Permanent magnet type electromagnetic system and contactor

Abstract

The invention 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] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a permanent magnet electromagnetic system and a contactor. Background Art

[0002] In a permanent magnet DC contactor, the permanent magnet in its electromagnetic system dominates when the coil winding is not energized or the energizing voltage is insufficient, and the magnetic field of the permanent magnet becomes dominant, magnetizing the magnetic plate, causing the magnetic plate 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 energizing voltage is large enough, the electromagnetic field of the coil winding becomes dominant, and the magnetized magnetic yoke attracts the upper armature connected to the iron core to drive the iron core to move, causing the contactor to close.

[0003] The traditional electromagnetic system uses a single-winding solenoid "I" type 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, which is not suitable for application scenarios with large current and large stroke. Summary of the Invention

[0004] In view of this, the present application provides a permanent magnet electromagnetic system and a contactor to improve the problem that traditional electromagnetic systems are not suitable for application scenarios with a large moving iron core stroke.

[0005] The technical solutions adopted by this application to solve the above technical problems are:

[0006] In a first aspect, an embodiment of the present application provides a permanent magnet electromagnetic system, comprising:

[0007] static iron core;

[0008] Two coil windings, both arranged on the static iron core;

[0009] a moving iron core, arranged opposite to the static iron core along a first direction; and

[0010] a magnetic conductive drive assembly connected to the moving iron core, configured to generate a first magnetic field force between the magnetic conductive drive assembly and the static iron core, the first magnetic field force being used to drive the magnetic conductive drive assembly to move toward the moving iron core to reset the moving iron core, a second magnetic field force being configured to be generated between the moving iron core and the static iron core, and a third magnetic field force being configured to be generated between the static iron core and the coil winding;

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

[0012] In some embodiments of the present application, when the coil winding is not energized, the magnetic drive assembly and the static iron core generate a first magnetic field force, so that the magnetic drive assembly contacts the static iron core under the action of the first magnetic field force;

[0013] When the coil winding is energized, the magnetic drive assembly and the static iron core generate the first magnetic field force, the static iron core generates the third magnetic field force to offset at least a portion of the first magnetic field force, and the second magnetic field force is generated between the static iron core and the moving iron core to move the moving iron core toward the static iron core.

[0014] In some embodiments of the present application, the magnetic drive assembly includes two magnetic drive modules arranged opposite to each other along a second direction. Along the second direction, one side of the static 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 the present application, the magnetic conductive drive module includes a mounting member and a permanent magnet. The mounting member is detachably connected to the moving iron core. The permanent magnet is arranged on the mounting member and can generate the first magnetic field force with the static iron core.

[0016] In some embodiments of the present application, the mounting member includes a plate and a guide rail, wherein the guide rail is provided on a side of the plate away from the static iron core, and the guide rail is used for sliding connection with a sliding groove of a shell for mounting the permanent magnet electromagnetic system.

[0017] In some embodiments of the present application, a mounting groove and a mounting through hole are provided on the plate body, the mounting groove and the mounting through hole are spaced apart along the first direction, the permanent magnet is arranged 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 the present application, an elastic abutment is provided in the mounting through hole, and the elastic abutment is connected to the inner wall of one side of the mounting through hole in the first direction, and is arranged opposite to the inner wall on the other side to define a mounting sub-through hole, and one side of the moving iron core is inserted into the mounting sub-through hole, and the elastic abutment is squeezed by the moving iron core and deformed toward the side away from the moving iron core.

[0019] In some embodiments of the present application, the magnetic driving module also includes a first magnetic conductor, which is arranged 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 static iron core.

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

[0021] In some embodiments of the present application, the magnetic driving module further includes a second magnetic conductor disposed on the mounting member, and the second magnetic conductor is disposed on a side of the permanent magnet away from the first magnetic conductor.

