Electromagnetic system and contactor

Abstract

The utility model belongs to low -voltage electric appliance technical field, specifically discloses a kind of electromagnetic system and contactor.The electromagnetic system provided by the utility model, its static iron core subassembly includes multiple coil winding, improve the magnetic attraction between moving iron core and static iron core subassembly, to improve the movement stroke of moving iron core;The magnetic flux of magnetic component can be conducted through first magnetic conducting piece and second magnetic conducting piece, and form magnetic field with static iron core subassembly, produce first magnetic field force, and second magnetic conducting piece is arranged around static iron core subassembly, improve first magnetic field force, to make contactor have greater initial counterforce, to meet the requirement of contactor with larger total stroke;While static iron core subassembly produces second magnetic field force with moving iron core, static iron core subassembly also produce third magnetic field force opposite to first magnetic field force, third magnetic field force can offset first magnetic field force, when static iron core subassembly adsorb moving iron core, only need to overcome smaller reset force, to further improve the movement stroke of moving iron core.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to an electromagnetic system and a contactor. Background Technology

[0002] DC contactors have been widely used in new energy vehicles, charging piles, photovoltaic power generation and other fields. A DC contactor is mainly composed of an electromagnetic system, a moving contact assembly, a stationary contact assembly, a moving iron core and a stationary iron core. When the electromagnetic system is energized, it generates electromagnetic force to drive the armature to move, so that the moving contact assembly and the stationary contact assembly are connected or disconnected.

[0003] Contactor electromagnetic systems can be broadly categorized into two structures: those with permanent magnets and those without. Electromagnetic systems without permanent magnets typically use a spring to generate the reset force. This reset force increases as the distance between the moving and stationary iron cores decreases, meaning the initial force is less than the final force. These systems are commonly used in AC / DC coil control systems. Electromagnetic systems with permanent magnets generate the reset force by magnetizing the corresponding conductive element. This reset force decreases as the distance between the moving and stationary iron cores decreases, meaning the initial force is greater than the final force. These systems are often used in DC coil control systems. Electromagnetic systems with permanent magnets often employ a single-winding solenoid "I"-shaped electromagnetic structure. The magnetic attraction force of this structure is limited by the diameter of the central solenoid, resulting in a shorter moving iron core. This makes it unsuitable for applications with high current and long stroke, and the initial force is insufficient for contactors with large strokes. Utility Model Content

[0004] The purpose of this invention is to provide an electromagnetic system and contactor that improves the magnetic attraction between the moving iron core and the stationary iron core assembly, giving the contactor a larger initial reaction force, thereby meeting the requirements of contactors with a relatively large total stroke.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, an electromagnetic system is provided, comprising:

[0007] The stationary iron core assembly includes multiple coil windings;

[0008] The moving iron core is arranged opposite to the stationary iron core assembly;

[0009] The contact support is connected to the moving iron core;

[0010] An electromagnetic reaction force assembly includes a support member, a contact support connected to one end of the support member, the support member, the contact support, and the moving iron core working together to move the moving iron core toward or away from the stationary iron core assembly, the other end of the support member surrounding the stationary iron core assembly, and magnetic elements provided on opposite sides of the other end of the support member, each magnetic element having a first magnetic guide on the side facing the stationary iron core assembly, the magnetic elements on opposite sides of the support member having a second magnetic guide on the side away from the first magnetic guide, the second magnetic guide being arranged around the stationary iron core assembly.

[0011] As an optional technical solution for the aforementioned electromagnetic system, at least one second magnetic conductive element is provided on each of the opposite sides of the static iron core assembly.

[0012] As an optional technical solution for the aforementioned electromagnetic system, the support member includes an annular member and a contact support connector. The annular member surrounds the stationary iron core assembly. The magnetic member and the first magnetic conductive member are provided on opposite sides of the annular member. The contact support connector is provided on the other opposite sides of the annular member. The contact support is connected to the contact support connector. The second magnetic conductive member surrounds the other opposite sides of the annular member.

[0013] As an optional technical solution for the aforementioned electromagnetic system, the contact support connector is provided with a mounting hole, the contact support is provided with a mounting component, the mounting component is placed in the mounting hole, one end of the mounting component facing the stationary iron core assembly is coupled to the hole wall of the mounting hole, and an elastic buffer is provided between the one end of the mounting component away from the stationary iron core assembly and the hole wall of the mounting hole.

