Mechanism for reducing release voltage of electromagnet

Abstract

The invention discloses a mechanism for reducing the release voltage of an electromagnet, the mechanism comprises a coil assembly, a shell assembly and a motion assembly, the coil assembly and the motion assembly are arranged in the shell assembly, and the coil assembly is connected with the motion assembly. An energizing loop is formed on the coil assembly, the shell assembly and the moving assembly, so that the magnetic poles are attached to or separated from the iron core, and the electromagnetic coil has the advantages of being small in size, light in weight, reliable in work and the like; the release voltage of the electromagnet is reduced, reliable work is kept when abnormal voltage transients in a power supply system, and the application range of the electromagnet is expanded.

Description

Technical Field

[0001] The invention belongs to the technical field of electromagnets, and in particular relates to a mechanism for reducing the release voltage of an electromagnet. Background Art

[0002] The existing electromagnet mechanism, under limited volume and weight, has a high release voltage when meeting the initial spring pressure requirements and the core movement stroke, and does not meet the requirement of maintaining reliable operation during abnormal voltage transients (undervoltage) in the power supply system.

[0003] The announcement number CN119132785A discloses an electromagnet with power reduction when switching the coil. The iron yoke is connected to the iron core, and the butt joint is fixed to the armature. The spring is assembled between the armature and the iron core. The coil frame is assembled between the iron yoke and the armature. The electromagnet coil is switched from the high-power coil 1 to the low-power coil 2 after being energized by the mechanical conversion of the connecting rod and the connecting plate, thereby reducing the heat generation of the product and increasing the service life of the product without affecting the function of the electromagnet. However, the electromagnet is not provided with a magnet.

[0004] Announcement No. CN218585909U discloses a high-performance fast-response electromagnet for circuit breaker control systems, including: an upper iron yoke assembly, an iron core assembly, a coil assembly, a lower iron yoke assembly and a rear cover assembly; when the coil is energized, the moving iron core moves upward due to the electromagnetic force, so the connecting spring contracts, driving the limit screw to further lift the moving iron core upward, thereby increasing the response speed of the electromagnet, and reducing the electromagnetic force to overcome the gravity of the moving iron core. Therefore, under the same response requirements, the energy power of the coil can be reduced, and the volume of the copper wire can be increased, and the heating rate can be reduced. However, the magnetic pole is in direct contact with the iron yoke and the iron core, has no protective structure, and is easily damaged. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a mechanism for reducing the release voltage of the electromagnet.

[0006] The present invention is achieved through the following technical solutions.

[0007] The present invention provides a mechanism for reducing the release voltage of an electromagnet, comprising a coil component, a shell component and a moving component. The coil component and the moving component are arranged in the shell component, and the coil component and the moving component are connected.

[0008] Preferably, the housing assembly comprises a flange and an iron yoke, the iron yoke is arranged to wrap the coil assembly, and one end of the iron yoke is fixed to the flange by screws, rivets or welding.

[0009] Preferably, a first platform is arranged at one end of the iron yoke, a first through hole is arranged on the first platform, and a second through hole is arranged on the flange.

[0010] Preferably, the moving component passes through the coil component, and the moving component includes an elastic part, a magnetic pole, a core rod, a permanent magnet and an iron core. The core rod passes through the elastic part, the magnetic pole and the iron core. The elastic part is arranged between the magnetic pole and the iron core, and the permanent magnet is arranged between the magnetic pole and the shell component.

[0011] Preferably, the moving component includes a liner, the outer wall of the liner is connected to the coil assembly, the magnetic pole and the iron core are slidably connected to the inner wall of the liner, and the coil assembly and the liner are coaxially arranged with the magnetic pole.

[0012] Preferably, a first step is provided at one end of the core rod, and a second step is provided at the other end of the core rod.

[0013] Preferably, a step hole is provided on the iron core, and the core rod passes through the iron core through the step hole.

[0014] Preferably, a brim piece and a nut are provided at one end of the core rod, the brim piece is provided between the nut and the iron core, and the core rod passes through the brim piece and is threadedly connected with the nut.

[0015] Preferably, the core rod is made of non-magnetic material.

[0016] Preferably, the bushing is made of brass.

