Contactor

Abstract

The invention relates to the technical field of electrical structures, in particular to a contactor. The contactor comprises an electromagnetic assembly, a movable contact assembly, a fixed contact assembly and a first elastic piece, the movable contact assembly comprises a movable armature, a conductive beam and a movable contact, the movable armature is connected to the side, away from the fixed armature, of the conductive beam, and the movable contact is connected to the side, facing the fixed armature, of the conductive beam; the static contact assembly comprises a static contact which is arranged between the movable contact assembly and the fixed armature and is opposite to the movable contact; the first elastic piece is arranged between the movable contact assembly and the fixed part; after the magnet exciting coil is powered on, the fixed armature attracts the movable armature to move and drives the movable contact to move to a first position where the movable contact makes contact with the fixed contact, and after the magnet exciting coil is powered off, the first elastic piece drives the movable contact to move to a second position where the movable contact is separated from the fixed contact. When the contactor is a three-phase alternating current contactor, the improved structure can effectively avoid synchronism deviation between the movable contact and the static contact, and avoid the phase loss phenomenon caused by poor contact of part of the contacts.

Description

Technical Field

[0001] The present application relates to the technical field of electrical structures, and in particular to a contactor. Background Art

[0002] The working principle of the contactor in the related technology is to use an electromagnet to drive the moving contact and the static contact to close or separate, so as to achieve the purpose of closing or opening the circuit, and is suitable for starting or controlling motors or other electrical equipment. The main structure of the contactor includes a moving armature, a fixed armature, a reset spring, an excitation coil, a moving contact, a static contact and an insulating support rod. One end of the insulating support rod is connected to the moving armature, and the other end of the insulating support rod is connected to the moving contact. When the two ends of the excitation coil are connected to power, the moving armature moves toward the fixed armature under the action of the magnetic force generated by the excitation coil and closes with the fixed armature. The insulating support rod connected to the moving armature drives the moving contact to work together, so that the moving contact is closed with the static contact, and the external circuit is connected; when the excitation power supply on the excitation coil is disconnected, the fixed armature and the excitation coil lose magnetism, and the moving armature is separated from the fixed armature under the action of the reset spring. The insulating support rod connected to the moving armature drives the moving contact to work together, so that the moving contact is reset and separated from the static contact.

[0003] The following problems are prone to occur during the contactor's closure process: During use, the maximum distance between the moving contact and the static contact will increase slightly. This means that when the fixed armature and the moving armature are closed, the moving contact and the static contact may have poor contact or a small contact surface, resulting in a virtual connection, which will further aggravate the arc between the moving contact and the static contact. The existence of the arc will not only prolong the time for the switch to break the fault circuit and increase the harm of the short-circuit fault in the power system, but will also further worsen the melting of the contact surface, evaporate and sputter to the surrounding space, making the contact thinner, thereby making the gap between the contacts larger, and further increasing the maximum distance between the moving contact and the static contact, which will eventually lead to the inability to connect the static contact and the moving contact. When the contactor is used for multi-phase opening and closing, such as an AC contactor, it will eventually lead to partial phase loss in the AC contactor.

[0004] Most of the current patent documents add some control circuits to the AC contactor so that when the contactor has a phase loss or other problems, the contactor is disconnected through the relevant circuit control to achieve the effect of protecting the device. For example, the patent No. CN2301806Y provides an AC contactor with phase loss protection, and an AC contactor and a normally open contact are installed on the protected AC contactor. When the protected AC contactor loses a phase, the circuit protection device can be disconnected in time; and the patent No. CN205864059U provides a backup power supply for the AC contactor with a phase loss. When the AC contactor loses a phase, the AC contactor after the phase loss continues to work normally by switching the main power supply and the backup power supply circuit. The above patents are all to add circuit control, backup power supply and other additional devices to cut off or switch the power supply to complete the disconnection of the abnormal contactor or continue to work normally when the AC contactor has an abnormal condition, but do not consider how to prevent the AC contactor from losing a phase, which makes these solutions costly and difficult to apply to actual production. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a contactor.

[0006] A contactor provided according to an embodiment of the present application includes:

[0007] The electromagnetic assembly comprises a fixed armature, an iron core and an excitation coil sleeved on the iron core;

[0008] A movable contact assembly, comprising a movable armature, a conductive beam and a movable contact, wherein the movable armature is connected to a side of the conductive beam facing away from the fixed armature, and the movable contact is connected to a side of the conductive beam facing the fixed armature;

[0009] A static contact assembly, comprising a static contact disposed between the movable contact assembly and the fixed armature and disposed directly opposite to the movable contact;

[0010] A first elastic member, disposed between the moving contact assembly and the fixed portion;

[0011] When the excitation coil is energized, the fixed armature attracts the movable armature to move and drives the movable contact to a first position in contact with the static contact. When the excitation coil is deenergized, the first elastic member drives the movable contact to a second position away from the static contact.

[0012] Furthermore, the moving contact assembly includes two moving contacts, which are distributed at two ends of the conductive beam, and the static contacts in the static contact assembly are arranged in a one-to-one correspondence with the moving contacts.

[0013] Furthermore, the movable armature and the movable contact are arranged in a one-to-one correspondence.

[0014] Furthermore, the contactor is an AC contactor, and the moving contact assembly and the static contact assembly are each provided with three groups.

[0015] Further, a first connecting member is provided on the fixed portion, and a second connecting member is provided on the moving contact assembly. When the moving contact assembly moves toward or away from the static contact, the first connecting member and the second connecting member can be matched and connected. When the first connecting member and the second connecting member are matched and connected, the moving contact is limited to a third position, and the second position is between the first position and the third position.

[0016] The contactor further includes a driving component configured to drive the movable contact to move so that the movable contact is restricted to the third position by the first connecting member and the second connecting member.

[0017] Further, the electromagnetic assembly further comprises a bracket and a locking mechanism, and the driving assembly comprises a second elastic member;

[0018] When the locking mechanism is in a locked state, the fixed armature is locked and connected to the bracket through the locking mechanism, and the second elastic member is in an energy storage state and has a tendency to make the fixed armature move toward the moving contact assembly;

[0019] When the locking mechanism is in the unlocked state, the fixed armature and the bracket are unlocked, and the fixed armature moves toward the movable contact assembly under the action of the second elastic member, and pushes the movable contact to at least move to the third position.

