CN218730520U - Arc breaking device - Google Patents

Abstract

The application discloses an arc breaking device, wherein the arc breaking device utilizes a magnet arc extinguishing scheme to extinguish arc, and adjusts a magnetic field formed by a magnet by adjusting the arrangement mode of the magnet, so that the magnetic field formed by the magnet forms a multi-bending arc extinguishing field, and the multi-bending arc extinguishing field can bend the arc in different modes to elongate the arc, accelerate the breaking and extinguishing of the arc, and in such a way, enhance the arc extinguishing capacity of the arc breaking device.

Description

Arc breaking device

Technical Field

The application relates to the field of arc extinguishing equipment, in particular to arc breaking equipment.

Background

In recent years, dc transmission systems have become more and more popular and are developed for high voltage and high current. The improvement of the voltage of the direct current transmission system brings cost reduction, line active loss reduction, generation efficiency improvement and other advantages to direct current transmission, and meanwhile, some hidden dangers are increased to a certain extent, wherein direct current arc faults are typical potential safety hazards in direct current transmission.

For example, in a photovoltaic system in which a dc switch for controlling between a photovoltaic panel and an inverter is provided with a stationary contact part and a movable contact part movable relative to the stationary contact part, when a voltage and/or a current in a dc circuit is greater than a preset range, an arc is formed between the movable contact part and the stationary contact part at the moment when the dc circuit to be conducted is cut off by the dc switch. The greater the voltage or current in the dc circuit, the more arcs are generated during the breaking of the dc circuit by the dc switch, which if sustained burns can damage surrounding equipment and even cause an explosion.

There are many arc-extinguishing schemes, such as increasing the diameter of the moving contact part to increase the distance to lengthen the arc, increasing the breaking speed, and adding magnets to extinguish the arc. However, these arc extinguishing schemes have some drawbacks, for example, increasing the diameter of the moving contact portion leads to increase of the overall size of the dc switch, which is contrary to the trend of miniaturization of the current switch, and there is a significant speed limit for increasing the breaking speed, and the increase of the breaking speed leads to decrease of the control stability and the service life of the dc switch, while the arc extinguishing effect of the additional magnet is not significant, and often cannot meet the application requirements.

Therefore, a new arc extinguishing solution is desired.

Disclosure of Invention

An advantage of the present application is to provide an arc breaking apparatus, wherein the arc breaking apparatus utilizes a magnet arc extinguishing scheme to extinguish arc, and adjusts a magnetic field formed by a magnetic field generating element by adjusting a disposition of the magnetic field generating element, so that the magnetic field formed by the magnetic field generating element forms a multi-bending arc extinguishing field capable of variously bending an arc to elongate the arc, accelerate the arc to be broken and extinguished, and in this way, enhance an arc extinguishing capability of the arc breaking apparatus.

Another advantage of the present application is to provide an arc breaking device in which the arc is lengthened by adjusting the disposition of the magnets so that the arc breaking device can enhance its arc extinguishing capability without substantially increasing its overall size or increasing its overall size.

According to one aspect of the present application, there is provided an arc breaking device comprising: an electrical contact zone comprising at least one static contact and at least one dynamic contact, the dynamic contact being movable relative to the static contact to be adapted to control the arc breaking device to switch between an on-state and an off-state, wherein the dynamic contact is in contact with the static contact when the arc breaking device is switched to the on-state and is separated from the static contact when the arc breaking device is switched to the off-state; and

the arc extinguishing structure comprises at least two magnetic field generating elements arranged on a motion path of the dynamic contact part, the at least two magnetic field generating elements comprise a first magnetic field generating element forming a first magnetic field and a second magnetic field generating element forming a second magnetic field, and the magnetic field direction of the first magnetic field is different from that of the second magnetic field.

In the arc breaking device according to the present application, the first magnetic field generating element is a first magnetic element and the second magnetic field generating element is a second magnetic element.

In the arc breaking device according to the present application, the first magnetic field generating element is a first coil, and the second magnetic field generating element is a second coil.

In the arc breaking device according to the present application, a magnetic pole direction of the first magnetic element and a magnetic pole direction of the second magnetic element are different.

In the arc breaking apparatus according to the present application, the magnetic pole direction of the first magnetic element is a direction in which the strongest N-pole point of the first magnetic element points to the strongest S-pole point, and the magnetic pole direction of the second magnetic element is a direction in which the strongest N-pole point of the second magnetic element points to the strongest S-pole point.

In the arc breaking device according to the present application, an angle between a magnetic pole direction of the first magnetic element and a magnetic pole direction of the second magnetic element is greater than 0 ° and equal to or less than 90 °, or greater than 90 ° and less than 180 °.

In the arc breaking device according to the present application, an angle between a magnetic pole direction of the first magnetic element and a magnetic pole direction of the second magnetic element is 180 °.

In the arc breaking device according to the present application, the first magnetic element and the second magnetic element are parallel to each other, and a magnetic pole of the first magnetic element is oriented opposite to a magnetic pole of the second magnetic element, the first magnetic element has a first central axis, the second magnetic element has a second central axis, and the first central axis of the first magnetic element is parallel to the second central axis of the second magnetic element.

In the arc breaking device according to the application, the arc extinguishing structure further comprises a third magnetic field generating element adjacent to the second magnetic field generating element, a magnetic field direction of a third magnetic field formed by the third magnetic field generating element being different from a magnetic field direction of the second magnetic field.

In the arc breaking device according to the present application, the arc extinguishing structure further includes a third magnetic field generating element adjacent to the second magnetic field generating element, a magnetic field direction of a third magnetic field formed by the third magnetic field generating element being different from a magnetic field direction of the second magnetic field, the third magnetic field generating element being a third magnetic element.

In the arc breaking device according to the application, the magnetic field direction of the third magnetic field is the same as the magnetic field direction of the first magnetic field.

