assembly 2 is in the action position, the moving iron core detection end is located on the other side of the detection structure 9.

[0011] Preferably, the detection structure 9 is a photoelectric switch; when the moving iron core assembly 2 is in the initial position, the moving iron core detection end is opposite to the photoelectric switch, and the photoelectric switch is off or on; when the moving iron core assembly 2 moves to the action position after action, the moving iron core detection end moves to the side of the photoelectric switch, and the photoelectric switch is on or off.

[0012] Preferably, the detection structure 9 is a magnetic sensitive element; when the moving iron core assembly 2 moves from the initial position to the action position, the magnetic field intensity of the environment where the magnetic sensitive element is located changes.

[0013] Preferably, the magnetic sensitive element is a Hall element.

[0014] Preferably, the electromagnetic device further comprises a circuit board 7, and the detection structure 9 is connected with the circuit board 7.

[0015] Preferably, the circuit board 7 comprises a circuit board first part 70 arranged on the radial side of the coil assembly 3, and the coil assembly 3 further comprises a splicing pin 8 which is inserted and matched with the circuit board first part 70.

[0016] Preferably, the electromagnetic device further comprises a shell 1, and the coil assembly 3 and the circuit board 7 are respectively fixedly arranged in the shell 1; the circuit board 7 comprises a circuit board first part 70 and a circuit board second part 71; the circuit board first part 70 is arranged on the radial side of the coil assembly 3; the circuit board second part 71 is arranged on the outer side of one end of the coil assembly 3, and is provided with a circuit board opening 710 through which the moving iron core detection end passes; the detection structure 9 is arranged on the circuit board second part 71 and located on the outer peripheral side wall of the circuit board opening 710; the detection structure 9 and the coil assembly 3 are respectively located on both sides of the circuit board second part 71.

[0017] Preferably, the electromagnetic device is a separate release; when the moving iron core assembly 2 is in the initial position, the spring 5 is relaxed, and the moving iron core assembly 2 is separated from the static iron core 6; when the moving iron core assembly 2 is in the action position, the spring 5 is compressed, and the moving iron core assembly 2 is attracted to the static iron core 6.

[0018] Preferably, the moving iron core assembly 2 comprises a moving iron core 20 and a top rod 21 which synchronously act; one end of the moving iron core 20 is the moving iron core detection end, the other end is connected with one end of the top rod 21, and the other end of the top rod 21 passes through the static iron core 6 to serve as the moving iron core driving end; the spring 5 is sleeved on the top rod 21, and the two ends are respectively limitedly matched with the moving iron core assembly 2 and the static iron core 6.

[0019] Preferably, the moving iron core assembly 2 comprises a moving iron core 20 and a top rod 21 which synchronously act; one end of the top rod 21 passes through the moving iron core 20 to serve as the moving iron core detection end, and the other end of the top rod 21 passes through the static iron core 6 to serve as the moving iron core driving end; the spring 5 is sleeved on the top rod 21, and the two ends are respectively limitedly matched with the moving iron core assembly 2 and the static iron core 6.

[0020] Preferably, the electromagnetic device is an under-voltage release; when the moving iron core assembly 2 is in the initial position, the spring 5 is compressed, and the moving iron core assembly 2 is attracted to the static iron core 6; when the moving iron core assembly 2 is in the action position, the spring 5 is relaxed, and the moving iron core assembly 2 is separated from the static iron core 6.

[0021] Preferably, the moving iron core assembly 2 comprises a synchronous moving iron core 20 and a guide rod 21a, one end of the moving iron core 20 serves as a moving iron core driving end, the other end is connected to one end of the guide rod 21a, and the other end of the guide rod 21a passes through the static iron core 6 and serves as a moving iron core detection end; the spring 5 is sleeved on the guide rod 21a, and the two ends are respectively limitedly matched with the moving iron core assembly 2 and the static iron core 6.

