Permanent magnet type electromagnetic system and contactor

Abstract

The utility model provides a permanent magnet type electromagnetic system and a contactor. The permanent magnet type electromagnetic system comprises a static iron core, two coil windings, a movable iron core and a magnetic conduction driving assembly. The two coil windings are arranged on the static iron core; the movable iron core is arranged opposite to the static iron core along a first direction; the magnetic conductive driving assembly is connected with the movable iron core, a first magnetic field force is generated between the magnetic conductive driving assembly and the static iron core, the first magnetic field force is used for driving the magnetic conductive driving assembly to move towards the movable iron core so as to reset the movable iron core, and a second magnetic field force is generated between the movable iron core and the static iron core so as to reset the movable iron core. And a third magnetic field force is generated between the static iron core and the coil winding. The third magnetic field force is opposite to the first magnetic field force, and the second magnetic field force is opposite to the first magnetic field force. The moving stroke of the movable iron core can be effectively improved.

Description

Technical Field

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

[0002] In a permanent magnet DC contactor, the permanent magnet of the electromagnetic system dominates when the coil winding is not energized or the voltage is insufficient. This magnetizes the magnetic plate, causing it to attract the lower armature connected to the iron core, keeping the contactor in the open state. When the coil winding is energized and the voltage is sufficiently high, the electromagnetic field of the coil winding dominates. This magnetizes the yoke, attracting the upper armature connected to the iron core to drive the iron core to move, thus closing the contactor.

[0003] Traditional electromagnetic systems employ a single-winding solenoid "I"-shaped electromagnetic structure. The magnetic attraction of this structure is limited by the diameter of the central solenoid, resulting in a short stroke of the moving iron core, making it unsuitable for applications with large current and long stroke. Utility Model Content

[0004] In view of this, this application provides a permanent magnet electromagnetic system and contactor to improve the problem that traditional electromagnetic systems cannot be applied to application scenarios with large moving iron core strokes.

[0005] The technical solution adopted in this application to solve the above-mentioned technical problems is as follows:

[0006] In a first aspect, embodiments of this application provide a permanent magnet electromagnetic system, comprising:

[0007] Static iron core;

[0008] Both coil windings are located on the stationary iron core;

[0009] The moving iron core is disposed opposite to the stationary iron core along a first direction; and

[0010] A magnetic drive assembly is connected to the moving iron core. The magnetic drive assembly and the stationary iron core are configured to generate a first magnetic field force. The first magnetic field force is used to drive the magnetic drive assembly to move toward the moving iron core to reset the moving iron core. The moving iron core and the stationary iron core are configured to generate a second magnetic field force. The stationary iron core and the coil winding are configured to generate a third magnetic field force.

[0011] The third magnetic force is opposite in direction to the first magnetic force, and the second magnetic force is opposite in direction to the first magnetic force.

[0012] In some embodiments of this application, when the coil winding is not energized, the magnetic drive assembly generates a first magnetic field force with the stationary iron core, so that the magnetic drive assembly contacts the stationary iron core under the action of the first magnetic field force.

[0013] When the coil winding is energized, the magnetic drive assembly and the stationary iron core generate the first magnetic field force, the stationary iron core generates the third magnetic field force that cancels out at least a portion of the first magnetic field force, and the stationary iron core and the moving iron core generate the second magnetic field force, so that the moving iron core moves toward the stationary iron core.

[0014] In some embodiments of this application, the magnetic drive assembly includes two magnetic drive modules disposed opposite to each other along a second direction. Along the second direction, one side of the stationary iron core is configured to contact one of the magnetic drive modules, and the other side is configured to contact the other magnetic drive module.

[0015] In some embodiments of this application, the magnetic drive module includes a mounting component and a permanent magnet. The mounting component is detachably connected to the moving iron core, and the permanent magnet is disposed on the mounting component and can generate the first magnetic field force with the stationary iron core.

[0016] In some embodiments of this application, the mounting component includes a plate and a guide rail. The guide rail is located on the side of the plate away from the stationary iron core and is used to slide in a sliding groove of the housing on which the permanent magnet electromagnetic system is mounted.

[0017] In some embodiments of this application, the plate body is provided with a mounting groove and a mounting through hole, the mounting groove and the mounting through hole are spaced apart along the first direction, the permanent magnet is disposed in the mounting groove, and the moving iron core is inserted into the mounting through hole along one side of the second direction.