In the arc breaking device according to the present application, a magnetic field direction of the third magnetic field is the same as a magnetic field direction of the first magnetic field, the first magnetic element, the second magnetic element, and the third magnetic element are parallel to each other, and a magnetic pole orientation of the first magnetic element is opposite to a magnetic pole orientation of the second magnetic element, a magnetic pole orientation of the third magnetic element is opposite to a magnetic pole orientation of the second magnetic element, and a magnetic pole orientation of the first magnetic element is the same as a magnetic pole orientation of the third magnetic element.

In the arc-breaking device according to the application, the first magnetic field generating element and the second magnetic field generating element correspond to the movement path of the dynamic contact in the axial direction set by the arc-breaking device.

Further objects and advantages of the present application will become apparent from a reading of the ensuing description and drawings.

These and other objects, features and advantages of the present application will become more fully apparent from the following detailed description, the accompanying drawings and the claims.

Drawings

The above and other objects, features and advantages of the present application will become more apparent by describing in more detail embodiments of the present application with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings, like reference numbers generally represent like parts or steps.

Fig. 1 illustrates a block diagram schematic of an arc interrupting device in accordance with an embodiment of the present application.

Fig. 2 illustrates a perspective view of the arc chute apparatus according to an embodiment of the present application.

Fig. 3 illustrates a partial perspective view of a specific example of the arc breaking device according to an embodiment of the present application.

Fig. 4 illustrates a partial explosion schematic of one particular example of the arc chute apparatus in accordance with an embodiment of the present application.

Fig. 5 illustrates a partial explosion schematic of another specific example of the arc breaking device according to an embodiment of the present application.

Figure 6 illustrates a schematic view of an arc chute distribution of the arc breaking device according to an embodiment of the present application.

Fig. 7 illustrates one deployment of the magnetic field generating element of the arc breaking device according to an embodiment of the present application.

Fig. 8 illustrates another arrangement of the magnetic field generating elements of the arc breaking device according to an embodiment of the present application.

Fig. 9 illustrates yet another arrangement of the magnetic field generating elements of the arc breaking device according to an embodiment of the present application.

Fig. 10A illustrates a lorentz force trend of the magnetic field generating element in one particular example of the arc breaking device according to an embodiment of the present application.

Fig. 10B illustrates a movement trace of an arc in one particular example of the arc breaking device according to an embodiment of the present application.

Fig. 11A illustrates a lorentz force trend of a magnetic field generating element in another specific example of the arc breaking device according to an embodiment of the present application.

Fig. 11B illustrates a movement trace of an arc in another specific example of the arc breaking device according to an embodiment of the present application.

Fig. 12A illustrates a lorentz magnetic force trend of the magnetic field generating element in yet another specific example of the arc breaking device according to an embodiment of the present application.

Fig. 12B illustrates a movement trace of an arc in yet another specific example of the arc breaking device according to an embodiment of the present application.

Fig. 13A illustrates a lorentz force trend of a magnetic field generating element in yet another specific example of the arc breaking device according to an embodiment of the present application.

Fig. 13B illustrates a movement trace of an arc in yet another specific example of the arc breaking device according to an embodiment of the present application.

Fig. 14A illustrates a lorentz magnetic force trend of the magnetic field generating element in yet another specific example of the arc breaking device according to an embodiment of the present application.

Fig. 14B illustrates a movement trace of an arc in yet another specific example of the arc breaking device according to an embodiment of the present application.

Fig. 15A illustrates a lorentz force trend of a magnetic field generating element in yet another specific example of the arc breaking device according to an embodiment of the present application.

Fig. 15B illustrates a movement trace of an arc in yet another specific example of the arc breaking device according to an embodiment of the present application.

Detailed Description

Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein.

Summary of the application

As described above, there are many arc-extinguishing solutions, such as increasing the diameter of the moving contact portion to increase the distance between the moving contact portion and the moving contact portion to lengthen the arc, increasing the breaking speed, and adding a magnet to extinguish the arc. However, these arc extinguishing solutions have some drawbacks, for example, increasing the diameter of the moving contact part leads to an increase in the overall size of the dc switch, which is contrary to the current trend of miniaturization of the switches, and there is a significant speed limit for increasing the breaking speed, and the increase in the breaking speed leads to a decrease in the control stability and the lifetime of the dc switch, while the arc extinguishing effect of the additional magnet is not significant and often fails to meet the application requirements.

Therefore, a new arc extinguishing solution is desired.

Specifically, through the research on the scheme of the inventor of the application for extinguishing the arc of the magnet, the following results are found: in the solution of deflecting the arc by the magnet to elongate the arc and thus break the arc, usually, the arc is deflected by the magnet in a specific direction so that the arc is elongated along the specific direction, and in order to draw the arc long and thin enough to break it, the size of the housing of the dc switch in the specific direction is correspondingly increased, which does not meet the trend of miniaturization of the dc switch at present.

Based on this, the present inventors have proposed an arc breaking device and attempted to improve the space utilization and arc extinguishing performance of the arc breaking device by using the principle that a curve in space is longer than a straight path. In particular, a particular magnetic field may exert a force on the arc in a particular direction, causing the arc to deflect in a particular manner. The magnetic field generating element (such as a magnet or a coil) can be arranged in an area where the electric arc is generated, and the magnetic field formed by the magnetic field generating element is adjusted by adjusting the arrangement mode of the magnetic field generating element, so that the magnetic field formed by the magnetic field generating element deflects the electric arc in different modes for many times, the electric arc is guided to be bent for many times to elongate the electric arc, and the breaking and extinguishing of the electric arc are accelerated.

Accordingly, the present application provides an arc breaking device comprising an electrical contact zone and an arc extinguishing structure, wherein the electrical contact zone comprises at least one static contact portion and at least one dynamic contact portion, the dynamic contact portion being movable relative to the static contact portion so as to be adapted to control switching of the arc breaking device between an on-state and an off-state, wherein the dynamic contact portion is in contact with the static contact portion when the arc breaking device is switched to the on-state and the dynamic contact portion is separated from the static contact portion when the arc breaking device is switched to the off-state; the arc extinguishing structure comprises at least two magnetic field generating elements arranged on a motion path of the dynamic contact part, the at least two magnetic field generating elements comprise a first magnetic field generating element forming a first magnetic field and a second magnetic field generating element forming a second magnetic field, and the magnetic field direction of the first magnetic field is different from that of the second magnetic field.

