CN110085475A - Vacuum interrupter Double-coil type structure of contact terminal in mechanical high-voltage dc circuit breaker - Google Patents
Vacuum interrupter Double-coil type structure of contact terminal in mechanical high-voltage dc circuit breaker Download PDFInfo
- Publication number
- CN110085475A CN110085475A CN201910398018.4A CN201910398018A CN110085475A CN 110085475 A CN110085475 A CN 110085475A CN 201910398018 A CN201910398018 A CN 201910398018A CN 110085475 A CN110085475 A CN 110085475A
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- contact
- loop coil
- annulus
- conducting rod
- coil
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- 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
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The present invention relates to vacuum interrupter Double-coil type structure of contact terminals in a kind of mechanical high-voltage dc circuit breaker, it is made of two identical structure of contact terminals, conducting rod is T-type cylindrical bar, and conducting rod major part disc diameter and loop coil, the outer diameter of annulus contact is all the same, conducting rod major part disc, loop coil and annulus contact successively stack connection, two joint faces are other than convex portion, rest part all made of polytetrafluoroethylene (PTFE) or the higher insulating materials of intensity insulate annular gasket planar support, electric arc is generated between two contacts when contact separates, arc-distribution is on the entire annular surface of annulus contact, so that electric current is flowed along loop coil flows into annulus contact further along connection conductor after a week, very big longitudinal magnetic field is generated when electric current is flowed along loop coil between contact, and structure guarantee is not extruded Deformation, structure is simple, and electrical contact endurance is longer, has just elongated electric arc when electric arc is drawn to coil inside, electric arc is made to be more easier to extinguish.
Description
Technical field
The present invention relates to a kind of high voltage DC breaker, in particular to vacuum is gone out in a kind of mechanical high-voltage dc circuit breaker
Arc chamber Double-coil type structure of contact terminal.
Background technique
Mechanical high-voltage dc circuit breaker working principle is as shown in Figure 1.It includes three branches: branch one is by high pressure vacuum
Breaker composition, branch two are that electric current shifts branch, are that charging capacitor and inductance connect to form the branch of high-frequency current；Branch three
For arrester branch.Start arcing in high-pressure vacuum breaker after the opening of branch one, the IGCT switch of branch two closes quickly
(typical time difference is Millisecond), pours branch one for high-frequency current, so that is flowed through in high-pressure vacuum breaker is to be superimposed with
The current amplitude of the DC current of high frequency oscillating current, high frequency oscillating current is bigger than DC current, therefore branch is once there is electricity
Flow through zero point, the mechanical chopper of branch one arc extinction in current over-zero.It is Fast Speed Vacuum Circuit Breaker used in branch one,
It realizes high-speed breaking using electromagnetic repulsion mechanism, cut-offs high-frequency current using vacuum interrupter.
This vacuum interrupter is exactly the vacuum interrupter used when cut-offfing power current always at present.Common vacuum
Arc-chutes improve the connecting-disconnecting function of vacuum interrupter using vertical magnetic or horizontal magnetic contact.Fig. 2 a 2b show a kind of coil type
Vertical magnetic structure of contact terminal, it can generate the diffusion that very strong longitudinal magnetic field carrys out bound electron when cut-offfing power current, generate magnetic
Mirror effect, to reduce arc voltage, so that the energy of electric arc reduces when arcing, therefore electric arc more holds when arc current zero passage
Easily it is off.Fig. 3 show this coil type and indulges the Distribution of Magnetic Field that magnetic contact generates under various different frequencies along axis.It can
See that the coil type that can generate very high-intensity magnetic field originally in high frequency indulges the magnetic field very little that magnetic contact generates, it is almost nil.But it is mechanical
The frequency of the high voltage vacuum interrupter of the formula high voltage DC breaker high-frequency current to be cut-off is 1kHz-10kHz, there are commonly
3.8kHz can also generate longitudinal magnetic field, conventional raising magnetic to solve the structure of contact terminal of the vacuum interrupter under this frequency
Method are as follows: ferromagnetic material is added in the cavity of contact come reinforce magnetic field, additional outer coiling produces on vacuum gap
Magnetisation field, fluting reduces vortes interference to reduce vortex on contact blade.But these specific methods are found after calculating
These methods all do not work to high frequency, these methods coil type shown in Fig. 2 indulges magnetic structure of contact terminal when frequency is 3.8kHz
Gap in the magnetic field that generates it is substantially zeroed.
Summary of the invention
The problem of being difficult to improve the present invention be directed to the magnetic field of vacuum interrupter under prior art high frequency, proposes a kind of machine
Vacuum interrupter Double-coil type structure of contact terminal, enables structure of contact terminal to produce at high frequencies in tool formula high voltage DC breaker
Raw very big magnetic field, this magnetic field can help to extinguish the vacuum arc of high-frequency current generation well.
