CN219303521U - Nonpolar magnetic field structure for driving electric arc to move - Google Patents
Nonpolar magnetic field structure for driving electric arc to move Download PDFInfo
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- CN219303521U CN219303521U CN202223448433.2U CN202223448433U CN219303521U CN 219303521 U CN219303521 U CN 219303521U CN 202223448433 U CN202223448433 U CN 202223448433U CN 219303521 U CN219303521 U CN 219303521U
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Abstract
The utility model discloses a nonpolar magnetic field structure for driving arc movement, which comprises a first permanent magnet and a second permanent magnet, wherein the first permanent magnet and the second permanent magnet are respectively arranged at two sides of a plane formed by opening and closing actions of a moving contact and a fixed contact, and the polar surface of the first permanent magnet is opposite to the end surface with the same polarity of the second permanent magnet. Through reasonable magnetic field structural design, realize all to the electric arc of arbitrary current direction to same direction drive, have practical meaning and theoretical value to low-voltage switchgear's performance promotion.
Description
Technical Field
The utility model belongs to the technical field of piezoelectric devices, and particularly relates to a nonpolar magnetic field structure for driving electric arc motion.
Background
The arc plasma is an indispensable part of a low-voltage switching device, and when the high current is broken by a low-voltage electrical device switch, an arc is inevitably generated between a moving contact and a fixed contact. The temperature of arc plasma is very high, typically several thousands to tens of thousands, and therefore, an important technical research in the field of low-voltage switching appliances is directed to the driving and extinguishing technique of the arc.
Arc plasmas are high-temperature and conductive gases, so that the arc plasmas can be controlled through electric fields, magnetic fields and airflow fields, and at present, the movement of the arc in a low-voltage switching device is also continuously tried to be regulated through various electric field, magnetic field and airflow field structures. The external magnetic field has directionality, such as the direction of current changes, and the direction of driving force (lorentz force) of the magnetic field to the electric arc also changes, so that the electric arc determining the current direction is generally controlled by the external magnetic field in the prior art. If the electric arc in any current direction can be driven in the same direction through reasonable magnetic field structural design, the electric arc generator has practical significance and theoretical value for improving the performance of the low-voltage switch electric appliance.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides a nonpolar magnetic field structure for driving electric arcs to move, which is used for solving the technical problems of insufficient driving of an electromagnetic field and an airflow field of the electric arcs and great difficulty in further optimization in the development of high-performance and miniaturized low-voltage switching appliances, and realizing the driving of the electric arcs in any current direction in the same direction.
The utility model adopts the following technical scheme:
the nonpolar magnetic field structure for driving the arc motion comprises a first permanent magnet and a second permanent magnet, wherein the first permanent magnet and the second permanent magnet are respectively arranged at two sides of a plane formed by opening and closing actions of a moving contact and a fixed contact, and the polar surface of the first permanent magnet is opposite to the end surface with the same polarity of the second permanent magnet.
Specifically, the first permanent magnet is arranged on the first magnetic conduction plate, and the second permanent magnet is arranged on the second magnetic conduction plate.
Further, one ends of the first magnetic conduction plate and the second magnetic conduction plate extend towards the opening direction of the opening state of the moving contact and the fixed contact respectively.
Further, one side of the first magnetic conduction plate far away from the first permanent magnet is provided with a first magnetic conduction plate cover plate, and one side of the second magnetic conduction plate far away from the second permanent magnet is provided with a second magnetic conduction plate cover plate.
Further, one end of the first magnetic conduction plate is covered on the first polar surface of the first permanent magnet, the first magnetic conduction plate is positioned between the first permanent magnet and the moving contact and the fixed contact, one end of the second magnetic conduction plate is covered on the first polar surface of the second permanent magnet, and the second magnetic conduction plate is positioned between the second permanent magnet and the moving contact and the fixed contact.
Specifically, the first polar surface of the first permanent magnet and the first polar surface of the second permanent magnet have the same polarity.