Having described the general principles of the present application, various non-limiting embodiments of the present application will now be described with reference to the accompanying drawings.

Exemplary arc breaking apparatus

The arc interruption device according to embodiments of the present application is illustrated, which provides a novel arc extinguishing solution that can be widely applied in a variety of scenarios, for example, in a dc power interruption process of a photovoltaic system.

Specifically, in the present embodiment, as shown in fig. 1, the arc breaking device includes an electrical contact area 10 and an arc extinguishing structure 20. The electrical contact area 10 comprises at least one static contact 11 and at least one dynamic contact 12. The dynamic contact 12 is movable relative to the static contact 11 for controlling the arc breaking device to switch between an on-state and an off-state, wherein the dynamic contact 12 is in contact with the static contact 11 when the arc breaking device is switched to the on-state and the dynamic contact 12 is separated from the static contact 11 when the arc breaking device is switched to the off-state.

In the present embodiment, the arc breaking device further comprises an actuation control assembly 200 for controlling the switching of the state of the arc breaking device. The specific implementation of the actuation control assembly 200 is not limiting of the present application. For example, in a specific example of the present application, the actuation control assembly 200 includes an operating member and a transmission member connected between the operating member and the dynamic contact portion 12, and a user can operate the operating member to move the transmission member, so as to move the dynamic contact portion 12 relative to the static contact portion 11, so that the dynamic contact portion 12 is in contact with or separated from the static contact portion 11, thereby controlling the state switching of the arc breaking device. In a specific example of the present application, the actuation control assembly 200 includes a signal processing unit and a command execution unit, and the signal processing unit of the actuation control assembly 200 can receive a specific signal and implement the state switching of the arc breaking device in cooperation with the command execution unit. The switching of the state of the arc-breaking device can be remotely controlled by the user by means of a signal transmission device sending a specific signal to the signal processor unit of the actuation control assembly 200.

The electrical contact area 10 may generate an arc during switching of the arc breaking device between an on-state and an off-state. Accordingly, in the present exemplary embodiment, an arc quenching structure 20 is assigned to the electrical contact region 10 in order to quench an arc.

Specifically, in the embodiments of the present application, the arc is extinguished using a magnet arc extinguishing scheme, and an attempt is made to improve the space utilization and arc extinguishing performance of the arc breaking device using the principle that a curve is longer than a straight path. More specifically, the magnetic field formed by the magnetic field generating element is adjusted by adjusting the arrangement mode of the magnetic field generating element, so that the magnetic field formed by the magnetic field generating element forms a multi-bending arc extinguishing field area, and the multi-bending arc extinguishing field area can bend an arc in different modes to elongate the arc, and accelerate the breaking and extinguishing of the arc.

It is worth mentioning that during switching of the arc-breaking device between the on-state and the off-state, an arc is generated between the dynamic contact 12 and the static contact 11, the arc having a trajectory that almost coincides with the trajectory of the dynamic contact 12 without interference of external factors such as magnetic fields. Therefore, in the embodiment of the present application, the movement locus of the dynamic contact portion 12 is used as a positional reference to describe the arrangement manner of other elements.

Accordingly, in the embodiment of the present application, the arc extinguishing structure 20 includes at least two magnetic field generating elements disposed in the moving path of the dynamic contact portion 12, and the at least two magnetic field generating elements include a first magnetic field generating element 21 forming a first magnetic field and a second magnetic field generating element 22 forming a second magnetic field, and there is a difference between the first magnetic field and the second magnetic field, so that the first magnetic field and the second magnetic field form a multi-bending arc extinguishing field and deflect the arc in different modes, and further the arc is bent multiple times with the change of the deflected mode.

In one embodiment of the present application, the first magnetic field generating element 21 and the second magnetic field generating element 22 are disposed on the movement path of the dynamic contact part 12 in such a manner that the first magnetic field generating element 21 and the second magnetic field generating element 22 correspond to the movement path of the dynamic contact part 12 in the axial direction set by the arc breaker apparatus. Here, the axial direction set by the arc breaking device is an extending direction of a longitudinal central axis L of the arc breaking device.

In the embodiments of the present application, the main function of the magnetic field generating element is to generate a specific magnetic field, and the specific structure thereof is not limited in the present application. The magnetic field generating element may be implemented as a magnetic element such as a permanent magnet or a soft magnet, or may be implemented as a coil that generates a magnetic field when energized.

Accordingly, in some embodiments of the present application, the first magnetic field generating element 21 is the first magnetic element 211 and the second magnetic field generating element 22 is the second magnetic element 221, as shown in fig. 4. In other embodiments of the present application, the first magnetic field generating element 21 is a first coil 212, and the second magnetic field generating element 22 is a second coil 222, as shown in fig. 5.

The shape of the magnetic field generating element is also not limiting to the present application, and may be, for example, circular, rectangular, fan-shaped, etc. The shape of the first magnetic field generation element 21 and the shape of the second magnetic field generation element 22 may be the same or different.

In the embodiment of the present application, the magnetic field intensity of the first magnetic field generating element 21 and the magnetic field intensity of the second magnetic field generating element 22 may be controlled to make the magnetic field formed by the first magnetic field generating element 21 different from the magnetic field formed by the second magnetic field generating element 22, so that the arc is bent to different degrees under the action of the first magnetic field and the second magnetic field, and is pulled apart in such a manner by elongation. The magnetic field direction of the magnetic field formed by the first magnetic field generating element 21 and the magnetic field direction of the magnetic field formed by the second magnetic field generating element 22 may be controlled to make the magnetic field generated by the first magnetic field generating element 21 different from the magnetic field generated by the second magnetic field generating element 22, so that the arc may be bent in different directions under the action of the first magnetic field and the second magnetic field, and thus be pulled out.