[0014] As an optional technical solution of the above-mentioned electromagnetic system, the mounting component has a first protrusion protruding at one end facing the stationary iron core assembly. The first protrusion and the end face of the mounting component form a first stepped surface. The wall of the mounting hole has a second protrusion protruding. The second protrusion and the wall of the mounting hole form a second stepped surface. The second stepped surface is coupled with the first stepped surface. The first protrusion is located on the side of the second protrusion away from the moving iron core.

[0015] As an optional technical solution for the aforementioned electromagnetic system, the annular member has receiving grooves on both opposite sides, the first magnetic conductive member and the magnetic member are both disposed in the receiving grooves, the end of the second magnetic conductive member passes through the groove wall of the receiving groove and is placed in the receiving groove, and the middle part of the second magnetic conductive member is fixed to the other opposite sides of the annular member.

[0016] As an optional technical solution for the aforementioned electromagnetic system, both ends of the contact support connector are protruding from the edge of the annular member, and the outer sidewalls of the annular member on opposite sides are recessed with positioning grooves. The middle part of the second magnetic conductor fits against the inner sidewall of the annular member where the contact support protrudes, and both ends of the second magnetic conductor are placed in the positioning grooves.

[0017] As an optional technical solution for the aforementioned electromagnetic system, the magnetic component is provided with a foolproof chamfer.

[0018] As an optional technical solution for the aforementioned electromagnetic system, an elastic reset member is provided at the other end of the support member away from the side supported by the contact. The elastic reset member is configured to apply a force to the support member in the direction of the moving iron core.

[0019] As an optional technical solution for the aforementioned electromagnetic system, the other end of the support member is provided with a mounting cavity on the side opposite to the contact support, and one end of the elastic reset member is placed in the mounting cavity.

[0020] As an optional technical solution for the aforementioned electromagnetic system, the static iron core assembly further includes a first magnetic flux plate and a second magnetic flux plate. The first magnetic flux plate is provided with magnetic flux posts corresponding one-to-one with the coil windings, and the coil windings are sleeved on the magnetic flux posts. The second magnetic flux plate is arranged one-to-one with the coil windings, and the second magnetic flux plate is located at the end of the coil windings away from the first magnetic flux plate, and the second magnetic flux plate is connected to the magnetic flux posts.

[0021] Secondly, a contactor is provided, including a base and the aforementioned electromagnetic system, wherein the stationary iron core assembly is disposed within the base, and the other end of the support member is slidably connected to the inner sidewall of the base.

[0022] The beneficial effects of this utility model are:

[0023] The electromagnetic system provided by this utility model includes a stationary iron core assembly comprising multiple coil windings, which enhances the magnetic attraction between the moving iron core and the stationary iron core assembly, thereby increasing the travel distance of the moving iron core. The magnetic flux of the magnetic components can be conducted through the first and second magnetic conductive components, forming a magnetic field with the stationary iron core assembly and generating a first magnetic force. The second magnetic conductive component surrounds the stationary iron core assembly, further enhancing the first magnetic force. When the coil windings are energized, the stationary iron core assembly generates a second magnetic force that attracts the moving iron core. The first and second magnetic forces are in opposite directions, and the first magnetic force is used to drive the moving iron core to reset. This, in turn, drives the contacts to support reset. The first magnetic force is greater than that of the first magnetic force in the contactor in the prior art, thus giving the contactor a larger initial reaction force, thereby meeting the requirements of contactors with a larger total stroke. In addition, while the stationary iron core assembly generates a second magnetic force with the moving iron core, the stationary iron core assembly also generates a third magnetic force opposite to the first magnetic force. The third magnetic force can cancel out the first magnetic force. When the stationary iron core assembly attracts the moving iron core, it only needs to overcome a reset force that is smaller than that required by the contactor in the prior art, thereby further increasing the movement stroke of the moving iron core. Attached Figure Description

[0024] Figure 1 This is a partial structural schematic diagram of the contactor provided in an embodiment of the present utility model;

[0025] Figure 2 This is an axonometric view of the electromagnetic system provided in an embodiment of the present invention;

[0026] Figure 3 This is a cross-sectional view of the electromagnetic reaction force component provided in this embodiment of the utility model;

