Magnetic drive arc structure and direct current arc extinguishing system

Abstract

The utility model relates to the technical field of low-voltage electric appliances, in particular to a magnetic drive arc structure and a direct current arc extinguishing system, which comprise an arc extinguishing chamber, a static arc angle is arranged on one side of the arc extinguishing chamber, the static arc angle is connected with a static conducting rod, and a static contact is arranged on the static conducting rod; the other side of the arc extinguish chamber is provided with a movable arc angle and is sequentially connected with a movable contact and a movable conducting rod; a first magnetizer and a first permanent magnet are sequentially arranged on the static conducting rod; a second permanent magnet and a second magnetizer are sequentially arranged on the movable arc angle; the polarities of the opposite polar surfaces of the first permanent magnet and the second permanent magnet are opposite. Through cooperation of the two magnetizers, the two permanent magnets, the moving arc angle and the static arc angle, special three-dimensional magnetic field distribution is generated in the arc motion chamber, direct current arcs in two directions can rapidly move towards the arc extinguish chamber, breaking of high-voltage non-polarity direct current is achieved, the structure is simple, and cost is low. The problems that in the prior art, a high-voltage electrodeless direct current breaking structure is complex in design and high in cost are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electric appliance technical field relates to a low voltage direct current arc extinguishing technology, specifically relates to an optimized magnetic drive arc structure and direct current arc extinguishing system. BACKGROUND

[0002] In a photovoltaic system, the DC side mainly includes photovoltaic modules, DC combiner boxes, DC distribution cabinets, and inverters, etc. Since the direction of DC current generated by photovoltaic modules during power generation is fixed (from the positive pole to the negative pole of the photovoltaic module), but in the system maintenance, troubleshooting or special operating conditions, it may be necessary to break the DC circuit without polarity. At this time, the control and protection electrical appliances (such as DC circuit breakers, disconnectors, etc.) on the DC side need to have the ability to break the non-polar current to ensure the safe and stable operation of the system.

[0003] In the charging and discharging process of energy storage systems (such as battery energy storage systems), the direction of DC current will change. During charging, the current flows from the power grid or other power sources to the energy storage battery; during discharging, the current flows from the energy storage battery to the load or the power grid. Therefore, the control and protection electrical appliances on the DC side of the energy storage system also need to have the ability to break the non-polar current to adapt to the frequent changes in the direction of the current. These electrical appliances should not be affected by the direction of the current when breaking the current, but should be able to quickly and reliably cut off the circuit to prevent the fault from expanding or causing damage to the equipment.

[0004] Therefore, both photovoltaic and energy storage systems require DC-side control and protection devices to interrupt non-polar currents. Traditional interruption methods typically use permanent magnets to drive the arc, elongating it and guiding it into the arc-extinguishing chamber, thus increasing the arc voltage and interrupting the arc. This method can only interrupt polarized DC currents with a fixed current direction. However, non-polarized DC currents do not distinguish between current directions. Therefore, the permanent magnet solution used for interrupting polarized DC currents cannot be used for interrupting non-polarized DC currents without a fixed current direction. Existing solutions for non-polar DC current interruption include increasing the contact gap, using gas-generating materials, and employing narrow-slit arc extinguishing. Increasing the contact gap reduces the arc's sustaining voltage, making it easier to extinguish, but requires significant space and has limited effectiveness at high voltages. Using gas-generating materials generates a large amount of gas under the influence of the arc, extinguishing it through cooling and dilution. However, the selection and preparation of these materials are complex and may produce harmful gases. Narrow-slit structures divide the arc into multiple segments, increasing the arc's heat dissipation area and resistance to accelerate extinguishing, but this design is complex and requires high-quality materials. Therefore, while increasing the contact gap, using gas-generating materials, and employing narrow-slit arc extinguishing can improve breaking capacity to some extent, they often come at the cost and size. Achieving DC current interruption at higher voltages typically requires significant cost and volume, resulting in poor economic efficiency. Utility Model Content

