CN107342186A - A kind of adjustable rotary magnetic field vacuum interrupter - Google Patents
A kind of adjustable rotary magnetic field vacuum interrupter Download PDFInfo
- Publication number
- CN107342186A CN107342186A CN201710595812.9A CN201710595812A CN107342186A CN 107342186 A CN107342186 A CN 107342186A CN 201710595812 A CN201710595812 A CN 201710595812A CN 107342186 A CN107342186 A CN 107342186A
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- CN
- China
- Prior art keywords
- magnetic field
- generation device
- vacuum interrupter
- rotating magnetic
- amplitude
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention provides a kind of adjustable rotary magnetic field vacuum interrupter, including：A pair of conductive bar, radome, a pair of discs shape contact, insulation crust, generation device of rotating magnetic field and amplitude-frequency adjusting means；The insulation crust is arranged on the outside of the radome；The generation device of rotating magnetic field is fixed on outside the insulation crust, and with the coaxial placement of disc contact；The amplitude-frequency adjusting means is connected with generation device of rotating magnetic field, adjusts magnetic field caused by the generation device of rotating magnetic field；The conducting rod is connected with disc contact；The pair of disc contact is coaxially oppositely arranged in radome.Technical scheme provided by the invention, generation device of rotating magnetic field are totally placed in outside the insulation crust of arc-chutes, avoid the possibility of aerogenesis, and caused transverse magnetic field is focused more between contact i.e. at electric arc, is more beneficial for cut-offfing for contact.
Description
Technical field
The present invention relates to vacuum interrupter, and in particular to a kind of adjustable rotary magnetic field vacuum interrupter.
Background technology
As net capacity constantly expands and the continuous improvement of voltage class, the control of power system and opening for protection
Close equipment and be faced with more acute condition of work and harsher requirement.And vacuum switch using high vacuum as arc extinguishing and
Dielectric, contact is simple with arc quenching system, has class of insulation height, easy to maintain, electric life length, is adapted to frequent operation, body
Product it is small, it is in light weight the advantages that, occupied an leading position in middle pressure field.
And vacuum circuit breaker has four kinds of conventional structure of contact terminals.It is disc flat board dock contact respectively, screw type
Horizontal magnetic contact, coil type indulge magnetic contact, cup-shaped longitudinal field contact.
Wherein disc flat board dock contact is simplest a kind of structure in vacuum interrupter, is only applicable to relatively low
Diffused arc electric current, electric current are generally below 5kA.It is widely used in vacuum interrupter that load current cut-offs and contactor
Vacuum interrupter, maximum drop-out current are 4kA.And when drop-out current is larger, spot will occurs in anode, and vacuum arc will produce
Raw strong shrinkage phenomenon, metal vapors electric arc will be shrinkage type by diffusion-type transition, and then cause failure of interruption.
And screw type transverse magnetic field contact is applied to cut-offfing for high current arc.Such a contact is produced using transverse magnetic field
Electric power high current arc is carried out high speed rotary motion on contact；During beginning, molten metal bridge is broken between contact,
Electric arc is produced, and maintains certain time；Then it is in high speed rotary motion in surrounding of the moment along contact, contact surface produces
Uniformly smaller ablation, heat are dispersed in the surrounding of voltage contact area；Because electric arc is in the feelings of the spontaneous quantity of heat production deficiency of contact
Under condition, plus electric arc constantly high-speed motion, diffused arc is forced to cut-off electric current in current over-zero.
Longitudinal field contact is equally applicable to cut-offfing for high current arc.It is mainly characterized by controlled using longitudinal magnetic field
Vacuum arc processed is uniformly distributed and reduced arc voltage with obtain electric arc, so as to improve its breaking capacity.Longitudinal magnetic field be by
Breaking current flows through contact and produces an axial magnetic field along electric arc arc column direction, is used for stablizing electric arc with this magnetic field, can be from root
Aggregation of the high-current vacuum arc in anode surface is prevented in sheet, so that breaking capacity increases substantially.Longitudinal magnetic field at present
The contact form of structure has become the leading structure of large-current vacuum arc extinguishing chamber contact.
From the foregoing, it will be observed that when using disc flat board dock contact, due to the presence in no horizontal and vertical magnetic field, sun
Spot most probably occurs, electric arc can cause uneven ablation to contact, reduce the electric life of vacuum circuit breaker.Therefore,
This use to disc flat board dock contact causes larger limitation.