Specifically, the moving contact comprises a moving contact and a moving contact conductive part, the fixed contact comprises a fixed contact and a fixed contact conductive part, the moving contact and the fixed contact are oppositely arranged and are respectively positioned at one ends of the moving contact conductive part and the fixed contact conductive part.
Further, the first permanent magnet and the second permanent magnet are respectively located at one ends of the movable contact conductive part and the fixed contact conductive part.
Specifically, the size and conductivity of the first magnetic conductive plate and the second magnetic conductive plate are the same.
Specifically, the planar structures of the first magnetic conduction plate and the second magnetic conduction plate are fan-shaped structures, rectangular structures or oval structures.
Compared with the prior art, the utility model has at least the following beneficial effects:
the nonpolar magnetic field structure for driving the electric arc to move realizes that the electric arc in any current direction is driven in the same direction through reasonable magnetic field structure design, and has practical significance and theoretical value for improving the performance of a low-voltage switching device.
Further, one ends of the first magnetic conduction plate and the second magnetic conduction plate are respectively extended towards the opening direction of the opening state of the moving contact and the fixed contact and are used for guiding a driving magnetic field for arc movement.
Further, the moving contact and the stationary contact are located at one ends of the moving contact conductive portion and the stationary contact conductive portion, respectively, and the first permanent magnet and the second permanent magnet are located at one ends of the moving contact conductive portion and the stationary contact conductive portion, respectively, as shown in fig. 3 and fig. 4, at this time, the magnetic force lines of the magnetic fields B1 and B2 in the areas where the moving contact and the stationary contact are located are both biased to the inner side and extend to the area far away from the areas where the moving contact and the stationary contact are located. When the movable contact and the stationary contact are separated, an arc is generated therebetween, and as described above, the arc is subjected to lorentz force in a direction away from the movable contact and the stationary contact. On the contrary, if the first permanent magnet and the second permanent magnet are covered on two sides of the movable contact and the fixed contact or are located on two sides of the movable contact and the fixed contact, which are far away from one ends of the movable contact conducting part and the fixed contact conducting part, when the movable contact and the fixed contact are separated to generate an arc, the arc may be subjected to lorentz force in directions away from the movable contact and the fixed contact and towards the movable contact conducting part and the fixed contact conducting part, which is opposite to the design direction.
Further, the nonpolar magnetic field structure scheme can be used in a low-voltage circuit breaker, in the design technology of the existing low-voltage circuit breaker, the moving contact of most schemes can rotate in an arc shape to realize the switching-on and switching-off operation with the fixed contact, the switching-on and switching-off formed area of the moving contact and the fixed contact is in a fan-shaped structure, and the electric arc can expand outwards in an arc shape under the action of self electromagnetic force and air blowing, so that the plane structures of the first magnetic guide plate and the second magnetic guide plate are selected to be in the fan-shaped structure, and the arc generation and movement area can be covered to exert the magnetic field driving arc action of the scheme as much as possible. The elliptical structure avoids the sharp end with smaller curvature radius, reduces the adverse effect of electric field and magnetic field distortion on the electric arc, and simultaneously can meet the extension requirement of the length of the arc movement area, thereby being a preferable scheme.
In summary, the two permanent magnets with opposite polarities are utilized to magnetize the two magnetic conductive plates which are arranged in parallel between the two permanent magnets and are arranged at the two sides of the moving contact, so that the distribution of magnetic force lines which are deviated to the inner space of the two magnetic conductive plates in a larger range and are far away from the moving contact area can be obtained, when the moving contact is separated to generate an electric arc, the electric arc is deviated to one of the magnetic conductive plates under the action of a magnetic field near the magnetic conductive plates, and meanwhile, the electric arc is influenced by Lorentz force in the direction far away from the moving contact and is irrelevant to the direction of electric arc current, so that the purpose of non-polar driving of the electric arc is realized.
The technical scheme of the utility model is further described in detail through the drawings and the embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a front elevational view of the structure of the present utility model;
FIG. 2 is a top view of the structure of the present utility model;
FIG. 3 is a schematic representation of one embodiment of the present utility model;
fig. 4 is a schematic diagram of a second embodiment of the present utility model.