[0020] Furthermore, the stationary contact assembly is fixedly connected to the fixed armature, and when the locking mechanism is in an unlocked state, the fixed armature pushes the movable contact to move through the stationary contact assembly under the action of the second elastic member.

[0021] Further, when the locking mechanism is in the unlocked state, after the second elastic member returns to a stable state, the static contact is out of contact with the moving contact in the third position.

[0022] Further, the first connecting member and the second connecting member are both hooks, the first connecting member is a hook with an opening facing away from the fixed armature, and the second connecting member is a hook with an opening facing toward the fixed armature; or

[0023] The first connecting member and the second connecting member are both magnetic members; or

[0024] The first connecting member and the second connecting member are both buckles.

[0025] Furthermore, the contactor further comprises:

[0026] a current transformer, configured to detect whether there is current between the moving contact and the stationary contact when the contactor is in a closed state;

[0027] A controller is configured to control the state of the locking mechanism according to the detection result of the current transformer.

[0028] In the embodiment of the present application, there will no longer be a contact limit during the mutual movement between the movable armature and the fixed armature, and the movement stroke of the movable contact is no longer determined by the distance between the movable armature and the fixed armature, wherein the movable armature is still used to generate magnetic force with the fixed armature to drive the movable contact to move, but the movement stroke of the movable contact is completely determined by the specific position of the static contact, that is, after the excitation coil is energized, the fixed armature attracts the movable armature to move toward the fixed armature until the movable contact driven by the movable armature abuts against the static contact, at this time, mutual squeezing force will be generated between the movable contact and the static contact due to the magnetic attraction of the fixed armature on the movable armature, making the contact connection more stable.

[0029] The movement stroke of the moving contact is determined by the position of the static contact, rather than by the distance between the moving armature and the fixed armature. After the moving contact and the static contact are closed, the extrusion force generated by the magnetic force makes the two contact more closely, reducing the contact resistance and reducing the occurrence of arcs. This design avoids problems such as poor contact, virtual connection and phase loss between the moving contact and the static contact due to wear, ablation or deformation, improves the reliability and service life of the contactor, and is suitable for various scenarios such as motor control and power switching in industrial power systems. When the contactor is a single-phase contactor, it effectively solves the problem that the traditional single-phase contactor cannot contact after the maximum distance between the moving contact and the static contact increases; when the contactor is a three-phase AC contactor, the improved structure can effectively avoid the synchronization deviation between the moving contact and the static contact, and avoid the phase loss caused by poor contact of some contacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0031] Figure 1 It is a structural schematic diagram of a contactor in the related art;

[0032] Figure 2 A schematic diagram of the structure of a single-phase contactor provided in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of the structure of a three-phase contactor provided in an embodiment of the present application;

[0034] Figure 4 A schematic structural diagram of a moving contact assembly in a contactor provided in an embodiment of the present application;

[0035] Figure 5 A schematic structural diagram of another movable contact assembly in a contactor provided in an embodiment of the present application;

[0036] Figure 6 A schematic diagram of the structure of another three-phase contactor provided in an embodiment of the present application;

[0037] Figure 7 A schematic diagram of a locking mechanism in a contactor provided in an embodiment of the present application;

[0038] Figure 8 Schematic diagram showing the structure of the contactor provided in the embodiment of the present application under different working conditions.

[0039] In the figure:

[0040] 1′, moving armature; 2′, fixed armature; 3′, return spring; 4′, excitation coil; 5′, moving contact; 6′, stationary contact; 7′, insulating support rod;

[0041] 100, electromagnetic assembly; 110, fixed armature; 120, iron core; 130, excitation coil; 140, bracket; 151, I-shaped key; 152, first keyway; 153, second keyway;

[0042] 200, moving contact assembly; 210, moving armature; 220, conductive beam; 230, moving contact; 240, second connecting member;

[0043] 300, static contact assembly; 310, static contact; 320, fixing member;

[0044] 400, a first elastic member;

[0045] 500, fixing portion; 510, first connecting member;

[0046] 600. Second elastic member. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0048] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a system, product or device comprising a series of units is not necessarily limited to those units explicitly listed, but may include units that are not explicitly listed or inherent to these products or devices.

[0049] In this application, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0050] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0051] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0053] A structure of an AC contactor in the related art is as follows: Figure 1As shown. The working principle of the contactor is to use an electromagnet to drive the moving contact 5' and the static contact 6' to close or separate, so as to achieve the purpose of closing or opening the circuit, and is suitable for starting or controlling motors or other electrical equipment. The main structure of the contactor includes a moving armature 1', a fixed armature 2', a reset spring 3', an excitation coil, a moving contact 5', a static contact 6' and an insulating support rod 7'. One end of the insulating support rod 7' is connected to the moving armature 1', and the other end of the insulating support rod 7' is connected to the moving contact 5'. When the two ends of the excitation coil are connected to the power supply, the moving armature 1' is moved toward the fixed armature 2' by the magnetic force generated by the excitation coil and is closed with the fixed armature 2'. The insulating support rod 7' connected to the moving armature 1' drives the moving contact 5' to close. 5′ works together, so that the moving contact 5′ is closed with the static contact 6′, and the external circuit is connected. This process is the closing process; when the excitation power supply on the excitation coil is disconnected, the fixed armature 2′ and the excitation coil 4′ lose magnetism, and the moving armature 1′ is separated from the fixed armature 2′ by the action of the reset spring 3′, and the insulating support rod 7′ connected to the moving armature 1′ drives the moving contact 5′ to work together, so that the moving contact 5′ is reset and separated from the static contact 6′, and the external circuit is cut off. This process is the opening process.