[0018] In some embodiments of this application, an elastic abutment is provided in the mounting through hole. The elastic abutment is connected to the inner wall of one side of the mounting through hole in the first direction and is disposed opposite to the inner wall of the other side to define a mounting sub-through hole. One side of the moving iron core is inserted into the mounting sub-through hole, and the elastic abutment is deformed toward the side away from the moving iron core by the compression of the moving iron core.

[0019] In some embodiments of this application, the magnetic drive module further includes a first magnetic conductor, which is disposed on the mounting member and in contact with the permanent magnet. The first magnetic conductor is configured on one side of the first direction to generate a first magnetic field force with the stationary iron core.

[0020] In some embodiments of this application, the first magnetic conductor has a contact protrusion on one side in the first direction, and the contact protrusion is configured to generate a first magnetic field force with the stationary iron core.

[0021] In some embodiments of this application, the magnetic drive module further includes a second magnetic conductor disposed on the mounting component, the second magnetic conductor being disposed on the side of the permanent magnet away from the first magnetic conductor.

[0022] In some embodiments of this application, the stationary iron core includes a first magnetic flux plate, two magnetic flux pillars, and two second magnetic flux plates. The two magnetic flux pillars are spaced apart on the first magnetic flux plate along a second direction. The two second magnetic flux plates are respectively disposed on the side of the two magnetic flux pillars away from the first magnetic flux plate. The coil winding is disposed on the magnetic flux pillars. The second magnetic flux plates are configured to generate the first magnetic field force with the magnetic drive assembly and to generate the second magnetic field force with the moving iron core.

[0023] In some embodiments of this application, the second magnetic flux plate includes a first magnetic flux portion, a second magnetic flux portion, and a magnetic flux bending portion. The first magnetic flux portion and the second magnetic flux portion are connected through the magnetic flux bending portion. The first magnetic flux portion is connected to the magnetic flux post. The side of the second magnetic flux portion away from the magnetic flux bending portion is disposed opposite to the magnetically driven assembly, so that the second magnetic flux portion and the magnetically driven assembly are configured to generate a first magnetic field force.

[0024] In some embodiments of this application, the magnetic flux bending portion is an L-shaped portion with rounded corners, and at least the bending portion of the magnetic flux bending portion has a through groove.

[0025] In some embodiments of this application, the contactor further includes:

[0026] The housing contains the permanent magnet electromagnetic system, and the magnetic drive assembly is slidably connected to the inner wall of the housing.

[0027] The contact support is detachably connected to the moving iron core and is configured to move synchronously with the moving iron core.

[0028] A reset element is disposed inside the housing and connected to the side of the magnetic drive assembly away from the moving iron core, for providing a reset force to reset the moving iron core, the reset force being in the same direction as the first magnetic field force.

[0029] Secondly, embodiments of this application provide a contactor including a permanent magnet electromagnetic system as described in the first aspect.

[0030] In summary, due to the adoption of the above technical solution, this application includes at least the following beneficial effects:

[0031] The embodiments of this application provide a permanent magnet electromagnetic system and a contactor. This permanent magnet electromagnetic system firstly increases the magnetic attraction between the moving and stationary iron cores by setting two coil windings, thereby increasing the travel distance of the moving iron core. Secondly, it utilizes the first magnetic field force generated between the stationary iron core and the magnetic drive assembly, and the magnetic drive assembly can drive the moving iron core to move synchronously, so that the magnetic drive assembly can be subjected to the magnetic attraction of the stationary iron core, enabling the magnetic drive assembly to drive the moving iron core to perform a reset movement. When the coil windings are subsequently energized, the third magnetic field force generated by the stationary iron core cancels out at least a portion of the first magnetic field force, thereby reducing the resistance that the second magnetic field force, which acts as an attraction between the stationary iron core and the moving iron core, needs to overcome, such as the first magnetic field force, thus further increasing the travel distance of the moving iron core. Attached Figure Description

[0032] Figure 1 A schematic diagram of the structure of a contactor provided for an embodiment of this application;

[0033] Figure 2 for Figure 1 An explosion diagram;

[0034] Figure 3 A schematic diagram of a permanent magnet electromagnetic system provided for an embodiment of this application;

[0035] Figure 4 for Figure 3 A schematic diagram of the exploded structure;

