CN101256907B - No-arc breaking circuit and its method based on variable capacitor - Google Patents
No-arc breaking circuit and its method based on variable capacitor Download PDFInfo
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- CN101256907B CN101256907B CN2008100348353A CN200810034835A CN101256907B CN 101256907 B CN101256907 B CN 101256907B CN 2008100348353 A CN2008100348353 A CN 2008100348353A CN 200810034835 A CN200810034835 A CN 200810034835A CN 101256907 B CN101256907 B CN 101256907B
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000003990 capacitor Substances 0.000 title claims abstract description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
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Abstract
本发明提供一种基于可变电容的无弧分断电路及其方法，包括开关电器的主触点、辅助触点、可变电容、限流电阻，辅助触点、可变电容和限流电阻串联在一起形成辅助通道，辅助通道与主触点并联。开关电器的主触点先断开，使原来被短路的辅助电路接通，此时可变电容处于高容量状态，电容器足以抑制电压在最小起弧电压下，避免主触点断开时起弧，随后可变电容值不断变小，主触点两端接触电压不断上升，在电压达到最小起弧电压之前，主触点完全断开，实现无弧分断，其后直到某一时刻辅助触点断开，电路完全切断。本发明具有结构简单，同时适用于直流电路和交流电路的优点。
The invention provides an arc-free breaking circuit based on a variable capacitor and its method, which includes a main contact, an auxiliary contact, a variable capacitor, and a current-limiting resistor of a switching device, and the auxiliary contacts, the variable capacitor, and the current-limiting resistor are connected in series Together they form an auxiliary channel, which is connected in parallel with the main contacts. The main contact of the switching device is disconnected first, so that the auxiliary circuit that was originally short-circuited is connected. At this time, the variable capacitor is in a high-capacity state, and the capacitor is sufficient to suppress the voltage at the minimum arcing voltage to avoid arcing when the main contact is disconnected. , then the variable capacitance value keeps decreasing, and the contact voltage at both ends of the main contact keeps rising. Before the voltage reaches the minimum arcing voltage, the main contact is completely disconnected to realize arc-free breaking. disconnected, the circuit is completely cut off. The invention has the advantages of simple structure and is applicable to both DC circuits and AC circuits.
Description
Technical field
The present invention relates to the non-arc breaking deenergizing and the method thereof in a kind of Electrical Control Technology field, relate in particular to a kind of non-arc breaking deenergizing and method thereof based on variable capacitance.
Background technology
The work of device for switching is to open or the disjunction operating circuit, the electric arc that when minute deenergizing, produces and extinguish the subject matter that faces when being device for switching work, capacity more then arc extinguishing is more difficult, so extinguish arcs is the center and the key point of device for switching technical problem.Existing device for switching is conceived to " arc extinguishing ", just when device for switching divides deenergizing to produce electric arc, manages to be extinguished.
Existing device for switching especially in the high-voltage great-current field, extensively adopts vacuum or SF in order to eliminate electric arc
6Arc-control device, this type of switch exist all that structure is numerous and jumbled, the shortcoming of maintenance difficult; On the other hand, the breaking capacity of device for switching such as circuit breaker is subjected to the restriction of arc extinguishing ability, switch is threaded off fail, and causes serious economy loss.
Find that through literature search patent (US7053739-B2) discloses a kind of novel non-arc breaking deenergizing and method thereof to prior art.This design adopts the parallel resistance group to come the transferred arc energy, reaches the purpose that fundamentally suppresses electric arc, thereby realizes the effect that non-arc breaking is disconnected, but this this body structure of method more complicated, and arc quenching effect also has limitation.
Summary of the invention
The present invention is directed to the existing in prior technology deficiency, a kind of non-arc breaking deenergizing and method thereof based on variable capacitance is provided, the electric arc that on main contacts and auxiliary contact, produces when making it can eliminate the branch deenergizing, and can safety, the electric arc that produces when effectively suppressing the disjunction of malfunction switch, fundamentally suppress the generation of electric arc, avoid the scaling loss of switch main contacts, reduce maintenance work.The present invention is a kind of non-arc breaking deenergizing and method thereof that can be used for the electric switch of alternative circuit breaker, on-load switch, contactor use.