[0054] analyze Figure 1In the working process of the contactor shown in the figure, it is not difficult to find that the movement stroke of the moving contact 5' (the maximum distance between the fixed armature 2' and the moving armature 1') is fixed and unchanged during the working process, which is the movement stroke of the moving armature 1', that is, the maximum distance between the moving armature 1' and the fixed armature 2'. In order to achieve the closing effect of the moving and static contacts 6', the maximum distance between the fixed armature 2' and the moving armature 1' and the maximum distance between the moving contact 5' and the static contact 6' should be consistent, that is, after the fixed armature 2' and the moving armature 1' are attracted, the moving contact 5' and the static contact 6' are also just completed in contact. However, the following problems are prone to occur in the process of the contactor being attracted: during use, the maximum distance between the moving contact 5' and the static contact 6' will increase slightly. There are many reasons why the maximum distance between the moving contact 5' and the static contact 6' may slightly increase. For example, during the closing process, when the moving contact 5' approaches the static contact 6' but the two are not closed for a very short period of time, an ignition arc will be generated between the moving contact 5' and the static contact 6', causing the two contacts to be burned. Or during the opening process, when the moving contact 5' leaves the static contact 6' but the distance between the two is still relatively short, an ignition arc will also be generated between the moving contact 5' and the static contact 6', causing the two contacts to be burned. The burning causes the contact surface material to melt or deform, causing the moving contact The maximum distance between point 5′ and the static contact 6′ will increase slightly; for example, with frequent use, the high-frequency collision between the moving contact 5′ and the static contact 6′ causes the contacts to deform over time, resulting in a slight increase in the maximum distance between the moving contact 5′ and the static contact 6′; for example, the wear of the moving parts of the contactor will also cause a slight increase in the maximum distance between the moving contact 5′ and the static contact 6′; for example, for a contactor with multiple contacts, the problem of processing accuracy may also cause inconsistencies in the maximum distances between different contacts and the static contact 6′.

[0055] After the maximum distance between the moving contact 5′ and the static contact 6′ increases slightly, when the fixed armature 2′ and the moving armature 1′ are attracted, the moving contact 5′ and the static contact 6′ may have poor contact or a small contact surface, resulting in a virtual connection, which will further aggravate the arc between the moving contact 5′ and the static contact 6′. The existence of the arc will not only prolong the time for the switch to break the faulty circuit and aggravate the harm of the short-circuit fault in the power system, but will also further aggravate the melting of the contact surface, evaporate and sputter to the surrounding space, making the contact further thinner, thereby making the gap between the contacts larger, and the maximum distance between the moving contact 5′ and the static contact 6′ further increased, ultimately resulting in the static contact and the moving contact 5′ being unable to connect. When the contactor is only used for single-phase opening and closing, the maximum distance between the moving contact 5′ and the static contact 6′ increases and cannot be connected, which will cause the contactor to be unable to switch the circuit on and off; when the contactor is used for multi-phase opening and closing, for example, the AC contactor has a total of six pairs of moving contacts 5′ and static contacts 6′ in three phases. Since the six moving contacts 5′ of the AC contactor are fixed together, the six moving contacts 5′ are controlled to move synchronously by the moving armature 1′ and the insulating support rod 7′. If the maximum distance between some moving contacts 5′ and the static contacts 6′ increases, when the moving armature 1′ and the fixed armature 2′ are attracted, it may cause some moving contacts 5′ and the static contacts 6′ to be virtually connected, eventually causing partial phase loss of the AC contactor.

[0056] Based on this, Figure 2 and 3 As shown, the structure of the contactor provided in the embodiment of the present application mainly includes an electromagnetic assembly 100, a moving contact assembly 200, a stationary contact assembly 300 and a first elastic member 400. The electromagnetic assembly 100 mainly includes a fixed armature 110, an iron core 120 and an excitation coil 130 sleeved on the iron core 120; the moving contact assembly 200 includes a moving armature 210, a conductive beam 220 and a moving contact 230, wherein the moving armature 210 is connected to a side of the conductive beam 220 away from the fixed armature 110, and the moving contact 230 is connected to a side of the conductive beam 220 facing the fixed armature 110; the stationary contact assembly 300 includes a stationary contact 310, which is arranged between the moving contact assembly 200 and the fixed armature 110, and the stationary contact 310 and the moving contact 230 are arranged opposite to each other; the first elastic member 400 is arranged between the moving contact assembly 200 and the fixed portion 500.

[0057] The excitation coil 130 can generate magnetic force to drive the movement of the movable armature 210 through the fixed armature 110 by controlling the power on and off. The movable contact assembly 200 is used to move synchronously under the drive of the movable armature 210. The static contact 310 of the static contact assembly 300 is arranged between the movable contact assembly 200 and the fixed armature 110, and is arranged opposite to the movable contact 230. The static contact 310 can be arranged between the movable contact assembly 200 and the fixed armature 110 through the fixing member 320 to be fixedly connected with the device housing or other structures to avoid position displacement caused by vibration or external force. The first elastic member 400 is used to store energy in the process of closing the switch when the excitation coil 130 is powered on, and to provide elastic force to separate the movable contact 230 from the static contact 310 when the excitation coil 130 is powered off to achieve opening. That is, after the excitation coil 130 is energized, the fixed armature 110 attracts the movable armature 210 to move and drives the movable contact 230 to move to a first position in contact with the static contact 310; after the excitation coil 130 is de-energized, the first elastic member 400 drives the movable contact 230 to move to a second position away from the static contact 310.

[0058] The working principle of the contactor of this embodiment is as follows: after the excitation coil 130 is energized, the electromagnetic assembly 100 generates magnetic force, and the fixed armature 110 attracts the movable armature 210 to move toward the fixed armature 110. In this process, the magnetic attraction force on the movable armature 210 is greater than the elastic force generated by the deformation of the first elastic member 400. The first elastic member 400 accumulates energy after elastic deformation due to the movement of the movable armature 210. The movable armature 210 drives the conductive beam 220 and the movable contact 230 thereon to move toward the static contact 310 until the movable contact 230 contacts the static contact 310 and closes the circuit. At this time, the state reference Figure 8 As shown in Figure B, during this process, the movement stroke of the moving contact 230 is determined by the position of the static contact 310, rather than the distance between the moving armature 210 and the fixed armature 110. When the moving contact 230 contacts the static contact 310, the magnetic force continues to act, and an extrusion force is formed between the moving contact 230 and the static contact 310, ensuring a more stable contact and reducing the virtual contact phenomenon; when the excitation coil 130 is powered off, the fixed armature 110 and the moving armature 210 lose the magnetic force, and the elastic force of the first elastic member 400 in the energy storage state drives the moving contact assembly 200 to reset, so that the moving contact 230 is separated from the static contact 310. At this time, the state reference Figure 8 As shown in Figure A, the process of disconnecting the circuit and resetting the movable contact 230 relies on the elastic force of the first elastic member 400 after deformation.

[0059] In the above embodiment, there will no longer be a contact limit during the mutual movement between the movable armature 210 and the fixed armature 110, and the movement stroke of the movable contact 230 is no longer determined by the distance between the movable armature 210 and the fixed armature 110, wherein the movable armature 210 is still used to generate magnetic force with the fixed armature 110 to drive the movable contact 230 to move, but the movement stroke of the movable contact 230 is completely determined by the specific position of the static contact 310, that is, after the excitation coil 130 is energized, the fixed armature 110 attracts the movable armature 210 to move toward the fixed armature 110 until the movable contact 230 driven by the movable armature 210 abuts against the static contact 310, at this time, the movable contact 230 and the static contact 310 will also generate mutual squeezing force due to the magnetic attraction of the fixed armature 110 on the movable armature 210, making the contact connection more stable.