Wherein: 1. a moving contact; 2. a stationary contact; 3. a first permanent magnet; 4. a second permanent magnet; 5. a first magnetic conductive plate; 6. a second magnetic conductive plate; 7. a first magnetic conductive plate cover plate; 8. a second magnetic conductive plate cover plate; 101. a movable contact; 102. a moving contact conductive part; 201. a stationary contact; 202. and a static contact conductive part.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is to be noted that when one component is considered to be "connected" to another component, it may be directly connected to the other component, or several components may exist at the same time. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It should also be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless otherwise specifically defined and limited; either mechanically or electrically, or by communication between two components. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
It should be further noted that, in the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model.
Referring to fig. 1 and 2, the utility model discloses a nonpolar magnetic field structure for driving arc motion, which comprises a moving contact 1, a fixed contact 2, a first permanent magnet 3, a second permanent magnet 4, a first magnetic conduction plate 5, a second magnetic conduction plate 6, a first magnetic conduction plate cover plate 7 and a second magnetic conduction plate cover plate 8.
The first permanent magnet 3 and the second permanent magnet 4 are respectively arranged at two sides of a plane formed by the opening and closing actions of the movable contact 1 and the fixed contact 2, and the polar surface of the first permanent magnet 3 is opposite to the homopolar end surface of the second permanent magnet 4; one end of the first magnetic conduction plate 5 is covered on the first permanent magnet 3 and is positioned between the first permanent magnet 3 and the moving contact 1 and the fixed contact 2; one end of the second magnetic conduction plate 6 is covered on the second permanent magnet 4 and is positioned between the second permanent magnet 4 and the moving contact 1 and the fixed contact 2; through reasonable magnetic field structural design, realize all to the electric arc of arbitrary current direction to same direction drive, have practical meaning and theoretical value to low-voltage switchgear's performance promotion.
The first permanent magnet 3 comprises a first polar surface and a second polar surface and the second permanent magnet 4 comprises a first polar surface and a second polar surface.
The first permanent magnet 3 and the second permanent magnet 4 are respectively arranged at two sides of a plane formed by opening and closing the movable contact 1 and the fixed contact 2, the first polar surface of the first permanent magnet 3 is opposite to the first polar surface of the second permanent magnet 4, and the polarities of the first polar surface of the first permanent magnet 3 and the first polar surface of the second permanent magnet 4 are the same, and are both N poles or both S poles.
The moving contact 1 comprises a moving contact 101 and a moving contact conductive part 102, the fixed contact 2 comprises a fixed contact 201 and a fixed contact conductive part 202, the moving contact 101 and the fixed contact 201 are oppositely arranged, and are respectively positioned at one ends of the moving contact conductive part 102 and the fixed contact conductive part 202.
One end of the first permanent magnet 3 and the second permanent magnet 4, which is far away from the opening direction of the movable contact 101 and the fixed contact 102, namely one end of the movable contact conductive part 102 and the fixed contact conductive part 202;
one end of a first magnetic conduction plate 5 is covered on a first polar surface of the first permanent magnet 3 and is positioned between the first permanent magnet 3 and the moving contact 1 and the fixed contact 2;
the first magnetic conduction plate cover plate 7 covers the surface of the first magnetic conduction plate 5 and is positioned between the first magnetic conduction plate 5 and the moving contact 1 and the fixed contact 2;
one end of the second magnetic conduction plate 6 is covered on the first polar surface of the second permanent magnet 4 and is positioned between the second permanent magnet 4 and the moving contact 1 and the fixed contact 2;
the second magnetic conduction plate cover plate 8 covers the surface of the second magnetic conduction plate 6 and is positioned between the second magnetic conduction plate 6 and the moving contact 1 and the fixed contact 2;
the other ends of the first magnetic conduction plate 5 and the second magnetic conduction plate 6 are applied to the opening Fang Xiangyan of the moving contact 1 and the fixed contact 2 in the opening state, and are used for guiding a driving magnetic field for arc movement.