[0005] To address the problems of complex design and high cost of high-voltage stepless DC current breaking structures in existing technologies, this utility model provides a magnetically driven arc structure and a DC arc extinguishing system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a magnetically driven arc structure, including an arc-extinguishing chamber. A stationary arc angle is provided on one side of the arc-extinguishing chamber, and a stationary conductive rod is connected to the stationary arc angle. A stationary contact is provided on the stationary conductive rod. A moving arc angle is provided on the other side of the arc-extinguishing chamber, and a moving contact and a moving conductive rod are connected in sequence. A first arc-isolating wall is provided on one side of the corresponding position of the moving contact and the stationary contact, and a second arc-isolating wall is provided on the other side. The first arc-isolating wall and the second arc-isolating wall are arranged opposite to each other.

[0008] On the side of the stationary conductive rod away from the dynamic arc angle, relative to the stationary contact, a first magnetic conductor and a first permanent magnet are sequentially arranged.

[0009] A second permanent magnet and a second magnetic conductor are sequentially arranged on the side of the moving arc angle away from the stationary arc angle; the polarity of the polarity surface of the first permanent magnet facing the moving arc angle is opposite to the polarity surface of the second permanent magnet facing the stationary arc angle.

[0010] Optionally, the first magnetic conductor is in a U-shaped structure, and an opening of the U-shaped structure faces the static contact.

[0011] Optionally, an end surface of the U-shaped structure of the first magnetic conductor is higher than the static contact.

[0012] Optionally, a width of the opening of the U-shaped structure of the first magnetic conductor is greater than or equal to a width of the static contact.

[0013] Optionally, the second magnetic conductor comprises a U-shaped part, two walls of the U-shaped part are respectively connected with a connecting arm, and the connecting arm is connected with an arc-shaped wall.

[0014] Optionally, the arc-shaped wall extends from a region between the moving contact and the static contact to a brim of the arc-extinguishing chamber.

[0015] Optionally, the two walls of the U-shaped part, the connecting arm and the arc-shaped wall are all located outside the first arc separation wall and the second arc separation wall.

[0016] Optionally, the first magnetic conductor and the second magnetic conductor are made of ferromagnetic material.

[0017] Optionally, there is a gap between the first magnetic conductor and the second magnetic conductor or the first magnetic conductor and the second magnetic conductor are separated by an insulating material.

[0018] The utility model also provides a direct current arc extinguishing system, including magnetic drive arc structure above.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model relates to a kind of magnetic drive arc structures, including arc-extinguishing chamber, the one side of arc-extinguishing chamber is provided with static arc angle, static arc angle is connected with static conducting rod, and static contact is provided on static conducting rod;The other side of arc-extinguishing chamber is provided with dynamic arc angle, and dynamic arc angle is sequentially connected dynamic contact and dynamic conducting rod;The side of corresponding position of dynamic contact and static contact is provided with first arc separation wall, and the other side is provided with second arc separation wall, and the first arc separation wall and the second arc separation wall are oppositely arranged;The side of static conducting rod away from dynamic arc angle is sequentially provided with first magnet conductor and first permanent magnet relative to the position of static contact;Dynamic arc angle is sequentially provided with second permanent magnet and second magnet conductor away from static arc angle side;The polarity of the polarity face of the side of first permanent magnet towards dynamic arc angle is opposite to the polarity of the polarity face of the side of second permanent magnet towards static arc angle.In the course of non-polarity direct current breaking, with the polarity face of the side of first permanent magnet facing dynamic arc angle as N pole as an example, after first permanent magnet magnetizes first magnet conductor, first magnet conductor presents N pole;The polarity face of second permanent magnet close to static arc angle is S pole, and dynamic arc angle presents S pole to the side of dynamic arc angle facing static arc angle under the magnetization of the other polarity face of second permanent magnet;After second magnet conductor is magnetized by polarity face, two side walls of second magnet conductor present N pole.Under the magnetic field of above-mentioned construction, there is magnetic field component parallel to arc separation wall plane and pointing to dynamic arc angle direction in arc movement chamber, and it is called first magnetic field component;There is also magnetic field component perpendicular to first arc separation wall and pointing to second arc separation wall, and it is called second magnetic field component, and there is magnetic field component perpendicular to second arc separation wall and pointing to first arc separation wall, and it is called third magnetic field component.If the current direction of direct current arc is pointed to static contact from dynamic contact, then arc will be inclined to first arc separation wall under the magnetic field force generated by first magnetic field component, and then moves to arc-extinguishing chamber direction along the surface of first arc separation wall under the action of second magnetic field component;Conversely, if the current direction of direct current arc is pointed to dynamic contact from static contact, then arc will be inclined to second arc separation wall under the magnetic field force generated by first magnetic field component, and then moves to arc-extinguishing chamber direction along the surface of second arc separation wall under the action of third magnetic field component.Therefore, no matter the current direction of direct current arc, arc will move to arc-extinguishing chamber direction quickly under the magnetic field, to realize the breaking of direct current in each direction, simple structure, low modification cost, easy to realize, can better meet high-voltage direct current breaking, and good economy.