[0060] The movement stroke of the moving contact 230 is determined by the position of the static contact 310, rather than by the distance between the moving armature 210 and the fixed armature 110. After the moving contact 230 and the static contact 310 are closed, the extrusion force generated by the magnetic force makes the two contact more closely, reduces the contact resistance, and reduces the occurrence of arcs. This design avoids the problems of poor contact, virtual connection, and phase loss between the moving contact 230 and the static contact 310 caused by factors such as wear, ablation or deformation, improves the reliability and service life of the contactor, and is suitable for various scenarios such as motor control and power switching in industrial power systems. When the contactor is a single-phase contactor, it effectively solves the problem that the traditional single-phase contactor cannot contact after the maximum distance between the moving contact 230 and the static contact 310 increases; when the contactor is a three-phase AC contactor, the improved structure can effectively avoid the synchronization deviation between the moving contact 230 and the static contact 310, and avoid the phase loss caused by poor contact of some contacts.

[0061] Preferably, the movable contact 230 can be made of silver alloy or other ablation-resistant conductive materials to reduce the loss of the contact surface caused by the arc. The connection between the movable contact 230 and the conductive beam 220 can be riveted or welded to ensure the firmness of the contact during movement.

[0062] Preferably, the first elastic member 400 is a coil spring, and its elastic force is precisely calculated, so that it can be quickly reset when the power is off, and will not cause significant obstruction to the magnetic attraction when the power is on. The material of the coil spring is preferably high-strength steel or other fatigue-resistant materials to increase the service life. The material selection of the static contact 310 gives priority to wear resistance and corrosion resistance, such as copper-based alloys or silver-plated contacts.

[0063] In some embodiments, Figure 4 and 5As shown, the moving contact assembly 200 includes two moving contacts 230 , which are distributed at both ends of the conductive beam 220 , and the number of stationary contacts 310 in the stationary contact assembly 300 is also two and they are arranged one-to-one with the moving contacts 230 . The specific working principle is that the two static contacts 310 in the static contact assembly 300 are separated from each other in space. When the contactor is in the disconnected state, the moving contact 230 is also separated from the static contact 310, the conductive beam 220 does not participate in the current conduction, and the circuit remains disconnected; when the contactor is closed, the electromagnetic assembly 100 drives the moving armature 210 to move, driving the conductive beam 220 and the moving contacts 230 at both ends to approach the static contact 310. As the moving contact 230 contacts the static contact 310 respectively, the conductive beam 220 connects the two moving contacts 230, thereby realizing the electrical connection of the two static contacts 310. The conductive beam 220 plays a bridging role in this process, so that the two contact points form a continuous conductive loop to complete the circuit closure. The conductive beam 220 mechanically connects the two moving contacts 230 as a whole, and ensures the synchronous movement of the two moving contacts 230 through its rigidity. The conductive beam 220 is connected to the movable armature 210. When driven by the electromagnetic assembly 100, the conductive beam 220 as a whole drives the two movable contacts 230 to move synchronously, thereby ensuring that when the contactor is closed or disconnected, the two movable contacts 230 can simultaneously contact or separate from the corresponding static contacts 310, thereby avoiding the phenomenon of poor contact or incomplete disconnection. Even if the spatial positions of the two static contacts 310 are slightly offset, the conductive beam 220 can be deflected accordingly, so that the two pairs of movable contacts 230 and static contacts 310 are tightly connected and contacted.

[0064] Preferably, the conductive beam 220 is integrally formed and made of a highly conductive material (such as copper or copper alloy), and may be tinned or silvered on the surface to reduce power loss and contact resistance, while improving corrosion resistance. In the closed state, the conductive beam 220 is responsible for conducting current between the two static contacts 310, and its high conductivity can meet the requirements of high current and high frequency operation of the contactor, ensuring the reliability and stability of the circuit.

[0065] The movable armature 210 in the movable contact assembly 200 may be disposed in the following two ways.

[0066] The first way is, Figure 4As shown, in each movable contact assembly 200, the number of movable armature 210 is set to one, and it is preferably set in the middle of the conductive beam 220, or designed to be equal in length to the conductive beam 220, to ensure the stability of the structure and the reliability of movement. In this way, the electromagnetic assembly 100 directly drives the single movable armature 210 to move, and the movable armature 210 drives the conductive beam 220 to move as a whole through the mechanical connection with the conductive beam 220, and the conductive beam 220 then synchronously drives the movable contacts 230 at both ends thereof to move. During operation, after the electromagnetic assembly 100 is energized, the electromagnetic force generated causes the single movable armature 210 to move in a specified direction. The movable armature 210 drives the movable contacts 230 at both ends of the conductive beam 220 to approach the static contact 310 through the mechanical connection with the conductive beam 220, thereby achieving contact and electrical connection between the two movable contacts 230 and the static contact 310; when the electromagnetic assembly 100 is powered off, the movable armature 210 returns to its initial position under the action of the first elastic member 400, and the conductive beam 220 drives the two movable contacts 230 to separate from the static contact 310, and the circuit is disconnected.

[0067] This method has a simple structure. Since there is only one movable armature 210, the design and processing are relatively simple, the number of parts is small, and the manufacturing cost is reduced. The movable armature 210 is centrally arranged in the middle or designed with equal size, which can reduce the risk of deformation of the conductive beam 220 due to uneven force and ensure long-term stable operation. This method is suitable for contactor designs with short conductive beams 220 and compact structures.

[0068] The second method is, Figure 5 As shown, a plurality of movable armatures 210 are provided in each movable contact assembly 200, and the movable armatures 210 correspond one to one with the movable contacts 230. For example, when two movable contacts 230 are provided and are located at both ends of the conductive beam 220, the number of movable armatures 210 is also set to two, and the two movable armatures 210 are respectively provided at both ends of the conductive beam 220, and a mechanical connection is formed through the conductive beam 220.