The present invention is achieved by the following technical solution:
A kind of non-arc breaking deenergizing involved in the present invention based on variable capacitance, the main contacts, auxiliary contact, variable capacitance and the current-limiting resistance that comprise device for switching, auxiliary contact, variable capacitance and the current-limiting resistance formation accessory channel that is cascaded wherein, accessory channel is parallel to the two ends of the main contacts of device for switching.
Described accessory channel number is more than or equal to 1.
Described variable capacitance is used for the transferred arc energy, and main contacts is disconnected under minimum arc voltage.
The action of described auxiliary contact lags behind main contacts.
The resistance of described current-limiting resistance is more than or equal to zero.
The present invention both can be used for the disjunction DC circuit and also can be used for the disjunction alternating current circuit.
The disconnected method of a kind of non-arc breaking involved in the present invention based on variable capacitance, be specially: adopt above-mentioned circuit, the main contacts of device for switching disconnects earlier, made originally and connected by the auxiliary circuit of short circuit, at this moment, variable capacitance is in high-capacity state, capacitor is enough to suppress voltage under minimum arc voltage, the starting the arc when avoiding main contacts to disconnect, and variable capacitance constantly diminishes subsequently, main contacts two ends touch voltage constantly rises, before voltage reached minimum arc voltage, main contacts disconnected fully, realized that non-arc breaking is disconnected, thereafter disconnect up to a certain moment auxiliary contact, circuit cuts off fully.
Beneficial effect of the present invention: owing to adopt the disconnected device of the non-arc breaking of device for switching, switch no longer needs complicated arc-control device on the one hand, eliminates various malfunctions, tripping accident; On the other hand, can significantly reduce pitting of contacts, avoid damming and running accident jointly of switch, therefore can prolong the electrical endurance of switch main contacts system and overhaul life, assurance security appliance; Simultaneously, can also avoid the harm of switching overvoltage or power-frequency overvoltage to electric power system.Do not have numerous and jumbled, the arc-control device of easy care not of structure, help reducing switch volume, reduce operating cost, improve the reliability of electrical equipment.
Description of drawings
Fig. 1 circuit diagram of the present invention
An embodiment of Fig. 2 disjunction 220v of the present invention DC circuit
The voltage waveform of Fig. 3 disjunction 220v of the present invention DC circuit
An embodiment of Fig. 4 disjunction 380v of the present invention alternating current circuit
The voltage waveform of Fig. 5 disjunction 380v of the present invention alternating current circuit
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1.In the present embodiment, auxiliary contact 2, variable capacitance 3 and current-limiting resistance 4 are cascaded, and constitute accessory channel jointly, and then are together in parallel with main contacts 1, constitute complete arc extinguishing assembly, promptly described non-arc breaking deenergizing based on variable capacitance.
Described accessory channel number is more than or equal to 1.
Described variable capacitance 3 is used for the transferred arc energy, and main contacts 1 is disconnected under minimum arc voltage.
The action of described auxiliary contact 2 lags behind main contacts.
The resistance of described current-limiting resistance 4 is more than or equal to zero.
Fig. 2 and Fig. 3 have provided an embodiment of disjunction DC circuit of the present invention.Complete circuit shown in Figure 2 is made of DC power supply 6, load 5 and arc extinguishing assembly shown in Figure 1.Wherein, the voltage of DC power supply 6 is 220V, and load 5 is the resistance of one 10 Ω, variable capacitance 3 peak capacity 15F, current-limiting resistance 0.05 Ω.Fig. 3 has provided the disjunction waveform.Wherein, V
MinBe the minimum arc voltage of slider material, t1 represents to represent 1 opening time of main contacts, t2 2 opening times of auxiliary contact.As shown in Figure 3, the t1-t2 after main contacts 1 disconnects during this period of time in, main contacts 1 two ends touch voltage is in minimum arc voltage V
MinDown, avoided the main contacts starting the arc, thereby realized that non-arc breaking is disconnected.
Fig. 4 and Fig. 5 have provided an alternative embodiment of the invention.Complete circuit shown in Figure 4 is made of DC power supply 7, load 5 and arc extinguishing assembly shown in Figure 1.Wherein, the crest voltage of AC power 7 is 380V, and frequency is 60HZ, and load 5 is the resistance of one 5 Ω, and variable capacitance 3 peak capacities are 20F, and current-limiting resistance 4 is 0.05 Ω.Fig. 5 has provided the disjunction waveform.As shown in Figure 5, the t1-t2 after main contacts 1 disconnects during this period of time in, main contacts 1 two ends touch voltage is in minimum arc voltage V
MinDown, avoided main contacts 1 starting the arc, thereby realized that successfully non-arc breaking is disconnected.