[0036] Figure 5 A schematic diagram of the structure of a magnetically driven component in a permanent magnet electromagnetic system provided for an embodiment of this application;

[0037] Figure 6 for Figure 5 An explosion diagram;

[0038] Figure 7 A schematic diagram of the structure of a static iron core in a permanent magnet electromagnetic system provided for embodiments of this application;

[0039] Figure 8 for Figure 7 A schematic diagram of the structure of the second magnetic flux plate in the provided stationary iron core;

[0040] Figure 9 This is a schematic diagram of the structure of a buffer in a permanent magnet electromagnetic system provided for an embodiment of this application.

[0041] Explanation of reference numerals in the attached figures:

[0042] 1. Stationary iron core; 11. First magnetic flux plate; 12. Second magnetic flux plate; 121. First magnetic flux section; 122. Second magnetic flux section; 123. Bending magnetic flux section; 1231. Through slot; 13. Magnetic flux column; 2. Coil winding; 3. Moving iron core; 4. Contact support; 5. Magnetic drive assembly; 51. Mounting component; 511. Mounting slot; 512. Mounting through hole; 513. Locking slot; 514. Contact hole; 515. Elastic abutment component; 516. Plate body; 517. Guide rail; 52. Permanent magnet; 53. First magnetic conductor; 531. Contact protrusion; 54. Second magnetic conductor; 541. Locking protrusion; 6. Buffer component; 61. Guide bar; 7. Housing; 8. Reset component.

[0043] Z, first direction; Y, second direction. Detailed Implementation

[0044] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0045] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0046] In this application, the term "exemplary" is used to mean "used as an example, illustration, or illustration." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments.

[0047] Please see Figure 1 and Figure 2 This application provides a contactor, which is a permanent magnet DC contactor, including a housing 7, a permanent magnet electromagnetic system, a contact support 4, and a reset member 8. The permanent magnet electromagnetic system is disposed within the housing 7, and some components of the permanent magnet electromagnetic system are movable within the housing 7 to realize the contactor's power-on / off control of external devices. The contact support 4 is detachably connected to the moving iron core 3 and is configured to move synchronously with the moving iron core 3. The reset member 8 is disposed within the housing 7 and connected to the side of the magnetic drive assembly 5 away from the moving iron core 3, and is used to provide a reset force to reset the moving iron core 3, the reset force being in the same direction as the first magnetic field force.

[0048] In some embodiments, see Figure 3 and Figure 4The permanent magnet electromagnetic system includes a stationary iron core 1, two coil windings 2, a moving iron core 3, and a magnetic drive assembly 5. Both coil windings 2 are located on the stationary iron core 1. The moving iron core 3 is positioned opposite the stationary iron core 1 along a first direction Z. A contact support 4 is connected to the moving iron core 3, and the magnetic drive assembly 5 is also connected to the moving iron core 3. The magnetic drive assembly 5, the moving iron core 3, and the contact support 4 are configured to move synchronously. A first magnetic field force is generated between the magnetic drive assembly 5 and the stationary iron core 1; a second magnetic field force is generated between the moving iron core 3 and the stationary iron core 1; and a third magnetic field force is generated between the stationary iron core 1 and the coil windings 2. A reset member 8 is located on the side of the magnetic drive assembly 5 away from the contact support 4, applying a reset force towards the moving iron core 3 to the magnetic drive assembly 5. The first magnetic field force is in the same direction as the reset force, the third magnetic field force is opposite to the first magnetic field force, and the second magnetic field force is opposite to the first magnetic field force.

[0049] The technical solution of this application improves the magnetic attraction between the stationary and moving iron cores 1 by setting two coil windings 2, thereby increasing the travel of the moving iron core 3. Secondly, it utilizes the first magnetic field force generated between the stationary iron core 1 and the magnetic drive assembly 5, and the magnetic drive assembly 5 can drive the moving iron core 3 to move synchronously, so that the magnetic drive assembly 5 can be attracted by the magnetic force of the stationary iron core 1, and the magnetic drive assembly 5 can drive the moving iron core 3 to perform a reset movement. When the coil winding 2 is energized in the future, the third magnetic field force generated by the stationary iron core 1 cancels at least part of the first magnetic field force, so that the second magnetic field force that the stationary iron core 1 attracts the moving iron core 3 can reduce the resistance that needs to be overcome, such as the first magnetic field force, thereby further increasing the travel of the moving iron core 3.