As a preferable mode, the first magnetic conductive plate 5 and the second magnetic conductive plate 6 are made of the same material and have the same size, and the material is selected from materials with high magnetic permeability.
As a preferable scheme, the planar structures of the first magnetic conductive plate 5 and the second magnetic conductive plate 6 are a fan-shaped structure, a rectangular structure or an oval structure.
As a preferable scheme, the first magnetic conduction plate cover plate 7 and the second magnetic conduction plate cover plate 8 are made of high-temperature resistant and insulating materials, and are gas-producing or non-gas-producing materials.
Referring to fig. 3, the working principle of the nonpolar magnetic field structure for driving arc motion of the present utility model is as follows:
the polarity of the first polar surface of the first permanent magnet 3 close to the first magnetic conduction plate 5 is N, and the polarity of the first polar surface of the second permanent magnet 4 close to the second magnetic conduction plate 6 is also N. The first magnetic conduction plate 5 is magnetized under the action of the first polar surface of the first permanent magnet 3, and after magnetization, one side of the first magnetic conduction plate 5 far away from the first polar surface of the first permanent magnet 3 is an N pole; similarly, the second magnetic conduction plate 6 is magnetized under the action of the first polar surface of the second permanent magnet 4, and the side of the magnetized second magnetic conduction plate 6 far away from the first polar surface of the second permanent magnet 4 is also N pole; accordingly, the distribution of magnetic lines of force in the region between the first magnetically permeable plate 5 and the second magnetically permeable plate 6 is shown in fig. 3. As shown in fig. 3, when the moving contact 1 and the fixed contact 2 are separated, an arc is generated, and if the arc current flows into the paper surface, at this time, if the arc is biased to the first magnetic conductive plate 5 side, the arc receives a component F1 of the lorentz force biased to the second magnetic conductive plate 6 direction under the action of the magnetic field B1, and if the arc is biased to the second magnetic conductive plate 6 side, the arc further biases to the second magnetic conductive plate 6 under the action of the magnetic field B2, and receives a component F2 in a direction away from the moving contact 1 and the fixed contact 2. As shown in fig. 4, if the arc current is flowing out of the paper, if the arc is biased to the first magnetic conductive plate 5 side, the arc will be biased to the first magnetic conductive plate 5 direction lorentz force component F1 under the action of the magnetic field B1, further biased to the first magnetic conductive plate 5, and also will be biased to the direction component F2 away from the moving contact 1 and the fixed contact 2 according to the left hand rule; if the arc is biased toward the second magnetic conductive plate 6, the arc receives a component F1 of the lorentz force biased toward the first magnetic conductive plate 5 by the magnetic field B2, and moves toward the first magnetic conductive plate 5. Therefore, no matter whether the arc current flows into or out of the paper surface, the arc can deviate to the first magnetic conduction plate 5 or the second magnetic conduction plate 6, and the magnetic field B1 near the first magnetic conduction plate 5 or the magnetic field B2 near the second magnetic conduction plate 6 moves in the direction away from the moving contact 1 and the fixed contact 2 under the action of the magnetic field near the side magnetic conduction plate, so that the purpose of non-polar magnetic drive arc is achieved.
Referring to fig. 4, in another embodiment, the polarity of the first polar surface of the first permanent magnet 3 close to the first magnetic conductive plate 5 is S, and the polarity of the first polar surface of the second permanent magnet 4 close to the second magnetic conductive plate 6 is also S. The stress and movement of the arc under the magnetic field formed between the first magnetic conductive plate 5 and the second magnetic conductive plate 6 are similar to those of the above embodiment, and will not be described herein. In summary, under the structural scheme of the application, no matter the polarity of the first polar surface of the first permanent magnet 3 and the first polar surface of the second permanent magnet 4 is N or S, according to the scheme of the application, lorentz force far away from the moving contact 1 and the fixed contact 2 can be generated for electric arc.
In summary, according to the nonpolar magnetic field structure for driving the electric arc to move, through reasonable magnetic field structure design, the electric arc in any current direction is driven to the same direction, and the nonpolar magnetic field structure has practical significance and theoretical value for improving the performance of a low-voltage switching device.