[0027] Figure 4 This is an isometric view of the static iron core assembly provided in this embodiment of the present invention;

[0028] Figure 5 This is an exploded structural diagram of the static iron core assembly provided in this embodiment of the utility model;

[0029] Figure 6 This is an exploded structural diagram of the electromagnetic reaction force component provided in this embodiment of the utility model;

[0030] Figure 7 This is a first-view structural schematic diagram of the contact support and electromagnetic reaction force assembly provided in the embodiment of the present invention;

[0031] Figure 8 This is a second-view structural schematic diagram of the contact support and electromagnetic reaction force assembly provided in this embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the connection between the elastic reset member and the support member provided in this embodiment of the utility model.

[0033] In the picture:

[0034] 100. Base shell; 200. Stationary contact assembly; 300. Moving contact assembly;

[0035] 1. Static iron core assembly; 2. Moving iron core; 3. Contact support; 4. Electromagnetic reaction force assembly; 5. Elastic buffer; 6. Elastic reset component;

[0036] 11. Coil winding; 12. First magnetic flux plate; 13. Second magnetic flux plate; 14. Magnetic flux column; 15. Coil support;

[0037] 31. Mounting component; 32. First protrusion; 33. First stepped surface; 34. Cavity; 35. Limiting groove;

[0038] 41. Support component; 411. Ring-shaped component; 412. Contact support connector; 413. Mounting hole; 414. Second protrusion; 415. Second stepped surface; 416. Receiving groove; 417. Positioning groove; 418. Mounting cavity; 419. Limiting post; 42. Magnetic component; 421. Foolproof chamfer; 43. First magnetic conductive component; 44. Second magnetic conductive component. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] like Figure 1 As shown, this embodiment provides a contactor, which can be a permanent magnet DC contactor. The contactor includes a base housing 100 and an electromagnetic system. A stationary contact assembly 200 is provided inside the base housing 100, and a moving contact assembly 300 is connected to the electromagnetic system. The electromagnetic system moves relative to the base housing 100 to drive the moving contact assembly 300 to engage or disengage with the stationary contact assembly 200, thereby realizing the contactor's power control over external devices.

[0044] like Figures 1 to 3 As shown, the electromagnetic system includes a stationary iron core assembly 1, a moving iron core 2, a contact support 3, and an electromagnetic reaction force assembly 4. The stationary iron core assembly 1 is disposed inside the bottom shell 100 and includes multiple coil windings 11. The moving iron core 2 is disposed opposite to the stationary iron core assembly 1, and the contact support 3 is connected to the moving iron core 2. The electromagnetic reaction force assembly 4 includes a support member 41, a contact support 3 connected to one end of the support member 41, the support member 41, the contact support 3 and the moving iron core 2 are linked together to move the moving iron core 2 toward or away from the stationary iron core assembly 1, the other end of the support member 41 is arranged around the stationary iron core assembly 1, the other end of the support member 41 is slidably connected to the inner side wall of the bottom shell 100, magnetic members 42 are provided on both opposite sides of the other end of the support member 41, each magnetic member 42 is provided with a first magnetic guide 43 on the side facing the stationary iron core assembly 1, the magnetic members 42 on opposite sides of the support member 41 are connected to the side away from the first magnetic guide 43 by a second magnetic guide 44, the second magnetic guide 44 is arranged around the stationary iron core assembly 1.

[0045] The stationary iron core assembly 1 includes multiple coil windings 11, which increases the magnetic attraction between the moving iron core 2 and the stationary iron core assembly 1, thereby increasing the travel distance of the moving iron core 2. The magnetic flux of the magnetic element 42 can be conducted through the first magnetic conductor 43 and the second magnetic conductor 44, forming a magnetic field with the stationary iron core assembly 1 and generating a first magnetic field force. The second magnetic conductor 44 is arranged around the stationary iron core assembly 1, which enhances the first magnetic field force. When the coil windings 11 are energized, the stationary iron core assembly 1 generates a second magnetic field force that attracts the moving iron core 2. The first magnetic field force is opposite in direction to the second magnetic field force, and the first magnetic field force is used to drive the moving iron core 2 to reset. This causes the contact support 3 to reset. The first magnetic force is greater than that of the first magnetic force of the contactor in the prior art, thus giving the contactor a larger initial reaction force, thereby meeting the requirements of the contactor with a larger total stroke. In addition, while the stationary iron core assembly 1 generates a second magnetic force with the moving iron core 2, the stationary iron core assembly 1 also generates a third magnetic force opposite to the first magnetic force. The third magnetic force can cancel the first magnetic force. When the stationary iron core assembly 1 attracts the moving iron core 2, it only needs to overcome a reset force that is smaller than that required by the contactor in the prior art, thereby further increasing the movement stroke of the moving iron core 2.