[0022] The electromagnetic device of the present application has a detection structure 9, which can respectively output first and second signals when the moving iron core assembly 2 is respectively in the initial position and the action position, so as to realize indication and counting of the position of the moving iron core assembly 2, and facilitate the user to master the working state and the remaining service life of the electromagnetic device in real time. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic view of the first embodiment of the electromagnetic device of the present application, the electromagnetic device is a separate release, and the moving iron core assembly and the static iron core are in a separated state;

[0024] Figure 2 is a three-dimensional structural schematic view of the first embodiment of the electromagnetic device of the present application;

[0025] Figure 3 is an assembly structural schematic view of the line board, the detection structure and the detection mechanism mounting plate of the present application;

[0026] Figure 4 is a structural schematic view of the moving iron core of the first embodiment of the electromagnetic device of the present application;

[0027] Figure 5 is a structural schematic view of the first embodiment of the electromagnetic device of the present application, the moving iron core assembly and the static iron core are in an attracted state;

[0028] Figure 6 is a structural schematic view of the second embodiment of the electromagnetic device of the present application, the electromagnetic device is a separate release, and the moving iron core assembly and the static iron core are in a separated state;

[0029] Figure 7 is a structural schematic view of the moving iron core of the second embodiment of the electromagnetic device of the present application;

[0030] Figure 8 is a structural schematic view of the top rod of the second embodiment of the electromagnetic device of the present application;

[0031] Figure 9 This is a schematic diagram of the structure of the second embodiment of the electromagnetic device of the present invention, in which the moving iron core assembly and the stationary iron core are in an attracted state;

[0032] Figure 10 This is a schematic diagram of the structure of the third embodiment of the electromagnetic device of the present invention. The electromagnetic device is an undervoltage release device, and the moving iron core assembly and the stationary iron core are in the attracted state.

[0033] Figure 11 This is a schematic diagram of the guide rod structure of the third embodiment of the electromagnetic device of the present invention;

[0034] Figure 12 This is a schematic diagram of the static iron core of the third embodiment of the electromagnetic device of the present invention;

[0035] Figure 13 This is a structural schematic diagram of the third embodiment of the electromagnetic device of the present invention, in which the moving iron core assembly and the stationary iron core are in a separated state. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1-13 The given embodiments further illustrate specific implementations of the electromagnetic device of the present invention. The electromagnetic device of the present invention is not limited to the descriptions of the following embodiments.

[0037] The electromagnetic device of the present invention includes a coil assembly 3 and a stationary iron core 6, a moving iron core assembly 2, and springs 5 ​​respectively disposed in the middle of the coil assembly 3, which are respectively limited and engaged with the stationary iron core 6 and the moving iron core assembly 2 at both ends; the moving iron core assembly 2 has a moving iron core detection end and a moving iron core driving end at both ends; the electromagnetic device also includes a detection structure 9 that engages with the moving iron core detection end in a non-contact manner; when the moving iron core assembly 2 is in the initial position, the detection structure 9 outputs a first signal; after the moving iron core assembly 2 moves to the operating position, causing the moving iron core detection end to move relative to the detection structure 9, the detection structure 9 outputs a second signal.

[0038] The electromagnetic device of the present invention has a detection structure 9 that can output a first signal and a second signal respectively when the moving iron core assembly 2 is in the initial position and the operating position, thereby realizing the indication and counting of the position of the moving iron core assembly 2, which makes it convenient for users to grasp the working status and remaining service life of the electromagnetic device in real time.

[0039] Preferred, such as Figure 1 , 6 As shown in Figures 1 and 10, when the moving iron core assembly 2 is in its initial position, the moving iron core detection end is opposite to the detection structure 9; as shown in Figure 10. Figure 5 , 9 As shown in Figure 13, when the moving iron core assembly 2 moves to the operating position after its operation, the moving iron core detection end moves to one side of the detection structure 9. Further, as... Figure 1、 6 As shown in Figs. 10 and 13, when the moving iron core assembly 2 is in the initial position, the length of the part of the moving iron core detection end protruding to one side of the detection structure 9 is L0; the air gap length between the moving iron core assembly 2 and the static iron core 6 is L1; L0≤L1. Further, as shown in Figs. 10 and 13, when the moving iron core assembly 2 is in the action position, the moving iron core detection end is located at the other side of the detection structure 9. The above structure can ensure that the detection structure 9 outputs different signals when the moving iron core assembly 2 is in the initial position and the action position. Figure 1 6

[0040] Preferably, the detection structure 9 is a photoelectric switch; when the moving iron core assembly 2 is in the initial position, the moving iron core detection end is opposite to the photoelectric switch, and the photoelectric switch is off or on; when the moving iron core assembly 2 moves to the action position after action, the moving iron core detection end moves to one side of the photoelectric switch, and the photoelectric switch is on or off. The change of the relative position between the moving iron core assembly 2 and the detection structure 9 makes the detection structure 9 switch between the on and off states, and the first signal and the second signal correspond to the off and on states, thereby realizing the indication of the position of the moving iron core assembly 2.