[0069] During operation, after the electromagnetic assembly 100 is energized, the two movable armatures 210 move simultaneously under the action of the electromagnetic force, and drive the conductive beam 220 and the two movable contacts 230 to move toward the static contact 310 through the mechanical connection of the conductive beam 220. Since the two movable armatures 210 are respectively close to the two movable contacts 230, they can apply more targeted squeezing force in their respective contact areas, increase the contact pressure of each contact, ensure that the movable contact 230 and the static contact 310 are in close contact, and thus achieve a more stable electrical connection; when the electromagnetic assembly 100 is powered off, the movable contact assembly 200 returns to its initial position under the action of the first elastic member 400, the movable contact 230 is separated from the static contact 310, and the circuit is disconnected. That is, the two movable armatures 210, driven by the electromagnetic assembly 100, simultaneously drive the conductive beam 220 to move as a whole. However, since the two movable armatures 210 are respectively located at the two ends of the conductive beam 220, they can provide more targeted squeezing force in their respective contact areas to ensure the contact reliability between the movable contact 230 and the static contact 310.

[0070] On the one hand, the two movable armatures 210 are distributed at both ends of the conductive beam 220, which can provide more precise extrusion force in their respective areas, reducing the problem of excessive contact resistance or poor contact caused by insufficient pressure in the contact point area. On the other hand, driven by the double movable armature 210, the movable contacts 230 at both ends of the conductive beam 220 are subjected to a more uniform force, effectively avoiding uneven contact wear or performance degradation due to uneven force. In scenarios where higher contact reliability or higher current capacity is required, the two movable armatures 210 can provide greater contact pressure, further improving contact performance, and for multi-pole, multi-contact contactors, the double movable armature 210 can share the motion load of the conductive beam 220, improving the force uniformity and contact stability of the entire component.

[0071] In some embodiments, Figure 3 As shown, the contactor is an AC contactor, and the moving contact assembly 200 and the static contact assembly 300 are each provided with three groups to meet the on and off requirements of the three-phase circuit of the AC contactor. In this design, the moving contact assembly 200 and the static contact assembly 300 are respectively provided in three groups, corresponding to the three phase lines (phase A, phase B, phase C) in the three-phase circuit, and the three groups of moving contact assemblies 200 are respectively used to control the on and off of the three phase lines. The structure of each group of moving contact assemblies 200 and static contact assemblies 300 is similar to the design of a single-phase contactor, but the three groups of assemblies are independently provided and work in coordination to ensure the normal operation of the three-phase circuit.

[0072] The three groups of moving contact assemblies 200 are synchronously controlled by the moving armature 210 or other driving mechanisms, that is, when the contactor is closed, the three groups of moving contact assemblies 200 are driven by electromagnetic force to move toward their corresponding static contact assemblies 300 respectively, and the three groups of moving contact assemblies 200 are in contact with the corresponding static contact assemblies 300 at the same time to achieve the closing of the three-phase circuit; when the contactor is disconnected, the first elastic member 400 restores the three groups of moving contact assemblies 200 to the initial position, and the three groups of moving contact assemblies 200 are separated from the static contact assemblies 300 at the same time to achieve the disconnection of the three-phase circuit.

[0073] When there are two movable armatures 210 in each movable contact assembly 200 and they are located at both ends of the conductive beam 220, the AC contactor in the above embodiment is shown in the figure, and the three conductive beams 220 are respectively connected by three first elastic members 400 to control the six movable contacts 230. The six movable armatures 210 are installed on the back side of the conductivity and are arranged corresponding to the movable contacts 230. When the excitation coil 130 is energized, the fixed armature 110 below and the six movable armatures 210 above are attracted to each other due to the action of the magnetic field, overcoming the elastic force of the first elastic member 400 to attract downward until the movable contact 230 contacts the static contact 310 and there is a certain pressure. When the excitation coil 130 is de-energized, the first elastic member 400 rebounds due to the elastic action, so that the movable and static contacts 310 are separated.

[0074] The contactor provided in the above-mentioned embodiment of the present application has been improved in structure. There will be no contact limit in the mutual movement process between the movable armature 210 and the fixed armature 110. The movement stroke of the movable contact 230 is no longer determined by the distance between the movable armature 210 and the fixed armature 110. The movement stroke of the movable contact 230 is completely determined by the specific position of the static contact 310, which effectively solves the problem that the conventional single-phase contactor cannot contact after the maximum distance between the movable contact 230 and the static contact 310 increases or is more likely to generate an arc. However, the above-mentioned structure still has a new problem. The reset of the movable contact assembly 200 depends on the first elastic member 400, which puts forward higher requirements on the reliability of the first elastic member 400. When the performance of the first elastic member 400 is abnormal, the following situation may occur: Taking the three-phase AC contactor as an example, when the excitation coil 130 is powered off, one of the first elastic members 400 fails due to aging, fatigue or other reasons and does not rebound, and the corresponding movable contact 230 and the static contact 310 are still stuck together. At this time, the state reference Figure 8 As shown in Figure C, the moving contact 230 and the static contact 310 of one phase of the AC contactor are not completely disconnected, causing the contactor to fail. When this happens, the current transformer in the circuit will detect that there is still current in one phase of the circuit.

[0075] Based on this, in some embodiments of the contactor, such as Figure 6As shown, the fixing portion 500 is provided with a first connecting member 510, and the moving contact assembly 200 is provided with a second connecting member 240. In the process of the moving contact assembly 200 moving close to or away from the static contact 310, the first connecting member 510 and the second connecting member 240 can be matched and connected when they are close to or in contact. In the state where the first connecting member 510 and the second connecting member 240 are matched and connected, the moving contact 230 is limited to a third position; the contactor includes a driving assembly, and the driving assembly is configured to drive the moving contact 230 to move, so that the moving contact 230 is limited to the third position by the first connecting member 510 and the second connecting member 240. At this time, the state reference Figure 8 As shown in Figure G. When the moving contact 230 is limited to the third position, the moving contact assembly 200 and the stationary contact assembly 300 are in a disconnected state.