[0046] The moving contact assembly 300 is connected to the contact support 3. The specific connection structure between the moving contact assembly 300 and the contact support 3 is existing technology and will not be described in detail here. When the coil winding 11 is energized, the stationary iron core assembly 1 generates a second magnetic field force that attracts the moving iron core 2, thereby driving the contact support 3 to move towards the stationary iron core assembly 1, and the moving contact assembly 300 and the stationary contact assembly 200 are attracted together. When the coil winding 11 is de-energized, the magnetic flux of the magnetic element 42 is conducted through the first magnetic conductor 43 and the second magnetic conductor 44, and forms a magnetic field with the stationary iron core assembly 1. The generated first magnetic field force causes the moving iron core 2 to move in a direction away from the stationary iron core assembly 1, that is, the moving iron core 2 is reset, thereby driving the contact support 3 to move in a direction away from the stationary iron core assembly 1, and the moving contact assembly 300 and the stationary contact assembly 200 are disconnected.

[0047] In some embodiments, such as Figure 4 and Figure 5As shown, the stationary iron core assembly 1 also includes a first magnetic flux plate 12 and a second magnetic flux plate 13. The first magnetic flux plate 12 is provided with magnetic flux posts 14 corresponding one-to-one with the coil windings 11. The coil windings 11 are sleeved on the magnetic flux posts 14. The second magnetic flux plate 13 is arranged one-to-one with the coil windings 11. The second magnetic flux plate 13 is disposed at the end of the coil windings 11 away from the first magnetic flux plate 12, and the second magnetic flux plate 13 is connected to the magnetic flux posts 14. The second magnetic flux plate 13 is configured to generate a first magnetic field force with the electromagnetic reaction force assembly 4 and a second magnetic field force with the moving iron core 2. A U-shaped stationary iron core structure is formed by a first magnetic flux plate 12, two magnetic flux pillars 14, and two second magnetic flux plates 13. Each coil winding 11 is wound with a corresponding magnetic flux pillar 14 and is located between the first magnetic flux plate 12 and one of the second magnetic flux plates 13. When the coil winding 11 is energized, the first magnetic flux plate 12, the two magnetic flux pillars 14, the two second magnetic flux plates 13, and the moving iron core 2 can jointly form a magnetic field. A third magnetic field force is formed between the coil winding 11 and the first magnetic flux plate 12, the second magnetic flux plate 13, and the magnetic flux pillars 14. Compared with the traditional single-coil electromagnetic system, the two coil windings 11 have a larger magnetic flux, which can improve the magnetic attraction between the stationary iron core assembly 1 and the moving iron core 2, thereby increasing the movement stroke of the moving iron core 2 and adapting to the situation of large current and large stroke.

[0048] Optionally, the stationary core assembly 1 further includes a coil support 15, which is arranged in a one-to-one correspondence with the coil winding 11. Multiple coil supports 15 can be spliced ​​together sequentially. The coil supports 15 are I-shaped, and the magnetic flux post 14 passes through the coil support 15. A first magnetic flux plate 12 is disposed on one side of the coil support 15, and the magnetic flux post 14 is exposed outside the coil support 15. A second magnetic flux plate 13 is disposed on the other side of the coil support 15, and the second magnetic flux plate 13 is fixedly connected to the end of the magnetic flux post 14 exposed outside the coil support 15. Optionally, the second magnetic flux plate 13 is connected to the magnetic flux post 14 by bolts.

[0049] In some embodiments, combined with Figure 2 and Figure 6 As shown, at least one second magnetic conductive element 44 is provided on each of the opposite sides of the static iron core assembly 1 to increase the conduction of magnetic flux of magnetic element 42 and further improve the first magnetic field force.