[0050] It should be noted that the first magnetic field force is generated by the permanent magnet 52 in the magnetic drive assembly 5 magnetizing the stationary iron core 1, creating a magnetic field between the permanent magnet 52 and the stationary iron core 1, which in turn generates the first magnetic field force. This first magnetic field force is in the same direction as the force applied by the reset member 8 to reset the moving iron core 3, thus assisting the reset member 8 in resetting the moving iron core 3. Of course, if the first magnetic field force is large enough, it can directly replace the reset member 8. However, it is necessary to ensure that after the coil winding 2 is energized, if the first magnetic field force is greater than the second magnetic field force, the second magnetic field force must be greater than the difference between the two forces. This is to avoid the second magnetic field force being insufficient to drive the moving iron core 3 towards the stationary iron core 1 due to an excessively large first magnetic field force. If the first magnetic field force is small and only serves as an auxiliary reset, the number of reset members 8 can be increased to ensure successful reset of the moving iron core. The additional reset members 8 can be placed on the side of the contact support facing the housing 7 to further provide reset force for the moving iron core. Compared with traditional electromagnetic systems, this solution can effectively reduce the reset force required by the reset component 8. When the coil winding 2 is energized and the stationary iron core 1 attracts the moving iron core 3 under the action of the second magnetic field, the reset force that the moving iron core 3 needs to overcome by the reset component 8 is smaller than that of the traditional reset force, thereby increasing the travel of the moving iron core 3.

[0051] Furthermore, the first magnetic force and the third magnetic force are equal and opposite, so that after the subsequent coil winding 2 is energized, the third magnetic force generated by the stationary iron core 1 itself can effectively counteract the first magnetic force, avoid the first magnetic force forming resistance that hinders the movement of the moving iron core 3 toward the stationary iron core 1, and increase the movement stroke of the moving iron core 3.

[0052] In some embodiments, when the coil winding 2 is not energized, the magnetic drive assembly 5 generates a first magnetic field force with the stationary iron core 1, causing the magnetic drive assembly 5 to contact the stationary iron core 1 under the action of the first magnetic field force, or the reset member 8 applies a reset force to the magnetic drive assembly 5, causing the magnetic drive assembly 5 to contact the stationary iron core 1 under the combined action of the first magnetic field force and the reset force, depending on the magnitude of the first magnetic field force. In this embodiment, the reset force of the reset member 8 and the first magnetic field force work together. Because of the assistance of the first magnetic field force, the reset force of the reset member 8 can be reduced. For example, if the reset member 8 is a spring, the elasticity of the spring can be reduced.

[0053] When the coil winding 2 is energized, the magnetic drive assembly 5 generates a first magnetic field force with the stationary iron core 1. The stationary iron core 1 generates a third magnetic field force to counteract the first magnetic field force, and a second magnetic field force is generated between the stationary iron core 1 and the moving iron core 3, causing the moving iron core 3 to move towards the stationary iron core 1. By utilizing the third magnetic field force to at least partially counteract the first magnetic field force, preferably with the first and third magnetic field forces being equal in magnitude, the first magnetic field force is completely counteracted, preventing it from hindering the stationary iron core 1 from attracting the moving iron core 3. Furthermore, because the elasticity of the reset member 8 is reduced, the resistance of the reset member 8 to the movement of the moving iron core 3 towards the stationary iron core 1 is also reduced, which in turn helps to increase the stroke of the stationary iron core 1 attracting the moving iron core 3, adapting to situations with large current and large stroke.

[0054] In some embodiments, see Figure 5 and Figure 6 The magnetic drive assembly 5 includes two magnetic drive modules arranged opposite each other along a second direction Y, which is perpendicular to the first direction Z. Along the second direction Y, one side of the stationary iron core 1 is configured to contact one of the magnetic drive modules, and the other side is configured to contact the other magnetic drive module. It should be noted that "one side" and "the other side" of the stationary iron core 1 refer to the side of the stationary iron core 1 facing the magnetic drive module on one side and the other side of the second direction Y. By aligning the contact surface of the stationary iron core 1 with the magnetic drive module, a first magnetic field force is generated. Under the action of the reset member 8, the stationary iron core 1 can contact the magnetic drive module. As the distance between the contact surface and the magnetic drive module gradually decreases, the first magnetic field force gradually increases, improving the contact tightness between the stationary iron core 1 and the magnetic drive module, and also relatively reducing the reset force required by the reset member 8.