[0022] In some embodiments of the present application, the static iron core includes a first magnetic flux plate, two magnetic flux columns and two second magnetic flux plates, the two magnetic flux columns are arranged on the first magnetic flux plate at intervals along the second direction, the two second magnetic flux plates are respectively arranged on the side of the two magnetic flux columns away from the first magnetic flux plate, the coil winding is arranged on the magnetic flux columns, and the second magnetic flux plates are configured to generate the first magnetic field force with the magnetic conductive drive assembly and generate the second magnetic field force with the moving iron core.

[0023] In some embodiments of the present 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 column, and the second magnetic flux portion is arranged opposite to the magnetic conductive drive component on a side away from the magnetic flux bending portion, so that the second magnetic flux portion and the magnetic conductive drive component are configured to generate a first magnetic field force.

[0024] In some embodiments of the present application, the magnetic flux bending portion is in an L-shape with rounded corners, and a through slot is provided at least in the bending portion of the magnetic flux bending portion.

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

[0026] A housing, wherein the permanent magnet electromagnetic system is provided in the housing, and the magnetic drive assembly is slidably connected to the inner wall of the housing;

[0027] a contact support, detachably connected to the movable iron core and configured to move synchronously with the movable iron core;

[0028] A reset member is disposed in the housing and connected to a side of the magnetic drive assembly away from the moving iron core, and is used to provide a reset force for resetting the moving iron core, wherein the reset force has the same direction as the first magnetic field force.

[0029] In a second aspect, an embodiment of the present application provides a contactor comprising the permanent magnet electromagnetic system as described in the first aspect.

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

[0031] An embodiment of the present application provides a permanent magnet electromagnetic system and a contactor. The permanent magnet electromagnetic system first increases the magnetic attraction between the moving and static iron cores by setting two coil windings, thereby increasing the movement stroke of the moving iron core; secondly, a first magnetic field force can be generated between the static iron core and the magnetic drive component, and the magnetic drive component can drive the moving iron core to move synchronously, so that the magnetic drive component can be affected by the magnetic attraction of the static iron core, so that the magnetic drive component can 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 static iron core offsets at least a part of the first magnetic field force, so that the second magnetic field force that the static iron core has an adsorption effect on the moving iron core can reduce the resistance that needs to be overcome, such as the first magnetic field force, thereby further increasing the movement stroke of the moving iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic structural diagram of a contactor provided in an embodiment of the present application;

[0033] Figure 2 for Figure 1 Explosion diagram of

[0034] Figure 3 A schematic structural diagram of a permanent magnet electromagnetic system provided in an embodiment of the present application;

[0035] Figure 4 for Figure 3 Schematic diagram of the explosion structure;

[0036] Figure 5 A schematic structural diagram of a magnetic drive component in a permanent magnet electromagnetic system provided in an embodiment of the present application;

[0037] Figure 6 for Figure 5 Explosion diagram of

[0038] Figure 7 A schematic structural diagram of a static iron core in a permanent magnet electromagnetic system provided in an embodiment of the present application;

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

[0040] Figure 9 A schematic structural diagram of a buffer component in a permanent magnet electromagnetic system provided in an embodiment of the present application.

[0041] Description of reference numerals:

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

[0043] Z, first direction; Y, second direction. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[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 understood to indicate or imply relative importance or the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0046] In this application, the word “exemplary” is used to mean “serving as an example, instance, or illustration.” Any embodiment described in this application as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0047] See Figure 1 and Figure 2 , an embodiment of the present application provides a contactor, which is a permanent magnet DC contactor, including a shell 7, a permanent magnet electromagnetic system, a contact support 4 and a reset member 8. The permanent magnet electromagnetic system is arranged in the shell 7, and some of the components in the permanent magnet electromagnetic system can be moved in the shell 7 to realize the on-off power control of the contactor to the external device. 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 arranged in the shell 7 and is 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 for resetting the moving iron core 3, and the reset force is 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 static iron core 1, two coil windings 2, a moving iron core 3, and a magnetic drive assembly 5. The two coil windings 2 are both arranged on the static iron core 1, the moving iron core 3 is arranged opposite to the static iron core 1 along the 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 moving iron core 3. The magnetic drive assembly 5, the moving iron core 3, and the contact support 4 are configured to move synchronously. The magnetic drive assembly 5 and the static iron core 1 are configured to generate a first magnetic field force, the moving iron core 3 and the static iron core 1 are configured to generate a second magnetic field force, and the static iron core 1 and the coil winding 2 are configured to generate a third magnetic field force. The reset member 8 is arranged on the side of the magnetic drive assembly 5 away from the contact support 4, and applies a reset force to the magnetic drive assembly 5 in the direction of the moving iron core 3. The first magnetic field force is in the same direction as the reset direction, the third magnetic field force is in the opposite direction to the first magnetic field force, and the second magnetic field force is in the opposite direction to the first magnetic field force.

