A novel magnetic core-based anti-slip contactor

Abstract

This application provides an anti-slip contactor based on a novel magnetic core, comprising a fixed base and an upper housing. An E-type magnetic control mechanism is fixed inside the fixed base. A contact mounting seat is connected to the top of the E-type magnetic control mechanism. A groove is formed in the contact mounting seat, and a double-contact moving contact piece is installed at the bottom of the groove. The top of the double-contact moving contact piece is connected to one end of a contact pressure spring, and the other end of the contact pressure spring is connected to the top of the groove. Two fixed contact pieces are provided below the double-contact moving contact piece to cooperate with it. This application improves upon existing magnetic control mechanisms and electromagnet-type contactors, ensuring that the magnetic control switch can be used in low-voltage scenarios, guaranteeing stability, and enabling the product to have anti-slip performance and low power consumption. Furthermore, this application adopts a double break, resulting in strong arc extinguishing capability.

Description

Technical Field

[0001] This application relates to the field of contactor technology, and specifically to an anti-slip contactor based on a novel magnetic core. Background Technology

[0002] The core function of contactors for low-voltage 750V and below power grids is to connect / disconnect main circuits or high-capacity control circuits at long distances and frequently. They are suitable for various applications including industry, new energy, transportation, and energy storage. Most of these contactors are electromagnet-type, with moving and stationary iron cores attracting each other. Their main material is soft magnetic material. Electromagnet-type contactors are low-cost and meet the economic requirements of low-voltage scenarios, thus they are widely used in cost-sensitive low-voltage distribution networks. However, electromagnets only generate attraction force when current flows through their control coil. Therefore, when the external coil power supply fails or experiences a sudden voltage drop, the electromagnet will trip and release the load, leading to an unexpected power outage. This is the contactor's anti-voltage fluctuation performance that the industry is concerned about, and it has become a key bottleneck restricting its application in low-voltage scenarios where power supply continuity is crucial.

[0003] As distribution network technology expands into the medium-voltage field, higher requirements are placed on the stability and reliability of switchgear. Magnetic switches, due to their superior stability and the fact that they do not require continuous power to maintain their state, are gradually being promoted and applied in medium-voltage distribution networks. Their core principles and reliability have been verified through real-world scenarios, solving to some extent the problem of electromagnet-type equipment relying on continuous power supply. However, current mainstream magnetic switches still have significant limitations, making it difficult to adapt them to low-voltage scenarios. Structurally, existing magnetic control mechanisms all adopt a cylindrical design, with both the moving and stationary iron cores made of semi-hard magnetic materials. Furthermore, the moving iron core needs to achieve integrated movement in the same direction through a connecting rod that passes through the stationary iron core. This structure directly results in a large outer diameter of the magnetic control mechanism, which requires a large installation space and cannot be adapted to the compact distribution boxes and small control units commonly found in low-voltage scenarios. In terms of cost, the complex linkage structure and the processing technology of semi-hard magnetic materials make the manufacturing cost of cylindrical magnetic control mechanisms much higher than that of traditional electromagnet-type contactors, making it difficult to meet the core demand for economy in low-voltage scenarios.

[0004] In summary, there is a need to provide a contactor that is highly stable, small in size, low in cost, and suitable for low-voltage scenarios to solve the above-mentioned technical problems; the applicant has reviewed the product in detail and has not found any relevant prior art.

[0005] Therefore, a new technical solution is needed to solve the above-mentioned technical problems. Utility Model Content

[0006] This application provides an anti-slip contactor based on a novel magnetic core, comprising a fixed base and an upper housing. An E-type magnetic control mechanism is fixed inside the fixed base. A contact mounting base is connected to the top of the E-type magnetic control mechanism. A groove is formed in the contact mounting base. A double-contact moving contact piece is installed at the bottom of the groove. The top of the double-contact moving contact piece is connected to one end of a contact pressure spring, and the other end of the contact pressure spring is connected to the top of the groove. Two fixed contact pieces are provided below the double-contact moving contact piece to cooperate with it.