[0041] Preferably, the detection structure 9 is a magnetic sensitive element; when the moving iron core assembly 2 moves from the initial position to the action position, the magnetic field intensity of the environment where the magnetic sensitive element is located changes. Further, the detection structure 9 is a Hall element. The change of the relative position between the moving iron core assembly 2 and the detection structure 9 causes the change of the magnetic field intensity of the environment where the magnetic sensitive element is located, and then the signal intensity or value output by the magnetic sensitive element also changes correspondingly. Once the absolute value of the difference between the first signal and the second signal exceeds a set threshold value, it is judged that the moving iron core assembly 2 moves from the initial position to the action position, thereby realizing the indication of the position of the moving iron core assembly 2.

[0042] Preferably, as shown in Figs. 6, 9, 10 and 13, the electromagnetic device further comprises a circuit board 7, and the detection structure 9 is connected to the circuit board 7. Figure 1 5

[0043] The electromagnetic device of the present application will be further described below in combination with the drawings and specific embodiments.

[0044] As shown in Figs. 6, 9, 10 and 13, the electromagnetic device further comprises a circuit board 7, and the detection structure 9 is connected to the circuit board 7. Figure 1 5 ​​​​​, 6, 9, 10, 13, the electromagnetic device of the application, which comprises a coil assembly 3, a static core 6, a moving core assembly 2 and a spring 5 arranged at both ends of the static core 6 and the moving core assembly 2 respectively, and a detection structure 9 arranged in the middle of the coil assembly 3; the moving core assembly 2 has a moving core detection end and a moving core driving end at both ends, and the moving core detection end is in non-contact cooperation with the detection structure 9; when the moving core assembly 2 is in an initial position, the detection structure 9 outputs a first signal; when the moving core assembly 2 moves to an action position after action, the moving core detection end moves relative to the detection structure 9, and the detection structure 9 outputs a second signal. Further, as shown in Figure 1 、 5 、6, 9, 10, 13, when the moving core assembly 2 is in the initial position, the moving core detection end is opposite to the detection structure 9; when the moving core assembly 2 moves to the action position after action, the moving core detection end moves to one side of the detection structure 9. Further, as shown in Figure 1 、 5 、6, 9, 10, 13, when the moving core detection end is opposite to the detection structure 9, the connecting line of the two is perpendicular to the moving direction of the moving core assembly 2.

[0045] Preferably, as shown in Figure 1 、 6 、10 and 13, when the moving core assembly 2 is in the initial position, the length of the part of the moving core detection end protruding on one side of the detection structure 9 is L0; the air gap length between the moving core assembly 2 and the static core 6 is L1; L0≤L1. Further, as shown in Figure 1 、 6 、10 and 13, when the moving core assembly 2 is in the action position, the moving core detection end is located on the other side of the detection structure 9.

[0046] Specifically, as shown in the direction of Figure 5 、 6 、10, when the moving core assembly 2 is in the initial position, the moving core detection end is opposite to the detection structure 9 in the horizontal direction; as shown in Figure 1 、 9 、13, after the moving core assembly 2 acts and moves vertically downward, the moving core detection end moves to below the detection structure 9. Further, as shown in Figure 1 、 6 、10 and 13, when the moving core assembly 2 is in the initial position, the length of the part of the moving core detection end protruding on the upper side of the detection structure 9 is L0; the air gap length between the moving core assembly 2 and the static core 6 is L1; L0≤L1.

[0047] The detection structure 9 can be realized in various ways, and the electromagnetic device of the application preferably adopts the following two ways:

[0048] Manner one: as Figure 1 , 5 , 6, 9, 10, 13, the detection structure 9 is a photoelectric switch; when the moving iron core assembly 2 is located at the initial position, the moving iron core detection end is opposite to the photoelectric switch, the photoelectric switch is off or on; when the moving iron core assembly 2 moves to the action position after action, the moving iron core detection end moves to the side of the photoelectric switch, the photoelectric switch is on or off.

[0049] Specifically, as Figure 1 , 5 , 6, 9, 10, 13, the detection structure 9 includes two oppositely arranged photoelectric switches; when the moving iron core assembly 2 is located at the initial position, the moving iron core detection end is inserted between the two photoelectric switches, the photoelectric switch is off and does not output signal, or it can be said that the first signal is output; when the moving iron core assembly 2 moves to the action position after action, the photoelectric switch is on and outputs the signal, that is, the second signal is output. It should be pointed out that when the detection structure 9 is a photoelectric switch, the specific number of photoelectric switches is determined by its type, which is a routine technical means for those skilled in the art, and will not be repeated here.

