CN212990988U - High-voltage direct-current contactor capable of effectively performing magnetic blowout - Google Patents
High-voltage direct-current contactor capable of effectively performing magnetic blowout Download PDFInfo
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- CN212990988U CN212990988U CN202021932318.0U CN202021932318U CN212990988U CN 212990988 U CN212990988 U CN 212990988U CN 202021932318 U CN202021932318 U CN 202021932318U CN 212990988 U CN212990988 U CN 212990988U
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Abstract
The utility model provides an effective magnetic blowout's high voltage direct current contactor, including casing, electromagnetic system, contact system and arc extinguishing system, electromagnetic system sets up in the casing bottom, and contact system sets up in the electromagnetic system top, and arc extinguishing system and contact system are adjacent to be set up, arc extinguishing system includes the arc extinguishing chamber, and it is provided with mutual just right main magnetic source along the perpendicular to moves, static contact line direction in this arc extinguishing chamber, and the opposite face polarity of two main magnetic sources is opposite, wherein, the arc extinguishing intracavity still is provided with the vice magnetic source of a plurality of, vice magnetic source sets up dispersedly in the both sides of two main magnetic source lines, and the polarity of main magnetic source and adjacent vice magnetic source is opposite to produce the magnetic field route of many equidirectionals between main magnetic source and the adjacent vice magnetic source and move with the guide electric arc. And a secondary magnetic field is formed by additionally arranging an auxiliary magnetic source, so that an arc motion path is increased, and the arc extinguishing efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of the contactor technique and specifically relates to a high voltage direct current contactor of effective magnetic blowout arc extinguishing is related to.
Background
The high-voltage direct-current contactor is a switching element working in a power supply system, and when the power supply system needs to be connected or disconnected, the connection or disconnection of the contactor can be controlled by controlling a coil control end at the bottom of a voltage level, so that the purpose of connecting or disconnecting a high-voltage line is achieved. The contactor is composed of electromagnetic system (movable iron core, static iron core, electromagnetic coil), contact system and arc-extinguishing device. When the electromagnetic coil of the contactor is electrified, a strong magnetic field is generated, the static iron core generates electromagnetic attraction to attract the movable iron core and drive the contact to act: closing the contact; when the coil is powered off, the electromagnetic attraction disappears, the movable iron core is released under the action of the release spring, and the contact is restored: the contacts are opened.
The contact can generate electric arc in the on-off process, and the high temperature generated by the electric arc can lead the contact to be blackened, burnt and singed to generate metal particles, thereby directly influencing the service life of the current contactor. The general high-voltage direct-current contactor is generally used in the fields of novel energy automobiles, inverter power supplies and the like, the current can reach 400A or higher, the voltage is 500V-900V, and when the voltage is higher and higher, the problem of electric arc is more and more serious. The current common method for arc extinction is to adopt magnetic quenching, two permanent magnets are arranged oppositely in an arc extinction chamber or outside the arc extinction chamber to be used as magnetic conduction plates, meanwhile, the arc extinction chamber is isolated from the outside by adopting a sealing process and is filled with insulating arc extinction gas, and when electric arcs are generated, the directions of the electric arcs are guided and changed through magnetic fields between the magnetic conduction plates, so that the electric arcs can swim in the arc extinction gas, and the aim of arc extinction is fulfilled. However, since the magnetic field generated between the two magnetic conductive plates is perpendicular to the direction of the connection line of the two contacts, although the position of the arc may be different, the direction in which the arc is guided to travel is substantially fixed, which may cause the fixed position of the contact to be burned many times, which may easily cause the contactor to age rapidly due to the loss of the contact metal material during the opening and closing of the contact system, and the life of the contactor may be seriously lost.
Based on this, how to guide the arc to extend to different directions, avoiding the local concentrated ablation of the contact to prolong the service life of the contactor is one of the technical difficulties in the current field.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing an effective magnetic blow-out's high voltage direct current contactor forms the secondary magnetic field through adding establishing vice magnetic source, increases electric arc motion route, promotes arc extinguishing efficiency.