Accordingly, in some embodiments of the present application, the magnetic field strength of the first magnetic field formed by the first magnetic field generating element 21 is different from the magnetic field strength of the second magnetic field formed by the second magnetic field generating element 22. The specific manner of achieving the difference in the magnetic field strength of the first magnetic field and the second magnetic field is not limited in this application, and for example, the type of the first magnetic field generating element 21 and the second magnetic field generating element 22 may be controlled to be different, or the size of the first magnetic field generating element 21 and the second magnetic field generating element 22 may be controlled to be different, or the shape of the first magnetic field generating element 21 and the second magnetic field generating element 22 may be controlled to be different.

Accordingly, in one specific example of the present application, the first magnetic field generating element 21 is a permanent magnet and the second magnetic field generating element 22 is a soft magnet or a coil, so that the magnetic field strength of the first magnetic field and the second magnetic field are different. In another specific example of the present application, the first magnetic field generating element 21 and the second magnetic field generating element 22 are both permanent magnets and made of the same material, and the volume of the first magnetic field generating element 21 is different from the volume of the second magnetic field generating element 22, so that the magnetic field strength of the first magnetic field and the second magnetic field is different.

In other embodiments of the present application, the first magnetic field generating element 21 generates a first magnetic field having a magnetic field direction different from that of the second magnetic field generating element 22. When the magnetic field generating elements are magnetic elements and the magnetic pole directions of the magnetic elements are different, the magnetic field directions of the magnetic fields formed by the magnetic elements are different. Accordingly, in some embodiments of the present application, the magnetic field direction of the magnetic field generated by each magnetic element may be adjusted by adjusting the magnetic pole direction of each magnetic element. It should be understood that in other embodiments, the magnetic field direction of the magnetic field generated by each magnetic element may be adjusted in other ways.

Specifically, in an embodiment that the magnetic field direction of the magnetic field generated by each magnetic element is adjusted by adjusting the magnetic pole direction of each magnetic element, the direction in which the strongest N magnetic pole point of the magnetic element points to the strongest S magnetic pole point is defined as the magnetic pole direction of the magnetic element, wherein the strongest N magnetic pole point is the point with the strongest magnetism in the N poles of the magnetic element, and the strongest S magnetic pole point is the point with the strongest magnetism in the S poles of the magnetic element. Accordingly, in the embodiment of the present application, the magnetic pole direction of the first magnetic element 211 is a direction in which the strongest N-pole point of the first magnetic element 211 points to the strongest S-pole point, and the magnetic pole direction of the second magnetic element 221 is a direction in which the strongest N-pole point of the second magnetic element 221 points to the strongest S-pole point. The specific way of implementing the difference between the magnetic pole direction of the first magnetic element 211 and the magnetic pole direction of the second magnetic element 221 is not limited in the present application.

In a specific example of the present application, an included angle α 1 between a magnetic pole direction of the first magnetic element 211 and a magnetic pole direction of the second magnetic element 221 is greater than 0 ° and equal to or less than 90 °, as shown in fig. 7, and the first magnetic element 211 and the second magnetic element 221 may be implemented by various arrangements. For example, the first magnetic element 211 has a first central axis L1, the second magnetic element 221 has a second central axis L2, the strongest N magnetic pole of the first magnetic element 211 and the strongest N magnetic pole of the second magnetic element 221 both face the dynamic contact portion 12, the strongest S magnetic pole of the first magnetic element 211 and the strongest S magnetic pole of the second magnetic element 221 both face away from the dynamic contact portion 12 in the axial direction set by the electrical contact region 10, an included angle exists between the first magnetic element 211 and the second magnetic element 221, and the included angle between the first central axis L1 line and the second central axis L2 line is greater than 0 ° and less than or equal to 90 °; for another example, the strongest S magnetic pole of the first magnetic element 211 and the strongest S magnetic pole of the second magnetic element 221 both face the dynamic contact portion 12, the strongest N magnetic pole of the first magnetic element 211 and the strongest N magnetic pole of the second magnetic element 221 both are far away from the dynamic contact portion 12 in the axial direction set by the electrical contact region 10, and an included angle between the first central axis L1 line and the second central axis L2 line is greater than 0 ° and less than or equal to 90 °; for another example, the magnetic pole direction of the first magnetic element 211 is perpendicular to the axial direction set by the electrical contact region 10, the strongest S magnetic pole point or the strongest N magnetic pole of the second magnetic element 221 faces the dynamic contact portion 12, and the included angle between the first central axis L1 line and the second central axis L2 line is greater than 0 ° and less than or equal to 90 °; for another example, the magnetic pole direction of the second magnetic element 221 is perpendicular to the axial direction set by the electrical contact region 10, the strongest S-pole point or the strongest N-pole point of the first magnetic element 211 faces the dynamic contact portion 12, and the included angle between the first central axis L1 and the second central axis L2 is greater than 0 ° and less than or equal to 90 °.

In another specific example of the present application, an angle α 1 between a magnetic pole direction of the first magnetic element 211 and a magnetic pole direction of the second magnetic element 221 is greater than 90 ° and less than 180 °, as shown in fig. 8. The disposition of the first magnetic element 211 and the second magnetic element 221 may take various forms. For example, the strongest N-pole point of the first magnetic element 211 faces the dynamic contact portion 12, the strongest S-pole point of the first magnetic element 211 is away from the dynamic contact portion 12 in the axial direction set by the electrical contact region 10, the strongest S-pole point of the second magnetic element 221 faces the dynamic contact portion 12, the strongest N-pole point of the second magnetic element 221 is away from the dynamic contact portion 12 in the axial direction set by the electrical contact region 10, and an included angle between the first central axis L1 line and the second central axis L2 line is greater than 90 ° and less than 180 °; for another example, the strongest S-pole point of the first magnetic element 211 faces the dynamic contact portion 12, the strongest N-pole point of the first magnetic element 211 is far away from the dynamic contact portion 12 in the axial direction set by the electrical contact region 10, the strongest N-pole point of the second magnetic element 221 faces the dynamic contact portion 12, the strongest S-pole point of the second magnetic element 221 is far away from the dynamic contact portion 12 in the axial direction set by the electrical contact region 10, and an included angle between the first central axis L1 line and the second central axis L2 line is greater than 90 ° and less than 180 °; for another example, the magnetic pole direction of the first magnetic element 211 is perpendicular to the axial direction set by the electrical contact region 10, the strongest S magnetic pole point or the strongest N magnetic pole of the second magnetic element 221 faces the dynamic contact portion 12, and the included angle between the first central axis L1 line and the second central axis L2 line is greater than 90 ° and less than 180 °; for another example, the magnetic pole direction of the second magnetic element 221 is perpendicular to the axial direction set by the electrical contact region 10, the strongest S magnetic pole point or the strongest N magnetic pole point of the first magnetic element 211 faces the dynamic contact portion 12, and the included angle between the first central axis L1 and the second central axis L2 is greater than 90 ° and less than 180 °.