The content of the invention
Therefore the defects of due to the electric arc ablation uneven to contact reducing, the electric life of vacuum circuit breaker to overcome,
The present invention provides a kind of adjustable rotary magnetic field vacuum interrupter, including：A pair of conductive bar, radome, a pair of discs shape contact, absolutely
Edge shell, generation device of rotating magnetic field and amplitude-frequency adjusting means；
The insulation crust is arranged on the outside of the radome；
The generation device of rotating magnetic field is fixed on outside the insulation crust, and with the disc contact is coaxial puts
Put；
The amplitude-frequency adjusting means is connected with generation device of rotating magnetic field, is adjusted caused by the generation device of rotating magnetic field
Magnetic field；
The conducting rod is connected with disc contact；
The pair of disc contact is coaxially oppositely arranged in radome.
The generation device of rotating magnetic field is the cylinder type that soft magnetic bodies piece laminates.
Its inner side of the generation device of rotating magnetic field is provided with winding skewed slot.
The winding skewed slot is built-in with coil windings, and the coil windings are connected with amplitude-frequency adjusting means.
The amplitude-frequency adjusting means is connected with three-phase main-frequency alternating current.
The amplitude-frequency adjusting means exports the voltage and frequency to coil windings according to the big minor adjustment of drop-out current, control
The intensity of longitudinal magnetic field caused by the generation device of rotating magnetic field and transverse rotating magnetic field intensity and speed；
The longitudinal magnetic field synthesizes oblique rotating excitation field with transverse rotating magnetic field.
The winding skewed slot number is 6.
The coil windings are Three-phase Single-layer Windings, and winding is symmetrical arranged.
With immediate prior art ratio, technical scheme provided by the invention has the advantages that：
Technical scheme provided by the invention, generation device of rotating magnetic field are totally placed in outside the insulation crust of arc-chutes, are kept away
The possibility of aerogenesis is exempted from, and caused transverse magnetic field is focused more between contact i.e. at electric arc, is more beneficial for cut-offfing for contact；
Technical scheme provided by the invention, the vacuum interrupter are provided with amplitude-frequency adjusting means after logical three-phase alternating current,
According to the size of drop-out current, manual adjustment exports the supply frequency and voltage to winding coil, so that rotating excitation field occurs
Device, which finally produces, to be corresponded under the drop-out current value, constant amplitude, the respective transversal rotating excitation field of rotation speed constant and width
It is worth constant longitudinal magnetic field, the two synthesis is to tilt the oblique rotating excitation field of certain angle.Electric arc is at this in transverse rotation magnetic
In the presence of field and longitudinal magnetic field, high speed rotary motion is done in contact surface, makes contact surface ablation more uniform, so as to subtract
The degree that light contact surface is melted by arc erosion, while medium recovery speed after arc is added, make opening for vacuum circuit breaker
Cutting capacity is improved, and extends the electric life of contact；
Technical scheme provided by the invention, transverse rotating magnetic field and longitudinal magnetic field are by generation device of rotating magnetic field；
Technical scheme provided by the invention, generation device of rotating magnetic field are the cylinder type that soft magnetic bodies piece laminates, and are reduced
Eddy current effect；
Technical scheme provided by the invention, winding skewed slot is provided with the inside of the generation device of rotating magnetic field, can be produced simultaneously
The transverse magnetic field and longitudinal magnetic field of raw rotation.
Brief description of the drawings
Fig. 1 is the overall structure diagram of vacuum interrupter of the present invention.
Fig. 2 is the generation device of rotating magnetic field schematic diagram of vacuum interrupter of the present invention.
Fig. 3 is the generation device of rotating magnetic field fluting overall schematic of vacuum interrupter of the present invention.
Fig. 4 is the generation device of rotating magnetic field fluting elevational sectional view of vacuum interrupter of the present invention.
Fig. 5 is the three-phase windings schematic diagram of vacuum interrupter of the present invention.
Fig. 6 is the rotating transverse magnetic field change procedure schematic diagram of vacuum interrupter of the present invention.
Fig. 7 is that vacuum interrupter of the present invention synthesizes oblique magnetic field schematic diagram.
Reference：1st, conducting rod；2nd, radome；3rd, disc contact；4th, insulation crust；5th, rotating excitation field fills
Put；6th, amplitude-frequency adjusting means；7th, the soft magnetic bodies piece for cylinder type is laminated；8th, coil windings.