[0050] The ends of the second magnetic conductive element 44 and the first magnetic conductive element 43 are disposed on opposite sides of the magnetic element 42, and both the ends of the second magnetic conductive element 44 and the first magnetic conductive element 43 are in close contact with the magnetic element 42, thereby increasing the magnetic flux conduction. Optionally, the area of ​​the first magnetic conductive element 43 is greater than or equal to the side surface area of ​​the magnetic element 42, and the sum of the end areas of the multiple second magnetic conductive elements 44 is greater than or equal to the side surface area of ​​the magnetic element 42, in order to increase the magnetic flux conduction.

[0051] In some embodiments, the support member 41 includes an annular member 411 and a contact support connector 412. The annular member 411 surrounds the stationary iron core assembly 1. Magnetic members 42 and first magnetic conductive members 43 are provided on opposite sides of the annular member 411. Contact support connectors 412 are provided on the other opposite sides of the annular member 411. The contact support 3 is connected to the contact support connector 412. A second magnetic conductive member 44 is arranged around the other opposite sides of the annular member 411. This support member 41 has a simple structure and achieves the fixation of the magnetic members 42, the first magnetic conductive members 43, and the contact support 3.

[0052] Optionally, such as Figure 7 and Figure 8 As shown, the contact support connector 412 has a plate-like structure, with one end of the contact support connector 412 protruding from the edge of the annular member 411, and the contact support 3 is placed between the two contact support connectors 412.

[0053] The contact support connector 412 has a mounting hole 413, and the contact support 3 has a mounting member 31. The mounting member 31 is placed inside the mounting hole 413. The end of the mounting member 31 facing the stationary iron core assembly 1 is coupled to the hole wall of the mounting hole 413, and an elastic buffer member 5 is provided between the end of the mounting member 31 facing away from the stationary iron core assembly 1 and the hole wall of the mounting hole 413. When the moving contact assembly 300 and the stationary contact assembly 200 are separated, the elastic buffer member 5 plays a buffering role for the contact support 3, preventing the contact support 3 from impacting the support member 41.

[0054] Optionally, mounting members 31 are respectively provided on opposite sides of the contact support 3. A cavity 34 is formed between the end of the mounting member 31 away from the stationary iron core assembly 1 and the surface of the contact support 3. When the mounting member 31 is placed in the mounting hole 413, part of the contact support connector 412 is placed in the cavity 34, and a space is formed between the contact support connector 412 and the cavity 34 for the contact support 3 to move relative to the contact support connector 412.

[0055] The elastic buffer 5 can be a spring. The end of the mounting part 31 facing away from the stationary iron core assembly 1 is recessed with a limiting groove 35. The wall of the mounting hole 413 is provided with a limiting post 419. One end of the spring is placed in the limiting groove 35, and the other end of the spring is sleeved on the limiting post 419. The setting of the limiting post 419 and the limiting groove 35 plays a positioning role for the spring.

[0056] The mounting member 31 has a first protrusion 32 protruding at one end facing the stationary iron core assembly 1. The first protrusion 32 and the end face of the mounting member 31 form a first stepped surface 33. The wall of the mounting hole 413 has a second protrusion 414 protruding. The second protrusion 414 and the wall of the mounting hole 413 form a second stepped surface 415. The second stepped surface 415 is coupled with the first stepped surface 33. The first protrusion 32 is placed on the side of the second protrusion 414 away from the moving iron core 2, so that the mounting member 31 does not detach from the mounting hole 413, thereby fixing the contact support 3 on the support member 41.

[0057] Optionally, see [link to relevant documentation] Figure 6 As shown, the annular member 411 has receiving grooves 416 on both opposite sides. The first magnetic conductive member 43 and the magnetic member 42 are both disposed in the receiving grooves 416. The end of the second magnetic conductive member 44 passes through the groove wall of the receiving groove 416 and is placed in the receiving groove 416. The middle part of the second magnetic conductive member 44 is fixed to the other opposite sides of the annular member 411. In addition to increasing the magnetic flux, the second magnetic conductive member 44 also increases the strength of the annular member 411.

[0058] The middle part of the second magnetic conductive element 44 is a long strip plate structure, and the shapes of the two ends of the second magnetic conductive element 44 are adapted to the shape of the magnetic element 42. Preferably, a second magnetic conductive element 44 is provided on each of the opposite sides of the stationary iron core assembly 1, and the ends of the two second magnetic conductive elements 44 are spliced ​​to form a shape adapted to the magnetic element 42 to improve the magnetic flux conduction effect.