In yet another specific example of the present application, an angle between a magnetic pole direction of the first magnetic element 211 and a magnetic pole direction of the second magnetic element 221 is 180 °, as shown in fig. 9. The first magnetic element 211 and the second magnetic element 221 may be disposed in a manner of: the first magnetic element 211 and the second magnetic element 221 are parallel to each other, and the magnetic pole of the first magnetic element 211 is oriented opposite to the magnetic pole of the second magnetic element 221, and the first central axis L1 of the first magnetic element 211 is parallel to the second central axis L2 of the second magnetic element 221.

It should be noted that in the above three specific examples, the extending direction of the first central axis L1 coincides with the magnetic pole direction of the first magnetic element 211, and the extending direction of the second central axis L2 coincides with the magnetic pole direction of the second magnetic element 221. It should be understood that the extending direction of the first central axis L1 may not coincide with the magnetic field direction of the first magnetic field, and the extending direction of the second central axis L2 may also not coincide with the magnetic field direction of the second magnetic field. Accordingly, the disposition of the first magnetic element 211 and the second magnetic element 221 may also be in other forms, that is, the first magnetic element 211 and the second magnetic element 221 may control an angle between a magnetic pole direction of the first magnetic element 211 and a magnetic pole direction of the second magnetic element 221 through other disposition, and further control an angle between a magnetic field direction of the first magnetic field and a magnetic field direction of the second magnetic field, so that the first magnetic field direction and the second magnetic field direction are different.

In some embodiments of the present application, the arc extinguishing structure 20 further includes a third magnetic field generating element 23, and the third magnetic field generating element 23 forms a third magnetic field having a magnetic field direction different from the magnetic field direction of the first magnetic field and/or different from the magnetic field direction of the second magnetic field. The magnetic fields formed by the first magnetic field generating element 21, the second magnetic field generating element 22, and the third magnetic field generating element 23 can be adjusted by adjusting the poses (i.e., positions and orientations) of the first magnetic field generating element 21, the second magnetic field generating element 22, and the third magnetic field generating element 23, thereby adjusting the bent quenching field region formed by the first magnetic field, the second magnetic field, and the third magnetic field.

In some embodiments of the present application, the third magnetic field generating element 23 is adjacent to the second magnetic field generating element 22, the first magnetic field generating element 21 generates a first magnetic field having a magnetic field direction different from that of the second magnetic field generating element 22, the third magnetic field generating element 23 generates a third magnetic field having a magnetic field direction identical to that of the first magnetic field generated by the first magnetic field generating element 21, and the third magnetic field generating element 23 generates a third magnetic field having a magnetic field direction different from that of the second magnetic field generated by the second magnetic field generating element 22.

As described above, when the magnetic field generating elements are magnetic elements and the magnetic pole directions of the magnetic elements are different, the magnetic field directions of the magnetic fields generated by the magnetic elements are different. Accordingly, in some embodiments of the present application, the magnetic field direction of the magnetic field generated by each magnetic element may be adjusted by adjusting the magnetic pole direction of each magnetic element. In the embodiment of the present application, the magnetic pole direction of the third magnetic element 231 is a direction in which the strongest N magnetic pole point of the third magnetic element 231 points to the strongest S magnetic pole point. The poses of the third magnetic element 231 and the second magnetic element 221 may be adjusted such that the magnetic pole direction of the third magnetic element 231 is different from the magnetic pole direction of the second magnetic element 221, and thus the magnetic field direction of the third magnetic field formed by the third magnetic element 231 is different from the magnetic field direction of the second magnetic field formed by the second magnetic element 221.

Specifically, an angle α 2 between the magnetic pole direction of the third magnetic element 231 and the magnetic pole direction of the second magnetic element 221 is greater than 0 ° and equal to or less than 90 °, or greater than 90 ° and less than 180 °, or equal to or more than 180 °. The concrete expression is as follows: the third magnetic element 231 has a third central axis L3, an included angle between the third central axis L3 and the second central axis L2 is greater than 0 ° and less than or equal to 90 °, or greater than 90 ° and less than 180 °, or equal to 180 °, wherein an extending direction of the third central axis L3 is consistent with a magnetic pole direction of the third magnetic element 231.

In a specific example of the present application, the first magnetic element 211, the second magnetic element 221, and the third magnetic element 231 are parallel to each other, and a magnetic pole orientation of the first magnetic element 211 is opposite to a magnetic pole orientation of the second magnetic element 221, the magnetic pole orientation of the first magnetic element 211 is the same as a magnetic pole orientation of the third magnetic element 231, and the magnetic pole orientation of the third magnetic element 231 is opposite to a magnetic pole orientation of the second magnetic element 221.