[0050] Manner two: the detection structure 9 is a magnetic sensitive element; after the moving iron core assembly 2 moves from the initial position to the action position, the magnetic field strength of the environment where the magnetic sensitive element is located changes. Further, the detection structure 9 is a Hall element.

[0051] Specifically, the detection structure 9 is a Hall voltage sensor, and after the moving iron core assembly 2 moves from the initial position to the action position, the magnetic field strength of the environment where the Hall voltage sensor is located changes significantly, thereby causing the induced electromotive force of the Hall voltage sensor to also change significantly, that is, reflecting the position change of the moving iron core assembly 2 and the change of the working state of the electromagnetic device. Of course, the detection structure 9 can also be a Hall current sensor, and after the moving iron core assembly 2 moves from the initial position to the action position, the induced current of the Hall current sensor also changes significantly, that is, reflecting the position change of the moving iron core assembly 2 and the change of the working state of the electromagnetic device.

[0052] Preferably, as Figure 1 , 5 , 6, 9, 10, 13, the electromagnetic device of the application further comprises a circuit board 7, and the detection structure 9 is connected with the circuit board 7 to transmit the first signal and the second signal to the circuit board 7. Further, the electromagnetic coil of the coil assembly 3 is also connected with the circuit board 7 to obtain working power supply.

[0053] Preferably, as Figure 1 , 5The circuit board 7 includes a first circuit board part 70, which is arranged on the radial side of the coil assembly 3, and the coil assembly 3 further includes a splicing needle 8 which is plugged with the circuit board 7. Further, the detection structure 9 and the electromagnetic coil of the coil assembly 3 are connected with the circuit board 7 through the splicing needle 8 respectively.

[0054] Specifically, as shown by the arrows in Figure 1 、 5 The first circuit board part 70 is arranged on the left side of the coil assembly 3, the extension direction of the splicing needle 8 is perpendicular to the axial direction of the coil assembly 3, one end of the splicing needle 8 is connected with the coil assembly 3, and the other end is plugged with the first circuit board part 70.

[0055] Preferably, as shown by the arrows in Figures 1-3 、 5 The electromagnetic device further includes a housing 1, the coil assembly 3 and the circuit board 7 are fixedly arranged on the housing 1 respectively, the circuit board 7 further includes a second circuit board part 71, which is arranged on the outer side of one end of the coil assembly 3; the detection structure 9 is arranged on the second circuit board part 71, and the detection structure 9 and the coil assembly 3 are located on the two sides of the second circuit board part 71 respectively. Figure 1 Further, as shown by the arrows in The second circuit board part 71 is provided with a circuit board opening 710 through which the moving iron core detection end passes; and the detection structure 9 is arranged on the second circuit board part 71 and located on the outer circumferential side wall of the circuit board opening 710.

[0056] Preferably, as shown by the arrows in Figure 1 、 5 When the moving iron core assembly 2 is in the action position, the moving iron core detection end and the detection structure 9 are located on the two sides of the second circuit board part 71 respectively.

[0057] Specifically, as shown by the arrows in Figure 1 、 5 The circuit board 7 is arranged on the left side of the coil assembly 3, the second circuit board part 71 is arranged on the upper side of the upper end of the coil assembly 3, the detection structure 9 is arranged on the upper side of the second circuit board part 71, and when the moving iron core assembly 2 is in the action position, the moving iron core detection end and the detection structure 9 are located on the lower side and the upper side of the second circuit board part 71 respectively.

[0058] Preferably, as shown by the arrows in Figures 1-5 、 5, 6, 9, 10, 13, the coil assembly 3 is an embodiment: the coil assembly 3 comprises coil skeleton 30 and the first electromagnetic coil 31, the second electromagnetic coil 32 which is respectively set outside two ends of coil skeleton 30;The first electromagnetic coil 31 and the second electromagnetic coil 32 are in series;The middle part of the coil skeleton 30 is provided with a skeleton mounting cavity extending along its axial direction.Further, one end of the assembling needle 8 is fixedly arranged on the coil skeleton 30.

[0059] As shown in Figures 1-5 , it is the first embodiment of the electromagnetic device of the application.