[0007] As a preferred option, the fixed contact piece is snapped into the contact piece mounting groove of the upper housing.

[0008] As a preferred option, when the rated current of the product exceeds 80A, each of the two contact pieces of the double-contact moving contact piece corresponds to an air arc-extinguishing grid, the contact end of the double-contact moving contact piece is aligned with the inlet of the air arc-extinguishing grid, and the movement trajectory of the double-contact moving contact piece covers the inlet of the air arc-extinguishing grid.

[0009] As a preferred embodiment, the two fixed contact plates are equipped with wire clamping screws.

[0010] As a preferred embodiment, the contact mounting base is made of insulating material.

[0011] As a preferred embodiment, the E-type magnetic control mechanism includes an E-type stationary iron core installed at the bottom of a fixed base, an excitation coil mounted on the E-type stationary iron core, an E-type moving iron core that cooperates with the E-type stationary iron core at the top, and a contact mounting seat mounted on the top of the E-type moving iron core; a tripping device is installed on both sides of the E-type stationary iron core and the E-type moving iron core, and the E-type stationary iron core and the E-type moving iron core are made of semi-hard magnetic material.

[0012] As a preferred embodiment, the tripping device includes a tripping spring mounting seat one installed on both sides of the E-type stationary iron core and a tripping spring mounting seat two installed on both sides of the E-type moving iron core, with a tripping spring installed between the tripping spring mounting seat one and the tripping spring mounting seat two.

[0013] As a preferred embodiment, a fixing plate is installed between the inner bottom of the fixed base and the E-type stationary iron core.

[0014] As a preferred embodiment, the E-type static iron core includes a rectangular static magnetic core body, on which two static coil slots are formed symmetrically about the middle plane of the static magnetic core body, and the static magnetic core body between the two static coil slots is the middle part of the static magnetic core; an excitation coil is installed in the static coil slot.

[0015] As a preferred embodiment, the E-type moving iron core includes a rectangular moving core body, on which two moving coil slots are formed symmetrically about the middle plane of the moving core body, and the moving core body between the two moving coil slots is the middle part of the moving core; the moving coil slots are engaged with the excitation coil.

[0016] As a preferred embodiment, the static magnetic core body has fixing holes on both sides, and a gate spring mounting seat is installed in the fixing holes on both sides of the static magnetic core body.

[0017] As a preferred embodiment, the moving magnetic core body has fixing holes on both sides, and a second gate spring mounting seat is installed in the fixing holes on both sides of the moving magnetic core body.

[0018] This application has the following advantages: 1. Improve the existing magnetic control mechanism and electromagnet type contactor to ensure that the magnetic control switch can be used in low-voltage scenarios; while ensuring stability, the product has anti-voltage fluctuation performance and low power consumption performance.

[0019] 2. This application employs a double fracture surface, resulting in strong arc-extinguishing capability; 3. Enables simple replacement and upgrade at low cost, while satisfying the advantages of low cost, energy saving, long life, and strong arc extinguishing capability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a schematic diagram of the structure of this application with an air arc-extinguishing grid; Figure 3 This is a structural schematic diagram of a type E stationary iron core; Figure 4 This is a structural schematic diagram of an E-type moving iron core; 1. Fixed base shell; 2. Upper shell; 3. Sliding groove; 4. Fixing plate; 5. Contact mounting base; 6. Groove; 7. Double-contact moving contact piece; 8. Contact pressure spring; 9. Fixed contact piece; 10. Type E stationary iron core; 11. Excitation coil; 12. Type E moving iron core; 13. Opening spring mounting base one; 14. Opening spring mounting base two; 15. Opening spring; 16. Stationary magnetic core body; 17. Stationary coil groove; 18. Middle part of stationary magnetic core; 19. Fixing hole; 20. Moving magnetic core body; 21. Moving coil groove; 22. Middle part of moving magnetic core; 23. Wire clamping screw; 24. Air arc extinguishing grid. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 The specific embodiments of this utility model will be described in detail below. It should be noted that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model. Example 1