Embodiment
Adjustable rotary magnetic field of the present invention vacuum interrupter is carried out specifically with reference to the accompanying drawings and examples
It is bright.
Such as the overall structure diagram that Fig. 1 is vacuum interrupter of the present invention.The present invention includes conducting rod 1, radome
2, disc contact 3, insulation crust 4, generation device of rotating magnetic field 5, amplitude-frequency adjusting means 6；The field generator for magnetic is fixed
Placed outside arc-chutes insulation crust, and with arc-chutes coaxial direction.It is oblique that winding is provided with the generation device of rotating magnetic field
Groove；The skewed slot is built-in with coil windings；The coil windings are connected with amplitude-frequency adjusting means.
Amplitude-frequency adjusting means of the present invention is connected with three-phase main-frequency alternating current, amplitude-frequency adjusting means output end by wire with
The coil windings terminals are corresponding to be connected.Three-phase main-frequency AC rectification is direct current by the amplitude-frequency adjusting means, amplitude-frequency
The controller of adjusting means further according to short circuit current size by DC inverter be relevant voltage and frequency exchange electricity output to
Winding coil, the electric current of winding coil is flowed through as output increases to the voltage of winding coil and increases, produced by controlling
Longitudinal magnetic field intensity and transverse rotating magnetic field intensity and speed, with realize under different drop-out current grades, can make electricity
Ablation of the arc in contact surface is more uniform.
Fig. 2 is the generation device of rotating magnetic field schematic diagram of vacuum interrupter of the present invention.The rotating excitation field fills
Put including laminating soft magnetic bodies piece 7 and coil windings 8 for cylinder type.As a kind of preferred scheme, the present invention is in the cylinder interior
A skewed slot is provided with every 60 °, is altogether 6.
The soft magnetic bodies piece 7 can use iron Co-based alloy piece.
Fig. 3 and Fig. 4 is that the generation device of rotating magnetic field of vacuum interrupter of the present invention slots overall schematic with facing
Direction sectional view.The generation device of rotating magnetic field uses soft magnetic bodies piece, laminates as cylinder type, the influence being vortexed with reduction.
Skewed slot is provided with inside field generator for magnetic, while transverse rotating magnetic field is produced, can also to produce longitudinal magnetic field.As one
Kind preferred scheme, the soft magnetic bodies piece use iron Co-based alloy piece, and the skewed slot angle beta of the skewed slot is 7 ° 37 '.
Fig. 5 is the three-phase windings schematic diagram of vacuum interrupter of the present invention.Coil windings of the present invention use three-phase
Single-layer Windings, winding are symmetrical arranged.Two straight line portions of the coil windings by skewed slot the oblique angle of requirement.It is described
Winding coil uses mica flat type copper wire, and turn-to-turn insulation is the flat bag of mica paper tape, and two noses in coiling in coil add every circle
Poly- phthalimide film is wrapped, is damaged with making up the caused turn-to-turn insulation in forming process.
Fig. 6 is the rotating transverse magnetic field change procedure schematic diagram of vacuum interrupter of the present invention.When the amplitude-frequency is adjusted
When device is connected with three-phase main-frequency electricity, three-phase main-frequency electricity is powered by the amplitude-frequency adjusting means for coil windings, now rotary magnetic
Field generating means can be equal to the stator of motor.When the voltage and frequency of the output of amplitude-frequency adjusting means are fixed value, going out
Parallel to the direction of contact surface in arc chamber, the simultaneously additional fixed-size longitudinal magnetic field of the field generator for magnetic and
Size and the fixed transverse magnetic field of rotary speed.The wave amplitude track of the transverse rotating magnetic field is a circle.The transverse rotation magnetic
Field rotates with the change of current phase in coil windings.When six/a cycle of curent change in the coil windings
When, the transverse rotating magnetic field has turned clockwise 60 °.
Amplitude-frequency adjusting means of the present invention, according to the size of drop-out current, can manually be adjusted after logical three-phase alternating current
Section output is to the supply frequency and voltage for stating winding coil, so that the generation device of rotating magnetic field finally produces correspondingly
Under the drop-out current value, constant amplitude, the respective transversal rotating excitation field of rotation speed constant and the longitudinal magnetic field of constant amplitude.