[0021] The first magnet conductor is U-shaped structure, and the opening of U-shaped structure faces static contact, compact structure, not only save most space, and can maximize magnetic force, obtain uniform and stable magnetic field, can better realize magnetic drive function.

[0022] The second magnetic conductor comprises a U-shaped part, two walls of the U-shaped part are respectively connected with connecting arms, and the connecting arms are connected with arc-shaped walls; the arc-shaped walls extend from a region between the moving contact and the stationary contact to the edge of the arc-extinguishing chamber. In addition to efficiently concentrating and conducting the magnetic field, the magnetic field distribution is further optimized, the magnetic field is more stable, energy loss is reduced, and overall performance is improved. The design of the arc-shaped walls helps to guide the arc generated between the moving contact and the stationary contact, and when the arc is generated, the arc-shaped walls can guide it into the arc-extinguishing chamber, thereby effectively reducing the damage of the arc to the contacts and the equipment.

[0023] The two walls of the U-shaped part, the connecting arms and the arc-shaped walls are located outside the first arc separation wall and the second arc separation wall, so that the arc and the second magnetic conductor are separated.

[0024] The first magnetic conductor and the second magnetic conductor are separated by a gap or an insulating material, so as to prevent magnetic short circuit and magnetic flux leakage, and make the magnetic flux flow more concentratedly through the predetermined path.

[0025] The utility model also provides a direct current arc extinguishing system which comprises the magnetic arc driving structure. Due to the magnetic field of the magnetic arc driving structure, the direct current arc extinguishing system can quickly guide the arc to the predetermined arc-extinguishing region, which helps to reduce the residence time of the arc in the contacts or the equipment, thereby reducing the damage to the equipment, has higher arc-extinguishing efficiency, and can significantly reduce the risk of damage of the contacts due to arc ablation, which has important significance for improving the service life and reliability of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a shaft side schematic view of the magnetic arc driving structure.

[0027] Figure 2 It is a front view of the magnetic arc driving structure.

[0028] Figure 3 It is a structure schematic view of the second magnetic conductor.

[0029] Figure 4 It is an arc voltage waveform of the magnetic arc driving structure not comprising the first permanent magnet and the first magnetic conductor under 500V direct current voltage, 2ms time constant and 63A current breaking.

[0030] Figure 5 It is an arc voltage waveform of the magnetic arc driving structure of the embodiment 2 under 500V direct current voltage, 2ms time constant and 63A current breaking.

