CN104966633A - Switch assembly - Google Patents
Switch assembly Download PDFInfo
- Publication number
- CN104966633A CN104966633A CN201510260273.4A CN201510260273A CN104966633A CN 104966633 A CN104966633 A CN 104966633A CN 201510260273 A CN201510260273 A CN 201510260273A CN 104966633 A CN104966633 A CN 104966633A
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- CN
- China
- Prior art keywords
- switch
- switch module
- resistance
- thyristor
- electric capacity
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 abstract description 3
- 238000010891 electric arc Methods 0.000 description 14
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000002955 isolation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- 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
- H01H9/42—Impedances connected with contacts
Landscapes
- Electronic Switches (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a switch assembly and belongs to the field of electrical switches. The switch assembly comprises at least two switches connected in series, a capacitor, a first resistor, and a second resistor. The at least two switches connected in series comprise at least one first switch and at least one second switch. The at least one second switch is connected in series. The first resistor and the second resistor are connected in series and then are connected with the at least one second switch in parallel. The capacitor is connected with the second resistor in parallel.
Description
Technical field
The present invention relates to electric switch technical field, particularly a kind of switch module.
Background technology
Electric arc is a kind of gas discharge phenomenon, is the moment spark that electric current is produced by some dielectric (such as air).When using switch to disconnect electric current, if circuit voltage is not less than 10-20 volt, electric current is not less than 80-100 milliampere, just can produce electric arc, thus damage switch contact between the contact of switch.Therefore, the power supply occasion of high voltage, the switch used must be the switch with arc-suppression function.
Existing arc-suppressing switch is primarily of electric capacity and switch composition, and electric capacity and switch in parallel, after switch disconnects, electric capacity starts to charge and reduces the electric current of switch contact, thus plays the effect of arc extinguishing.
But upon opening, the electric capacity in arc-suppressing switch still may form electrical connection to existing arc-suppressing switch, makes electric current continue through, has an impact to load equipment, threaten the safety of Operation and Maintenance personnel simultaneously.
Summary of the invention
In order to the electric capacity solved in prior art in arc-suppressing switch still may form electrical connection, electric current is continued through, load equipment is had an impact, threaten the problem of the safety of Operation and Maintenance personnel simultaneously, embodiments provide a kind of switch module.Described technical scheme is as follows:
Embodiments provide a kind of switch module, described switch module comprises:
At least two switches of connecting, electric capacity, the first resistance and the second resistance, at least two switches of described series connection comprise at least one first switch and at least one second switch, at least one second switch described connects successively, in parallel with at least one second switch described after described first resistance and described second resistant series, described electric capacity and described second resistor coupled in parallel.
In a kind of implementation of the embodiment of the present invention, the resistance of described first resistance is 0.5 ~ 1000 Europe.
In the another kind of implementation of the embodiment of the present invention, the resistance of described second resistance is 10 ~ 5000 kilo-ohms.
In the another kind of implementation of the embodiment of the present invention, described switch module also comprises diode, described diode and described first resistor coupled in parallel, and the negative electrode of described diode connects described electric capacity.
In the another kind of implementation of the embodiment of the present invention, described switch module also comprises thyristor and drive circuit, described in described thyristor is connected between at least two switches and load, and the anode of described thyristor is connected with described at least two switches, described drive circuit is connected respectively with three poles of described thyristor, described drive circuit is for obtaining anode and the cathode voltage of described thyristor, and after the voltage difference between the anode and negative electrode of described thyristor reaches predetermined value setting-up time, gate pole to described thyristor sends drive singal, connect described thyristor.
In the another kind of implementation of the embodiment of the present invention, described drive circuit is processor.
In the another kind of implementation of the embodiment of the present invention, at least one second switch described is located at described between at least one the first switch and described thyristor.
In the another kind of implementation of the embodiment of the present invention, described switch module comprises multiple described first switch and multiple described second switch.