[0049] The technical solution of the present application is to increase the magnetic attraction between the moving and static iron cores 1 by setting two coil windings 2, thereby increasing the movement stroke of the moving iron core 3; secondly, a first magnetic field force can be generated between the static iron core 1 and the magnetic drive component 5, and the magnetic drive component 5 can drive the moving iron core 3 to move synchronously, so that the magnetic drive component 5 can be affected by the magnetic attraction of the static iron core 1, so that the magnetic drive component 5 can drive the moving iron core 3 to perform a reset movement. When the coil winding 2 is subsequently energized, the third magnetic field force generated by the static iron core 1 offsets at least part of the first magnetic field force, so that the second magnetic field force of the static iron core 1 that has an adsorption effect on 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 movement stroke 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 to magnetize the static iron core 1, so that a magnetic field is generated between the permanent magnet 52 and the static iron core 1, and then a first magnetic field force is generated. 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. Of course, if the first magnetic field force is large enough, it can also directly replace the reset member 8, but 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 second magnetic field force and the first magnetic field force, so as to avoid the second magnetic field force being insufficient to drive the moving iron core 3 toward the static iron core 1 due to the first magnetic field force being too large. If the first magnetic field force is small, it only plays a role in assisting the reset. In order to ensure that the moving iron core is successfully reset, the number of reset members 8 can be increased, and the additional reset members 8 are set on the side of the contact support facing the housing 7 to further provide a reset force for the reset of the moving iron core. Compared with the traditional electromagnetic system, this solution can effectively reduce the reset force required by the reset member 8. When the coil winding 2 is subsequently energized and the static iron core 1 adsorbs the moving iron core 3 under the action of the second magnetic field force, the reset force of the reset member 8 that the moving iron core 3 needs to overcome is smaller than the traditional reset force, thereby increasing the moving stroke of the moving iron core 3.

[0051] Furthermore, the first magnetic field force is equal to and opposite to the third magnetic field force, so that after the subsequent coil winding 2 is energized, the third magnetic field force generated by the static iron core 1 itself can effectively offset the first magnetic field force, avoiding the first magnetic field force from forming resistance that hinders the movement of the moving iron core 3 toward the static iron core 1, thereby increasing the moving 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 static iron core 1, so that the magnetic drive assembly 5 contacts the static 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, so that the magnetic drive assembly 5 contacts the static iron core 1 under the combined action of the first magnetic field force and the reset force, which depends 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 act 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 elastic performance of the spring can be reduced.

[0053] When the coil winding 2 is energized, the magnetic drive assembly 5 and the static iron core 1 generate a first magnetic field force, the static iron core 1 generates a third magnetic field force that offsets the first magnetic field force, and a second magnetic field force is generated between the static iron core 1 and the moving iron core 3 to move the moving iron core 3 toward the static iron core 1. By utilizing the third magnetic field force to at least partially offset the first magnetic field force, it is preferred that the first magnetic field force and the third magnetic field force are equal in magnitude to completely offset the first magnetic field force, thereby preventing the first magnetic field force from hindering the static iron core 1 from adsorbing the moving iron core 3. In addition, because the elastic performance of the reset member 8 is reduced, the resistance of the reset member 8 to the movement of the moving iron core 3 toward the static iron core 1 is also reduced, which is conducive to increasing the travel of the static iron core 1 to adsorb the moving iron core 3 and adapting to the situation of large current and large travel.