[0060] As shown in Figure 1 , the electromagnetic device of the first embodiment is a split excitation release;As shown in Figure 5 , when the moving iron core assembly 2 is located at the initial position, the spring 5 is relaxed, and the moving iron core assembly 2 is separated from the static iron core 6;As shown in Figure 1 , when the moving iron core assembly 2 is located at the action position, the spring 5 is compressed, and the moving iron core assembly 2 is attracted to the static iron core 6.

[0061] Preferably, as shown in Figure 1 and 5 , the moving iron core assembly comprises a synchronous moving iron core 20 and a top rod 21, one end of the moving iron core 20 is a moving iron core detection end, the other end is connected with one end of the top rod 21, the other end of the top rod 21 passes through the static iron core 6 as a moving iron core driving end;The spring 5 is sleeved on the top rod 21, and the two ends are limited to cooperate with the moving iron core assembly 2 and the static iron core 6 respectively.

[0062] Preferably, as shown in Figure 1 and 5 , the static iron core 6 is arranged at one end of the skeleton mounting cavity of the coil assembly 3, and the moving iron core 20 is slidably arranged at the other end of the skeleton mounting cavity.Further, as shown in Figure 1 and 5 , the electromagnetic device of the application further comprises a moving iron core guide limiting piece 40 coaxially arranged with the moving iron core assembly 2, the moving iron core guide limiting piece 40 is located between the moving iron core assembly 2 and the coil skeleton 30, and the inner diameter of the moving iron core guide limiting piece 40 matches the outer diameter of the moving iron core 20.

[0063] Specifically, as shown in the direction of Figure 1 and 5 , the static iron core 6 is fixedly arranged at the lower end of the skeleton mounting cavity, and the moving iron core 20 is slidably arranged at the upper end of the skeleton mounting cavity;The upper end of the moving iron core 20 is a moving iron core detection end, and the lower end is connected with the upper end of the top rod 21, and the lower end of the top rod 21 passes through the static iron core 6 as a moving iron core driving end;The moving iron core guide limiting piece 40 is arranged at the upper end of the skeleton mounting cavity and located between the moving iron core 20 and the coil skeleton 30.

[0064] Preferably, asFigures 6-9 and 4 As shown in FIG. 1, a first embodiment of the electromagnetic device is shown: the electromagnetic device comprises a moving iron core assembly 2 and a static iron core 6; the moving iron core assembly 2 comprises a moving iron core 20 and a top rod 21; the moving iron core 20 comprises a first cylindrical part 201, a second cylindrical part 202 and a third cylindrical part 203 arranged coaxially in sequence, the outer diameters of the three parts decrease in sequence, a top rod assembly groove is arranged in the middle of the first cylindrical part 201 and matched with the top rod 21, the outer diameter of the second cylindrical part 202 is matched with the inner diameter of a moving iron core guide limiting part 40, and the third cylindrical part 203 serves as a moving iron core detection end; the top rod 21 comprises a top rod first part 210 and a top rod second part 211 arranged coaxially in sequence, the outer diameter of the top rod first part 210 is greater than that of the top rod second part 211, the top rod first part 210 is matched with the top rod assembly groove, and one end of the top rod second part 211 is connected with the top rod first part 210 and the other end passes through the static iron core 6 and serves as a moving iron core driving end.

[0065] Preferably, as shown in FIG. 1, the static iron core 6 is further provided with a static iron core spring limiting groove and a static iron core perforation through which the top rod 21 passes, the static iron core spring limiting groove and the static iron core perforation are arranged coaxially in sequence, and the inner diameter of the former is greater than that of the latter; the spring 5 is sleeved on the top rod second part and the two ends are respectively matched with the top rod first part and the static iron core spring limiting groove. Figures 6-8

[0066] It should be pointed out that the electromagnetic device of the embodiment is used as a split excitation release device and is mostly used in circuit breakers, after receiving a split signal, the moving iron core driving end drives the operation mechanism of the circuit breaker to drive the circuit breaker to split or trip.

[0067] As shown in FIG. 2, a second embodiment of the electromagnetic device is shown. Figure 6

[0068] The electromagnetic device of the second embodiment is a split excitation release device, and the difference from the first embodiment is that one end of the top rod 21 passes through the moving iron core 20 and serves as a moving iron core detection end, and the other end of the top rod 21 passes through the static iron core 6 and serves as a moving iron core driving end.