[0017] The beneficial effects of the present invention are:

[0018] The present invention forms an energized circuit on the coil assembly, the housing assembly and the moving assembly, thereby achieving the bonding or separation of the magnetic pole and the iron core. The present invention has the advantages of small size, light weight, reliable operation, etc.; the release voltage of the electromagnet is reduced, and reliable operation is maintained when abnormal voltage transients occur in the power supply system, thereby expanding the scope of use of the electromagnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the coil assembly of the present invention when the coil is not energized;

[0020] Figure 2 It is a schematic structural diagram of the coil assembly of the present invention when the coil is energized;

[0021] In the figure: 1-nut, 2-brim plate, 3-flange, 31-second through hole, 4-coil assembly, 5-iron yoke, 51-first platform, 52-first through hole, 6-elastic member, 7-magnetic pole, 8-core rod, 81-first step, 82-second step, 9-permanent magnet, 10-bushing, 11-iron core, 111-step hole. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0023] Example:

[0024] like Figure 1-2 As shown, a mechanism for reducing the release voltage of an electromagnet includes a coil assembly 4, a shell assembly and a moving assembly. The coil assembly 4 and the moving assembly are arranged in the shell assembly, the coil assembly 4 and the moving assembly are connected, and the coil assembly 4 is connected to a power supply system.

[0025] The housing assembly includes a flange 3 and an iron yoke 5, wherein the iron yoke 5 is arranged to wrap the coil assembly 4, the flange 3 is fitted with the iron yoke 5, one end of the iron yoke 5 is fixed to the flange 3 by screws, rivets or welding, and the flange 3 is mounted on the liner 10.

[0026] A first platform 51 is provided at one end of the iron yoke 5, a first through hole 52 is provided on the first platform 51, the core rod 8 passes through one end of the iron yoke 5 through the first through hole 52, a second through hole 31 is provided on the flange 3, and the iron core 11 is slidably connected to the flange 3 through the second through hole 31.

[0027] The moving assembly passes through the coil assembly 4, and the moving assembly includes an elastic member 6, a magnetic pole 7, a core rod 8, a permanent magnet 9 and an iron core 11. The core rod 8 passes through the elastic member 6, the magnetic pole 7 and the iron core 11. The elastic member 6 is arranged between the magnetic pole 7 and the iron core 11. The elastic member 6 can be a spring. The upper end of the magnetic pole 7 is riveted or welded on the iron yoke 5. The permanent magnet 9 is arranged between the magnetic pole 7 and the iron yoke 5 of the housing assembly, and they fit closely to each other to prevent the iron core 11 from directly hitting and damaging the permanent magnet 9 when it moves. The direction of the magnetic field generated by the coil assembly 4 when it is energized is the same as the direction of the magnetic field of the permanent magnet 9.

[0028] The moving assembly includes a liner 10 , the outer wall of the liner 10 is connected to the coil assembly 4 , the magnetic pole 7 and the iron core 11 are slidably connected to the inner wall of the liner 10 , and the coil assembly 4 and the liner 10 are coaxially arranged with the magnetic pole 7 .

[0029] A first step 81 is provided at one end of the core rod 8, and a second step 82 is provided at the other end of the core rod 8. The first step 81 can be closely connected with the first platform 51 of the iron yoke 5 to limit the core rod 8. The second step 82 is provided in the step hole 111 to limit the core rod 8.

[0030] The iron core 11 is provided with a step hole 111 , and the core rod 8 passes through the iron core 11 through the step hole 111 .

[0031] A brim piece 2 and a nut 1 are arranged at one end of the core rod 8, the brim piece 2 is arranged between the nut 1 and the core 11, and the core rod 8 is threadedly connected with the nut 1 after passing through the brim piece 2. In order to prevent the fastening nut 1 from loosening, the end of the core rod 8 and the nut 1 can be welded into one body.

[0032] The core rod 8 is made of non-magnetic stainless steel to avoid magnetic adhesion during power-on, which would affect the normal operation of the electromagnet.

[0033] The bushing 10 is made of brass and has good lubricity.

[0034] The magnetic pole 7, iron yoke 5, flange 3, iron core 11 and brim piece 2 are made of magnetic conductive materials.

[0035] The working process of the mechanism of the present invention is:

[0036] When the coil assembly 4 is energized, the magnetic flux generated by the coil assembly 4 forms a loop through the iron core 11 → the air gap between the iron core 11 and the magnetic pole 7 → the magnetic pole 7 → the permanent magnet 9 → the iron yoke 5 → the flange 3 → the iron core 11. When the voltage applied to the coil assembly 4 is increased to the point where the sum of the suction force generated by the coil assembly 4 plus the suction force generated by the permanent magnet 9 is greater than the elastic force of the elastic member 6, the iron core 11 is attracted to the magnetic pole 7. The electromagnetic suction force is proportional to the square of the air gap (the distance between the iron core 11 and the magnetic pole 7). As the air gap between the iron core 11 and the magnetic pole 7 decreases, the suction force increases rapidly. Although the elastic force of the elastic member 6 increases after being compressed, it is still smaller than the suction force generated by the coil assembly 4 and the permanent magnet 9. The iron core 11 continues to be attracted to the magnetic pole 7 until it is completely attached to the magnetic pole 7. The air gap between the iron core 11 and the magnetic pole 7 approaches zero. With the help of the suction force of the permanent magnet 9, the iron core 11 can be reliably attracted to the magnetic pole 7. Figure 2 shown.