[0059] Both ends of the contact support connector 412 protrude from the edge of the annular member 411. The outer walls of the annular member 411 on opposite sides are recessed with positioning grooves 417. The middle part of the second magnetic conductor 44 protrudes from the inner wall of the annular member 411 and fits against the contact support 3. Both ends of the second magnetic conductor 44 are placed within the positioning grooves 417, which serve to position the second magnetic conductor 44. The bent shape of the second magnetic conductor 44 is adapted to the shape of the annular member 411, and is not specifically limited here.

[0060] The magnetic component 42 is provided with a foolproof chamfer 421 to ensure that the first magnetic conductive components 43, which are located on opposite sides of the support component 41 and opposite to the magnetic component 42, have opposite magnetic properties when the magnetic component 42 is installed. The magnetic component 42 is a permanent magnet.

[0061] In some embodiments, such as Figure 9As shown, an elastic reset member 6 is provided at the other end of the support member 41, away from the contact support 3. The elastic reset member 6 is configured to apply a force to the support member 41 in the direction of the moving iron core 2. The force applied by the elastic reset member 6 to the support member 41 is in the same direction as the first magnetic force. When the elastic reset member 6 resets the moving iron core 2, the electromagnetic reaction force assembly 4 can be subjected to the first magnetic attraction force of the stationary iron core assembly 1, so that the electromagnetic reaction force assembly 4 can drive the moving iron core 2 to reset. The first magnetic attraction force plays an auxiliary role in the reset of the moving iron core 2, which helps to reduce the reset force required by the elastic reset member 6. That is, an elastic reset member 6 with a smaller reset force can be used, thus reducing the reset requirements of the elastic reset member 6.

[0062] Optionally, the other end of the support member 41, away from the contact support 3, has a mounting cavity 418. One end of the elastic reset member 6 is placed in the mounting cavity 418, which not only fixes the elastic reset member 6, but also serves as a guide when the elastic reset member 6 is compressed and deformed. The other end of the elastic reset member 6 is fixed inside the bottom shell 100. The elastic reset member 6 can be a spring, which is not specifically limited here.

[0063] In summary, by setting multiple coil windings 11, the magnetic attraction between the moving iron core 2 and the stationary iron core assembly 1 is increased, thereby increasing the travel distance of the moving iron core 2. The magnetic flux of the magnetic component 42 can be conducted through the first magnetic conductor 43 and the second magnetic conductor 44, forming a magnetic field with the stationary iron core assembly 1 and generating a first magnetic field force. The second magnetic conductor 44 is arranged around the stationary iron core assembly 1, which enhances the first magnetic field force. When the coil windings 11 are energized, the stationary iron core assembly 1 generates a second magnetic field force that attracts the moving iron core 2. The first magnetic field force is opposite in direction to the second magnetic field force, and the first magnetic field force is used to drive the moving iron core 2 to reset. This, in turn, causes the contact support 3 to reset. The first magnetic force is greater than that of the first magnetic force in the contactor in the prior art, thus giving the contactor a larger initial reaction force, thereby meeting the requirements of a contactor with a larger total stroke. In addition, while the stationary iron core assembly 1 generates a second magnetic force with the moving iron core 2, the stationary iron core assembly 1 also generates a third magnetic force opposite to the first magnetic force. The third magnetic force can cancel out the first magnetic force. When the stationary iron core assembly 1 attracts the moving iron core 2, it only needs to overcome a reset force that is smaller than that required by the contactor in the prior art, thereby further increasing the movement stroke of the moving iron core 2.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electromagnetic system, characterized in that, include: The stationary iron core assembly (1) includes multiple coil windings (11); The moving iron core (2) is arranged opposite to the stationary iron core assembly (1); The contact support (3) is connected to the moving iron core (2); The electromagnetic reaction force assembly (4) includes a support member (41). The contact support (3) is connected to one end of the support member (41). The support member (41), the contact support (3), and the moving iron core (2) are linked together to move the moving iron core (2) toward or away from the stationary iron core assembly (1). The other end of the support member (41) is arranged around the stationary iron core assembly (1). Magnetic members (42) are provided on both opposite sides of the other end of the support member (41). Each magnetic member (42) has a first magnetic guide (43) on the side facing the stationary iron core assembly (1). The magnetic members (42) on opposite sides of the support member (41) are connected to the side away from the first magnetic guide (43) by a second magnetic guide (44). The second magnetic guide (44) is arranged around the stationary iron core assembly (1).