[0069] Preferably, as shown in FIG. 2, a second embodiment of the moving iron core assembly 2 is shown: the moving iron core assembly 2 comprises a moving iron core 20 and a top rod 21; as shown in FIG. 2, the moving iron core 20 comprises a first cylindrical part 201 and a second cylindrical part 202 arranged coaxially in sequence, the outer diameter of the first cylindrical part 201 is greater than that of the second cylindrical part 202, a top rod assembly groove and a moving iron core top rod perforation are arranged in the middle of the moving iron core 20 in sequence and are connected in sequence, the inner diameter of the top rod assembly groove is greater than that of the moving iron core top rod perforation; as shown in FIG. 2, the top rod 21 comprises a top rod first part 210 and a top rod second part 211 arranged coaxially in sequence, the outer diameter of the top rod first part 210 is greater than that of the top rod second part 211, the top rod first part 210 is matched with the top rod assembly groove, and one end of the top rod second part 211 is connected with the top rod first part 210 and the other end passes through the static iron core 6 and serves as a moving iron core driving end. Figure 6 Figures 10-13 and 7 Figures 10-13 and 8 ​​​​As shown, the ejector rod 21 comprises coaxially arranged ejector rod first part 210, ejector rod second part 211 and ejector rod third part 212, the two ends of the ejector rod first part 210 are connected with the ejector rod second part 211 and the ejector rod third part 212 respectively, the outer diameter of the ejector rod first part 210 is greater than the outer diameter of the ejector rod second part 211 and the outer diameter of the ejector rod third part 212, the ejector rod first part 210 is matched with the ejector rod assembly groove, the ejector rod second part 211 passes through the static iron core 6 as the moving iron core driving end, and the ejector rod third part 212 passes through the moving iron core ejector rod perforation as the moving iron core detection end.

[0070] As shown in the drawings, Figure 10 the third embodiment of the electromagnetic device of the present application is shown.

[0071] As shown in the drawings, Figure 13 the electromagnetic device of the third embodiment is an under-voltage release; as shown in the drawings, Figure 13 when the moving iron core assembly 2 is in the initial position, the spring 5 is compressed, and the moving iron core assembly 2 and the static iron core 6 are attracted; as shown in the drawings, Figure 10 when the moving iron core assembly 2 is in the action position, the spring 5 is relaxed, and the moving iron core assembly 2 is separated from the static iron core 6. As shown in the drawings, Figure 10 when the electromagnetic device of the present application is an under-voltage release, the under-voltage release is in a normal working state, the electromagnetic coil 3 is continuously energized, the magnetic field of the electromagnetic coil 3 causes the moving iron core assembly 2 to be in the initial position and the static iron core 6 to be attracted, when the under-voltage release is in a non-normal working state (i.e. the under-voltage release is in a non-normal working state), the magnetic field of the electromagnetic coil 3 is weakened or disappears, which is not enough to maintain the moving iron core assembly 2 and the static iron core 6 to be attracted, then the spring 5 is relaxed, and the moving iron core assembly 2 is pushed to the action position to separate it from the static iron core 6.

[0072] Preferably, as shown in the drawings, Figure 10 and 13 the moving iron core assembly 2 comprises a synchronous moving moving iron core 20 and a guide rod 21a, one end of the moving iron core 20 is connected with one end of the guide rod 21a as the moving iron core driving end, the other end of the guide rod 21a passes through the static iron core 6 as the moving iron core detection end; the spring 5 is sleeved on the guide rod 21a, and the two ends are respectively limited matched with the moving iron core assembly 2 and the static iron core 6.

[0073] Preferably, as shown in the drawings, Figure 10 and 13 the static iron core 6 is arranged at one end of the frame mounting cavity, and the moving iron core 20 is slidably arranged at the other end of the frame mounting cavity. Further, as shown in the drawings, Figure 10 and 13As shown, the electromagnetic device further comprises a moving iron core guide limiting member 40 coaxially arranged with the moving iron core assembly 2, which is located between the moving iron core assembly 2 and the coil framework 30, and the inner diameter of the moving iron core guide limiting member 40 matches the outer diameter of the moving iron core 20.