The technical solution of the present invention is as follows: vacuum interrupter Double-coil type contact knot in a kind of mechanical high-voltage dc circuit breaker
Structure is made of two identical structure of contact terminals, and each contact includes a not closed loop coil, insulation annular gasket
Apertured annulus contact is opened with one, and conducting rod is T-type cylindrical bar, and conducting rod major part disc diameter and loop coil, circle
The outer diameter of ring contact is all the same, there is a metal bump, conducting rod major part circle on conducting rod major part disc and on loop coil
Face, loop coil and annulus contact successively stack connection, and two joint faces are other than convex portion, and rest part is all with poly- four
Insulate annular gasket planar support made of vinyl fluoride or the higher insulating materials of intensity, and metal bump makes conducting rod, ring
Shape coil and the electrical connection of annulus contact, generate electric arc between two contacts when contact separates, arc-distribution is whole in annulus contact
On a annular surface, so that electric current is flowed along loop coil flows into annulus contact, electric current edge further along connection conductor after a week
Loop coil flowing when longitudinal magnetic field is generated between contact.
The beneficial effects of the present invention are: vacuum interrupter Double-coil type touches in mechanical high-voltage dc circuit breaker of the present invention
Header structure, structure of contact terminal directly generate very big longitudinal magnetic field but also are not easy to be deformed, and the structure is not only simple, section
Raw material are saved, and electrical contact endurance is longer, has just elongated electric arc when electric arc is drawn to coil inside, has been more easier electric arc
Extinguish.
Detailed description of the invention
Fig. 1 is mechanical high-voltage dc circuit breaker working principle diagram；
Fig. 2 a is that coil type indulges magnetic structure of contact terminal exploded view；
Fig. 2 b is that coil type indulges magnetic structure of contact terminal schematic diagram；
Fig. 3 is the magnetic field comparison diagram under high frequency and under power frequency in the vacuum interrupter of Fast Speed Vacuum Circuit Breaker；
Fig. 4 is vacuum interrupter Double-coil type structure of contact terminal perspective view in mechanical high-voltage dc circuit breaker of the present invention；
Fig. 5 is vacuum interrupter Double-coil type structure of contact terminal front view in mechanical high-voltage dc circuit breaker of the present invention；
Fig. 6 is that difference is opened away from the longitudinal flux generated in lower contact gap when cut-offfing same electric current in vacuum interrupter of the present invention
Field figure.
Specific embodiment
Vacuum interrupter Double-coil type structure of contact terminal is as shown in Figures 4 and 5 in mechanical high-voltage dc circuit breaker of the present invention.
It is made of two identical contacts, each contact includes a not closed loop coil, insulate annular gasket and one
Open apertured annulus contact.Conducting rod is T-type cylindrical bar, and conducting rod major part disc diameter and loop coil, annulus contact
Outer diameter it is all the same, have on conducting rod major part disc and a metal bump, conducting rod major part disc, annular on loop coil
Coil and annulus contact successively stack connection, and joint face is in addition to convex portion, and rest part is all with polytetrafluoroethylene (PTFE) or strong
The annular gasket planar support that insulate made of higher insulating materials is spent, metal bump makes conducting rod, loop coil and annulus
Contact electrical connection, metal bump optimum position are as shown in Figure 4,5.
It is connected between loop coil plane and annulus contact with conductor, the major part disc of loop coil and conducting rod also uses
Conductor is connected, rest part high-strength insulating gasket planar support.The material of annulus contact uses current break performance very
Good CuCr contact material, the annulus contact surface and cylinder inner and outer surfaces all use CuCr material.Loop coil and conducting rod
High-strength insulating material planar support is all used in addition to the outer rest part of metal connection in connection.When contact separates they it
Between generate electric arc, arc-distribution is on the entire annular surface of annulus contact, so that electric current flows after a week again along loop coil
Annulus contact is flowed into along connection conductor.Due to the effect of fluting so that eddy current effect very little on annulus contact, and due to
Annulus contact covers the area very little of coil, therefore generates longitudinal flux between contact when electric current is flowed along loop coil
, this is beneficial to electric arc is extinguished, so that the drop-out current ability of such structure of contact terminal becomes strong.
Structure of contact terminal of the invention is used in vacuum interrupter, difference is opened away between lower contact when same electric current is cut-off in calculating
The longitudinal magnetic field generated in gap, as shown in Figure 6.As can see from Figure 6 with open away from increase magnetic field decline.But at coil
Magnetic field is very big.This has very big benefit to electric arc is extinguished.This structure of contact terminal is very simple.And it is big due to increasing intensity
Insulating materials as the gasket contact in closing course generated impact force will not by coil and the moving conductive rod of increase it
Between gap reduce or deformation, the shape of coil is easy to remain unchanged, and coil type longitudinal field contact used before it
Coil in without gasket, and there are also whole contact blade before coil, such structure is not only easy the production when closing contact
The gap of coil is squeezed and deformed under the action of raw impact force and leads to gap never again, without gap just without line
Circle, can not also generate longitudinal magnetic field.In addition the structure in high frequency before this coil with contact blade can not also generate longitudinal direction
Magnetic field.Structure of contact terminal now of the invention directly generates very big longitudinal magnetic field but also is not easy to be deformed, the structure
It is not only simple, raw material are saved, and electrical contact endurance is longer.Therefore this Double-coil type structure of contact terminal not only component it is few but also
Have also achieved the effect being unable to reach using more components.