[0076] The specific working logic can be that after the contactor executes the disconnection command, that is, after the excitation coil 130 is powered off, if the current transformer in the circuit detects that there is still current in one or more phases in the circuit, then a signal instruction is sent to the drive component through the controller to control the drive component to drive all the moving contacts 230 to move, so that all the moving contacts 230 are limited to the third position by the first connecting member 510 and the second connecting member 240, so that the moving contacts 230 and the static contacts 310 that are not separated in time are forcibly separated, thereby solving the problem of one or more phases sticking in the contactor, and being able to cut off the sticking phase of the contactor in time to protect the devices connected to the contactor. A further working logic is that when the controller closes the contactor again, the moving contact assembly 200 is limited by the first connecting member 510 and the second connecting member 240 and cannot move toward the static contact assembly 300, causing the moving contact 230 and the static contact 310 of the contactor to fail to be attracted, and the contactor cannot be closed and connected, thereby preventing the contactor with a risk of one or more phases sticking from being closed again and causing a working failure. At the same time, the current transformer in the circuit detects that there is no current in the circuit. At this time, it can be determined that the contactor is damaged, and an alarm or prompt can be issued to the outside world.

[0077] The above embodiment achieves forced separation of the sticking contacts through the cooperation of the driving assembly, the first connector 510 and the second connector 240, avoiding the contact adhesion problem caused by the failure of the first elastic member 400, and preventing the contactor with sticking contacts from being closed again, avoiding greater circuit failure and equipment damage. In this process, the current transformer and the controller can also cooperate to automatically detect the operating status of the contactor, and promptly alarm when a fault occurs, providing a further fault protection mechanism, greatly improving the reliability and safety of the contactor, and enhancing the ability of automatic operation, which is suitable for complex industrial electrical control environments.

[0078] In the implementation manner of the present application, in order to realize the limiting function of the movable contact assembly 200 in a specific state, the first connecting member 510 and the second connecting member 240 can be realized in a variety of structural forms. The following are several optional design solutions.

[0079] Optionally, both the first connector 510 and the second connector 240 are hooks, the first connector 510 is a hook with an opening facing away from the fixed armature 110, and the second connector 240 is a hook with an opening facing the fixed armature 110. When the movable contact assembly 200 moves to the vicinity of the third position, the hook structures of the first connector 510 and the second connector 240 engage with each other to limit the movable contact assembly 200 to the third position. The structure is simple, easy to manufacture and assemble; the mechanical clamping method is reliable, and can effectively maintain the limit state after the movable contact 230 and the static contact 310 are forcibly separated, and is suitable for various scenarios in which no additional energy support is required in contactors.

[0080] Optionally, both the first connector 510 and the second connector 240 are magnetic parts. Magnetic parts include but are not limited to magnets or electromagnets; the polarities of the first connector 510 and the second connector 240 are opposite, so that they can be attracted and connected when they are close. When the moving contact assembly 200 moves to the third position, the first connector 510 and the second connector 240 limit the moving contact assembly 200 in the third position through magnetic adsorption. No mechanical clamping is required, which avoids functional failure due to mechanical wear; higher reliability and stability can be achieved, especially for contactors with high-frequency operation; if an electromagnet is used, the release of the limit state can also be achieved by controlling the on and off of the power. It is suitable for scenarios with high requirements on the reliability and flexibility of the limit device, such as high-end industrial equipment or complex control systems.

[0081] Optionally, the first connector 510 and the second connector 240 are buckles, which can achieve reliable mechanical connection through buckle fit; when the movable contact assembly 200 moves to the vicinity of the third position, the first connector 510 and the second connector 240 are buckled to fix the movable contact assembly 200 in a disconnected state. The connection is firm and can remain stable during long-term use; compared with the hook structure, the buckle structure has higher vibration resistance and durability; it is suitable for use in vibration or impact environments, such as high-voltage or high-power contactors.

[0082] The above three optional design solutions can be flexibly selected according to the specific application scenarios of the contactor. These designs provide multiple implementation methods for limiting the moving contact assembly 200, further improving the applicability and reliability of the contactor.

[0083] Based on the above implementation, Figure 6 and 7As shown, the electromagnetic assembly 100 also includes a bracket 140 and a locking mechanism, and the driving assembly includes a second elastic member 600; when the locking mechanism is in a locked state, the fixed armature 110 is locked and connected to the bracket 140 through the locking mechanism, and the second elastic member 600 is in an energy storage state and has a tendency to make the fixed armature 110 move toward the moving contact assembly 200; when the locking mechanism is in an unlocked state, the fixed armature 110 and the bracket 140 are unlocked, and the fixed armature 110 moves toward the moving contact assembly 200 under the action of the second elastic member 600, and pushes the moving contact 230 to at least move to the third position, and the second position is located between the first position and the third position. The stationary contact assembly 300 is fixedly connected to the fixed armature 110. When the locking mechanism is in an unlocked state, the fixed armature 110 pushes the movable contact 230 to move through the stationary contact assembly 300 under the action of the second elastic member 600, thereby achieving more direct power transmission and movement control of the movable contact 230.

[0084] In the normal working mode, the locking mechanism is in a locked state, the fixed armature 110 is locked and connected to the bracket 140 through the locking mechanism, the second elastic member 600 is in an energy storage state and has a tendency to make the fixed armature 110 move toward the moving contact assembly 200. Since the armature is locked and connected to the bracket 140 through the locking mechanism, the moving armature 210 will not be separated from the bracket 140 due to the elastic force of the second elastic member 600. The closing and opening process between the moving contact 230 and the static contact 310 is completed by turning on and off the power of the excitation coil 130. Its state is referenced Figure 8 As shown in Figures A and B.

[0085] When the contactor appears Figure 8 When there is a contact sticking problem as shown in Figure C, that is, when the excitation coil 130 is powered off and the contactor executes the disconnection command, if the current transformer in the circuit detects that there is still current in one or more phases in the circuit, then a signal command is sent to the locking mechanism through the controller, and the locking mechanism has a locking state action, such as Figure 8 In the unlocked state shown in FIG. DG, the fixed armature 110 drives the static contact assembly 300 to move toward the movable contact assembly 200 under the action of the second elastic member 600. After the stored energy of the second elastic member 600 is released, the second elastic member 600 will eventually be in a state as shown in FIG. Figure 8In the stable state shown in FIG. G, in the movement stage after the stored energy of the second elastic member 600 is suddenly released, the second elastic member 600 will push the fixed armature 110, the static contact assembly 300 and the moving contact assembly 200 to move, and further overcome the elastic force of the first elastic member 400 when pushing the moving contact assembly 200. Due to the strong inertia effect in the movement process after the sudden release, the moving contact 230 will rush through the position of the second elastic member 600 in the final stable state during the movement process. Figure 8 The movable contact 230 can be pushed to at least move to a further third position, so that all movable contacts 230 are limited to the third position by the first connecting member 510 and the second connecting member 240. Figure 8 As shown in FIG. F, at this time, under the reverse force of the second elastic member 600, the second elastic member 600 will return to the natural state, and the static contact assembly 300 will retreat toward the direction of the bracket 140 driven by the fixed armature 110 to reach Figure 8 In the state shown in the middle G figure, the static contact 310 is forcibly separated from the movable contact 230 limited to the third position, which solves the problem of one or more phases sticking in the contactor, and can cut off the sticking phase of the contactor in time to protect the device connected to the contactor. In this embodiment, the drive assembly includes at least a second elastic member 600, an unlocking mechanism and a fixed armature 110.