In the presence of transverse rotating magnetic field and longitudinal magnetic field, electric arc both rotated along contact tangential direction, footpath of the and can along contact
To moving laterally.Therefore, ablation of the electric arc for contact surface is more uniform, extends the electric life of contact.While by
In the high speed rotary motion of electric arc, the diffusion of arc energy is accelerated, medium recovery speed after arc is added, makes vacuum circuit breaker
Connecting-disconnecting function be improved.
Fig. 7 is that vacuum interrupter of the present invention synthesizes oblique magnetic field schematic diagram.The field generator for magnetic can produce simultaneously
Raw fixed-size a longitudinal magnetic field and size and the fixed transverse magnetic field of rotary speed, synthesis both this are an inclination
The oblique rotating excitation field of certain angle, in figureIt is shown.X-Y plane overlaps with contact surface in figure, origin of coordinates O and contact
The surface center of circle overlaps, and Z axis is vertical with contact surface.Longitudinal magnetic field and transverse rotating magnetic field as caused by the field generator for magnetic
The oblique rotating excitation field of synthesis keeps certain angle θ with X-Y plane, and rotates about the z axis.The angular velocity omega of rotation is the winding
π times of the 2 of institute's galvanization frequency in coil, resultant magnetic field amplitude pass directly proportional to the alive amplitude of institute in the winding coil
System.And when drop-out current value changes, the amplitude-frequency adjusting means can be according to the size of required drop-out current and described
Field generator for magnetic is actually needed, and changes voltage and frequency of the output to the winding coil, and then big to produced magnetic field
It is small to be adjusted with speed, to reach under corresponding different drop-out current sizes, magnetic field caused by the field generator for magnetic
Make ablation of the electric arc to contact surface more uniform, improve connecting-disconnecting function.
Finally it should be noted that：Above example is merely to illustrate technical scheme rather than to its protection domain
Limitation, although the application is described in detail with reference to above-described embodiment, those of ordinary skill in the art should
Understand：Those skilled in the art read the embodiment of application can be still carried out after the application a variety of changes, modification or
Person's equivalent substitution, but these changes, modification or equivalent substitution, are applying within pending claims.
Claims (8)
1. a kind of adjustable rotary magnetic field vacuum interrupter, it is characterised in that the vacuum interrupter includes：A pair of conductive bar, screen
Cover cover, a pair of discs shape contact, insulation crust, generation device of rotating magnetic field and amplitude-frequency adjusting means；
The insulation crust is arranged on the outside of the radome；
The generation device of rotating magnetic field is fixed on outside the insulation crust, and with the coaxial placement of disc contact；
The amplitude-frequency adjusting means is connected with generation device of rotating magnetic field, adjusts magnetic caused by the generation device of rotating magnetic field
；
The conducting rod is connected with disc contact；
The pair of disc contact is coaxially oppositely arranged in radome.
2. adjustable rotary magnetic field as claimed in claim 1 vacuum interrupter, it is characterised in that the generation device of rotating magnetic field
The cylinder type laminated for soft magnetic bodies piece.
3. adjustable rotary magnetic field as claimed in claim 1 vacuum interrupter, it is characterised in that the generation device of rotating magnetic field
Inner side is provided with winding skewed slot.
4. adjustable rotary magnetic field as claimed in claim 3 vacuum interrupter, it is characterised in that wired built in the winding skewed slot
Winding is enclosed, the coil windings are connected with amplitude-frequency adjusting means.
5. adjustable rotary magnetic field as claimed in claim 1 vacuum interrupter, it is characterised in that the amplitude-frequency adjusting means is connected with
Three-phase main-frequency alternating current.
6. adjustable rotary magnetic field as claimed in claim 1 vacuum interrupter, it is characterised in that the amplitude-frequency adjusting means according to
The big minor adjustment of drop-out current exports the voltage and frequency to coil windings, controls and is indulged caused by the generation device of rotating magnetic field
Intensity and transverse rotating magnetic field intensity and speed to magnetic field；
The longitudinal magnetic field synthesizes oblique rotating excitation field with transverse rotating magnetic field.
7. adjustable rotary magnetic field as claimed in claim 3 vacuum interrupter, it is characterised in that the winding skewed slot number is 6.