In this particular example, the strongest N-pole point of the first magnetic element 211 is toward the dynamic contact 12, the strongest S-pole point of the second magnetic element 221 is toward the dynamic contact 12, and the strongest N-pole point of the third magnetic element 231 is toward the dynamic contact 12. Fig. 10A and 11A illustrate the tendency of the first magnetic element 211, the second magnetic element 221, and the third magnetic element 231 to lorentz force of the arc, and fig. 10B and 11B illustrate the movement trajectory of the arc under the action of the first magnetic element 211, the second magnetic element 221, and the third magnetic element 231. The first magnetic field formed by the first magnetic element 211 causes the arc to bend in a first trend, the second magnetic field formed by the second magnetic element 221 causes the arc to bend in a second trend, and the third magnetic field formed by the third magnetic element 231 causes the arc to bend in a third trend, wherein the third trend is opposite to the second trend, and the third trend is the same as the first trend. For example, the electrical contact area 10 includes a middle portion and an outer peripheral portion surrounding the middle portion, the first tendency is from the outer peripheral portion of the electrical contact area 10 to the middle portion, the second tendency is from the outer peripheral portion of the electrical contact area 10 to the middle portion, the third tendency is from the middle portion to the outer peripheral portion of the electrical contact area 10, the third magnetic element 231 is located between the first magnetic element 211 and the second magnetic element 221 (as shown in fig. 10A and 10B), the arc bends from a position adjacent to the first magnetic element 211 in a first tendency (i.e., inward) under the action of the first magnetic field and then moves along a first expected trajectory (e.g., a first arc trajectory), and then bends from a position adjacent to the third magnetic element 231 in a third tendency (i.e., inward) under the action of the third magnetic field and then moves along a second expected trajectory (e., a second arc trajectory), and then bends from a position adjacent to the second magnetic element 221 in a second tendency (i.e., inward) under the action of the second magnetic field and then moves along a second expected trajectory (e., a third trajectory). Alternatively, the second magnetic element 221 is located between the first magnetic element 211 and the third magnetic element 231 (as shown in fig. 11A and 11B), the arc moves along a first desired trajectory (e.g., a first arc trajectory) after being bent in the first tendency (i.e., inward) from a position adjacent to the first magnetic element 211 by the first magnetic field, then moves along a fourth desired trajectory (e.g., a fourth arc trajectory) after being bent in the second tendency (i.e., outward) from a position adjacent to the second magnetic element 221 by the second magnetic field, and then moves along a fifth desired trajectory (e.g., a fifth arc trajectory) after being bent in the third tendency (i.e., inward) from a position adjacent to the third magnetic element 231 by the third magnetic field.

It is worth mentioning that the magnetic field strength of the first magnetic field formed by the first magnetic element 211 and the magnetic field strength of the third magnetic field formed by the third magnetic element 231 may be the same. The magnetic field strength of the first magnetic field formed by the first magnetic element 211 and the magnetic field strength of the third magnetic field formed by the third magnetic element 231 may also be different.

In another specific example of the present application, the strongest S-pole point of the first magnetic element 211 is directed toward the dynamic contact 12, the strongest N-pole point of the second magnetic element 221 is directed toward the dynamic contact 12, and the strongest S-pole point of the third magnetic element 231 is directed toward the dynamic contact 12. Fig. 12A and 13A illustrate the tendency of the first magnetic element 211, the second magnetic element 221, and the third magnetic element 231 to lorentz magnetic force of the arc, and fig. 12B and 13B illustrate the movement trajectory of the arc under the action of the first magnetic element 211, the second magnetic element 221, and the third magnetic element 231. The third magnetic element 231 is located between the first magnetic element 211 and the second magnetic element 221 (as shown in fig. 12A and 12B), or the second magnetic element 221 is located between the first magnetic element 211 and the third magnetic element 231 (as shown in fig. 13A and 13B).

In other embodiments of the present application, the third magnetic field generating element 23 is adjacent to the second magnetic field generating element 22, the first magnetic field generating element 21 generates a first magnetic field having a magnetic field direction different from a magnetic field direction of a second magnetic field generated by the second magnetic field, the third magnetic field generating element 23 generates a third magnetic field having a magnetic field direction different from the magnetic field direction generated by the first magnetic field generating element 21, and the third magnetic field generating element 23 generates a third magnetic field having a magnetic field direction identical to the magnetic field direction generated by the second magnetic field generating element 22. Specifically, an angle α 3 between the magnetic pole direction of the third magnetic element 231 and the magnetic pole direction of the first magnetic element 211 is greater than 0 ° and equal to or less than 90 °, or greater than 90 ° and less than 180 °, or equal to or more than 180 °. The concrete expression is as follows: an included angle between the third central axis L3 and the first central axis L1 is greater than 0 ° and less than or equal to 90 °, or greater than 90 ° and less than 180 °, or equal to 180 °.

In a specific example of the present application, the first magnetic element 211, the second magnetic element 221, and the third magnetic element 231 are parallel to each other, and a magnetic pole orientation of the first magnetic element 211 is opposite to a magnetic pole orientation of the second magnetic element 221, a magnetic pole orientation of the first magnetic element 211 is opposite to a magnetic pole orientation of the third magnetic element 231, and a magnetic pole orientation of the third magnetic element 231 is the same as a magnetic pole orientation of the second magnetic element 221.

In this particular example, the strongest N-pole point of the first magnetic element 211 is oriented toward the dynamic contact 12, the strongest S-pole point of the second magnetic element 221 is oriented toward the dynamic contact 12, and the strongest S-pole point of the third magnetic element 231 is oriented toward the dynamic contact 12. Fig. 14A illustrates the tendency of the first magnetic element 211, the second magnetic element 221, and the third magnetic element 231 to lorentz force of the arc, and fig. 14B illustrates the movement trajectory of the arc under the influence of the first magnetic element 211, the second magnetic element 221, and the third magnetic element 231. The first magnetic field formed by the first magnetic element 211 causes the arc to bend in a first tendency, the second magnetic field formed by the second magnetic element 221 causes the arc to bend in a second tendency, and the third magnetic field formed by the third magnetic element 231 causes the arc to bend in a third tendency, wherein the third tendency is the same as the second tendency and the third tendency is opposite to the first tendency.

It is worth mentioning that the magnetic field strength of the third magnetic field formed by the third magnetic element 231 may be the same as the magnetic field strength of the second magnetic field formed by the second magnetic element 221. The magnetic field strength of the second magnetic field formed by the second magnetic element 221 and the magnetic field strength of the third magnetic field formed by the third magnetic element 231 may be different.

In another specific example of the present application, the strongest S-pole point of the first magnetic element 211 is directed toward the dynamic contact 12, the strongest N-pole point of the second magnetic element 221 is directed toward the dynamic contact 12, and the strongest N-pole point of the third magnetic element 231 is directed toward the dynamic contact 12. Fig. 15A illustrates the tendency of the first magnetic element 211, the second magnetic element 221, and the third magnetic element 231 to lorentz force of the arc, and fig. 15B illustrates the movement trajectory of the arc under the influence of the first magnetic element 211, the second magnetic element 221, and the third magnetic element 231.