Based on the above purpose, the utility model provides an efficient magnetic quenching high voltage direct current contactor, which comprises a shell, an electromagnetic system, a contact system and an arc extinguishing system, wherein the electromagnetic system is arranged at the bottom of the shell, the contact system is arranged above the electromagnetic system, the arc extinguishing system is arranged adjacent to the contact system, the arc extinguishing system comprises an arc extinguishing chamber, main magnetic sources which are opposite to each other are arranged in the arc extinguishing chamber along the direction perpendicular to the connecting line of a movable contact and a fixed contact, the opposite faces of the two main magnetic sources have opposite polarities, wherein,
the arc extinguishing chamber is also internally provided with a plurality of auxiliary magnetic sources which are dispersedly arranged at two sides of the connecting line of the two main magnetic sources, and the polarities of the main magnetic sources and the adjacent auxiliary magnetic sources are opposite, so that a plurality of magnetic field paths in different directions are generated between the main magnetic sources and the adjacent auxiliary magnetic sources to guide the arc to move.
Preferably, the magnetic field strength of the secondary magnetic source is less than the magnetic field strength of the primary magnetic source.
Preferably, the primary magnetic source and the secondary magnetic source are both permanent magnets.
Preferably, the secondary magnetic source and the main magnetic source are located on the same tangent plane.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses an add and establish vice magnetic source, form secondary magnetic field in the explosion chamber, increase electric arc motion route, promote arc extinguishing efficiency.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic diagram of the internal structure of an embodiment of the present invention;
FIG. 2 is a schematic sectional view taken along line A-A in FIG. 1;
wherein, 1, a shell; 2. an electromagnetic system; 3. an arc extinguishing chamber;
31. a first primary magnetic source; 32. a second primary magnetic source; 33. a first secondary magnetic source; 34. a second secondary magnetic source; 35. a third secondary magnetic source; 36. a fourth secondary magnetic source;
41. a moving contact; 42. and (7) carrying out static contact.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiment provides a high-voltage direct-current contactor capable of effectively performing magnetic quenching, as shown in fig. 1, the high-voltage direct-current contactor comprises a shell 1, an electromagnetic system 2, a contact system and an arc extinguishing system, wherein the electromagnetic system 2 is arranged at the bottom of the shell 1, the contact system is arranged above the electromagnetic system 2, the arc extinguishing system 3 is arranged adjacent to the contact system, the arc extinguishing system comprises an arc extinguishing chamber 3, main magnetic sources opposite to each other are arranged in the arc extinguishing chamber 3 along a direction perpendicular to a connecting line of a moving contact 41 and a fixed contact 42, opposite faces of the two main magnetic sources have opposite polarities, wherein,
the arc extinguishing chamber 3 is also internally provided with a plurality of auxiliary magnetic sources which are dispersedly arranged at two sides of the connecting line of the two main magnetic sources, and the polarities of the main magnetic sources and the adjacent auxiliary magnetic sources are opposite, so that a plurality of magnetic field paths in different directions are generated between the main magnetic sources and the adjacent auxiliary magnetic sources to guide the arc motion.
In a preferred embodiment, the secondary magnetic source has a magnetic field strength less than that of the primary magnetic source.
In a preferred embodiment, the primary and secondary sources are permanent magnets.
In a preferred embodiment, the secondary magnetic source and the primary magnetic source are located on the same tangent plane.