8. adjustable rotary magnetic field as claimed in claim 4 vacuum interrupter, it is characterised in that the coil windings are three-phase list
Layer winding, winding are symmetrical arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710595812.9A CN107342186B (en) | 2017-07-20 | 2017-07-20 | Adjustable rotating magnetic field vacuum arc-extinguishing chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710595812.9A CN107342186B (en) | 2017-07-20 | 2017-07-20 | Adjustable rotating magnetic field vacuum arc-extinguishing chamber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107342186A true CN107342186A (en) | 2017-11-10 |
| CN107342186B CN107342186B (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710595812.9A Active CN107342186B (en) | 2017-07-20 | 2017-07-20 | Adjustable rotating magnetic field vacuum arc-extinguishing chamber |
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| Country | Link |
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| CN (1) | CN107342186B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108447748A (en) * | 2018-03-23 | 2018-08-24 | 西安交通大学 | It is a kind of to use the vacuum interrupter for applying rotating excitation field outside and its cut-off direct methods |
| CN109935480A (en) * | 2019-04-29 | 2019-06-25 | 惠安耐亚节能科技有限公司 | A kind of contact arc extinguishing device of breaker |
| CN112582205A (en) * | 2020-12-27 | 2021-03-30 | 中国振华电子集团宇光电工有限公司（国营第七七一厂） | Reinforcing rib capable of enhancing switching-on and switching-off magnetic field |
| CN113471012A (en) * | 2021-07-20 | 2021-10-01 | 四川大学 | Vacuum arc extinguish chamber |
| CN114345545A (en) * | 2021-12-09 | 2022-04-15 | 大连交通大学 | Magnetic particle dynamic magnetophoresis separation device and method based on rotating magnetic field |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87102582A (en) * | 1986-04-05 | 1987-10-14 | 株式会社明电舍 | Vacuum interrupter |
| CN2298598Y (en) * | 1997-01-17 | 1998-11-25 | 西安交通大学 | Vacuum arc-chutes magnetic screening can |
| US20020036184A1 (en) * | 2000-09-27 | 2002-03-28 | Sohn Jong Mahn | Circuit breaker having hybrid arc extinguishing function |
| CN2857211Y (en) * | 2005-12-09 | 2007-01-10 | 王季梅 | Drop-out device for large capacity vacuum short-circuit current |
| CN105513884A (en) * | 2014-10-14 | 2016-04-20 | 杨永清 | Manufacturing method of vacuum arc extinguishing chamber especially for direct-current switch electric appliance |
-
2017
- 2017-07-20 CN CN201710595812.9A patent/CN107342186B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87102582A (en) * | 1986-04-05 | 1987-10-14 | 株式会社明电舍 | Vacuum interrupter |
| CN2298598Y (en) * | 1997-01-17 | 1998-11-25 | 西安交通大学 | Vacuum arc-chutes magnetic screening can |
| US20020036184A1 (en) * | 2000-09-27 | 2002-03-28 | Sohn Jong Mahn | Circuit breaker having hybrid arc extinguishing function |
| CN2857211Y (en) * | 2005-12-09 | 2007-01-10 | 王季梅 | Drop-out device for large capacity vacuum short-circuit current |
| CN105513884A (en) * | 2014-10-14 | 2016-04-20 | 杨永清 | Manufacturing method of vacuum arc extinguishing chamber especially for direct-current switch electric appliance |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108447748A (en) * | 2018-03-23 | 2018-08-24 | 西安交通大学 | It is a kind of to use the vacuum interrupter for applying rotating excitation field outside and its cut-off direct methods |
| CN109935480A (en) * | 2019-04-29 | 2019-06-25 | 惠安耐亚节能科技有限公司 | A kind of contact arc extinguishing device of breaker |
| CN112582205A (en) * | 2020-12-27 | 2021-03-30 | 中国振华电子集团宇光电工有限公司（国营第七七一厂） | Reinforcing rib capable of enhancing switching-on and switching-off magnetic field |
| CN113471012A (en) * | 2021-07-20 | 2021-10-01 | 四川大学 | Vacuum arc extinguish chamber |
| CN114345545A (en) * | 2021-12-09 | 2022-04-15 | 大连交通大学 | Magnetic particle dynamic magnetophoresis separation device and method based on rotating magnetic field |
| CN114345545B (en) * | 2021-12-09 | 2024-03-12 | 大连交通大学 | Magnetic particle dynamic magnetophoresis separation device and method based on rotating magnetic field |
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| Publication number | Publication date |
|---|---|
| CN107342186B (en) | 2021-04-16 |
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