[0031] Wherein, 1 - moving conductive rod, 2 - moving contact, 3 - moving arc horn, 4 - static conductive rod, 5 - static contact, 6 - static arc horn, 7 - first permanent magnet, 8 - first magnetic conductor, 9 - second permanent magnet, 10 - second magnetic conductor, 11 - first arc separation wall, 12 - second arc separation wall, 13 - arc extinguishing chamber, 101 - U-shaped part, 102 - connecting arm, 103 - arc-shaped wall. DETAILED DESCRIPTION

[0032] To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0036] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0037] In the description of the embodiments of the utility model, still need explaining, unless another explicit provision and limitation, if appearing term "arrangement", "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be two element inside the intercommunication. For ordinary skilled in the art, can understand the concrete meaning of the above-mentioned term in the utility model according to specific circumstances.

[0038] The utility model will be further explained in detail in combination with specific embodiments, and the explanation is not limitation.

[0039] Embodiment 1

[0040] Referring to Figure 1 And Figure 2 The utility model discloses a magnetic drive arc structure, including arc extinguishing chamber 13, one side of arc extinguishing chamber 13 is provided with static arc angle 6, static arc angle 6 is connected with static conducting rod 4, and static conducting rod 4 is provided with static contact 5;The other side of arc extinguishing chamber 13 is provided with dynamic arc angle 3, and dynamic arc angle 3 is connected dynamic contact 2 and dynamic conducting rod 1 in proper order;The side of corresponding position of dynamic contact 2 and static contact 5 is provided with first arc separation wall 11, and the other side is provided with second arc separation wall 12, and first arc separation wall 11 is oppositely arranged with second arc separation wall 12;The position of one side of static conducting rod 4 away from dynamic arc angle 3 is oppositely provided with first magnetoelectric body 8 and first permanent magnet 7 to static contact 5;The side of dynamic arc angle 3 away from static arc angle 6 is sequentially provided with second permanent magnet 9 and second magnetoelectric body 10;The polarity of the polarity of the side of first permanent magnet 7 towards dynamic arc angle 3 is opposite to the polarity of the polarity of the side of second permanent magnet 9 towards static arc angle 6.

[0041] In the process of non-polar DC breaking, the polarity face of the first permanent magnet 7 facing the moving arc angle 3 is taken as N pole as an example, the first magnetic conductor 8 presents N pole after being magnetized by the first permanent magnet 7; the polarity face of the second permanent magnet 9 close to the static arc angle 6 is S pole, the moving arc angle 3 presents S pole on the face facing the static arc angle 6 under the magnetization of the other polarity face of the second permanent magnet; the two side walls of the second magnetic conductor 10 present N pole after being magnetized by the polarity face.

[0042] Embodiment 2

[0043] Referring to Figure 1 and Figure 2 The utility model discloses a magnetic drive arc structure, including dynamic conducting pole 1, moving contact 2, dynamic arc angle 3, static conducting pole 4, static contact 5, static arc angle 6, first permanent magnet 7, first magnetic conductor 8, second permanent magnet 9, second magnetic conductor 10, first arc wall 11, second arc wall 12 and arc chamber 13,

[0044] The arc chamber 13 is located in the opening direction of the moving contact 2 and the static contact 5 in the open state, and is clamped between the static arc angle 6 and the dynamic arc angle 3.

[0045] The moving contact 2 is fixed on the dynamic conducting pole 1, the static contact 5 is fixed on the static conducting pole 4, and the static arc angle 6 is connected with one end of the static conducting pole 4 close to the arc chamber 13.

[0046] The first permanent magnet 7 and the first magnetic conductor 8 are fixedly installed on the side of the static arc corner 6 away from the dynamic arc corner 3, and the first magnetic conductor 8 is located between the first permanent magnet 7 and the static arc corner 6; the first magnetic conductor 8 has a U-shaped structure, and the U-shaped opening faces the dynamic arc corner 3 or the dynamic contact 2; the upper end of the first magnetic conductor 8 is higher than the upper end of the static contact 5, the static contact 5 is located in the opening direction of the U-shaped structure of the first magnetic conductor 8, the U-shaped opening width of the first magnetic conductor 8 is greater than or equal to the width of the static contact 5, and the static contact 5 coincides with the symmetry plane of the first magnetic conductor 8 along the U-shaped opening wall surface; the first polarity surface of the first permanent magnet 7 is the polarity surface close to the bottom outer side of the first magnetic conductor 8.