In other specific examples of the present application, the first magnetic element 211, the second magnetic element 221, and the third magnetic element 231 may be disposed in other disposition manners, for example, angles between the first magnetic element 211, the second magnetic element 221, and the third magnetic element 231 are adjusted so that the first magnetic element 211, the second magnetic element 221, and the third magnetic element 231 are not parallel to each other.

It is worth mentioning that in the embodiment of the present application, not only the arc is elongated by the magnet to realize arc extinction, but also the arc extinguishing groove 24 is configured for the deflected arc on the basis of the arc extinction by the magnet, the arc extinguishing groove 24 is disposed on the deflected path of the arc and acts as an intervention mechanism to externally intervene on the arc deflected by the magnetic field, and the arc extinguishing groove 24 can force the arc entering into it to be thinned and elongated based on the "narrow slit principle" to accelerate the breaking and extinguishing of the arc, in this way, the arc extinction capability of the arc breaking device is enhanced.

In the embodiment of the present application, the specific disposition of the magnetic field generating element will form a specific magnetic field, so that the arc is deflected in a specific manner, the deflection path of the arc can be determined according to the disposition of the magnetic field generating element, and at least one arc extinguishing chamber 24 is disposed on the deflection path of the arc, so that the arc enters the arc extinguishing chamber 24 after being deflected by the magnetic field generating element, and is elongated by being drawn.

In the embodiment of the present application, the arc is deflected by the magnetic field of the magnetic field generating element and bypasses around the magnetic field generating element. Accordingly, an arc chute 24 may be arranged around the magnetic field generating element and/or the dynamic contact 12. For example, at least one of said arc-chute 24 is arranged inside and/or outside said magnetic field generating element, and for example at least one arc-chute 24 is arranged on the left and/or right side of said magnetic field generating element.

In one specific example of the present application, the arc extinguishing structure 20 includes at least one first arc extinguishing groove 241 located at an outer side of the magnetic field assembly, a second arc extinguishing groove 242 located at an inner side of the magnetic field assembly, and at least one third arc extinguishing groove 243 located between adjacent magnetic field generating elements in the magnetic field assembly, as shown in fig. 6.

The arc is formed between the static contact 11 and the dynamic contact 12, and is movable up or down relative to the dynamic contact 12 under deflection of the magnetic field assembly. At least one of the first arc-extinguishing groove 241, at least one of the second arc-extinguishing groove 242 and at least one of the third arc-extinguishing groove 243 may be located on the upper side of the dynamic contact portion 12, or may be located on the lower side of the dynamic contact portion 12. In some embodiments of the present application, the arc extinguishing grooves 24 are disposed on both the upper and lower sides of the dynamic contact portion 12.

In summary, the arc breaking apparatus according to the embodiments of the present application is illustrated, which utilizes a magnet arc extinguishing scheme to extinguish arc, and adjusts a magnetic field formed by a magnetic field generating element by adjusting a disposition of the magnetic field generating element, so that the magnetic field formed by the magnetic field generating element forms a multi-bending arc extinguishing field, which can bend the arc in different ways to elongate the arc, accelerate the arc to be broken and extinguished, in such a way, the arc extinguishing capability of the arc breaking apparatus is enhanced.

According to the arc extinguishing principle of the arc breaking device, the application proposes an arc extinguishing method comprising: s110, forming a multi-bending arc extinguishing field area along the motion path of the movable contact part, wherein the multi-bending arc extinguishing field area comprises a first magnetic field and a second magnetic field which are different in magnetic field direction; and S120, bending the electric arc generated by the movable contact part in the process of separating from or contacting with the static contact part 11 in different modes through the multi-bending arc extinguishing field to elongate the electric arc.

In step S110, a multi-turn arc extinguishing field including a first magnetic field and a second magnetic field having different magnetic field directions is formed along a moving path of the moving contact. The first magnetic field may be formed by a first magnetic element 211 provided in the movement path of the dynamic contact part 12, or may be formed by a first coil 212 provided in the movement path of the dynamic contact part 12. The second magnetic field may be formed by the second magnetic element 221 provided in the movement path of the dynamic contact part 12, or may be formed by the second coil 222 provided in the movement path of the dynamic contact part 12.

The magnetic field direction of the first magnetic field may be made different from the magnetic field direction of the second magnetic field by adjusting the magnetic pole direction of the first magnetic element 211 and the magnetic pole direction of the second magnetic element 221. Accordingly, the angle between the magnetic pole direction of the first magnetic element 211 and the magnetic pole direction of the second magnetic element 221 is greater than 0 ° and equal to or less than 90 °, or greater than 90 ° and less than 180 °, or equal to or less than 180 °.

In some embodiments of the present application, the magnetic pole direction of the first magnetic element 211 is opposite to the magnetic pole direction of the second magnetic element 221. Specifically, the magnetic pole direction of the first magnetic element 211 is a direction in which the strongest N-pole point of the first magnetic element 211 points to the strongest S-pole point, the magnetic pole direction of the second magnetic element 221 is a direction in which the strongest N-pole point of the second magnetic element 221 points to the strongest S-pole point, and an included angle between the magnetic pole direction of the first magnetic element 211 and the magnetic pole direction of the second magnetic element 221 is 180 °.

The magnetic field direction of the first magnetic field and the magnetic field direction of the second magnetic field can be adjusted by adjusting the disposition of the first magnetic element 211 and the second magnetic element 221. In a specific example of the present application, the first magnetic element 211 and the second magnetic element 221 are parallel to each other, and the magnetic pole of the first magnetic element 211 is oriented opposite to the magnetic pole of the second magnetic element 221, such that the magnetic pole of the first magnetic element 211 is oriented opposite to the magnetic pole of the second magnetic element 221.

