CN113097006B - Vacuum arc-extinguishing chamber structure based on radial multipole orientation magnetic field regulation and control - Google Patents
Vacuum arc-extinguishing chamber structure based on radial multipole orientation magnetic field regulation and control Download PDFInfo
- Publication number
- CN113097006B CN113097006B CN202110272976.4A CN202110272976A CN113097006B CN 113097006 B CN113097006 B CN 113097006B CN 202110272976 A CN202110272976 A CN 202110272976A CN 113097006 B CN113097006 B CN 113097006B
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- Prior art keywords
- permanent magnet
- contact
- framework
- shielding cover
- magnetic field
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 58
- 230000005405 multipole Effects 0.000 title claims abstract description 18
- 230000003068 static effect Effects 0.000 claims abstract description 8
- 230000000903 blocking effect Effects 0.000 claims abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 230000003628 erosive effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005292 diamagnetic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a vacuum arc-extinguishing chamber structure based on radial multipole orientation magnetic field regulation and control, which comprises a moving contact, a fixed contact, a first permanent magnet, a second permanent magnet, a third permanent magnet, a fourth permanent magnet, a magnetic blocking plate, a shielding cover, an upper end cover, a lower end cover and a moving contact rod. The fixed contact and the movable contact are oppositely arranged to form a discharge structure, the first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet are fixed on the inner side of the shielding cover through the framework and are arranged on the outer side of the discharge structure, the space positions of each pole of the permanent magnets are different by 45 degrees, and the shielding cover is arranged on the outer side of the magnets and the outer side of the framework and can cover the permanent magnets. The invention has simple structure and low manufacturing cost, and can maintain residual charge in the middle of the contact after the arc of the moving contact and the static contact is drawn by additionally arranging the permanent magnet on the basis of the structure of the existing vacuum arc extinguishing chamber, thereby solving the problem of re-burning after the arc of the vacuum arc extinguishing chamber.
Description
Technical Field
The invention belongs to the field of vacuum switch electric arcs, and particularly relates to a vacuum arc-extinguishing chamber structure based on radial multipole orientation magnetic field regulation.
Background
The vacuum switch has dominant advantages in the middle-low voltage field, has the advantages of high medium recovery speed, environmental protection, long electrical life and the like, and is widely applied in the middle-low voltage field. Along with the development of vacuum switch technology, the contact structure commonly used at present comprises a transverse magnetic field contact structure and a longitudinal magnetic field contact structure, wherein the transverse magnetic field contact structure comprises a spiral groove contact, a cup-shaped contact structure and the like, the arc extinguishing chamber principle is that vacuum arc rotates at a high speed on the surface of the contact through a transverse magnetic field generated by current flowing through the contact, the local high-temperature ablation of the surface of the contact is avoided, the breaking capacity is further improved, and after the arc is broken, a main shielding cover adsorbs charges to enable a gap of the contact to be reburnt. The invention adopts the permanent magnets uniformly arranged on the inner side of the vacuum arc-extinguishing chamber shielding cover, and the generated magnetic field can lead the moving charges to move towards the middle part of the contact gap under the action of Lorentz force, so that the charges are maintained in the middle of the contact, and the reburning of the vacuum arc-extinguishing chamber after the arc is avoided. The method adopts the isolation permanent magnet, has lower cost, adopts the commercial vacuum arc-extinguishing chamber, does not need to open an electric arc observation window, and is a post-arc re-ignition preventing structure for the commercial transverse magnetic field vacuum arc-extinguishing chamber with low cost.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a vacuum arc-extinguishing chamber structure based on radial multipole orientation magnetic field regulation.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides a vacuum interrupter structure based on radial multipole orientation magnetic field regulation and control which characterized in that includes: the magnetic shielding device comprises a first permanent magnet (1), a second permanent magnet (2), a third permanent magnet (3), a fourth permanent magnet (4), a moving contact (5), a fixed contact (6), a shielding cover (7), an upper end cover (8), a lower end cover (9), a moving contact rod (10) framework (11), a magnetic shielding plate (12) and the like.
