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, a contact supporting piece, a reset piece 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 in the first direction, the contact supporting piece is connected with the movable iron core, and the magnetic conduction driving assembly is connected with the contact supporting piece. A first magnetic field force is generated between the magnetic conduction driving assembly and the static iron core, a second magnetic field force is generated between the movable iron core and the static iron core, and a third magnetic field force is generated between the static iron core and the coil winding. The reset piece is arranged on the side, away from the contact supporting piece, of the magnetic conduction driving assembly and exerts reset force in the direction of the movable iron core on the magnetic conduction driving assembly. The first magnetic field force is the same as the reset direction, 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] A moving iron core is disposed opposite to the stationary iron core along a first direction;

[0010] The contact support is connected to the moving iron core;

[0011] A magnetic drive assembly is connected to the contact support. The magnetic drive assembly, the moving iron core, and the contact support are configured to move synchronously. A first magnetic field force is generated between the magnetic drive assembly and the stationary iron core; a second magnetic field force is generated between the moving iron core and the stationary iron core; and a third magnetic field force is generated between the stationary iron core and the coil winding.

[0012] A reset member is disposed on the side of the magnetic drive assembly away from the contact support member, and applies a reset force to the magnetic drive assembly toward the moving iron core;

[0013] Wherein, the first magnetic force is in the same direction as the reset force, the third magnetic force is in the opposite direction to the first magnetic force, and the second magnetic force is in the opposite direction to the first magnetic force.

[0014] 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, and the reset member applies a reset force to the magnetic drive assembly so that the magnetic drive assembly contacts the stationary iron core under the action of the first magnetic field force and the reset force.

[0015] 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 to counteract the first magnetic field force, and the stationary iron core and the moving iron core generate the second magnetic field force to make the moving iron core move toward the stationary iron core.

[0016] 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.

[0017] 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 contact support component, and the permanent magnet is disposed on the mounting component and can generate the first magnetic field force with the stationary iron core.

[0018] In some embodiments of this application, the number of permanent magnets is two, the two permanent magnets are arranged opposite each other along a third direction, and the two permanent magnets are respectively arranged close to the two coil windings.

[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 is configured such that the side that generates the first magnetic field force with the stationary iron core has a chamfer.

[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 in contact with the side of the two permanent magnets 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 wound 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 and a second magnetic flux portion, the first magnetic flux portion and the second magnetic flux portion are spaced apart, the first magnetic flux portion is connected to the magnetic flux column and is configured to generate the second magnetic field force with the moving iron core, and the second magnetic flux portion is configured to generate the first magnetic field force with the magnetic drive assembly.

[0024] Secondly, embodiments of this application provide a contactor, including:

[0025] case;

[0026] As described in the first aspect, the permanent magnet electromagnetic system is disposed within the housing, and the magnetic drive assembly is slidably connected to the inner wall of the housing.

[0027] In summary, due to the adoption of the above technical solution, this application includes at least the following beneficial effects:

[0028] This application provides a permanent magnet electromagnetic system and contactor. The 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 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. The first magnetic field force is in the same direction as the reset force, so that when the moving iron core is reset using a reset member, the magnetic drive assembly is 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. The magnetic drive component plays an auxiliary role in reset, which helps to reduce the reset force required by the reset component. In other words, a reset component with a smaller reset force can be used. Furthermore, while the stationary iron core generates a second magnetic field force with the moving iron core, it also generates a third magnetic field force in the opposite direction to the first magnetic field force. This third magnetic field force can cancel out the first magnetic field force. As a result, when the stationary iron core attracts the moving iron core and moves towards the stationary iron core under the action of the second magnetic field force, it basically only needs to overcome a smaller reset force compared to the reset force required by traditional contactors, thereby further increasing the movement stroke of the moving iron core. Attached Figure Description

[0029] Figure 1 A schematic diagram of the structure of a contactor provided for an embodiment of this application;

[0030] Figure 2 for Figure 1 An explosion diagram;

[0031] Figure 3 A schematic diagram of a permanent magnet electromagnetic system provided for an embodiment of this application;

[0032] Figure 4 for Figure 3 A schematic diagram of the exploded structure;

[0033] 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;

[0034] Figure 6 for Figure 5 An explosion diagram;

[0035] 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;

[0036] Figure 8 A schematic diagram of another static iron core in a permanent magnet electromagnetic system provided for embodiments of this application.