The above is only for illustrating the technical idea of the present utility model, and the protection scope of the present utility model is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present utility model falls within the protection scope of the claims of the present utility model.
Claims (10)
1. The nonpolar magnetic field structure for driving arc movement is characterized by comprising a first permanent magnet (3) and a second permanent magnet (4), wherein the first permanent magnet (3) and the second permanent magnet (4) are respectively arranged on two sides of a plane formed by opening and closing actions of a moving contact (1) and a fixed contact (2), and the polar surface of the first permanent magnet (3) is opposite to the homopolar end surface of the second permanent magnet (4).
2. The nonpolar magnetic field structure for driving arc motion according to claim 1, wherein the first permanent magnet (3) is disposed on the first magnetically permeable plate (5), and the second permanent magnet (4) is disposed on the second magnetically permeable plate (6).
3. The nonpolar magnetic field structure for driving arc motion according to claim 2, wherein one ends of the first magnetic conductive plate (5) and the second magnetic conductive plate (6) are respectively extended toward opening directions of the moving contact (1) and the stationary contact (2) in a separated state.
4. The nonpolar magnetic field structure for driving arc motion according to claim 2, wherein a first magnetic conductive plate cover plate (7) is arranged on one side of the first magnetic conductive plate (5) far away from the first permanent magnet (3), and a second magnetic conductive plate cover plate (8) is arranged on one side of the second magnetic conductive plate (6) far away from the second permanent magnet (4).
5. The nonpolar magnetic field structure for driving arc motion according to claim 4, wherein one end of a first magnetic conduction plate (5) is covered on a first polar surface of the first permanent magnet (3), the first magnetic conduction plate (5) is positioned between the first permanent magnet (3) and the moving contact (1) and the fixed contact (2), one end of a second magnetic conduction plate (6) is covered on a first polar surface of a second permanent magnet (4), and the second magnetic conduction plate (6) is positioned between the second permanent magnet (4) and the moving contact (1) and the fixed contact (2).
6. The non-polar magnetic field structure for driving arc motion according to claim 1, wherein the first polar surface of the first permanent magnet (3) and the first polar surface of the second permanent magnet (4) have the same polarity.
7. The nonpolar magnetic field structure for driving arc motion according to claim 1, wherein the moving contact (1) comprises a moving contact (101) and a moving contact conductive part (102), the stationary contact (2) comprises a stationary contact (201) and a stationary contact conductive part (202), and the moving contact (101) and the stationary contact (201) are oppositely arranged and are respectively positioned at one ends of the moving contact conductive part (102) and the stationary contact conductive part (202).
8. The nonpolar magnetic field structure for driving arc motion according to claim 7, wherein the first permanent magnet (3) and the second permanent magnet (4) are respectively positioned at one ends of the moving contact conductive portion (102) and the fixed contact conductive portion (202).
9. The non-polar magnetic field structure for driving arc motion according to claim 1, characterized in that the first magnetically permeable plate (5) and the second magnetically permeable plate (6) are the same size and conductivity.
10. The nonpolar magnetic field structure for driving arc motion according to claim 1, wherein the planar structures of the first magnetic conductive plate (5) and the second magnetic conductive plate (6) are a sector structure, a rectangular structure, or an oval structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223448433.2U CN219303521U (en) | 2022-12-22 | 2022-12-22 | Nonpolar magnetic field structure for driving electric arc to move |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223448433.2U CN219303521U (en) | 2022-12-22 | 2022-12-22 | Nonpolar magnetic field structure for driving electric arc to move |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219303521U true CN219303521U (en) | 2023-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223448433.2U Active CN219303521U (en) | 2022-12-22 | 2022-12-22 | Nonpolar magnetic field structure for driving electric arc to move |
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| Country | Link |
|---|---|
| CN (1) | CN219303521U (en) |
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- 2022-12-22 CN CN202223448433.2U patent/CN219303521U/en active Active
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