Further, each pair of N-S magnetic poles of the 4 pairs of permanent magnets are adjacently arranged and fixed on the inner side of the shielding cover through the framework, and the 4 pairs of permanent magnets are symmetrically arranged so that the angle between the adjacent N and S magnetic poles is 45 degrees.
Furthermore, the two ends of the fixed contact are respectively a fixed contact upper end cover connecting section and a fixed contact discharging end, the two ends of the moving contact are respectively a moving contact lower end cover connecting section and a moving contact discharging end, and the positions of the 4 pairs of magnetic poles are not more than the moving contact discharging end and the fixed contact discharging end.
Further, the first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet are adjacent in polarity, namely the N pole face of the first permanent magnet is adjacent to the S pole face of the first permanent magnet, or the N pole face of the second permanent magnet is adjacent to the S pole face of the second permanent magnet, or the N pole face of the third permanent magnet is adjacent to the S pole face of the third permanent magnet, or the N pole face of the fourth permanent magnet is adjacent to the S pole face of the fourth permanent magnet.
Further, the shield is made of copper material because copper has diamagnetic physical properties.
Furthermore, the invention provides a vacuum arc-extinguishing chamber, and the arc-extinguishing structure adopts the nonpolar arc-extinguishing structure based on radial multipole orientation magnetic field regulation and control.
The invention has the beneficial effects that: through setting up the permanent magnet in the structure both sides that discharge that moving contact and static contact formed, adjust the polarity position of permanent magnet, realized that the residual charge that remains after moving contact draws the arc moves to moving contact discharge gap's middle part under the effect of lorentz force, avoided main shield to adsorb the charge and can make the contact gap reburning. According to the invention, the first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet are fixed on the inner side of the main shielding cover through the framework, the structure is separated from a discharge structure formed by the moving contact and the fixed contact through the framework, and the erosion of the permanent magnet caused by electric arcs between the moving contact and the fixed contact is avoided. The invention has simple structure and low manufacturing cost, and can maintain residual charge in the middle of the contact after the arc of the moving contact and the static contact is drawn by additionally arranging the permanent magnet on the basis of the structure of the existing vacuum arc extinguishing chamber, thereby solving the problem of re-burning after the arc of the vacuum arc extinguishing chamber.
Drawings
Fig. 1 is a schematic diagram of a front view of a vacuum interrupter structure based on radial multipole orientation magnetic field regulation in accordance with the present disclosure; FIG. 2 is a schematic diagram of the basic principle of magnetic field regulation based on radial multipole orientation according to the present disclosure; fig. 3 is a schematic diagram of negative charge stress direction based on radial multipole orientation magnetic field modulation according to the present disclosure.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1, a vacuum interrupter structure based on radial multipole orientation magnetic field regulation, comprising: the magnetic resistance device comprises a first permanent magnet (1), a second permanent magnet (2), a third permanent magnet (3), a fourth permanent magnet (4), a moving contact (5), a fixed contact (6), a shielding cover (7), an upper end cover (8), a lower end cover (9), a framework (11), a magnetic resistance plate (12) and the like. The moving contact 5 and the fixed contact 6 are arranged opposite to each other to form a discharge structure; the first permanent magnet 1, the second permanent magnet 2, the third permanent magnet 3 and the fourth permanent magnet 4 are respectively arranged on two sides of a discharge structure and are fixed on the inner side of a shielding cover 7 through a framework, the shielding cover can cover the first permanent magnet 1, the second permanent magnet 2, the third permanent magnet 3 and the fourth permanent magnet 4, the structure is separated from the discharge structure formed by a moving contact and a fixed contact through the framework, and the erosion of the permanent magnet caused by electric arcs between the moving contact and the fixed contact is avoided. The first permanent magnet 1-N is adjacent to the first permanent magnet 1-S, the second permanent magnet 2-N is adjacent to the second permanent magnet 2-S, the third permanent magnet 3-N is adjacent to the third permanent magnet 3-S, the fourth permanent magnet 4-N is adjacent to the fourth permanent magnet 4-S, each pair of N-S magnetic poles of the 4 pairs of permanent magnets are adjacently placed and fixed on the inner side of the shielding cover through a framework, and the 4 pairs of permanent magnets are symmetrically placed to enable the angle between the adjacent N and S magnetic poles to be 45 degrees. The two ends of the moving contact 5 are respectively a moving contact rod 10 and a moving contact discharge end, and the two ends of the fixed contact 6 are respectively an upper end cover 8 and a fixed contact discharge end.