[0047] The second permanent magnet 9 and the second magnetic conductor 10 are fixedly installed on the side of the dynamic arc corner 3 away from the static arc corner 6, and the second permanent magnet 9 is located between the second magnetic conductor 10 and the dynamic arc corner 3; referring to Figure 3 , the second magnetic conductor 10 comprises a U-shaped part 101, two walls of the U-shaped part 101 are symmetrically arranged and are sequentially connected with a connecting arm 102 and an arc-shaped wall 103 respectively, and the opening direction of the U-shaped part 101 faces the static arc corner 6. The dynamic arc corner 3 is located inside the U-shaped part 101, and the bottom of the U-shaped part 101 sequentially comprises the second magnetic conductor 10 and the dynamic arc corner 3 in the direction of the static arc corner 6; the two side walls of the U-shaped part 101 are located outside the first arc separation wall 11 and the second arc separation wall 12 respectively, so as to separate the second magnetic conductor 10 from the electric arc; the arc-shaped wall 103 extends from the region between the dynamic contact 2 and the static contact 5 to the edge of the arc-extinguishing chamber 13; the first polarity surface of the second permanent magnet 9 faces the dynamic arc corner 3, the second polarity surface of the second permanent magnet 9 faces the bottom of the U-shaped part 101, and the polarity of the first polarity surface of the first permanent magnet 7 is opposite to that of the first polarity surface of the second permanent magnet 9.

[0048] There is a gap between the first magnetic conductor 8 and the second magnetic conductor 10, or the first magnetic conductor 8 and the second magnetic conductor 10 are separated by the insulating material of the first arc separation wall 11 and the second arc separation wall 12.

[0049] The first arc separation wall 11 and the second arc separation wall 12 are located on both sides of the corresponding positions of the dynamic contact 2 and the static contact 5.

[0050] Preferably, the materials of the first magnetic conductor 8 and the second magnetic conductor 10 are ferromagnetic materials.

[0051] Preferably, the materials of the first arc separation wall 11 and the second arc separation wall 12 are high-temperature-resistant gas-producing materials or non-gas-producing materials.

[0052] The working principle of the magnetic-driven electric arc structure provided by the embodiment is as follows:

[0053] Taking the first polarity surface of the first permanent magnet 7 as N-pole as an example: the U-shaped bottom surface of the first magnetic conductor 8 is magnetized by the first polarity surface of the first permanent magnet 7, and the bottom and the two side walls of the U-shaped structure of the first magnetic conductor 8 are all N-pole to the outside; the first polarity surface of the second permanent magnet 9 is S-pole, and the dynamic arc corner 3 is magnetized by the first polarity surface of the second permanent magnet 9, and the surface of the dynamic arc corner 3 facing the static arc corner 6 is S-pole; the second polarity surface of the second permanent magnet 9 is N-pole, and the inner bottom surface of the U-shaped part 101 of the second magnetic conductor 10 is magnetized by the second polarity surface of the second permanent magnet 9, and the two side walls of the U-shaped part 101 are N-pole. Under the magnetic field formed by the above-mentioned structure, there is a magnetic field component parallel to the arc separation wall plane and pointing to the dynamic arc corner 3 in the chamber formed by the dynamic contact 2, the static contact 5, the dynamic arc corner 3, the static arc corner 6, the first arc separation wall 11 and the second arc separation wall 12 in the arc movement chamber, which is called the first magnetic field component; there is also a magnetic field component perpendicular to the first arc separation wall 11 and pointing to the second arc separation wall 12, which is called the second magnetic field component, and a magnetic field component perpendicular to the second arc separation wall 12 and pointing to the first arc separation wall 11, which is called the third magnetic field component. If the current direction of the direct current arc is from the dynamic contact 2 to the static contact 5, the arc will deviate to the first arc separation wall 11 under the magnetic field force generated by the first magnetic field component, and then move along the surface of the first arc separation wall 11 to the direction of the arc extinguishing chamber 13 under the action of the second magnetic field component; on the contrary, if the current direction of the direct current arc is from the static contact 5 to the dynamic contact 2, the arc will deviate to the second arc separation wall 12 under the magnetic field force generated by the first magnetic field component, and then move along the surface of the second arc separation wall 12 to the direction of the arc extinguishing chamber 13 under the action of the third magnetic field component. Therefore, no matter how the current direction of the direct current arc is, the arc will move quickly to the direction of the arc extinguishing chamber 13 under the action of the above-mentioned magnetic field.