[0055] Furthermore, the magnetic drive module includes a mounting component 51 and a permanent magnet 52. The mounting component 51 is detachably connected to the moving iron core 3, and the permanent magnet 52 is disposed on the mounting component 51 and can generate a first magnetic field force with the stationary iron core 1. Exemplarily, the mounting component 51 includes a plate 516 and a guide rail 517. The guide rail 517 is disposed on the side of the plate away from the stationary iron core 1, and the guide rail 517 is used to slide in a sliding groove of the housing 7 that mounts the permanent magnet electromagnetic system, so that the movement of the mounting component 51 in the first direction Z is more stable and smooth. A mounting groove 511 and a mounting through hole 512 are provided on the plate 516. Mounting grooves 511 and mounting through holes 512 are spaced apart along the first direction Z. A permanent magnet 52 is disposed within the mounting groove 511. The mounting through holes 512 of the two mounting components 51 are aligned. The moving iron core 3 is inserted into the corresponding mounting through holes 512 on both sides of the second direction Y, allowing the moving iron core 3 and the mounting components 51 to be detachably fixed and ensuring synchronous movement of the moving iron core 3 and the mounting components 51. The contact support 4 is threadedly connected to the moving iron core 3 on the side facing it. Correspondingly, the contact support 4 has a clearance on the side facing the moving iron core 3 to avoid the female head of the bolt. The contact support 4 and the moving iron core 3 can move synchronously.

[0056] Furthermore, an elastic abutment 515 is provided within the mounting through hole. The elastic abutment 515 is connected to the inner wall of the mounting through hole 512 on one side in the first direction Z, and is positioned opposite to the inner wall on the other side to define the mounting sub-through hole. One side of the moving iron core 3 is inserted into the mounting sub-through hole, and the elastic abutment 515 deforms towards the side away from the moving iron core 3 under the pressure of the moving iron core 3. By utilizing the elastic properties of the elastic abutment 515, when the moving iron core 3 is inserted into the mounting sub-through hole, it will compress the elastic abutment 515, causing the elastic abutment 515 to deform in the first direction Z, and forming a reverse force on the moving iron core 3, thus securing the moving iron core 3 within the mounting sub-through hole.

[0057] Furthermore, please see Figure 9 A buffer element 6 is also provided on the moving iron core 3. The buffer element 6 has at least two opposing guide bars 61. The contact support element 4 is positioned between the two guide bars 61 on the side facing the moving iron core 3 to serve as the installation and positioning function of the contact support element 4. Then, the contact support element 4 is fixedly connected to the moving iron core 3 by bolts so that the contact support element 4 and the moving iron core 3 move synchronously. A part of the buffer element 6 is located in the clearance position to cover the bolt and shield the bolt head. Because the buffer element 6 is made of soft material, it can deform under force while providing a buffering function. When it is necessary to tighten or loosen the bolt, the operator only needs to remove the part of the buffer element 6 covering the bolt to operate on the bolt, which is both aesthetically pleasing and does not affect normal disassembly and assembly.

[0058] An installation groove 511 is provided in the mounting component 51, and a permanent magnet 52 is disposed in the installation groove 511, with one side of the permanent magnet 52 facing the side of the stationary iron core 1 so that the contact surface of the stationary iron core 1 can be magnetized, thereby generating a first magnetic field force between the stationary iron core 1 and the permanent magnet 52.

[0059] In some embodiments, see Figure 5 and Figure 6 The magnetic drive module also includes a first magnetic conductor 53. The first magnetic conductor 53 is disposed on the mounting member 51 and contacts the permanent magnet 52. The first magnetic conductor 53 is configured on one side in the first direction Z to generate a first magnetic field force with the stationary iron core 1. Exemplarily, the first magnetic conductor 53 is disposed in the mounting groove 511, so that the first magnetic conductor 53 contacts the permanent magnet 52. The magnetic flux of the permanent magnet 52 can be conducted through the first magnetic conductor 53 and form a magnetic field with the stationary iron core 1, generating the first magnetic field force.