Referring first to fig. 1-3, fig. 1 is a schematic diagram of a front view of a vacuum interrupter based on radial multipole orientation magnetic field regulation in accordance with the present disclosure; FIG. 2 is a schematic diagram of the basic principle of magnetic field regulation based on radial multipole orientation according to the present disclosure; fig. 3 is a schematic diagram of negative charge stress direction based on radial multipole orientation magnetic field modulation according to the present disclosure.
The structure of the vacuum arc-extinguishing chamber based on radial multipolar orientation magnetic field regulation is shown in fig. 1, 8 permanent magnet magnetic poles are uniformly arranged on the inner side of a shielding case of the vacuum arc-extinguishing chamber, a schematic diagram of the working principle based on radial multipolar orientation magnetic field regulation is shown in fig. 2, when a moving contact and a fixed contact arc is drawn, residual charges between discharge gaps formed by the moving contact and the fixed contact have initial speeds, when the residual charges are close to a permanent magnet fixed on the shielding case, the magnetic field formed by four pairs of permanent magnets can enable the residual charges to incline towards the middle part of the moving contact and the fixed contact under the action of Lorentz force, and residual charges are prevented from remaining on the main shielding case, so that the contact gaps are prevented from being reburnt.
The signals of the permanent magnets arranged inside the vacuum interrupter shield are shown in fig. 2. In order to realize the working process, the structure of the invention is shown in fig. 3, wherein the vacuum arc-extinguishing chamber is a commercial transverse magnetic field vacuum arc-extinguishing chamber and comprises an upper end cover 8, a lower end cover 9, a movable contact rod 10, a fixed moving contact in the arc-extinguishing chamber, a shielding cover and the like, 4 pairs of additional permanent magnets 4 are fixed at the middle position of the fixed moving contact in the arc-extinguishing chamber and are positioned on an insulating shell, 8 magnetic poles are uniformly arranged on the inner side of the shielding cover of the vacuum arc-extinguishing chamber through a permanent magnet framework, and the space positions of each magnetic pole differ by 45 degrees. The additional permanent magnet device comprises permanent magnets 1, 2,3 and 4 and a framework 11, and a specific structure diagram is shown in fig. 3. Wherein 1, 2,3, 4 are respectively a first permanent magnet, a second permanent magnet, a third permanent magnet and a fourth permanent magnet, 7 is a copper shielding cover, 11 is a permanent magnet framework, and 12 is a magnetic blocking plate. The 8 magnetic poles (1-N, 1-S, 2-N, 2-S, 3-N, 3-S, 4-N and 4-S respectively) are fixed through a framework and are arranged on the inner side of the copper shielding cover, and the inner side of the copper shielding cover is exactly consistent with the middle position of the static and moving contact, so that residual charges in a contact gap effectively move towards the middle of the gap under the action of a permanent magnet field. (the arrow in FIG. 3 is the direction of the Lorentz force of the negative charge under the magnetic field.)