[0054] In some embodiments, see Figure 5 and Figure 6 , the magnetic drive assembly 5 includes two magnetic drive modules arranged relatively along the second direction Y, and the second direction Y is perpendicular to the first direction Z. Along the second direction Y, one side of the static iron core 1 is configured to contact with one of the magnetic drive modules, and the other side is configured to contact with the other magnetic drive module. It should be noted here that one side and the other side of the static iron core 1 refer to the side of the static iron core 1 facing the magnetic drive module on one side and the other side of the second direction Y. By making the contact surface of the static iron core 1 relatively arranged with the magnetic drive module, a first magnetic field force is generated, and under the action of the reset member 8, the static iron core 1 can be in contact with the magnetic drive module. In the process of gradually reducing the distance between the contact surface and the magnetic drive module, the first magnetic field force will also gradually increase, thereby improving the contact tightness between the static iron core 1 and the magnetic drive module, and can also relatively reduce the reset force required to be provided by the reset member 8.

[0055] Furthermore, the magnetic drive module includes a mounting member 51 and a permanent magnet 52. The mounting member 51 is detachably connected to the moving iron core 3. The permanent magnet 52 is disposed on the mounting member 51 and can generate a first magnetic field force with the static iron core 1. For example, the mounting member 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 static iron core 1. The guide rail 517 is used to slide in connection with the sliding groove of the housing 7 for mounting the permanent magnet electromagnetic system, so that the movement of the mounting member 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. The mounting slots 511 and mounting holes 512 are spaced apart along the first direction Z. The permanent magnet 52 is positioned within the mounting slots 511. The mounting holes 512 of the two mounting members 51 are aligned. The movable iron core 3 is snapped into the corresponding mounting holes 512 on either side of the movable iron core 3 in the second direction Y. This allows for detachable fixation of the movable iron core 3 and the mounting members 51, while ensuring synchronized movement of the movable iron core 3 and the mounting members 51. The contact support 4 is threadedly connected to the movable iron core 3 on the side facing the movable iron core 3. Correspondingly, a clearance is provided on the side of the contact support 4 facing the movable iron core 3 to clear the female end of the bolt. The contact support 4 and the movable iron core 3 can move synchronously.

[0056] Furthermore, an elastic abutment member 515 is provided in the mounting through-hole. The elastic abutment member 515 is connected to the inner wall of one side of the mounting through-hole 512 in the first direction Z, and is arranged opposite to the inner wall of the other side to define a mounting sub-through-hole. One side of the movable iron core 3 is inserted into the mounting sub-through-hole, and the elastic abutment member 515 is squeezed by the movable iron core 3 and deformed toward the side away from the movable iron core 3. By utilizing the elastic characteristics of the elastic abutment member 515, when the movable iron core 3 is inserted into the mounting sub-through-hole, it squeezes the elastic abutment member 515, causing the elastic abutment member 515 to deform in the first direction Z and generate a reverse force on the movable iron core 3, thereby firmly fixing the movable iron core 3 in the mounting sub-through-hole.

[0057] For further information, see Figure 9 , a buffer 6 is also provided on the moving iron core 3, and at least two opposite guide strips 61 are provided on the buffer 6. The side of the contact support 4 facing the moving iron core 3 is provided between the two guide strips 61 to play the role of installation and positioning of the contact support 4, and then the contact support 4 and the moving iron core 3 are fixedly connected by bolts so that the contact support 4 and the moving iron core 3 can keep moving synchronously. A part of the buffer 6 is located in the avoidance position to cover the bolt and shield the bolt head. Because the buffer 6 is made of soft material, it can not only play a buffering role, but also be deformed when subjected to force. When the bolt needs to be tightened or loosened, the staff only needs to push away the part of the buffer 6 covering the bolt to operate the bolt, which is both beautiful and does not affect normal disassembly and assembly.

[0058] An installation groove 511 is opened in the installation part 51, and the permanent magnet 52 is arranged in the installation groove 511, and one side of the permanent magnet 52 can be arranged opposite to one side of the static iron core 1, so that the contact surface of the static iron core 1 can be magnetized, and then a first magnetic field force is generated between the static iron core 1 and the permanent magnet 52.