[0022] This embodiment provides an anti-slip contactor based on a novel magnetic core, including a fixed base shell 1 and an upper shell 2. The upper shell 2 has a sliding groove 3. A fixing plate 4 is installed on the bottom inner side of the fixed base shell 1, and an E-type magnetic control mechanism is installed on the fixing plate 4. The opening and closing action of this application is driven by the E-type magnetic control mechanism. A contact mounting seat 5 is connected to the top of the E-type magnetic control mechanism. The contact mounting seat 5 is disposed in the sliding groove 3 and is made of insulating material. The contact mounting seat 5 can slide up and down in the sliding groove 3 of the upper shell 2. A groove 6 is provided in the contact mounting seat 5. A double-contact moving contact piece 7 is installed at the bottom of the groove 6. The top of the double-contact moving contact piece 7 is connected to one end of a contact pressure spring 8, and the other end of the contact pressure spring 8 is connected to the top of the groove 6. The connection is achieved by a contact pressure spring 8 with a certain preload, pressing the double-contact moving contact piece 7 into the groove 6 of the contact mounting base 5. Two fixed contact pieces 9 are provided at the lower part of the double-contact moving contact piece 7, which are engaged with it. These two fixed contact pieces 9 are snapped into the contact piece mounting groove of the upper housing 2. Preferably, a wire-pressing screw 23 is installed on the two fixed contact pieces 9. The wire-pressing screw 23 is used to press the external wire and can also limit the movement of the fixed contact pieces 9 to prevent them from moving left or right. When the E-type magnetic control mechanism closes, the double-contact moving contact piece 7 moves downward with the contact mounting base 5, and the double-contact moving contact piece 7 contacts the fixed contact pieces 9. When the E-type magnetic control mechanism opens, the contact mounting base 5 drives the double-contact moving contact piece 7 upward, separating it from the fixed contact pieces 9, thus achieving the opening of the circuit.

[0023] Furthermore, when the rated current of the product exceeds 80A, an arc-extinguishing mechanism needs to be added, such as... Figure 2 As shown, each of the two double-contact moving contact pieces 7 corresponds to an air arc extinguishing grid 24. The contact end of the double-contact moving contact piece is aligned with the inlet of the air arc extinguishing grid 24, and the movement trajectory of the double-contact moving contact piece covers the inlet of the air arc extinguishing grid 24. Figure 2 The air arc extinguishing grid 24 in the diagram is for illustrative purposes only. In practice, it can be any form of air arc extinguishing grid 24. The air arc extinguishing grid 24 is a mature existing technology, and this application does not make any improvements to it. It will not be described in detail here. Example 2

[0024] This embodiment describes the E-type magnetic control mechanism, specifically: The E-type magnetic control mechanism includes an E-type stationary iron core 10 mounted on a fixed plate 4, an excitation coil 11 mounted on the E-type stationary iron core 10, and an E-type moving iron core 12 that cooperates with it on the upper part of the E-type stationary iron core 10. A contact mounting seat 5 is mounted on the upper part of the E-type moving iron core 12. The E-type stationary iron core 10 and the E-type moving iron core 12 are made of semi-hard magnetic material, and the magnetic force remains stable after excitation. Contact mounting seats 5 are installed on both sides of the E-type stationary iron core 10 and the E-type moving iron core 12. The device is equipped with a tripping device. Specifically, the tripping device includes a tripping spring mounting seat 13 installed on both sides of the E-type stationary iron core 10 and a tripping spring mounting seat 24 installed on both sides of the E-type moving iron core 12. A tripping spring 15 is installed between the tripping spring mounting seat 13 and the tripping spring mounting seat 24. The tripping spring mounting seat 13 is connected to the E-type stationary iron core 10 by screws or the like. Similarly, the tripping spring mounting seat 24 is also connected to the E-type moving iron core 12 by screws or the like.