[0037] 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.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Stationary iron core; 11. First magnetic flux plate; 12. Second magnetic flux plate; 121. First magnetic flux section; 122. Second magnetic flux section; 13. Magnetic flux column; 2. Coil winding; 3. Moving iron core; 4. Contact support; 41. Insertion post; 42. Snap-fit ​​platform; 5. Magnetic drive assembly; 51. Mounting component; 511. Insertion hole; 512. First snap-fit; 52. Permanent magnet; 521. Mounting groove; 522. Cavity; 523. Protrusion; 524. Limiting protrusion; 525. Second snap-fit; 53. First magnetic conductor; 531. Chamfer; 54. Second magnetic conductor; 6. Buffer component; 61. Guide strip; 7. Housing; 8. Reset component;

[0040] Z, first direction; Y, second direction; X, third direction. Detailed Implementation

[0041] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0042] 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.

[0043] 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.

[0044] Please see Figure 1 and Figure 2 This application provides a contactor, which is a permanent magnet DC contactor, including a housing 7 and a permanent magnet electromagnetic system. The permanent magnet electromagnetic system is disposed within the housing 7, and some components of the permanent magnet electromagnetic system can move within the housing 7 to realize the contactor's power control over external devices.

[0045] In some embodiments, see Figure 3 and Figure 4 The permanent magnet electromagnetic system includes a stationary iron core 1, two coil windings 2, a moving iron core 3, a contact support 4, a reset component 8, 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. The contact support 4 is connected to the moving iron core 3, and the magnetic drive assembly 5 is connected to the contact support 4. 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. The reset component 8 is located on the side of the magnetic drive assembly 5 away from the contact support 4 and applies a reset force towards the moving iron core 3. 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.

[0046] The technical solution of this application increases the magnetic attraction between the moving and stationary 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. Since the first magnetic field force is in the same direction as the reset force, when the moving iron core 3 is reset using the reset member 8, the magnetic drive assembly 5 is subjected to the magnetic attraction of the stationary iron core 1, enabling the magnetic drive assembly 5 to drive the moving iron core 3 to perform a reset movement. The magnetic drive assembly 5 plays an auxiliary role in the reset process. The auxiliary effect helps to reduce the reset force required by the reset element 8, that is, a reset element 8 with a smaller reset force can be used. In addition, while the stationary iron core 1 generates a second magnetic field force with the moving iron core 3, it also generates a third magnetic field force in the opposite direction to the first magnetic field force. This allows the third magnetic field force to cancel the first magnetic field force. As a result, when the stationary iron core 1 attracts the moving iron core 3 and the moving iron core 3 moves toward the stationary iron core 1 under the action of the second magnetic field force, it basically only needs to overcome a smaller reset force than that required by the traditional contactor, thereby further increasing the movement stroke of the moving iron core 3.

[0047] 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, so that a magnetic field is generated between the permanent magnet 52 and the stationary iron core 1, which in turn generates the first magnetic field force. The 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, thereby assisting the reset member 8 to reset the moving iron core 3. Compared with the traditional electromagnetic system, it can effectively reduce the reset force required by the reset member 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 force, the reset force that the moving iron core 3 needs to overcome by the reset member 8 is smaller than the traditional reset force, thereby increasing the movement stroke of the moving iron core 3.

[0048] 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.

[0049] 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, and the reset member 8 applies a reset force to the magnetic drive assembly 5 so that the magnetic drive assembly 5 contacts the stationary iron core 1 under the action of the first magnetic field force and the reset force. 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 elastic performance of the spring can be reduced.

[0050] 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.

[0051] 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.