Claims (7)
1. one kind based on the disconnected method of the non-arc breaking of variable capacitance, it is characterized in that: with the auxiliary contact of device for switching, variable capacitance and the current-limiting resistance formation accessory channel that is cascaded, accessory channel is in parallel with main contacts again, the main contacts of device for switching disconnects earlier, made originally and connected by the auxiliary circuit of short circuit, this moment, variable capacitance was in high-capacity state, capacitor is enough to suppress voltage under minimum arc voltage, the starting the arc when avoiding main contacts to disconnect, variable capacitance constantly diminishes subsequently, main contacts two ends touch voltage constantly rises, before voltage reached minimum arc voltage, main contacts disconnected fully, realized that non-arc breaking is disconnected, thereafter disconnect up to a certain moment auxiliary contact, circuit cuts off fully.
2. non-arc breaking deenergizing that realizes the described method of claim 1 based on variable capacitance, the main contacts, auxiliary contact, variable capacitance, the current-limiting resistance that comprise device for switching, it is characterized in that: auxiliary contact, variable capacitance and the current-limiting resistance formation accessory channel that is cascaded, accessory channel is in parallel with main contacts.
3. the non-arc breaking deenergizing based on variable capacitance according to claim 2 is characterized in that: described accessory channel number is more than or equal to 1.
4. the non-arc breaking deenergizing based on variable capacitance according to claim 2 is characterized in that: the resistance of described current-limiting resistance is more than or equal to zero.
5. the non-arc breaking deenergizing based on variable capacitance according to claim 2, it is characterized in that: the action of described auxiliary contact lags behind main contacts.
6. the non-arc breaking deenergizing based on variable capacitance according to claim 2 is characterized in that: described variable capacitance transferred arc energy disconnects main contacts under minimum arc voltage.
7. the non-arc breaking deenergizing based on variable capacitance according to claim 2 is characterized in that: be applicable to disjunction DC circuit and disjunction alternating current circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100348353A CN101256907B (en) | 2008-03-20 | 2008-03-20 | No-arc breaking circuit and its method based on variable capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100348353A CN101256907B (en) | 2008-03-20 | 2008-03-20 | No-arc breaking circuit and its method based on variable capacitor |
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| Publication Number | Publication Date |
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| CN101256907A CN101256907A (en) | 2008-09-03 |
| CN101256907B true CN101256907B (en) | 2010-12-01 |
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| CN2008100348353A Expired - Fee Related CN101256907B (en) | 2008-03-20 | 2008-03-20 | No-arc breaking circuit and its method based on variable capacitor |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863956B (en) * | 2016-11-12 | 2021-04-13 | 广州市金矢电子有限公司 | Dynamic electrode arc-extinguishing device |
| WO2020057551A1 (en) | 2018-09-19 | 2020-03-26 | 郭桥石 | Arc-extinguishing circuit and apparatus |
| CN112753085B (en) * | 2018-10-25 | 2023-07-28 | 广州市金矢电子有限公司 | Arc extinguishing device |
| CN109301804B (en) * | 2018-10-30 | 2019-10-29 | 大连理工大学 | A Variable Impedance Current Limiter Device Based on Repulsion Mechanism |
| CN109193599A (en) * | 2018-11-02 | 2019-01-11 | 李振奎 | A kind of ladder cuts unrestrained arc-suppressing method and extinguisher |
| CN112491013B (en) * | 2020-11-19 | 2023-05-23 | 天津航空机电有限公司 | Manual arc-free breaking circuit applied to high-voltage direct-current breaker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU853688A1 (en) * | 1979-09-21 | 1981-08-07 | Московский Ордена Ленина И Орденатрудового Красного Знамени Институтинженеров Железнодорожного Транспорта | Device for switching heavy-current dc circuits |
-
2008
- 2008-03-20 CN CN2008100348353A patent/CN101256907B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU853688A1 (en) * | 1979-09-21 | 1981-08-07 | Московский Ордена Ленина И Орденатрудового Красного Знамени Институтинженеров Железнодорожного Транспорта | Device for switching heavy-current dc circuits |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2004-111312A 2004.04.08 |
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