In the another kind of implementation of the embodiment of the present invention, described switch module comprises described first switch and a described second switch.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
Switch during beginning in the first switch and second switch is in normal attracting state; When needs disconnect, first disconnect the contact of the first switch, the first switch is still in conducting state due to arcing; Disconnect the contact of second switch again, when second switch disconnects, because the first resistance, electric capacity assume responsibility for the effect of current channel, current direction first resistance, the electric capacity of the former contact by second switch, eliminate the condition of the contact starting the arc of second switch, the contact of second switch disconnects without electric arc.When capacitor charging after-current reduction to a certain extent, because the electric current on electric capacity can pass through the contact of the first switch, and after this electric current is reduced to tens of milliamperes, the contact electric arc also Lock-out of the first switch, contact disconnects, and now whole switch module completes break function.After whole switch module completes disconnection, the energy that electric capacity is stored is by the second resistance slow releasing.In the above-mentioned course of work, because second switch is not connected into arc extinguishing assembly (electric capacity, the first resistance and the second resistance), therefore after electric current is reduced to tens of milliamperes, electric arc nature extinguishing can disconnect the disconnection completely that can realize load to realize load completely, ensure that the electrical isolation of circuit, the electric capacity avoided in prior art in arc-suppressing switch still may form electrical connection, electric current is made to continue through brought safety problem, this switch module can be applied and the circuit higher to the requirement of electrical isolation degree in addition, and range of application is wider.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit diagram of a kind of switch module that the embodiment of the present invention provides;
Fig. 2 is the circuit diagram of the another kind of switch module that the embodiment of the present invention provides;
Fig. 3 is the circuit diagram of the another kind of switch module that the embodiment of the present invention provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Fig. 1 provides a kind of circuit diagram of switch module, and be applicable to high voltage circuit (as 100-1000 volt), see Fig. 1, this switch module comprises:
At least two switches of connecting, electric capacity C1, the first resistance R1 and the second resistance R2, at least two switches of series connection comprise at least one first K switch 1 and at least one second switch K2, at least one second switch K2 connects successively, first resistance R1 and the second resistance R2 is in parallel with at least one second switch K2 after connecting, and electric capacity C1 is in parallel with the second resistance R2.Wherein, the first K switch 1 and second switch K2 form by some switches, and switch is mechanical switch.
Wherein, electric capacity C1 is the extinguishing arc electric capacity of second switch K2, and the size of its capacity can be selected according to the maximum operating currenbt of circuit; First resistance R1 is current-limiting resistance, and its resistance is less, such as, be 0.5 ~ 1000 ohm; Second resistance R2 is electric capacity bleeder resistance, and the second resistance R2 resistance is comparatively large, such as, be 10 ~ 5000 kilohms, to realize the energy of electric capacity C1 by the second resistance R2 comparatively On The Drug Release.
This switch module operation principle is: during beginning, the first K switch 1 and second switch K2 are in normal attracting state; When needs disconnect, first disconnect the contact of the first K switch 1, the first K switch 1 is still in conducting state due to arcing; Disconnect the contact of second switch K2 again, when second switch K2 disconnects, because the first resistance R1, electric capacity C1 assume responsibility for the effect of current channel, current direction first resistance R1, the electric capacity C1 of the former contact by second switch K2, eliminate the condition of the contact starting the arc of second switch K2, the contact of second switch K2 disconnects without electric arc.Reduce when electric capacity C1 is charged to a certain degree after-current, because the electric current on electric capacity C1 can pass through the contact of the first K switch 1, and after this electric current is reduced to tens of milliamperes, the contact electric arc also Lock-out of the first K switch 1, contact disconnects, and now whole switch module completes break function.After whole switch module completes disconnection, the energy of storage on electric capacity C1 is by the second resistance R2 slow releasing.In the above-mentioned course of work, because second switch K2 is not connected into arc extinguishing assembly (electric capacity C1, the first resistance R1 and the second resistance R2), therefore after electric current is reduced to tens of milliamperes, electric arc nature extinguishing can disconnect the disconnection completely that can realize load to realize load completely, ensure that the electrical isolation of circuit, the electric capacity avoided in prior art in arc-suppressing switch still may form electrical connection, electric current is made to continue through brought safety problem, this switch module can be applied and the circuit higher to the requirement of electrical isolation degree in addition, and range of application is wider.
In the switch module that Fig. 1 provides, this switch module can comprise multiple first K switch 1 and multiple second switch K2.
When this switch module comprises multiple first K switch 1, arc extinguishing assembly is across between multiple tandem tap, this multiple switch is when there being electric arc to occur, negative resistance superposes, present larger negative resistance property, make effective operating voltage of this switch module promote at double thus, improve maximum working voltage and maximum operating currenbt that assembly bears, this switch module is made to have higher reliability, practical value, and more available energy.Switch module comprises multiple second switch K2, further increases the electrical isolation intensity of switch module.
In the switch module that Fig. 1 provides, this switch module also can only include first K switch 1 and a second switch K2.
Fig. 2 provides the circuit diagram of another kind of switch module, and see Fig. 2, compared with the switch module provided with Fig. 1, this switch module also comprises diode D1, and diode D1 is in parallel with the first resistance R1, and the negative electrode of diode D1 connects electric capacity C1.