[0054] If the first polarity face of the first permanent magnet 7 is S-pole, the first polarity face of the second permanent magnet 9 is N-pole, correspondingly, the bottom and two side walls of the U-shaped structure of the first magnetic conductor 8 are all S-pole, the face of the moving arc corner 3 facing the static arc corner 6 is N-pole, and the two side walls of the U-shaped part 101 of the second magnetic conductor 10 are S-pole. In the arc movement chamber, there is a first magnetic field component parallel to the arc separation wall plane and pointing to the direction of the static arc corner 6, there is also a second magnetic field component perpendicular to the first arc separation wall 11 and away from the second arc separation wall 12, and a third magnetic field component perpendicular to the second arc separation wall 12 and away from the first arc separation wall 11. If the current direction of the direct current arc is from the moving contact 2 to the static contact 5, the arc will be deviated to the second arc separation wall 12 under the magnetic field force generated by the first magnetic field component, and then move quickly along the surface of the second arc separation wall 12 to the direction of the arc extinguishing chamber 13 under the action of the third magnetic field component; conversely, if the current direction of the direct current arc is from the static contact 5 to the moving contact 2, the arc will be deviated to the first arc separation wall 11 under the magnetic field force generated by the first magnetic field component, and then move quickly along the surface of the first arc separation wall 11 to the direction of the arc extinguishing chamber 13 under the action of the second magnetic field component.

[0055] Referring to Figure 4 and Figure 5 To further prove the beneficial effects of the above-mentioned magnetic-driven arc structure, it is assumed that only the second permanent magnet 9 and the second magnetic conductor 10 are used without adding the first permanent magnet 7 and the first magnetic conductor 8 as a match. In the area between the static contact 5 and the second magnetic conductor 10, a magnetic field component opposite to the second magnetic field component and the third magnetic field component will be generated. When the arc is deviated to one side of the arc separation wall under the action of the first magnetic field component, the arc near the static contact 5 and the static arc corner 6 will be subjected to the magnetic field force inhibiting the arc from moving to the direction of the arc extinguishing chamber 13, which is not conducive to the arc moving quickly to the direction of the arc extinguishing chamber 13. As shown in FIG. 6, Figure 4 FIG. 7 shows the arc voltage waveform under the condition of 500V direct current voltage, 2ms time constant and 63A current breaking, only using the second permanent magnet 9 and the second magnetic conductor 10 without adding the first permanent magnet 7 and the first magnetic conductor 8 as a match, Figure 5 FIG. 8 shows the arc voltage waveform under the condition of 500V direct current voltage, 2ms time constant and 63A current breaking, using the second permanent magnet 9 and the second magnetic conductor 10, and the first permanent magnet 7 and the first magnetic conductor 8. It can be seen that, Figure 4 under the condition of FIG. 7, the arc voltage exists a platform of about 200V in the early stage, which is because the arc movement is blocked, and Figure 5 under the condition of FIG. 8, the arc voltage does not stop and rises directly and quickly to more than 1300V until the arc is extinguished.

[0056] Embodiment 3

[0057] A direct current arc extinguishing system, comprising the magnetic-driven arc structure of the above-mentioned embodiment 1 or embodiment 2.

[0058] The direct-current arc extinguishing system can quickly guide the arc to the predetermined arc extinguishing area due to the magnetic field of the magnetic drive arc structure, which helps to reduce the residence time of the arc in the contact or the internal device, thereby reducing the damage to the device, has higher arc extinguishing efficiency, and can significantly reduce the risk of damage of the contact due to arc ablation.