[0086] After the excitation coil 130 is powered off, if it is found that there is still current flowing through the adhesion phase, the controller sends a signal to unlock the locking mechanism, triggering the release of the second elastic member 600, and forcibly separating the contacts. This design avoids the problem that the traditional contactor is difficult to separate when the moving contact 230 is adhered, and can quickly restore the disconnected state of the contactor. When the controller tries to close the contactor again, the moving contact 230 is limited to the third position and cannot move to the static contact 310, and the contactor cannot be closed, avoiding the adhesion fault from occurring again. At this time, the current transformer in the circuit detects that there is no current flowing, and it can be judged that the contactor is damaged, and an alarm or prompt information is issued to the outside world. The release of the second elastic member 600 not only overcomes the reverse elastic force of the first elastic member 400, but also makes the moving contact 230 move to the third position through the inertia of movement, and the static contact 310 retreats due to the second elastic member 600 restoring the natural state, ensuring that the contacts are disconnected, so that the moving contact assembly 200 is completely separated from the static contact 310, thereby completely cutting off the adhesion phase.

[0087] This embodiment effectively solves the problem of contact adhesion by introducing a locking mechanism and a second elastic member 600 into the contactor and combining the detection and control capabilities of the controller. This design effectively improves the reliability and safety of the contactor and is particularly suitable for equipment with high requirements for contact action, such as three-phase AC contactors.

[0088] The stationary contact assembly 300 is preferably connected to the fixed armature 110 by a mechanical structure (such as screws, welding or other fixing methods). When the fixed armature 110 moves under the action of the second elastic member 600, the movement of the moving contact assembly 200 is pushed through the transmission action of the stationary contact assembly 300 until the moving contact 230 reaches the third position, and then the stationary contact assembly 300 retreats with the fixed armature 110 to achieve complete separation of the moving contact 230 and the stationary contact 310.

[0089] The stationary contact assembly 300 is directly fixedly connected to the fixed armature 110. The movement of the fixed armature 110 directly pushes the moving contact assembly 200 through the stationary contact assembly 300. No additional motion transmission mechanism is required. The structure is simpler, which avoids losses or errors in motion transmission. The stationary contact assembly 300 serves as an intermediate medium between the fixed armature 110 and the moving contact assembly 200, and can ensure that when the second elastic member 600 is released, the moving contact 230 is accurately pushed to the third position by the stationary contact assembly 300.

[0090] It should be emphasized that in the above embodiment, when the locking mechanism is in the unlocked state, after the second elastic member 600 returns to a stable state, the static contact 310 is out of contact with the moving contact 230 in the third position. By releasing the second elastic member 600, it is ensured that the moving contact assembly 200 is pushed to the third position, so that the moving contact 230 and the static contact 310 are completely separated, and circuit failure caused by adhesion is avoided. The second elastic member 600 provides sufficient power during the release process, and combined with the inertia effect, it can effectively overcome the elastic force of the first elastic member 400 and ensure that the moving contact assembly 200 moves in place. After the second elastic member 600 returns to a stable state, the moving contact assembly 200 is maintained in the third position, and the moving contact 230 and the static contact 310 will be completely out of contact, achieving forced disconnection, and fundamentally solving the hidden danger of contact adhesion.

[0091] In the contactor of the present application, in order to achieve automatic control, the contactor includes a current transformer and a controller. The current transformer is configured to detect whether there is current between the moving contact 230 and the static contact 310 when the contactor is in a closed state; the controller is configured to control the state of the locking mechanism according to the detection result of the current transformer.

[0092] The current transformer is configured as a monitoring component for detecting whether there is still current between the moving contact 230 and the stationary contact 310 when the contactor is in the closed state (i.e., when the excitation coil 130 is de-energized). When the contactor is normally disconnected, the moving contact 230 is separated from the stationary contact 310, and the detection result of the current transformer should be no current; if the moving contact 230 and the stationary contact 310 cannot be separated due to adhesion problems, the current transformer will detect the presence of abnormal current.

[0093] The controller analyzes the operating status of the contactor, especially the connection status between the contacts, in real time based on the detection results of the current transformer. When a sticking problem is detected, the controller sends a signal command to the locking mechanism to trigger the locking mechanism to switch from the locked state to the unlocked state. The triggering of the unlocked state further activates the forced separation function of the contactor, and separates the sticking moving contact 230 from the static contact 310 through the action of the drive assembly (including the second elastic member 600), the first connecting member 510 and the second connecting member 240.

[0094] The current transformer can quickly detect abnormal current caused by contact adhesion, and the controller can automatically process the problem based on the detection results without manual intervention. Once the adhesion problem occurs, the contactor can automatically start the fault handling mechanism and force the moving and static contacts to separate 310, thereby effectively protecting the circuit and connected equipment and avoiding potential safety hazards such as arcs and overloads caused by contact adhesion. Through the coordinated work of the current transformer and the controller, the operating status of the contactor can be automatically monitored and controlled throughout the process, achieving efficient and accurate fault response.

[0095] As an optional implementation, Figure 7 and 8 As shown, the locking mechanism includes a driving member, an I-shaped key 151, a first key slot 152 and a second key slot 153, wherein the first key slot 152 is a T-shaped slot provided on the bracket 140, and the second key slot 153 is a T-shaped slot provided on the fixed armature 110, and the first key slot 152 and the second key slot 153 are symmetrically arranged, and when the fixed armature 110 and the bracket 140 are in a state of abutting each other, the first key slot 152 and the second key slot 153 are combined to form an I-shaped slot, and the I-shaped key 151 can be correspondingly inserted into the I-shaped slot to complete the locking of the bracket 140 and the fixed armature 110. The driving member is preferably a micro motor, which is used to drive the I-shaped key 151 to move along its extension direction, and the I-shaped key 151 can be inserted into or removed from the I-shaped slot during the movement along its extension direction.