Diode D1 is in parallel with the first resistance R1, makes electric capacity C1 charging process have lower impedance, is conducive to reducing electric current rapidly, thus reduces the harm of electric arc further, is more conducive to the disappearance of electric arc.
In the switch module course of work, except the loss that electric arc causes, have when contact is connected at every turn and bounce many times, microcosmic is repeatedly connect, this spring adds that the side effect of arc extinguishing assembly can make electric capacity C1 repeated charge, electric capacity C1 discharging current can be large to contact erosion, thus greatly reduce the switch contact life-span.Therefore the embodiment of the present invention also needs to consider from the side effect of contact bounce and arc extinguishing assembly, protects switch.Mainly contain following two aspects:
The first, the first resistance R1 is set.In the contact web current jitter process of second switch K2, the first resistance R1 limits the discharging current of electric capacity C1 by the contact of second switch K2, thus plays protection to contact; But the first resistance R1 resistance is not again too large, can meet normally releasing of electric capacity C1 electric current, for charging is prepared next time, thus can not cause producing electric arc because of current jitter, during contact tripping namely at every turn on microcosmic, all not have electric arc to produce.
The second, thyristor SCR is set, as shown in Figure 3.Fig. 3 provides the circuit diagram of the another kind of switch module of the embodiment of the present invention, the difference of this switch module and Fig. 2 is only, this switch module also comprises thyristor SCR and drive circuit 1, thyristor SCR is connected between at least two switches and load, and the anode of thyristor SCR is connected with at least two switches, drive circuit 1 is connected respectively with three poles of thyristor SCR, drive circuit 1 is for obtaining anode and the cathode voltage of thyristor SCR, and after the voltage difference between the anode and negative electrode of thyristor SCR reaches predetermined value setting-up time, gate pole to thyristor SCR sends drive singal, connect thyristor SCR.Wherein, drive circuit 1 can be processor.Certainly, drive circuit 1 can be also other hardware circuits or integrated circuit, and the present invention does not limit this.
In the switch module that Fig. 3 provides, at least one second switch K2 is located between at least one the first K switch 1 and thyristor SCR.
Certainly, the embodiment of the present invention can also set up thyristor SCR and drive circuit 1 on the basis of Fig. 1, its annexation and principle and Fig. 3 similar, repeat no more here.
Thyristor SCR does not participate in arc extinguishing, and the effect of thyristor SCR solves above-mentioned beating and problem that the side effect of arc extinguishing assembly causes the contact loss of switch to strengthen.Thyristor SCR makes switch connect in no current situation, and after switch connection, thyristor SCR automatic time delay is opened.Particularly, the conducting of thyristor SCR controls power supply and is obtained by the voltage difference of himself negative electrode, anode, and be designed to the pattern of delay and running, namely when voltage difference appears in thyristor SCR two ends, drive circuit starts to obtain power supply, and after delay after a while, drive circuit provides to drive to thyristor SCR and triggers, and connects thyristor SCR.Connect under so just achieving the state that switch module is zero at load current.Beat in the contact of switch module in connection process, but now owing to not having electric current to flow through, so contact metal ablation can not be caused.And when thyristor SCR connects, the contact of whole switch module has been in the stable state connected, harm can not be produced to contact.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a switch module, is characterized in that, described switch module comprises:
At least two switches of connecting, electric capacity, the first resistance and the second resistance, at least two switches of described series connection comprise at least one first switch and at least one second switch, at least one second switch described connects successively, in parallel with at least one second switch described after described first resistance and described second resistant series, described electric capacity and described second resistor coupled in parallel.
2. switch module according to claim 1, is characterized in that, the resistance of described first resistance is 0.5 ~ 1000 Europe.
3. switch module according to claim 1, is characterized in that, the resistance of described second resistance is 10 ~ 5000 kilo-ohms.
4. switch module according to claim 1, is characterized in that, described switch module also comprises diode, described diode and described first resistor coupled in parallel, and the negative electrode of described diode connects described electric capacity.
5. switch module according to claim 1, it is characterized in that, described switch module also comprises thyristor and drive circuit, described in described thyristor is connected between at least two switches and load, and the anode of described thyristor is connected with described at least two switches, described drive circuit is connected respectively with three poles of described thyristor, described drive circuit is for obtaining anode and the cathode voltage of described thyristor, and after the voltage difference between the anode and negative electrode of described thyristor reaches predetermined value setting-up time, gate pole to described thyristor sends drive singal, connect described thyristor.
6. switch module according to claim 5, is characterized in that, described drive circuit is processor.