[0037] When an abnormal voltage transient (undervoltage) occurs in the power supply system, the electromagnetic attraction generated by the coil assembly 4 decreases, and the electromagnetic attraction generated by the coil assembly 4 alone cannot overcome the elastic force of the elastic member 6. However, with the help of the attraction of the permanent magnet 9, the sum of the attraction generated by the coil assembly 4 and the attraction generated by the permanent magnet 9 can overcome the elastic force of the elastic member 6, so that the iron core 11 remains adsorbed on the magnetic pole 7 and works reliably, reducing the release voltage of the electromagnet, enhancing the ability of the electromagnet to resist undervoltage in the power supply system, and making the adsorption of the iron core 11 and the magnetic pole 7 more reliable when the electromagnet is working normally, thereby improving durability.

[0038] The permanent magnet 9 can provide a magnetic force, which is superimposed on the electromagnetic attraction of the coil assembly 4. At the same time, after adsorption, there is no air gap between the iron core 11 and the magnetic pole 7, and the magnetic resistance in the magnetic circuit is reduced, thereby reducing the release voltage.

[0039] Only by further reducing the power supply voltage of the coil assembly 4, the electromagnetic attraction continues to decrease, and the sum of the electromagnetic attraction generated by the coil assembly 4 and the attraction generated by the permanent magnet 9 cannot overcome the elastic force of the elastic member 6, and the iron core 11 leaves the magnetic pole 7 and returns to Figure 1 Position shown.

Claims

1. A mechanism for reducing the release voltage of an electromagnet, characterized in that: It comprises a coil component (4), a shell component and a moving component. The coil component (4) and the moving component are arranged in the shell component, and the coil component (4) and the moving component are connected.

2. A mechanism for reducing the release voltage of an electromagnet as claimed in claim 1, characterized in that: The housing assembly comprises a flange (3) and an iron yoke (5), wherein the iron yoke (5) is arranged to wrap the coil assembly (4), and one end of the iron yoke (5) is fixed to the flange (3) by screws, rivets or welding.

3. A mechanism for reducing the release voltage of an electromagnet as claimed in claim 2, characterized in that: A first platform (51) is provided at one end of the iron yoke (5), a first through hole (52) is provided on the first platform (51), and a second through hole (31) is provided on the flange (3).

4. A mechanism for reducing the release voltage of an electromagnet as claimed in claim 1, characterized in that: The moving component passes through the coil component (4), and comprises an elastic component (6), a magnetic pole (7), a core rod (8), a permanent magnet (9) and an iron core (11); the core rod (8) passes through the elastic component (6), the magnetic pole (7) and the iron core (11); the elastic component (6) is arranged between the magnetic pole (7) and the iron core (11); and the permanent magnet (9) is arranged between the magnetic pole (7) and the shell component.

5. A mechanism for reducing the release voltage of an electromagnet as claimed in claim 4, characterized in that: The moving component comprises a liner (10), the outer wall of the liner (10) is connected to the coil component (4), the magnetic pole (7) and the iron core (11) are slidably connected to the inner wall of the liner (10), and the coil component (4) and the liner (10) are coaxially arranged with the magnetic pole (7).

6. A mechanism for reducing the release voltage of an electromagnet as claimed in claim 4, characterized in that: A first step (81) is provided at one end of the core rod (8), and a second step (82) is provided at the other end of the core rod (8).

7. A mechanism for reducing the release voltage of an electromagnet as claimed in claim 4, characterized in that: The iron core (11) is provided with a stepped hole (111), and the core rod (8) passes through the stepped hole (111) and penetrates the iron core (11).

8. A mechanism for reducing the release voltage of an electromagnet as claimed in claim 4, characterized in that: A brim piece (2) and a nut (1) are arranged at one end of the core rod (8); the brim piece (2) is arranged between the nut (1) and the iron core (11); and the core rod (8) penetrates the brim piece (2) and is threadedly connected to the nut (1).

9. A mechanism for reducing the release voltage of an electromagnet as claimed in claim 4, characterized in that: The core rod (8) is made of non-magnetic material.

10. A mechanism for reducing the release voltage of an electromagnet as claimed in claim 5, characterized in that: The liner (10) is made of brass.

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