[0059] In some embodiments, see Figure 5 and Figure 6 The magnetic driving module further includes a first magnetic conductor 53. The first magnetic conductor 53 is disposed on the mounting member 51 and in contact with the permanent magnet 52. The first magnetic conductor 53 is configured on one side of the first direction Z to generate a first magnetic field force with the static iron core 1. Exemplarily, the first magnetic conductor 53 is disposed in the mounting slot 511 so that the first magnetic conductor 53 is in contact with 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 static iron core 1, thereby generating a first magnetic field force.

[0060] In some embodiments, the magnetic drive module further includes a second magnetic conductor 54 disposed on the mounting frame. The second magnetic conductor 54 is disposed on a 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 by the first magnetic conductor 53 alone and enhancing the first magnetic field force.

[0061] In some embodiments, the first conductive magnet 53, the permanent magnet 52, and the second conductive magnet 54 are stacked within the mounting groove 511 so that the first conductive magnet 53, the second conductive magnet 54, and the permanent magnet 52 are in contact with each other, and the permanent magnet 52 is located between the first conductive magnet 53 and the second conductive magnet 54. A retaining groove 513 is further provided on the inner sidewalls of both sides of the mounting groove 511. Correspondingly, a retaining protrusion 541 is further provided on both sides of the first conductive magnet 53 and the second conductive magnet 54. The retaining protrusion 541 is engaged with the retaining groove 513 to secure the first conductive magnet 53 and the second conductive magnet 54 within the mounting groove 511. The permanent magnet 52 can also be provided with retaining protrusions 541 on both sides and located between the two conductive magnets, or the permanent magnet 52 can be directly located between the two conductive magnets. In this embodiment, the permanent magnet 52 is directly located between the two conductive magnets, which helps simplify the structure of the permanent magnet 52.

[0062] Furthermore, a contact hole 514 is provided on the side of the contact surface of the mounting member 51 facing the static iron core 1, and the side of the contact surface of the first magnetic conductor 53 facing the static 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 static iron core 1 can be arranged relative to each other and generate a first magnetic field force, and under the action of the first magnetic field force and the reset force, the contact surface of the static iron core 1 can be brought into contact with the first magnetic conductor 53.

[0063] Furthermore, the first magnetic conductor 53 is provided with a contact protrusion 531 on one side of the contact surface in the first direction Z and facing the static iron core 1. The contact protrusion 531 is configured to generate a first magnetic field force with the static iron core 1. The contact protrusion 531 passes through the contact hole 514, and the area of ​​the contact protrusion 531 is smaller than the area 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 static iron core 1 and prevents the first magnetic field force from being too strong, 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 static iron core 1 includes a first magnetic flux plate 11, two magnetic flux columns 13, and two second magnetic flux plates 12. The two magnetic flux columns 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 disposed on the side of the two magnetic flux columns 13 away from the first magnetic flux plate 11. The coil windings 2 are disposed on the magnetic flux columns 13. The second magnetic flux plates 12 are configured to generate a first magnetic field force with the magnetic conductive drive assembly 5 and a second magnetic field force with the moving iron core 3. By arranging the two magnetic flux columns 13 on the first magnetic flux plate 11, the two coil windings 2 can be wound around the magnetic flux columns 13. A second magnetic flux plate 12 is also disposed on the side of each magnetic flux column 13 away from the first magnetic flux plate 11. The two second magnetic flux plates 12 have opposite polarities, so that the static iron core 1 can form a magnetic flux circuit through 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 field force. The third magnetic field force is in the opposite direction of the first magnetic field force, thereby offsetting the first magnetic field force and reducing the resistance that the second magnetic field force must overcome to attract the moving iron core 3 toward the static iron core 1. In addition to generating the third magnetic field force, energizing the coil winding 2 also forms a magnetic field between the second magnetic flux plate 12 and the moving iron core 3. In other words, simply energizing the coil winding 2 generates two magnetic fields: one magnetic field for attracting the moving iron core 3 to move, and one magnetic field for reducing the resistance to the movement of the moving iron core 3 caused by the first magnetic field force. Both second magnetic flux plates 12 will produce an adsorption effect on the moving iron core 3, thereby increasing the force that attracts the moving iron core 3, enabling the electromagnetic system to adapt to the requirements of large currents and large travels of the moving iron core 3.