[0074] Specifically, as shown by the direction of Figure 10 and 13 , the static iron core 6 is arranged at the upper end of the framework mounting cavity, and the moving iron core 20 is slidingly arranged at the lower end of the framework mounting cavity; the lower end of the moving iron core 20 serves as a moving iron core driving end and is connected with the lower end of the guide rod 21a, and the upper end of the guide rod 21a passes through the static iron core 6 and serves as a moving iron core detection end. The moving iron core guide limiting member 40 is arranged at the lower end of the framework mounting cavity and located between the moving iron core 20 and the coil framework 30.

[0075] Preferably, as shown by the direction of Figure 12 and 11 , it is the third embodiment of the moving iron core assembly 2: the moving iron core assembly 2 comprises a moving iron core 20 and a guide rod 21a; the moving iron core 20 comprises a moving iron core first part, a moving iron core second part and a moving iron core third part arranged coaxially in sequence, the outer diameters of the three parts decrease in sequence, the outer diameter of the moving iron core second part matches the inner diameter of the moving iron core guide limiting member 40, the moving iron core third part serves as a moving iron core driving end, and the moving iron core 20 further comprises a guide rod mounting groove at the middle of one end, which comprises a mounting groove first part and a mounting groove second part arranged coaxially, one end of the mounting groove first part is for inserting the guide rod 21a, and the other end is connected with the mounting groove second part, the inner diameter of the mounting groove first part is larger than that of the mounting groove second part; the guide rod 21a comprises a guide rod first part 210a and a guide rod second part 213a and a guide rod third part 214a connected with both ends of the guide rod first part 210a respectively, the outer diameter of the guide rod first part 210a is larger than that of the guide rod second part 213a and the guide rod third part 214a, the outer diameter of the guide rod first part 210a matches the inner diameter of the mounting groove first part, the outer diameter of the guide rod second part 213a matches the inner diameter of the mounting groove second part, and the free end of the guide rod third part 214a passes through the static iron core 6 and serves as a moving iron core driving end.

[0076] Preferably, as shown by the direction of Figure 10 and 12 , it is an embodiment of the static iron core 6: the static iron core 6 comprises a static iron core main body 60, a static iron core flange 61 arranged at one end of the static iron core main body 60, and a static iron core annular limiting platform 62 arranged at one side of the static iron core flange 61, the static iron core annular limiting platform 62 and the static iron core main body 60 are located at both sides of the static iron core flange 61 respectively; the static iron core annular limiting platform 62 is inserted into the static iron core limiting hole of the shell 1, and the static iron core flange 61 is limited between the shell 1 and the coil framework 30. Further, as shown by the direction of​ As shown in the figure, the static iron core 6 is provided with a first hole segment 63 and a second hole segment 64 coaxially arranged in the middle part, the outer diameter of the first hole segment 63 is smaller than that of the second hole segment 64, and the connecting part of the first hole segment 63 and the second hole segment 64 forms a spring limiting step 63-64.

[0077] Preferably, as shown in the figure, ​ and 13 The spring 5 is sleeved on the third part 214a of the guide rod, and the two ends are respectively limited by the spring limiting step 63-64 and the first part 210a of the guide rod.

[0078] It should be pointed out that the electromagnetic device of the present application is usually applied to circuit breakers as an under-voltage release. When the circuit in which the under-voltage release is located is under-voltage or the under-voltage release is faulty, the moving iron core 20 is released by the static iron core 6, the spring 5 pushes the moving iron core 20 to move, and the driving end of the moving iron core cooperates with the operating mechanism of the circuit breaker to drive the circuit breaker to open or trip.

[0079] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application should not be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be regarded as falling within the protection scope of the present application.

Claims

1. An electromagnetic device comprising a coil assembly (3) and a static core (6) and a moving core assembly (2) respectively arranged in the middle of the coil assembly (3), springs (5) respectively arranged in limiting cooperation with the static core (6) and the moving core assembly (2) at both ends; characterized in that: The moving iron core assembly (2) is provided with a moving iron core detection end and a moving iron core driving end at two ends respectively; the electromagnetic device further comprises a detection structure (9) which is non-contact matched with the moving iron core detection end; When the moving iron core assembly (2) is located at the initial position, the detection structure (9) outputs a first signal; when the moving iron core assembly (2) is moved to the action position after action, the moving iron core detection end is moved relative to the detection structure (9), and the detection structure (9) outputs a second signal. The electromagnetic device further comprises a circuit board (7), and the detection structure (9) is connected with the circuit board (7); the electromagnetic device further comprises a shell (1), and the coil assembly (3) and the circuit board (7) are fixedly arranged on the shell (1) respectively; the circuit board (7) comprises a circuit board first part (70) and a circuit board second part (71), the circuit board first part (70) is arranged on one side in the radial direction of the coil assembly (3), the circuit board second part (71) is arranged on one end of the coil assembly (3) and outside, and the circuit board second part (71) is provided with a circuit board opening (710) through which the moving iron core detection end passes; the detection structure (9) is arranged on the circuit board second part (71) and located on the outer peripheral side wall of the circuit board opening (710), and the detection structure (9) and the coil assembly (3) are respectively located on two sides of the circuit board second part (71); the circuit board (7) comprises the circuit board first part (70) arranged on one side in the radial direction of the coil assembly (3), and the coil assembly (3) further comprises a splicing needle (8) which is plug-in matched with the circuit board first part (70).