[0025] When the E-type magnetic control mechanism is in the open state, the E-type moving iron core 12 and the E-type stationary iron core 10 compress the opening spring 15 to generate a certain preload. When closing, the excitation coil 11 induces a magnetic field, and the E-type moving iron core 12 overcomes the elastic force of the opening spring 15 and moves downward, attracting the E-type moving iron core 12. When the E-type magnetic control mechanism is closed, the opening spring 15 is compressed, and the double-contact moving contact piece 7 moves downward together with the contact mounting base 5. The double-contact moving contact piece 7 contacts the two fixed contact pieces 9, realizing the closing of the contactor. When the E-type magnetic control mechanism is open, the excitation coil 11 is demagnetized, the compression potential energy of the opening spring 15 is released, the E-type moving iron core 12 is quickly pushed upward, and the contact mounting base 5 drives the double-contact moving contact piece 7 to move upward. The double-contact moving contact piece 7 separates from the fixed contact pieces 9, realizing the opening of the contactor. Example 3

[0026] This embodiment describes the specific structure of the E-type stationary iron core 10 and the E-type moving iron core 12: The E-type static iron core 10 includes a rectangular static magnetic core body 16. The static magnetic core body 16 is made of semi-hard magnet. Two static coil slots 17 are formed on the static magnetic core body 16 symmetrical about the middle plane of the static magnetic core body 16. The static magnetic core body 16 between the two static coil slots 17 is the middle part 18 of the static magnetic core. An excitation coil 11 is installed in the static coil slot 17. Fixing holes 19 are provided on both sides of the static magnetic core body 16. A breaker spring mounting seat 13 is installed in the fixing holes 19 on both sides of the static magnetic core body 16.

[0027] The E-type moving iron core 12 includes a rectangular moving magnetic core body 20. The moving magnetic core body 20 is made of semi-hard magnet. Two moving coil slots 21 are provided on the moving magnetic core body 20, which are symmetrical about the middle plane of the moving magnetic core body 20. The moving magnetic core body 20 between the two moving coil slots 21 is the moving magnetic core middle part 22. The moving coil slots 21 cooperate with the excitation coil 11. Fixing holes 19 are provided on both sides of the moving magnetic core body 20. The opening spring mounting seat 14 is installed in the fixing holes 19 on both sides of the moving magnetic core body 20. When the circuit is closed, the end of the moving magnetic core middle part 22 contacts the end of the stationary magnetic core middle part 18.

[0028] This solution is particularly suitable for designing PC-level dual power supplies. If the switching elements inside a PC-level dual power supply adopt this solution, they are still protected by this patent.

[0029] In summary, this application features a double-break circuit, thus possessing strong arc-extinguishing capability. According to the above principle, the contactor's closing is maintained by the magnetic force generated after the magnetic core is energized. After closing, the coil does not require continuous external power supply, thereby satisfying the anti-voltage fluctuation performance and achieving energy-saving effect.

[0030] This application has the following advantages: 1. Based on the semi-hard magnetic core of our company's patent application and authorization, patent application number 2024221996420, combined with the overall structure of the existing contactor, the E-type magnetic control mechanism is matched to the anti-slip requirements of the contactor, replacing the soft magnetic E-type core, realizing a low-cost and simple replacement upgrade, while meeting the advantages of low cost, anti-slip, energy saving, long life and strong arc extinguishing ability; 2. This application adopts a double break, which has a strong arc extinguishing ability.

[0031] The devices and connections not specifically described above are all existing technologies, and will not be described in detail here.

[0032] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0033] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, the various possible combinations in this application will not be described separately.