[0060] In some embodiments, the magnetic drive module further includes a second magnetic conductor 54 disposed on the mounting bracket. The second magnetic conductor 54 is located on the side of the permanent magnet 52 away from the first magnetic conductor 53, further increasing the magnetic flux. For example, by providing the second magnetic conductor 54, the magnetic flux of the permanent magnet 52 can be conducted by the second magnetic conductor 54, thereby increasing the magnetic flux conducted solely by the first magnetic conductor 53 and enhancing the first magnetic field force.

[0061] In some embodiments, the first magnetic conductor 53, the permanent magnet 52, and the second magnetic conductor 54 are stacked in the mounting groove 511 so that the first magnetic conductor 53, the second magnetic conductor 54, and the permanent magnet 52 are in contact, with the permanent magnet 52 located between the first magnetic conductor 53 and the second magnetic conductor 54. A locking groove 513 is further formed on the inner sidewalls of both sides of the mounting groove 511. Correspondingly, locking protrusions 541 are further formed on both sides of the first magnetic conductor 53 and the second magnetic conductor 54. The locking protrusions 541 engage with the locking grooves 513 to fix the first magnetic conductor 53 and the second magnetic conductor 54 within the mounting groove 511. The permanent magnet 52 can also have locking protrusions 541 on both sides located between the two magnetic conductors, or it can be directly placed between the two magnetic conductors. In this embodiment, the permanent magnet 52 is directly placed between the two magnetic conductors, which simplifies the structure of the permanent magnet 52.

[0062] Furthermore, a contact hole 514 is provided on the side of the mounting member 51 facing the contact surface of the stationary iron core 1. The side of the first magnetic conductor 53 facing the contact surface of the stationary iron core 1 extends through the contact hole 514 to the outside of the mounting member 51, so that the contact surface of the first magnetic conductor 53 and the contact surface of the stationary iron core 1 can be positioned opposite each other and generate a first magnetic field force. Under the action of the first magnetic field force and the reset force, the contact surface of the stationary iron core 1 can be made to contact the first magnetic conductor 53.

[0063] Furthermore, the first magnetic conductor 53 has a contact protrusion 531 on one side of its contact surface in the first direction Z and facing the stationary iron core 1. The contact protrusion 531 is configured to generate a first magnetic field force with the stationary iron core 1. The contact protrusion 531 passes through the contact hole 514, and its area is smaller than that of the flat side surface of the first magnetic conductor 53. This facilitates the formation of a direct magnetic field between the first magnetic conductor 53 and the stationary iron core 1 and prevents the first magnetic field force from being too large, which would affect the subsequent process of the second magnetic field force attracting the moving iron core 3.

[0064] In some embodiments, see Figure 7 The stationary iron core 1 includes a first magnetic flux plate 11, two magnetic flux pillars 13, and two second magnetic flux plates 12. The two magnetic flux pillars 13 are spaced apart on the first magnetic flux plate 11 along a second direction Y. The two second magnetic flux plates 12 are respectively located on the side of the two magnetic flux pillars 13 away from the first magnetic flux plate 11. The coil winding 2 is located on the magnetic flux pillars 13. The second magnetic flux plates 12 are configured to generate a first magnetic field force with the magnetic drive assembly 5 and a second magnetic field force with the moving iron core 3. By setting two magnetic flux pillars 13 on the first magnetic flux plate 11, the two coil windings 2 can be wound on the magnetic flux pillars 13. A second magnetic flux plate 12 is set on the side of each magnetic flux pillar 13 away from the first magnetic flux plate 11. The two second magnetic flux plates 12 have opposite polarities, so that the stationary iron core 1 can form a magnetic flux loop with the cooperation of the coil windings 2 and the moving iron core 3. When the coil winding 2 is energized, a magnetic field is formed between the coil winding 2 and the second magnetic flux plate 12, generating a third magnetic force. This third magnetic force is opposite in direction to the first magnetic force, thus counteracting the first magnetic force and reducing the resistance that the second magnetic force needs to overcome to attract the moving iron core 3 towards the stationary iron core 1. In addition to generating the third magnetic force, energizing the coil winding 2 also generates a magnetic field between the second magnetic flux plate 12 and the moving iron core 3. That is, energizing the coil winding 2 generates two magnetic fields: one to attract the moving iron core 3 and the other to reduce the resistance formed by the first magnetic force on the movement of the moving iron core 3. Both second magnetic flux plates 12 attract the moving iron core 3, thereby increasing the attraction force and enabling the electromagnetic system to adapt to the requirements of high current and the long stroke of the moving iron core 3.