[0052] Furthermore, the magnetic drive module includes a mounting component 51 and a permanent magnet 52. The mounting component 51 is detachably connected to the contact support component 4, 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 has a insertion hole 511 and two first latches 512 on the side facing the contact support component 4, with the insertion hole 511 located between the two first latches 512. The contact support component 4 has a latching platform 42 and a insertion post 41 on the side facing the mounting component 51. The insertion post 41 is disposed on the side of the latching platform 42 facing the mounting component 51. By inserting the insertion post 41 into the insertion hole 511, the side of the latching platform 42 facing the mounting component 51 abuts against the plane of the insertion hole 511, and the side facing away from the mounting component 51 engages with the first latches 512, thereby realizing the detachable connection between the mounting component 51 and the contact support component 4, enabling the mounting component 51 and the contact support component 4 to move synchronously.

[0053] An installation groove 521 is provided in the mounting component 51, and a permanent magnet 52 is disposed in the installation groove 521, 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.

[0054] Furthermore, the mounting groove 521 includes two cavities 522, and the inner walls of the two cavities 522 on the side closest to each other are provided with anti-foolproof chamfers 531. Correspondingly, the permanent magnet 52 is provided with a permanent magnet chamfer 531 so that the permanent magnet 52 can only be installed according to the shape of the cavity 522, avoiding incorrect installation of the permanent magnet 52, and because of the presence of the anti-foolproof chamfer 531, the two permanent magnets 52 can always maintain opposite magnetic properties after installation.

[0055] In some embodiments, two permanent magnets 52 are arranged opposite each other along a third direction X, and the two permanent magnets 52 are respectively arranged close to the two coil windings 2, so that the two permanent magnets 52 can respectively form a magnetic field with the corresponding coil windings 2 at the position corresponding to the stationary iron core 1, which is beneficial to shorten the distance between the permanent magnets 52 and the stationary iron core 1 to form a magnetic field and improve the magnetic field force.

[0056] 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, two first magnetic conductors 53 are respectively disposed in two cavities 522, each first magnetic conductor 53 contacting one permanent magnet 52, allowing the magnetic flux of the permanent magnet 52 to be conducted through the first magnetic conductor 53 and form a magnetic field with the stationary iron core 1, generating a first magnetic field force. A protrusion 523 is provided on at least one side wall of the cavity 522, the protrusion 523 contacting one side of the first magnetic conductor 53 to restrict the movement of the first magnetic conductor 53 in the second direction Y. Preferably, the protrusion 523 is also located on the side of the permanent magnet 52 in the third direction X, and the permanent magnet 52 contacts the protrusion 523 to restrict the movement of the permanent magnet 52 in the third direction X.

[0057] Furthermore, the first magnetic conductor 53 is configured such that the side that generates the first magnetic field force with the stationary iron core 1 has a chamfer 531, which can increase the magnetic flux while effectively preventing the magnetic flux from accumulating.

[0058] In some embodiments, the magnetic drive module further includes a second magnetic conductor 54 disposed on the mounting member 51. The second magnetic conductor 54 contacts the side of the two permanent magnets 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 both permanent magnets 52 can be conducted by the second magnetic conductor 54, thereby increasing the magnetic flux that the two first magnetic conductors 53 can conduct independently, and improving the first magnetic field force.

[0059] Furthermore, along the first direction Z, limiting protrusions 524 and second buckles 525 are respectively provided on the inner walls of both sides of the mounting groove 521. The second magnetic conductor 54 is installed into the mounting groove 521 by pressing, and the limiting protrusions 524 and the second buckles 525 fix the second magnetic conductor 54.

[0060] 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 the 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 wound 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. A U-shaped stationary iron core 1 structure is formed by the first magnetic flux plate 11, two magnetic flux pillars 13, and two second magnetic flux plates 12. Each coil winding 2 is wound with a corresponding magnetic flux pillar 13 and is located between the first magnetic flux plate 11 and one of the second magnetic flux plates 12. When the coil winding 2 is energized, the first magnetic flux plate 11, the two magnetic flux pillars 13, the two second magnetic flux plates 12, and the moving iron core 3 can jointly form a magnetic field. Compared with the traditional single-coil electromagnetic system, the two coil windings 2 have a larger magnetic flux, which can improve the magnetic attraction between the stationary iron core 1 and the moving iron core 3, thereby increasing the movement stroke of the moving iron core 3 and adapting to the situation of large current and large stroke.