In some embodiments of the present application, the multi-turn switching field further comprises a third magnetic field formed by a third magnetic element 231 disposed in the path of motion of the dynamic contact 12 or by a third coil 232 disposed in the path of motion of the dynamic contact 12. The magnetic field direction of the third magnetic field is different from the magnetic field direction of the first magnetic field and/or different from the magnetic field direction of the second magnetic field.

In a specific example of the present application, the third magnetic element 231 forms the third magnetic field, the third magnetic element 231 is parallel to the first magnetic element 211 and the second magnetic element 221, and a magnetic pole direction of the third magnetic element 231 is the same as a magnetic pole direction of the second magnetic element 221 and opposite to the magnetic pole direction of the first magnetic element 211. In another specific example of the present application, the magnetic pole direction of the third magnetic element 231 is opposite to the magnetic pole direction of the second magnetic element 221, and is the same as the magnetic pole direction of the first magnetic element 211.

In step S120, the arc generated during the moving contact part separating from or contacting the static contact part 11 is differently bent by the multi-bending arc extinguishing field to elongate the arc. Specifically, when the magnetic field direction of the first magnetic field is different from the magnetic field direction of the second magnetic field, the first magnetic field and the second magnetic field deflect the arc in different directions, so that the arc bends in different directions. When the magnetic pole direction of the first magnetic element 211 and the magnetic pole direction of the second magnetic element 221 are opposite, the first magnetic field and the second magnetic field cause the arc to bend in opposite tendencies. Accordingly, in the process of differently bending the arc generated by the movable contact part during the separation or contact with the static contact part 11 through the multi-bending arc extinguishing field to elongate the arc, the arc is bent in a first tendency by the first magnetic field of the multi-bending arc extinguishing field, and the arc is bent in a second tendency by the second magnetic field of the multi-bending arc extinguishing field, wherein the first tendency is opposite to the second tendency.

When the multi-turn quenching field further includes a third magnetic field, and the magnetic pole direction of the third magnetic element 231 is opposite to the magnetic pole direction of the second magnetic element 221, and is the same as the magnetic pole direction of the first magnetic element 211, in the process of bending the arc generated by the movable contact part in the process of separating from or contacting with the static contact part 11 through the multi-turn quenching field in a different manner so as to elongate the arc, the arc is bent in a third trend through the third magnetic field of the multi-turn quenching field, wherein the third trend is opposite to the second trend, and the third trend is the same as the first trend.

In some embodiments of the present application, after the arc is bent in different manners by the multi-bending arc extinguishing field, the arc is guided to the at least one arc extinguishing chamber 24 by the multi-bending arc extinguishing field to thin and elongate the arc. Accordingly, in some embodiments of the present application, the arc extinguishing method further comprises: the arc is directed through the multi-turn arc extinguishing field to at least one arc chute 24.

The present application and its embodiments are described above, the description is not limited, and what is shown in the drawings is only one of the embodiments of the present application, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they do not inventively design similar structural embodiments and embodiments to the above-mentioned embodiments without departing from the spirit of the invention, and therefore all such modifications and changes are deemed to fall within the scope of the invention.

Claims (10)

1. An arc breaking apparatus, comprising: an electrical contact zone comprising at least one static contact and at least one dynamic contact, the dynamic contact being movable relative to the static contact so as to be adapted to control the arc breaking device to switch between an on-state and an off-state, wherein the dynamic contact is in contact with the static contact when the arc breaking device is switched to the on-state and the dynamic contact is separated from the static contact when the arc breaking device is switched to the off-state; and the arc extinguishing structure comprises at least two magnetic field generating elements arranged on a motion path of the dynamic contact part, the at least two magnetic field generating elements comprise a first magnetic field generating element forming a first magnetic field and a second magnetic field generating element forming a second magnetic field, and the magnetic field direction of the first magnetic field is different from that of the second magnetic field.

2. The arc breaking device of claim 1, wherein the first magnetic field generating element is a first magnetic element and the second magnetic field generating element is a second magnetic element.

3. The arc breaking device of claim 1, wherein the first magnetic field generating element is a first coil and the second magnetic field generating element is a second coil.

4. The arc breaking apparatus of claim 2, wherein the magnetic pole direction of the first magnetic element is a direction in which a strongest N-pole point of the first magnetic element points to a strongest S-pole, and the magnetic pole direction of the second magnetic element is a direction in which a strongest N-pole point of the second magnetic element points to a strongest S-pole.

5. The arc breaking device of claim 4, wherein an angle between a magnetic pole direction of the first magnetic element and a magnetic pole direction of the second magnetic element is greater than 0 ° and less than or equal to 90 °, or greater than 90 ° and less than 180 °.

6. The arc breaking device of claim 4, wherein an angle between a magnetic pole direction of the first magnetic element and a magnetic pole direction of the second magnetic element is 180 °.

7. The arc interrupting device of claim 6 wherein the first magnetic member and the second magnetic member are parallel to each other and have poles facing opposite to the poles of the second magnetic member, the first magnetic member having a first central axis and the second magnetic member having a second central axis, the first central axis of the first magnetic member being parallel to the second central axis of the second magnetic member.

8. The arc breaking device of claim 2, wherein the arc quenching structure further comprises a third magnetic field generating element adjacent to the second magnetic field generating element, a third magnetic field formed by the third magnetic field generating element having a magnetic field direction different from a magnetic field direction of the second magnetic field, the third magnetic field generating element being a third magnetic element, the third magnetic field having a magnetic field direction the same as the magnetic field direction of the first magnetic field.

9. The arc breaking device of claim 8, wherein the third magnetic field has a magnetic field direction that is the same as the magnetic field direction of the first magnetic field, the first magnetic element, the second magnetic element, and the third magnetic element are parallel to each other, and the magnetic pole of the first magnetic element is oriented opposite the magnetic pole of the second magnetic element, the magnetic pole of the third magnetic element is oriented opposite the magnetic pole of the second magnetic element, and the magnetic pole of the first magnetic element is oriented the same as the magnetic pole of the third magnetic element.

10. The arc breaking device according to any one of claims 1 to 9, wherein the first and second magnetic field generating elements correspond to the path of movement of the dynamic contact in the axial direction set by the arc breaking device.

Images