[0096] The above-mentioned specific locking mechanism can realize locking and unlocking of the fixed armature 110 and the bracket 140, ensuring the reliable operation of the contactor, while improving the precision and reliability of the overall structure. The driving member is used to control the action of the I-key 151, and is preferably a micro motor, which can accurately drive the I-key 151 to move along its extension direction to achieve locking or unlocking action. The I-key 151 is an I-shaped mechanical locking component as the core, and is used to insert or remove the I-slot to achieve locking or unlocking of the bracket 140 and the fixed armature 110. The first key slot 152 is a T-slot provided on the bracket 140, which is used to fit a part of the I-key 151. The second key slot 153 is a T-slot provided on the fixed armature 110, which is symmetrically arranged with the first key slot 152, and is used to form a T-slot with the first key slot 152. Figure 8 When the fixed armature 110 and the bracket 140 are in a state of abutting each other, the first key slot 152 and the second key slot 153 are aligned and spliced ​​to form a complete I-shaped slot, and the I-shaped key 151 can be inserted into the I-shaped slot to complete the locking of the bracket 140 and the fixed armature 110, so that the fixed armature 110 and the bracket 140 form a stable connection.

[0097] In normal working mode, if Figure 8 In Figures A and B, the I-shaped key 151 is inserted into the I-shaped slot, and the I-shaped key 151 completes the locking of the fixed armature 110 and the bracket 140. The fixed armature 110 is fixedly connected to the bracket 140 and will not move due to the elastic force of the second elastic member 600. The moving contact assembly 200 can complete the closing and opening actions between the moving contact 230 and the static contact 310 by turning the excitation coil 130 on and off. When the contactor is abnormal (for example, Figure 8 As shown in Figure C, when the moving contact 230 and the static contact 310 are adhered, the controller receives the detection signal of the current transformer and sends a control instruction to the driving member, the driving member acts, and drives the I-shaped key 151 to escape from the I-shaped slot along its extension direction. At this time, the state is as follows Figure 8 As shown in Figure D, the unlocking between the fixed armature 110 and the bracket 140 is completed. Figure 8 As shown in Figure EG, the fixed armature 110, under the action of the second elastic member 600, pushes the moving contact assembly 200 to move, thereby forcibly separating the moving contact 230 and the static contact 310, solving the problem of contact adhesion. After the unlocking action is completed, if the normal operation of the contactor needs to be restored after troubleshooting, the fixed armature 110 can be reset to a state of abutment with the bracket 140 manually or through other mechanisms, and the first key slot 152 and the second key slot 153 are aligned and spliced ​​to form a complete I-shaped slot. The driving member can drive the I-shaped key 151 to move in the opposite direction along its extension direction again, so that the I-shaped key 151 is re-engaged in the I-shaped slot, and the locking state of the fixed armature 110 and the bracket 140 is restored.

[0098] Through the above design, the locking mechanism can accurately control the connection state between the fixed armature 110 and the bracket 140 of the contactor, providing an efficient and reliable technical solution to solve the problem of contact adhesion, while ensuring the long-term stable operation of the contactor.

[0099] Some embodiments in this specification are described in a progressive or parallel manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other.

[0100] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A contactor, characterized in that: include: The electromagnetic assembly comprises a fixed armature, an iron core and an excitation coil sleeved on the iron core; A movable contact assembly, comprising a movable armature, a conductive beam and a movable contact, wherein the movable armature is connected to a side of the conductive beam facing away from the fixed armature, and the movable contact is connected to a side of the conductive beam facing the fixed armature; A static contact assembly, comprising a static contact disposed between the movable contact assembly and the fixed armature and disposed directly opposite to the movable contact; A first elastic member, disposed between the moving contact assembly and the fixed portion; When the excitation coil is energized, the fixed armature attracts the movable armature to move and drives the movable contact to a first position in contact with the static contact. When the excitation coil is deenergized, the first elastic member drives the movable contact to a second position away from the static contact.

2. The contactor according to claim 1, characterized in that: The moving contact assembly includes two moving contacts, which are distributed at two ends of the conductive beam, and the stationary contacts in the stationary contact assembly are arranged in one-to-one correspondence with the moving contacts.

3. The contactor according to claim 1, characterized in that: The movable armature and the movable contact are arranged in a one-to-one correspondence.

4. The contactor according to claim 1, characterized in that: The contactor is an AC contactor, and three groups of the moving contact assembly and the static contact assembly are respectively provided.

5. The contactor according to any one of claims 1 to 4, characterized in that: The fixing portion is provided with a first connecting member, and the moving contact assembly is provided with a second connecting member. When the moving contact assembly moves toward or away from the stationary contact, the first connecting member and the second connecting member can be matched and connected. When the first connecting member and the second connecting member are matched and connected, the moving contact is limited to a third position. The contactor further includes a driving component configured to drive the movable contact to move so that the movable contact is restricted to the third position by the first connecting member and the second connecting member.

6. The contactor according to claim 5, characterized in that: The electromagnetic assembly further comprises a bracket and a locking mechanism, and the driving assembly comprises a second elastic member; When the locking mechanism is in a locked state, the fixed armature is locked and connected to the bracket through the locking mechanism, and the second elastic member is in an energy storage state and has a tendency to make the fixed armature move toward the moving contact assembly; When the locking mechanism is in an unlocked state, the fixed armature and the bracket are unlocked, and the fixed armature moves toward the moving contact assembly under the action of the second elastic member and pushes the moving contact to at least the third position, and the second position is located between the first position and the third position.

7. The contactor according to claim 6, characterized in that: The stationary contact assembly is fixedly connected to the fixed armature. When the locking mechanism is in an unlocked state, the fixed armature pushes the movable contact to move through the stationary contact assembly under the action of the second elastic member.

8. The contactor according to claim 7, characterized in that: When the locking mechanism is in the unlocked state, after the second elastic member returns to a stable state, the static contact is out of contact with the moving contact in the third position.

9. The contactor according to claim 6, characterized in that: The first connecting member and the second connecting member are both hooks, the first connecting member is a hook with an opening facing away from the fixed armature, and the second connecting member is a hook with an opening facing the fixed armature; or The first connecting member and the second connecting member are both magnetic members; or The first connecting member and the second connecting member are both buckles.

10. The contactor according to any one of claims 6 to 9, characterized in that: Also includes: a current transformer, configured to detect whether there is current between the moving contact and the stationary contact when the contactor is in a closed state; A controller is configured to control the state of the locking mechanism according to the detection result of the current transformer.

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