[0061] Further, please see Figure 8 The second magnetic flux plate 12 includes a first magnetic flux section 121 and a second magnetic flux section 122. The first magnetic flux section 121 and the second magnetic flux section 122 are spaced apart. The first magnetic flux section 121 is connected to the magnetic flux post 13 and is configured to generate a second magnetic field force with the moving iron core 3. The second magnetic flux section 122 is configured to generate a first magnetic field force with the magnetically driven assembly 5. By isolating the first magnetic flux section 121, which generates the second and third magnetic field forces, from the second magnetic flux section 122, which generates the first magnetic field force, it is effectively prevented that when the current flowing through the coil winding 2 is too large, the first magnetic field force becomes too large, thus affecting the movement of the stationary iron core 1 in attracting the moving iron core 3.

[0062] In some embodiments, see Figure 9The moving iron core 3 is provided with a buffer 6 on the side facing away from the stationary iron core 1. The buffer 6 is provided with at least two opposing guide bars 61. The contact support 4 is located between the two guide bars 61 on the side facing the moving iron core 3, so as to play the role of mounting and positioning the contact support 4. The contact support 4 and the moving iron core 3 are fixedly connected by bolts. A part of the buffer 6 covers the bolts to block the bolt heads.

[0063] 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.

[0064] 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.

[0065] 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; Contact support member, connected to the moving iron core; A magnetic drive assembly is connected to the contact support. The magnetic drive assembly, the moving iron core, and the contact support are configured to move synchronously. The magnetic drive assembly and the stationary iron core are configured to generate a first magnetic field force, the moving iron core and the stationary iron core are configured to generate a second magnetic field force, and the stationary iron core and the coil winding are configured to generate a third magnetic field force. as well as A reset member is disposed on the side of the magnetic drive assembly away from the contact support member, and applies a reset force to the magnetic drive assembly toward the moving iron core; Wherein, the first magnetic force is in the same direction as the reset force, the third magnetic force is in the opposite direction to the first magnetic force, and the second magnetic force is in the opposite 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, and the reset member applies a reset force to the magnetic drive assembly so that the magnetic drive assembly contacts the stationary iron core under the action of the first magnetic field force and the reset 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 to counteract the first magnetic field force, and the stationary iron core and the moving iron core generate the second magnetic field force to make the moving iron core move 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 contact support component. 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 number of permanent magnets is two, and the two permanent magnets are arranged opposite each other along a third direction, and the two permanent magnets are respectively arranged close to the two coil windings.

6. The permanent magnet electromagnetic system as described in claim 5, 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.

7. The permanent magnet electromagnetic system as described in claim 6, characterized in that, The first magnetic conductor is configured such that the side that generates the first magnetic field force with the stationary iron core has a chamfer.

8. The permanent magnet electromagnetic system as described in claim 6, characterized in that, The magnetic drive module further includes a second magnetic conductor disposed on the mounting component, the second magnetic conductor being in contact with the side of the two permanent magnets away from the first magnetic conductor.

9. 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 wound around 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.

10. The permanent magnet electromagnetic system as described in claim 9, characterized in that, The second magnetic flux plate includes a first magnetic flux section and a second magnetic flux section, the first magnetic flux section and the second magnetic flux section are spaced apart, the first magnetic flux section is connected to the magnetic flux column and is configured to generate the second magnetic field force with the moving iron core, and the second magnetic flux section is configured to generate the first magnetic field force with the magnetic drive assembly.

11. A contactor, characterized in that, include: case; The permanent magnet electromagnetic system as described in any one of claims 1 to 10 is disposed within the housing, and the magnetic drive assembly is slidably connected to the inner wall of the housing.

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