2. The electromagnetic system according to claim 1, characterized in that, The static iron core assembly (1) has at least one second magnetic conductive element (44) on each of its opposite sides.

3. The electromagnetic system according to claim 1, characterized in that, The support member (41) includes an annular member (411) and a contact support connector (412). The annular member (411) is arranged around the stationary iron core assembly (1). The magnetic member (42) and the first magnetic conductive member (43) are provided on opposite sides of the annular member (411). The contact support connector (412) is provided on the other opposite sides of the annular member (411). The contact support (3) is connected to the contact support connector (412). The second magnetic conductive member (44) is arranged around the other opposite sides of the annular member (411).

4. The electromagnetic system according to claim 3, characterized in that, The contact support connector (412) is provided with a mounting hole (413), the contact support (3) is provided with a mounting member (31), the mounting member (31) is placed in the mounting hole (413), one end of the mounting member (31) facing the stationary iron core assembly (1) is coupled to the hole wall of the mounting hole (413), and an elastic buffer member (5) is provided between the other end of the mounting member (31) away from the stationary iron core assembly (1) and the hole wall of the mounting hole (413).

5. The electromagnetic system according to claim 4, characterized in that, The mounting member (31) has a first protrusion (32) protruding at one end facing the stationary iron core assembly (1). The first protrusion (32) and the end face of the mounting member (31) form a first stepped surface (33). The wall of the mounting hole (413) has a second protrusion (414) protruding. The second protrusion (414) and the wall of the mounting hole (413) form a second stepped surface (415). The second stepped surface (415) is coupled to the first stepped surface (33). The first protrusion (32) is placed on the side of the second protrusion (414) away from the moving iron core (2).

6. The electromagnetic system according to claim 3, characterized in that, The annular member (411) has receiving grooves (416) on both opposite sides. The first magnetic conductive member (43) and the magnetic member (42) are both disposed in the receiving grooves (416). The end of the second magnetic conductive member (44) passes through the groove wall of the receiving groove (416) and is placed in the receiving groove (416). The middle part of the second magnetic conductive member (44) is fixed to the other opposite sides of the annular member (411).

7. The electromagnetic system according to claim 6, characterized in that, Both ends of the contact support connector (412) are protruding from the edge of the annular member (411). The outer side walls of the annular member (411) on both sides are recessed with positioning grooves (417). The middle part of the second magnetic conductor (44) is attached to the inner side wall of the annular member (411) where the contact support (3) protrudes. Both ends of the second magnetic conductor (44) are placed in the positioning grooves (417).

8. The electromagnetic system according to claim 1, characterized in that, The magnetic component (42) is provided with a foolproof chamfer (421).

9. The electromagnetic system according to claim 1, characterized in that, The other end of the support member (41) is provided with an elastic reset member (6) on the side opposite to the contact support (3), and the elastic reset member (6) is configured to apply a force to the support member (41) in the direction of the moving iron core (2).

10. The electromagnetic system according to claim 9, characterized in that, The other end of the support member (41) is provided with a mounting cavity (418) on the side opposite to the contact support (3), and one end of the elastic reset member (6) is placed in the mounting cavity (418).

11. The electromagnetic system according to claim 1, characterized in that, The static iron core assembly (1) further includes a first magnetic flux plate (12) and a second magnetic flux plate (13). The first magnetic flux plate (12) is provided with magnetic flux posts (14) that correspond one-to-one with the coil winding (11). The coil winding (11) is sleeved on the magnetic flux post (14). The second magnetic flux plate (13) is arranged one-to-one with the coil winding (11). The second magnetic flux plate (13) is arranged at the end of the coil winding (11) away from the first magnetic flux plate (12), and the second magnetic flux plate (13) is connected to the magnetic flux post (14).

12. A contactor, characterized in that, The system includes a base shell (100) and an electromagnetic system according to any one of claims 1-11, wherein the static iron core assembly (1) is disposed inside the base shell (100), and the other end of the support member (41) is slidably connected to the inner sidewall of the base shell (100).

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