[0065] Further, please see Figure 8The second magnetic flux plate 12 includes a first magnetic flux section 121, a second magnetic flux section 122, and a magnetic flux bending section. The first magnetic flux section 121 and the second magnetic flux section 122 are connected through the magnetic flux bending section. The first magnetic flux section 121 is connected to the magnetic flux post 13. The side of the second magnetic flux section 122 away from the magnetic flux bending section is disposed opposite to the magnetically guided drive assembly 5, so that the second magnetic flux section 122 and the magnetically guided drive assembly 5 are configured to generate a first magnetic field force. By bending the second magnetic flux plate 12, it can be connected to the magnetic flux post 13 in one plane to ensure that the stationary iron core 1, the coil, and the moving iron core 3 can form a magnetic field loop, and can also form a magnetic field with the magnetic drive assembly 5 in another plane to generate the first magnetic field force. The two planes are preferably perpendicular, which is equivalent to bending the second magnetic flux plate 12 by 90°, so that the second magnetic flux plate 12 forms two surfaces that can contact different magnetic components, ensuring that the direction of the first magnetic field force is the first direction Z, which facilitates the formation of a magnetic field and the generation of the first magnetic field force between the first magnetic conductor 53 and the second magnetic flux part 122 in the magnetic drive assembly 5.

[0066] Furthermore, the magnetic flux bend is L-shaped with rounded corners, which helps to prevent magnetic flux accumulation at the bend of the second magnetic flux plate 12 due to bending, thus improving the magnetic flux conduction effect. A through-slot 1231 is also provided at least in the bend portion of the magnetic flux bend. The through-slot 1231 is equivalent to adding an air gap in the magnetic circuit, increasing the magnetic reluctance in that region (the permeability of air is much lower than that of magnetically conductive materials). This forces the magnetic flux to redistribute, preventing local magnetic saturation caused by excessive concentration of magnetic field lines at the bend, thereby improving the overall efficiency of the magnetic circuit.

[0067] In summary, this application utilizes a stationary iron core 1 with two coil windings 2 to increase the magnetic force between the stationary iron core 1 and the moving iron core 3, thereby increasing the stroke of the moving iron core 3 and adapting to high current conditions. Furthermore, by using a permanent magnet 52 mounted on the mounting member 51 and movable with it, the permanent magnet 52 can generate a magnetic field with the stationary iron core 1 through a magnetic conductor, thus assisting the reset member 8 in resetting the moving iron core 3. This reduces the reset force required by the reset member 8, and during the process of the stationary iron core 1 attracting the moving iron core 3, the force that the reset member 8 needs to overcome is also smaller, effectively further increasing the force by which the stationary iron core 1 attracts the moving iron core 3, thereby increasing the travel stroke of the moving iron core 3.

[0068] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0069] Similarly, it should be noted that, in order to simplify the description of the embodiments of this application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of this application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of this application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

Claims

1. A permanent magnet electromagnetic system, characterized in that, include: Static iron core; Both coil windings are located on the stationary iron core; A moving iron core is disposed opposite to the stationary iron core along a first direction; as well as A magnetic drive assembly is connected to the moving iron core. The magnetic drive assembly and the stationary iron core are configured to generate a first magnetic field force. The first magnetic field force is used to drive the magnetic drive assembly to move toward the moving iron core to reset the moving iron core. The moving iron core and the stationary iron core are configured to generate a second magnetic field force. The stationary iron core and the coil winding are configured to generate a third magnetic field force. The third magnetic force is opposite in direction to the first magnetic force, and the second magnetic force is opposite in direction to the first magnetic force.

2. The permanent magnet electromagnetic system as described in claim 1, characterized in that, When the coil winding is not energized, the magnetic drive assembly generates a first magnetic field force with the stationary iron core, so that the magnetic drive assembly contacts the stationary iron core under the action of the first magnetic field force. When the coil winding is energized, the magnetic drive assembly and the stationary iron core generate the first magnetic field force, the stationary iron core generates the third magnetic field force that cancels out at least a portion of the first magnetic field force, and the stationary iron core and the moving iron core generate the second magnetic field force, so that the moving iron core moves toward the stationary iron core.