2. The electromagnetic device of claim 1, wherein: When the moving iron core assembly (2) is located at the initial position, the moving iron core detection end is opposite to the detection structure (9); when the moving iron core assembly (2) is moved to the action position after action, the moving iron core detection end is moved to one side of the detection structure (9).

3. The electromagnetic device of claim 2, wherein: When the moving iron core assembly (2) is located at the initial position, the length of the part of the moving iron core detection end protruding on one side of the detection structure (9) is L0; the air gap length between the moving iron core assembly (2) and the static iron core (6) is L1; L0≤L1; When the moving iron core assembly (2) is located at the action position, the moving iron core detection end is located on the other side of the detection structure (9).

4. The electromagnetic device of claim 1, wherein: The detection structure (9) is a photoelectric switch; when the moving iron core assembly (2) is located at the initial position, the moving iron core detection end is opposite to the photoelectric switch, and the photoelectric switch is off or on; when the moving iron core assembly (2) is moved to the action position after action, the moving iron core detection end is moved to one side of the photoelectric switch, and the photoelectric switch is on or off.

5. The electromagnetic device of claim 1, wherein: The detection structure (9) is a magnetic sensitive element; when the moving iron core assembly (2) is moved from the initial position to the action position, the magnetic field intensity of the environment where the magnetic sensitive element is located is changed.

6. The electromagnetic device of claim 5, wherein: The magnetic sensitive element is a Hall element.

7. The electromagnetic device of any of claims 1-6, wherein: The electromagnetic device is a separate excitation release device; when the moving iron core assembly (2) is located at the initial position, the spring (5) is relaxed, and the moving iron core assembly (2) is separated from the static iron core (6); when the moving iron core assembly (2) is located at the action position, the spring (5) is compressed, and the moving iron core assembly (2) is attracted to the static iron core (6).

8. The electromagnetic device of claim 7, wherein: The moving iron core assembly (2) comprises a moving iron core (20) and a top rod (21) moving synchronously, one end of the moving iron core (20) is a moving iron core detection end, the other end is connected with one end of the top rod (21), the other end of the top rod (21) passes through the static iron core (6) and serves as a moving iron core driving end; the spring (5) is sleeved on the top rod (21), and two ends are limited and matched with the moving iron core assembly (2) and the static iron core (6) respectively.

9. The electromagnetic device of claim 7, wherein: The moving iron core assembly (2) comprises a moving iron core (20) and a top rod (21) moving synchronously, one end of the moving iron core (20) is a moving iron core detection end, the other end is connected with one end of the top rod (21), the other end of the top rod (21) passes through the static iron core (6) and serves as a moving iron core driving end; the spring (5) is sleeved on the top rod (21), and two ends are limited and matched with the moving iron core assembly (2) and the static iron core (6) respectively.

10. The electromagnetic device of any of claims 1-6, wherein: The electromagnetic device is an under-voltage release; when the moving iron core assembly (2) is located at an initial position, the spring (5) is compressed, and the moving iron core assembly (2) is attracted to the static iron core (6); when the moving iron core assembly (2) is located at an action position, the spring (5) is relaxed, and the moving iron core assembly (2) is separated from the static iron core (6).

11. The electromagnetic device of claim 10, wherein: The moving iron core assembly (2) comprises a moving iron core (20) and a guide rod (21a) moving synchronously, one end of the moving iron core (20) serves as a moving iron core driving end, the other end is connected with one end of the guide rod (21a), the other end of the guide rod (21a) passes through the static iron core (6) and serves as a moving iron core detection end; the spring (5) is sleeved on the guide rod (21a), and two ends are limited and matched with the moving iron core assembly (2) and the static iron core (6) respectively.

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