Claims (4)
1. The utility model provides a vacuum interrupter structure based on radial multipole orientation magnetic field regulation and control which characterized in that includes: the device comprises a first permanent magnet, a second permanent magnet, a third permanent magnet, a fourth permanent magnet, a moving contact, a fixed contact, a shielding cover, an upper end cover, a lower end cover, a framework and a magnetic resistance plate, wherein the moving contact and the fixed contact are oppositely arranged to form a discharge structure; the first permanent magnet, the third permanent magnet are respectively arranged at two sides of the discharge structure, the second permanent magnet and the fourth permanent magnet are respectively arranged at two sides of the discharge structure and are fixed at the inner side of the shielding cover through the framework, the shielding cover can cover the first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet, the structure is separated from the discharge structure formed by the moving contact and the static contact through the framework, and the erosion of the permanent magnet caused by electric arcs between the moving contact and the static contact is avoided; the first permanent magnet 1-N is adjacent to the first permanent magnet 1-S, the second permanent magnet 2-N is adjacent to the second permanent magnet 2-S, the third permanent magnet 3-N is adjacent to the third permanent magnet 3-S, the fourth permanent magnet 4-N is adjacent to the fourth permanent magnet 4-S, each pair of N-S magnetic poles of the four pairs of permanent magnets are adjacently arranged and fixed on the inner side of the shielding cover through a framework, the four pairs of permanent magnets are symmetrically arranged to enable the angle between the adjacent N and S magnetic poles to be 45 degrees, the two ends of the movable contact are respectively a movable contact rod and a movable contact discharging end, and the two ends of the fixed contact are respectively an upper end cover and a fixed contact discharging end;
the framework is a circular framework, four pairs of N-S magnetic poles are uniformly arranged on the circular framework, a magnetic blocking plate is arranged between two adjacent pairs of N-S magnetic poles, and the magnetic poles on two sides of each magnetic blocking plate are opposite;
8 magnetic poles are uniformly arranged on the inner side of a shielding cover of the vacuum arc-extinguishing chamber, and the 8 magnetic poles are fixed and installed on the inner side of the shielding cover through a framework and are just consistent with the middle position of a static moving contact, so that residual charges in a contact gap move towards the middle of the gap under the action of a permanent magnet magnetic field; when the residual charges are close to the permanent magnets fixed on the shielding cover, the magnetic fields formed by the four pairs of N-S magnetic poles enable the residual charges to incline towards the middle of the moving and static contact gaps under the action of Lorentz force, so that the residual charges are prevented from remaining on the shielding cover, and further the contact gaps are prevented from being reburned.
2. The vacuum interrupter structure based on radial multipole orientation magnetic field regulation of claim 1, wherein the positions of the four pairs of N-S magnetic poles do not exceed the moving contact discharge end and the fixed contact discharge end.
3. The vacuum interrupter structure based on radial multipole orientation magnetic field regulation of claim 1, wherein the shield is made of copper material.
4. A vacuum interrupter, characterized in that: an arc extinguishing structure adopts the vacuum arc extinguishing chamber structure based on radial multipole orientation magnetic field regulation and control as claimed in any one of claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110272976.4A CN113097006B (en) | 2021-03-14 | 2021-03-14 | Vacuum arc-extinguishing chamber structure based on radial multipole orientation magnetic field regulation and control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110272976.4A CN113097006B (en) | 2021-03-14 | 2021-03-14 | Vacuum arc-extinguishing chamber structure based on radial multipole orientation magnetic field regulation and control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113097006A CN113097006A (en) | 2021-07-09 |
| CN113097006B true CN113097006B (en) | 2024-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110272976.4A Active CN113097006B (en) | 2021-03-14 | 2021-03-14 | Vacuum arc-extinguishing chamber structure based on radial multipole orientation magnetic field regulation and control |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114695015B (en) * | 2022-04-28 | 2024-05-17 | 西安交通大学 | Vacuum arc-extinguishing chamber based on longitudinal magnetic field of halbach permanent magnet |
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|---|---|---|---|---|
| DE4139834A1 (en) * | 1991-12-03 | 1993-06-09 | Siemens Ag, 8000 Muenchen, De | VACUUM SWITCH |
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| US9373468B2 (en) * | 2014-09-16 | 2016-06-21 | Tyco Electronics Corporation | Arc control for contactor assembly |
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2021
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| US6506992B2 (en) * | 2000-10-16 | 2003-01-14 | Lg Industrial Systems Co., Ltd. | Vacuum interrupter for vacuum breaker |
| JP2003151413A (en) * | 2001-11-15 | 2003-05-23 | Meidensha Corp | Contact piece of vacuum interrupter |
| CN101622683A (en) * | 2007-03-27 | 2010-01-06 | 施耐德电器工业公司 | Bistable electromagnetic actuator, the control circuit of dual coil electromagnetic actuator and the dual coil electromagnetic actuator that comprises this control circuit |
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| CN111489941A (en) * | 2020-05-19 | 2020-08-04 | 浙江零壹智能电器研究院有限公司 | Non-polar arc extinguishing structure with permanent magnet and miniature circuit breaker |
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| CN113097006A (en) | 2021-07-09 |
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