3. The permanent magnet electromagnetic system as described in claim 1, characterized in that, The magnetic drive assembly includes two magnetic drive modules disposed opposite to each other along a second direction. Along the second direction, one side of the stationary iron core is configured to contact one of the magnetic drive modules, and the other side is configured to contact the other magnetic drive module.

4. The permanent magnet electromagnetic system as described in claim 3, characterized in that, The magnetic drive module includes a mounting component and a permanent magnet. The mounting component is detachably connected to the moving iron core, and the permanent magnet is disposed on the mounting component and can generate the first magnetic field force with the stationary iron core.

5. The permanent magnet electromagnetic system as described in claim 4, characterized in that, The mounting component includes a plate and a guide rail. The guide rail is located on the side of the plate away from the stationary iron core and is used to slide in a sliding groove of the housing on which the permanent magnet electromagnetic system is mounted.

6. The permanent magnet electromagnetic system as described in claim 5, characterized in that, The plate has an installation groove and an installation through hole. The installation groove and the installation through hole are spaced apart along the first direction. The permanent magnet is disposed in the installation groove, and the moving iron core is inserted into the installation through hole along one side of the second direction.

7. The permanent magnet electromagnetic system as described in claim 6, characterized in that, An elastic abutment is provided in the mounting through hole. The elastic abutment is connected to the inner wall of the mounting through hole on one side in the first direction and is disposed opposite to the inner wall on the other side to define the mounting sub-through hole. One side of the moving iron core is inserted into the mounting sub-through hole, and the elastic abutment is deformed toward the side away from the moving iron core by the compression of the moving iron core.

8. The permanent magnet electromagnetic system as described in claim 4, characterized in that, The magnetic drive module further includes a first magnetic conductor, which is disposed on the mounting component and in contact with the permanent magnet. The first magnetic conductor is configured on one side of the first direction to generate a first magnetic field force with the stationary iron core.

9. The permanent magnet electromagnetic system as described in claim 8, characterized in that, The first magnetic conductor has a contact protrusion on one side in the first direction, and the contact protrusion is configured to generate a first magnetic field force with the stationary iron core.

10. The permanent magnet electromagnetic system as described in claim 9, characterized in that, The magnetic drive module further includes a second magnetic conductor disposed on the mounting component, the second magnetic conductor being disposed on the side of the permanent magnet away from the first magnetic conductor.

11. The permanent magnet electromagnetic system as described in claim 1, characterized in that, The stationary iron core includes a first magnetic flux plate, two magnetic flux pillars, and two second magnetic flux plates. The two magnetic flux pillars are spaced apart on the first magnetic flux plate along a second direction. The two second magnetic flux plates are respectively located on the side of the two magnetic flux pillars away from the first magnetic flux plate. The coil winding is located on the magnetic flux pillars. The second magnetic flux plates are configured to generate the first magnetic field force with the magnetic drive assembly and the second magnetic field force with the moving iron core.

12. The permanent magnet electromagnetic system as described in claim 11, characterized in that, The second magnetic flux plate includes a first magnetic flux section, a second magnetic flux section, and a magnetic flux bending section. The first magnetic flux section and the second magnetic flux section are connected through the magnetic flux bending section. The first magnetic flux section is connected to the magnetic flux column. The side of the second magnetic flux section away from the magnetic flux bending section is disposed opposite to the magnetically guided drive assembly, so that the second magnetic flux section and the magnetically guided drive assembly are configured to generate a first magnetic field force.

13. The permanent magnet electromagnetic system as described in claim 12, characterized in that, The magnetic flux bending section is L-shaped with rounded corners, and at least the bending portion of the magnetic flux bending section has a through groove.

14. A contactor, characterized in that, include: The permanent magnet electromagnetic system as described in any one of claims 1 to 13.

15. The contactor as claimed in claim 14, characterized in that, The contactor also includes: The housing contains the permanent magnet electromagnetic system, and the magnetic drive assembly is slidably connected to the inner wall of the housing. The contact support is detachably connected to the moving iron core and is configured to move synchronously with the moving iron core. A reset element is disposed inside the housing and connected to the side of the magnetic drive assembly away from the moving iron core, for providing a reset force to reset the moving iron core, the reset force being in the same direction as the first magnetic field force.

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