Claims (1)
1. vacuum interrupter Double-coil type structure of contact terminal in a kind of mechanical high-voltage dc circuit breaker, which is characterized in that by two
Identical structure of contact terminal is constituted, and each contact is opened including a not closed loop coil, insulation annular gasket and one
Apertured annulus contact, conducting rod be T-type cylindrical bar, and conducting rod major part disc diameter and loop coil, annulus contact
Outer diameter is all the same, has on conducting rod major part disc and a metal bump, conducting rod major part disc, toroid on loop coil
Circle and annulus contact successively stack connection, two joint faces other than convex portion, rest part all use polytetrafluoroethylene (PTFE) or
Insulate made of the higher insulating materials of person's intensity annular gasket planar support, metal bump make conducting rod, loop coil and
The electrical connection of annulus contact, generates electric arc between two contacts when contact separates, and arc-distribution is in the entire annular table of annulus contact
On face, so that electric current is flowed along loop coil flows into annulus contact further along connection conductor after a week, electric current is along toroid
Longitudinal magnetic field is generated between contact when circle flowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910398018.4A CN110085475B (en) | 2019-05-14 | 2019-05-14 | Double-coil contact structure of vacuum arc extinguish chamber in mechanical high-voltage direct-current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910398018.4A CN110085475B (en) | 2019-05-14 | 2019-05-14 | Double-coil contact structure of vacuum arc extinguish chamber in mechanical high-voltage direct-current circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110085475A true CN110085475A (en) | 2019-08-02 |
| CN110085475B CN110085475B (en) | 2021-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910398018.4A Active CN110085475B (en) | 2019-05-14 | 2019-05-14 | Double-coil contact structure of vacuum arc extinguish chamber in mechanical high-voltage direct-current circuit breaker |
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| Country | Link |
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| CN (1) | CN110085475B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999611A (en) * | 2020-08-11 | 2020-11-27 | 南京航空航天大学 | Test device and method for improving breakdown voltage of vacuum arc-extinguishing chamber |
| CN112509858A (en) * | 2020-12-21 | 2021-03-16 | 西安交通大学 | Double-break interlocking quick switch for integrated series compensation current limiting device |
| CN113178352A (en) * | 2021-06-15 | 2021-07-27 | 广东电网有限责任公司广州供电局 | Vacuum arc-extinguishing chamber assembly and contact assembly thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4115672A (en) * | 1976-02-19 | 1978-09-19 | Hazemeijer B. V. | Vacuum switch and electro-magnetic coil assembly therefor |
| JPH02227923A (en) * | 1989-01-12 | 1990-09-11 | Sachsenwerk Ag | Switching contact of vacuum switch |
| CN2733567Y (en) * | 2004-09-04 | 2005-10-12 | 王政 | Bounce-proof longitudinal magnetic contact for vacuum arc extinguish chamber |
| CN103489699A (en) * | 2013-10-12 | 2014-01-01 | 浙江紫光电器有限公司 | High-voltage vacuum extinction chamber |
| CN109308976A (en) * | 2018-11-07 | 2019-02-05 | 平高集团有限公司 | Coil type longitudinal field contact component and vacuum interrupter |
-
2019
- 2019-05-14 CN CN201910398018.4A patent/CN110085475B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4115672A (en) * | 1976-02-19 | 1978-09-19 | Hazemeijer B. V. | Vacuum switch and electro-magnetic coil assembly therefor |
| JPH02227923A (en) * | 1989-01-12 | 1990-09-11 | Sachsenwerk Ag | Switching contact of vacuum switch |
| CN2733567Y (en) * | 2004-09-04 | 2005-10-12 | 王政 | Bounce-proof longitudinal magnetic contact for vacuum arc extinguish chamber |
| CN103489699A (en) * | 2013-10-12 | 2014-01-01 | 浙江紫光电器有限公司 | High-voltage vacuum extinction chamber |
| CN109308976A (en) * | 2018-11-07 | 2019-02-05 | 平高集团有限公司 | Coil type longitudinal field contact component and vacuum interrupter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999611A (en) * | 2020-08-11 | 2020-11-27 | 南京航空航天大学 | Test device and method for improving breakdown voltage of vacuum arc-extinguishing chamber |
| CN111999611B (en) * | 2020-08-11 | 2021-10-15 | 南京航空航天大学 | Test device and method for improving breakdown voltage of vacuum arc-extinguishing chamber |
| CN112509858A (en) * | 2020-12-21 | 2021-03-16 | 西安交通大学 | Double-break interlocking quick switch for integrated series compensation current limiting device |
| CN112509858B (en) * | 2020-12-21 | 2021-10-19 | 西安交通大学 | Double-break interlocking quick switch for integrated series compensation current limiting device |
| CN113178352A (en) * | 2021-06-15 | 2021-07-27 | 广东电网有限责任公司广州供电局 | Vacuum arc-extinguishing chamber assembly and contact assembly thereof |
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| Publication number | Publication date |
|---|---|
| CN110085475B (en) | 2021-04-09 |
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