[0065] Further, see Figure 8The second magnetic flux plate 12 includes a first magnetic flux portion 121, a second magnetic flux portion 122, and a magnetic flux bending portion. The first magnetic flux portion 121 and the second magnetic flux portion 122 are connected by the magnetic flux bending portion. The first magnetic flux portion 121 is connected to the magnetic flux column 13. The second magnetic flux portion 122 is disposed opposite the magnetic drive assembly 5 on a side away from the magnetic flux bending portion, so that the second magnetic flux portion 122 and the magnetic drive assembly 5 are configured to generate a first magnetic field force. By bending the second magnetic flux plate 12, the second magnetic flux plate 12 can be connected to the magnetic flux column 13 in one plane, ensuring that the static 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 component 5 in another plane to generate a first magnetic field force. The two planes are preferably in a vertical state, which is equivalent to the second magnetic flux plate 12 being bent 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 between the first magnetizer 53 in the magnetic drive component 5 and the second magnetic flux part 122 and generates a first magnetic field force.

[0066] Furthermore, the magnetic flux bending portion is in the shape of an L with rounded corners, which helps to avoid the magnetic flux aggregation phenomenon at the bend of the second magnetic flux plate 12 due to bending, thereby improving the magnetic flux conduction effect. And at least a through slot 1231 is provided in the bent portion of the magnetic flux bending portion. The through slot 1231 is equivalent to adding an air gap in the magnetic circuit, increasing the magnetic resistance of this area (the magnetic permeability of air is much lower than that of magnetic conductive materials). This will force the magnetic flux to redistribute, avoiding local magnetic saturation caused by excessive concentration of magnetic flux lines at the bend, thereby improving the efficiency of the overall magnetic circuit.

[0067] In summary, the present application utilizes a static iron core 1 to set two coil windings 2, thereby increasing the magnetic field force between the static iron core 1 and the moving iron core 3, thereby increasing the stroke of the moving iron core 3 and adapting to large currents. Furthermore, by utilizing a permanent magnet 52 disposed on a mounting member 51 and movable with the mounting member 51, the permanent magnet 52 can generate a magnetic field through the magnetic conductor and the static iron core 1, thereby assisting the reset member 8 in resetting the moving iron core 3, thereby reducing the reset force required by the reset member 8. During the process of the static iron core 1 adsorbing the moving iron core 3, the force of the reset member 8 that needs to be overcome is also smaller, which is equivalent to further increasing the force of the static iron core 1 adsorbing the moving iron core 3, thereby increasing the moving stroke of the moving iron core 3.

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

[0069] Similarly, it should be noted that, in order to simplify the description of the present disclosure and thus facilitate understanding of one or more embodiments of the present disclosure, the foregoing description of the embodiments of the present disclosure sometimes combines multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the present disclosure requires more features than those recited in the claims. In fact, the features of the embodiments may be fewer than the total features of the individual embodiments disclosed above.

Claims

1. A permanent magnet electromagnetic system, characterized in that: include: Static iron core; Two coil windings, both arranged on the static iron core; A moving iron core, arranged opposite to the stationary iron core along a first direction; as well as A magnetic conductive drive component is connected to the moving iron core, and is configured to generate a first magnetic field force between the magnetic conductive drive component and the static iron core, wherein the first magnetic field force is used to drive the magnetic conductive drive component to move toward the moving iron core to reset the moving iron core, and is configured to generate a second magnetic field force between the moving iron core and the static iron core, and is configured to generate a third magnetic field force between the static iron core and the coil winding; The third magnetic field force is in opposite direction to the first magnetic field force, and the second magnetic field force is in opposite direction to the first magnetic field force.