7. switch module according to claim 5, is characterized in that, at least one second switch described is located at described between at least one the first switch and described thyristor.
8. the switch module according to any one of claim 1-7, is characterized in that, described switch module comprises multiple described first switch and multiple described second switch.
9. the switch module according to any one of claim 1-7, is characterized in that, described switch module comprises described first switch and a described second switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260273.4A CN104966633B (en) | 2015-05-20 | 2015-05-20 | Switch module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510260273.4A CN104966633B (en) | 2015-05-20 | 2015-05-20 | Switch module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104966633A true CN104966633A (en) | 2015-10-07 |
| CN104966633B CN104966633B (en) | 2017-09-19 |
Family
ID=54220658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510260273.4A Active CN104966633B (en) | 2015-05-20 | 2015-05-20 | Switch module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104966633B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1126570A (en) * | 1965-10-30 | 1968-09-05 | Matsushita Electric Works Ltd | Arc-suppressing circuit for switching devices in direct current circuit |
| GB1214682A (en) * | 1967-02-28 | 1970-12-02 | Mitsubishi Electric Corp | Circuits comprising current limiting devices |
| US3670176A (en) * | 1970-04-10 | 1972-06-13 | Werner Faust | Switching arrangement for disconnecting high voltage direct current lines |
| US5083232A (en) * | 1988-10-31 | 1992-01-21 | Asea Brown Boveri Ab | Fault current limiter |
| GB2275367A (en) * | 1993-02-22 | 1994-08-24 | Yang Tai Her | Arc extinguishing circuit |
| CN2852361Y (en) * | 2005-12-10 | 2006-12-27 | 王炎 | Restorable high capacity high-speed switch apparatus |
| CN101430973A (en) * | 2007-11-05 | 2009-05-13 | 河南省新乡市矿山起重机有限公司 | Direct current switch arc suppressor |
| CN101820274A (en) * | 2010-04-20 | 2010-09-01 | 武汉星火投资咨询中心（普通合伙） | Sparkless safety switch, socket and safety power on-off method |
| CN102723700A (en) * | 2012-04-24 | 2012-10-10 | 上海诺雅克电气有限公司 | Direct-current contact switch breaking protective circuit and contactor |
| US20140332500A1 (en) * | 2013-05-07 | 2014-11-13 | Abb S.P.A. | Dc current switching apparatus, electronic device, and method for switching an associated dc circuit |
-
2015
- 2015-05-20 CN CN201510260273.4A patent/CN104966633B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1126570A (en) * | 1965-10-30 | 1968-09-05 | Matsushita Electric Works Ltd | Arc-suppressing circuit for switching devices in direct current circuit |
| GB1214682A (en) * | 1967-02-28 | 1970-12-02 | Mitsubishi Electric Corp | Circuits comprising current limiting devices |
| US3670176A (en) * | 1970-04-10 | 1972-06-13 | Werner Faust | Switching arrangement for disconnecting high voltage direct current lines |
| US5083232A (en) * | 1988-10-31 | 1992-01-21 | Asea Brown Boveri Ab | Fault current limiter |
| GB2275367A (en) * | 1993-02-22 | 1994-08-24 | Yang Tai Her | Arc extinguishing circuit |
| CN2852361Y (en) * | 2005-12-10 | 2006-12-27 | 王炎 | Restorable high capacity high-speed switch apparatus |
| CN101430973A (en) * | 2007-11-05 | 2009-05-13 | 河南省新乡市矿山起重机有限公司 | Direct current switch arc suppressor |
| CN101820274A (en) * | 2010-04-20 | 2010-09-01 | 武汉星火投资咨询中心（普通合伙） | Sparkless safety switch, socket and safety power on-off method |
| CN102723700A (en) * | 2012-04-24 | 2012-10-10 | 上海诺雅克电气有限公司 | Direct-current contact switch breaking protective circuit and contactor |
| US20140332500A1 (en) * | 2013-05-07 | 2014-11-13 | Abb S.P.A. | Dc current switching apparatus, electronic device, and method for switching an associated dc circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104966633B (en) | 2017-09-19 |
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Effective date of registration: 20200721 Address after: 441004 unit 6, unit 1, building 4, Jinxiu Tianchi yulanyuan, high tech Zone, Xiangyang City, Hubei Province Patentee after: Hubei Hongfei Electronic Technology Co., Ltd Address before: 441004, No. 1, Dong Jin Road, Xiangfan Automotive Industry Development Zone, Hubei, China (4 floor of old fire brigade) Co-patentee before: HUBEI YIJIA TECHNOLOGY Co.,Ltd. Patentee before: Wang Yunguo |
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