As shown in fig. 2, the two main magnetic sources are a first main magnetic source 31 and a second main magnetic source 32; the number of the auxiliary magnetic sources is four, and the four auxiliary magnetic sources are respectively a first auxiliary magnetic source 33, a second auxiliary magnetic source 34, a third auxiliary magnetic source 35 and a fourth auxiliary magnetic source 36;
a first main magnetic source 31 is arranged in a space on one side of the arc extinguishing chamber 3, the first main magnetic source 31 and a second main magnetic source 32 are arranged oppositely, a first auxiliary magnetic source 33 and a second auxiliary magnetic source 34 are respectively arranged on two sides of the first main magnetic source 31, the second main magnetic source 32 is arranged in a space on the other side of the arc extinguishing chamber 3, a third auxiliary magnetic source 35 and a fourth auxiliary magnetic source 36 are respectively arranged on two sides of the second main magnetic source 32, the polarity of the opposite surface of the first main magnetic source 31 and the second main magnetic source 32 is opposite, the first main magnetic source 31 is respectively arranged reversely with the first auxiliary magnetic source 33 and the second auxiliary magnetic source 34, the second main magnetic source 32 is respectively arranged reversely with the third auxiliary magnetic source 35 and the fourth auxiliary magnetic source 36, the first auxiliary magnetic source 33 and the third auxiliary magnetic source 35 are opposite in polarity, and the second auxiliary magnetic source 34 and the fourth auxiliary magnetic source 36 are opposite in polarity; based on the structure, the direction of the magnetic field in the arc extinguishing chamber 3 is shown as the arrow in fig. 2, so a plurality of secondary magnetic fields are generated, and because the magnetic field intensity between the main magnetic sources is different from the magnetic field intensity between the main magnetic sources and the auxiliary magnetic sources or between the auxiliary magnetic sources, the secondary magnetic fields except the magnetic field between the main magnetic sources are formed in the arc extinguishing chamber 3, and the arc moving path is increased. The utility model discloses an add and establish vice magnetic source, form secondary magnetic field in the explosion chamber, increase electric arc motion route, promote arc extinguishing efficiency.
Although the embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the spirit and scope of the present invention, and that any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (4)
1. A high-voltage direct-current contactor capable of effectively performing magnetic quenching comprises a shell, an electromagnetic system, a contact system and an arc extinguishing system, wherein the electromagnetic system is arranged at the bottom of the shell, the contact system is arranged above the electromagnetic system, the arc extinguishing system is arranged adjacent to the contact system, the arc extinguishing system comprises an arc extinguishing cavity, main magnetic sources which are opposite to each other are arranged in the arc extinguishing cavity along a direction vertical to a connecting line of a movable contact and a fixed contact, opposite surfaces of the two main magnetic sources have opposite polarities, and the high-voltage direct-current contactor is characterized in that,
the arc extinguishing chamber is also internally provided with a plurality of auxiliary magnetic sources which are dispersedly arranged at two sides of the connecting line of the two main magnetic sources, and the polarities of the main magnetic sources and the adjacent auxiliary magnetic sources are opposite, so that a plurality of magnetic field paths in different directions are generated between the main magnetic sources and the adjacent auxiliary magnetic sources to guide the arc to move.
2. The efficient magnetic quenching high voltage dc contactor of claim 1, wherein the secondary magnetic source has a magnetic field strength less than the magnetic field strength of the primary magnetic source.
3. The efficient magnetic quenching high voltage direct current contactor as claimed in claim 1, wherein the primary and secondary magnetic sources are permanent magnets.
4. The efficient magnetic quenching high voltage direct current contactor as claimed in claim 1, wherein the secondary magnetic source and the primary magnetic source are located on the same tangent plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021932318.0U CN212990988U (en) | 2020-09-07 | 2020-09-07 | High-voltage direct-current contactor capable of effectively performing magnetic blowout |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021932318.0U CN212990988U (en) | 2020-09-07 | 2020-09-07 | High-voltage direct-current contactor capable of effectively performing magnetic blowout |
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| Publication Number | Publication Date |
|---|---|
| CN212990988U true CN212990988U (en) | 2021-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021932318.0U Active CN212990988U (en) | 2020-09-07 | 2020-09-07 | High-voltage direct-current contactor capable of effectively performing magnetic blowout |
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| Country | Link |
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| CN (1) | CN212990988U (en) |
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- 2020-09-07 CN CN202021932318.0U patent/CN212990988U/en active Active
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