2. The permanent magnet electromagnetic system according to claim 1, characterized in that: When the coil winding is not energized, the magnetic conductive drive component and the static iron core generate a first magnetic field force, so that the magnetic conductive drive component contacts the static iron core under the action of the first magnetic field force; When the coil winding is energized, the magnetic drive assembly and the static iron core generate the first magnetic field force, the static iron core generates the third magnetic field force that offsets at least a portion of the first magnetic field force, and the second magnetic field force is generated between the static iron core and the moving iron core to move the moving iron core toward the static iron core.

3. The permanent magnet electromagnetic system according to claim 1, characterized in that: The magnetic conductive drive component includes two magnetic conductive drive modules arranged opposite to each other along a second direction. Along the second direction, one side of the static iron core is configured to contact one of the magnetic conductive drive modules, and the other side is configured to contact the other magnetic conductive drive module.

4. The permanent magnet electromagnetic system according to claim 3, characterized in that: The magnetic conductive driving module includes a mounting member and a permanent magnet. The mounting member is detachably connected to the moving iron core. The permanent magnet is arranged on the mounting member and can generate the first magnetic field force with the static iron core.

5. The permanent magnet electromagnetic system according to claim 4, characterized in that: The mounting member comprises a plate body and a guide rail, wherein the guide rail is arranged on a side of the plate body away from the static iron core, and the guide rail is used for sliding connection with a sliding groove of a shell on which the permanent magnet electromagnetic system is mounted.

6. The permanent magnet electromagnetic system according to claim 5, characterized in that: 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 arranged in the mounting groove, and the moving iron core is inserted into the mounting through hole along one side of the second direction.

7. The permanent magnet electromagnetic system according to claim 6, characterized in that: An elastic abutment is provided in the mounting through hole, and the elastic abutment is connected to an inner wall of one side of the mounting through hole in the first direction, and is arranged 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 squeezed by the moving iron core to deform toward a side away from the moving iron core.

8. The permanent magnet electromagnetic system according to claim 4, characterized in that: The magnetic driving 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 static iron core.

9. The permanent magnet electromagnetic system according to claim 8, characterized in that: The first magnetic conductor is provided with a contact protrusion on one side of the first direction, and the contact protrusion is configured to generate a first magnetic field force with the static iron core.

10. The permanent magnet electromagnetic system according to claim 9, characterized in that: The magnetic conductive driving module further includes a second magnetic conductive body arranged on the mounting component, and the second magnetic conductive body is arranged on a side of the permanent magnet away from the first magnetic conductive body.

11. The permanent magnet electromagnetic system according to claim 1, characterized in that: The static iron core includes a first magnetic flux plate, two magnetic flux columns and two second magnetic flux plates, the two magnetic flux columns are arranged on the first magnetic flux plate at intervals along the second direction, the two second magnetic flux plates are respectively arranged on the side of the two magnetic flux columns away from the first magnetic flux plate, the coil winding is arranged on the magnetic flux columns, and the second magnetic flux plates are configured to generate the first magnetic field force with the magnetic conductive drive component and generate the second magnetic field force with the moving iron core.

12. The permanent magnet electromagnetic system according to claim 11, characterized in that: 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 column, and the second magnetic flux portion is arranged opposite to the magnetic conductive drive component on a side away from the magnetic flux bending portion, so that the second magnetic flux portion and the magnetic conductive drive component are configured to generate a first magnetic field force.

13. The permanent magnet electromagnetic system according to claim 12, characterized in that: The magnetic flux bending portion is in a rounded L-shape, and a through groove is provided at least in a bending portion of the magnetic flux bending portion.

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

15. The contactor according to claim 14, characterized in that The contactor also includes: A shell, wherein the permanent magnet electromagnetic system is arranged inside the shell, and the magnetic conductive drive assembly is slidably connected to the inner wall of the shell; A contact support member, detachably connected to the moving iron core, and configured to move synchronously with the moving iron core; A reset member is disposed in the housing and connected to a side of the magnetic driving assembly away from the moving iron core, and is used to provide a reset force for resetting the moving iron core, wherein the reset force has the same direction as the first magnetic field force.

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