[0059] In summary, the utility model provides a kind of optimized magnetic drive arc structure and direct-current arc extinguishing system, utilize two magnetic conductors, two permanent magnets and the cooperation of moving arc angle, static arc angle, produce special three-dimensional magnetic field distribution in arc movement chamber, two directions of direct-current arc will generate the magnetic field force driven to arc extinguishing chamber direction, make arc quickly move to arc extinguishing chamber 13 direction, this kind of fast guiding mechanism helps to reduce the residence time of the arc in the contact or the internal device, thereby reducing the damage to the device, and simple structure, low in cost, easily realized, can be better applicable to the breaking of high-voltage non-polarity direct current.

[0060] The above is only the preferred embodiment of the utility model, and does not limit the technical scheme of the utility model in any way, and those skilled in the art should understand that the technical scheme can be modified and replaced in several simple ways without departing from the spirit and principles of the utility model, and these modifications and replacements also belong to the protection scope covered by the claims.

Claims

1. A magnetic driven arc structure, characterized by, The arc-extinguishing chamber (13) is provided with a static arc horn (6) on one side, the static arc horn (6) is connected with a static conducting rod (4), and the static conducting rod (4) is provided with a static contact (5); the arc-extinguishing chamber (13) is provided with a dynamic arc horn (3) on the other side, the dynamic arc horn (3) is sequentially connected with a dynamic contact (2) and a dynamic conducting rod (1); the dynamic contact (2) and the static contact (5) are provided with a first arc separation wall (11) on one side of the corresponding position and a second arc separation wall (12) on the other side; the first arc separation wall (11) and the second arc separation wall (12) are oppositely arranged; The static conducting rod (4) is provided with a first magnetic conductor (8) and a first permanent magnet (7) on the side away from the dynamic arc horn (3) and opposite to the position of the static contact (5); The dynamic arc horn (3) is provided with a second permanent magnet (9) and a second magnetic conductor (10) on the side away from the static arc horn (6); the polarity of the polarity face of the first permanent magnet (7) on the side facing the dynamic arc horn (3) is opposite to the polarity of the polarity face of the second permanent magnet (9) on the side facing the static arc horn (6).

2. The magnetic driven arc structure of claim 1, wherein, The first magnetic conductor (8) is in a U-shaped structure, and the opening of the U-shaped structure faces the static contact (5).

3. The magnetic drive arc structure of claim 2, wherein, The end face of the U-shaped structure of the first magnetic conductor (8) is higher than the static contact (5).

4. The magnetic drive arc structure of claim 2, wherein, The opening width of the U-shaped structure of the first magnetic conductor (8) is greater than or equal to the width of the static contact (5).

5. The magnetic drive arc structure of claim 1, wherein, The second magnetic conductor (10) comprises a U-shaped part (101), two walls of the U-shaped part (101) are respectively connected with a connecting arm (102), and the connecting arm (102) is connected with an arc-shaped wall (103).

6. The magnetic drive arc structure of claim 5, wherein, The arc-shaped wall (103) extends from the area between the dynamic contact (2) and the static contact (5) to the edge of the arc-extinguishing chamber (13).

7. The magnetic drive arc structure of claim 5, wherein, The two walls of the U-shaped part (101), the connecting arm (102) and the arc-shaped wall (103) are all located outside the first arc separation wall (11) and the second arc separation wall (12).

8. The magnetic drive arc structure of claim 1, wherein, The materials of the first magnetic conductor (8) and the second magnetic conductor (10) are ferromagnetic materials.

9. The magnetic drive arc structure of claim 1, wherein, There is a gap between the first magnetic conductor (8) and the second magnetic conductor (10) or they are separated by an insulating material.

10. A direct current arc extinguishing system characterized by, The magnetic arc structure comprises the arc-extinguishing chamber (13) of any one of claims 1-9.

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