[0034] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of this application, and such combinations should also be regarded as the content disclosed in this application.

Claims

1. A new core based anti-inrush contactor comprising a fixed base housing (1) and an upper housing (2), characterized in that, An E-type magnetic control mechanism is fixed inside the fixed base shell (1). A contact mounting seat (5) is connected to the top of the E-type magnetic control mechanism. A groove (6) is provided on the contact mounting seat (5). A double-contact moving contact piece (7) is installed at the bottom of the groove (6). The top of the double-contact moving contact piece (7) is connected to one end of the contact pressure spring (8), and the other end of the contact pressure spring (8) is connected to the top of the groove (6). Two fixed contact pieces (9) are provided at the lower part of the double-contact moving contact piece (7) to cooperate with it.

2. The anti-slip contactor based on a novel magnetic core according to claim 1, characterized in that, The fixed contact piece (9) is snapped into the contact piece mounting groove of the upper housing (2).

3. The anti-slip contactor based on a novel magnetic core according to claim 1, characterized in that, When the rated current of the product exceeds 80A, the two contact pieces of the double-contact moving contact piece (7) correspond to an air arc extinguishing grid (24) respectively. The contact end of the double-contact moving contact piece (7) is aligned with the inlet of the air arc extinguishing grid (24), and the movement trajectory of the double-contact moving contact piece (7) covers the inlet of the air arc extinguishing grid (24).

4. The anti-slip contactor based on a novel magnetic core according to claim 1, characterized in that, The contact mounting base (5) is made of insulating material.

5. The anti-slip contactor based on a novel magnetic core according to claim 1, characterized in that, The E-type magnetic control mechanism includes an E-type stationary iron core (10) installed on the bottom inner side of the fixed base shell (1), an excitation coil (11) installed on the E-type stationary iron core (10), an E-type moving iron core (12) that cooperates with the E-type stationary iron core (10), and a contact mounting seat (5) installed on the upper part of the E-type moving iron core (12); a tripping device is installed on both sides of the E-type stationary iron core (10) and the E-type moving iron core (12); the E-type stationary iron core (10) and the E-type moving iron core (12) are made of semi-hard magnetic material.

6. The anti-slip contactor based on a novel magnetic core according to claim 5, characterized in that, The tripping device includes a tripping spring mounting seat one (13) installed on both sides of the E-type stationary iron core (10) and a tripping spring mounting seat two (14) installed on both sides of the E-type moving iron core (12). A tripping spring (15) is installed between the tripping spring mounting seat one (13) and the tripping spring mounting seat two (14).

7. A novel magnetic core-based anti-slip contactor according to claim 5, characterized in that, The E-type static iron core (10) includes a rectangular static magnetic core body (16), on which two static coil slots (17) are provided symmetrically about the middle plane of the static magnetic core body (16), and the static magnetic core body (16) between the two static coil slots (17) is the middle part (18) of the static magnetic core; an excitation coil (11) is installed in the static coil slot (17).

8. A novel magnetic core-based anti-slip contactor according to claim 7, characterized in that, The static magnetic core body (16) has fixing holes (19) on both sides, and a spring mounting seat (13) is installed in the fixing holes (19) on both sides of the static magnetic core body (16).

9. A novel magnetic core-based anti-slip contactor according to claim 5, characterized in that, The E-type moving iron core (12) includes a rectangular moving magnetic core body (20), on which two moving coil slots (21) are provided symmetrically about the middle plane of the moving magnetic core body (20), and the moving magnetic core body (20) between the two moving coil slots (21) is the middle part (22) of the moving magnetic core; the moving coil slots (21) are matched with the excitation coil (11).

10. A novel magnetic core-based anti-slip contactor according to claim 9, characterized in that, The moving magnetic core body (20) has fixing holes (19) on both sides, and the two opening spring mounting seats (14) are installed in the fixing holes (19) on both sides of the moving magnetic core body (20).

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