CN103971964A - Arc extinguishing circuit of direct-current contactor - Google Patents
Arc extinguishing circuit of direct-current contactor Download PDFInfo
- Publication number
- CN103971964A CN103971964A CN201310029117.8A CN201310029117A CN103971964A CN 103971964 A CN103971964 A CN 103971964A CN 201310029117 A CN201310029117 A CN 201310029117A CN 103971964 A CN103971964 A CN 103971964A
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- China
- Prior art keywords
- contactor
- switch
- circuit
- arc extinguishing
- control circuit
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Abstract
An arc extinguishing circuit of a direct-current contactor comprises an arc extinguishing loop and a control circuit. The arc extinguishing loop is formed by connecting an audion with a voltage dependent resistor in parallel and then connecting the audion and the voltage dependent resistor with an auxiliary switch in series and is installed at the turn-on end and the turn-off end of a contactor master switch in parallel. The control circuit drives the audion, the auxiliary switch and the contactor master switch to work. The arc extinguishing circuit eliminates discharge sparks caused when the contactor master switch is operated thoroughly, enables the electrical life of the direct-current large-current contactor to be prolonged greatly, and enables electromagnetic interference to be reduced greatly.
Description
Technical field
The invention belongs to contactor protective circuit, relate to direct current machinery contacts of contactor arc-suppression circuit.
Background technology
Contactor is of a great variety, when the contactless contactor of contact-carrying, all can produce electric spark, and surrounding environment is caused to electromagnetic interference, and contacts of contactor is caused to calcination and damage, has a strong impact on the electrical endurance of contactor.High power DC Mechanical Contact device is especially true, the high power DC Mechanical Contact device electrical endurance of a lot of occasions is not and one of the percentage of mechanical endurance, therefore high power DC Mechanical Contact device often adopts various arc extinguishing technology, the most advanced, effect is best is that vacuum adds magnetic blow-out technical scheme, but also just alleviate contacts of contactor sparking problem, fundamentally do not addressed this problem.
Summary of the invention
The invention provides a kind of arc-suppression circuit of thorough solution D.C. contactor switch sparking.
The technical solution adopted in the present invention is:
A kind of D.C. contactor arc-suppression circuit comprises: blow-out circuit and control circuit.Described blow-out circuit includes a triode in parallel and piezo-resistance, is composed in series with an auxiliary switch, is installed in parallel the switch ends at contactor main switch.D.C. contactor switching signal is accepted and carried out to described control circuit, for triode, auxiliary switch, contactor main switch provide driving signal, completes contactless contactor action.
Arc-suppression circuit of the present invention is in the time of contactor off-state, auxiliary switch, triode, contactor main switch, all in off-state, when control circuit is received close commands, first drive closed auxiliary switch, drive again triode conducting, more closed contactor main switch; When control circuit is received ON-and OFF-command, first drive and disconnect contactor main switch, then drive triode to close, then disconnect auxiliary switch.
Be not very high occasion to switch leakage current requirement, auxiliary switch can direct short-circuit.
Visible, sparking voltage when arc-suppression circuit of the present invention makes the action of contactor main switch only has the forward conduction voltage drop of a triode, the discharge spark having caused while thoroughly having eliminated the action of contactor main switch, lengthens the electrical endurance of D.C. high-current contactor greatly, and electromagnetic interference declines greatly.This arc-control device simultaneously, volume is little, production technology is simple, be particularly suitable for batch production.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Brief description of the drawings
Fig. 1 is an embodiment of a kind of D.C. contactor arc-suppression circuit provided by the invention.
Embodiment
With reference to figure 1, the embodiment of the present invention includes blow-out circuit 2 and control circuit 3.Described blow-out circuit 2 comprises that triode 22 is in parallel with piezo-resistance 23, is then composed in series with auxiliary selenoid switch 21, and receives the switch ends of contactor main switch 1; Control circuit 3 is accepted contactless contactor order KC, drives triode 22, contactor main switch 1 and auxiliary selenoid switch 21 to work, and completes contactless contactor action.
The major loop of the embodiment of the present invention is from A+ to A-, in the time that contactor main switch 1 and auxiliary selenoid switch 21 all disconnect, it is off-state, now control circuit 3 is received the close commands of KC, first drive closed auxiliary selenoid switch 21, and drive triode 22 conductings simultaneously, after the complete closure of auxiliary selenoid switch 21, control circuit 3 drives closed contactor main switch 1, and major loop A+ is to the complete conducting of A-; Now control circuit 3 is received the ON-and OFF-command of KC, first control circuit 3 drives and disconnects contactor main switch 1, and after contactor main switch 1 disconnects completely, control circuit 3 drives triode 22 to disconnect, drive and disconnect auxiliary selenoid switch 21 simultaneously, major loop A+ disconnects completely to A-.
Certainly,, in the occasion not high to switch leakage current requirement, auxiliary selenoid switch 21 can be by short circuit.
Preferably, for high-power direct current contactor, above-mentioned triode 22 adopts IGBT series pliotron.
Claims (4)
1. a D.C. contactor arc-suppression circuit, comprise blow-out circuit and control circuit, it is characterized in that: described blow-out circuit has a triode in parallel and piezo-resistance, is composed in series with an auxiliary switch, is installed in parallel the switch ends at contactor main switch.
2. a kind of D.C. contactor arc-suppression circuit according to claim 1, it is characterized in that: D.C. contactor switching signal is accepted and carried out to described control circuit, for triode, auxiliary switch, contactor main switch provide driving signal, complete contactless contactor action.
3. a kind of D.C. contactor arc-suppression circuit according to claim 1, is characterized in that: described auxiliary switch can be by short circuit.
4. a kind of D.C. contactor arc-suppression circuit according to claim 1, is characterized in that: described triode preferentially adopts IBGT series pliotron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310029117.8A CN103971964A (en) | 2013-01-25 | 2013-01-25 | Arc extinguishing circuit of direct-current contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310029117.8A CN103971964A (en) | 2013-01-25 | 2013-01-25 | Arc extinguishing circuit of direct-current contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103971964A true CN103971964A (en) | 2014-08-06 |
Family
ID=51241337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310029117.8A Pending CN103971964A (en) | 2013-01-25 | 2013-01-25 | Arc extinguishing circuit of direct-current contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103971964A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935441A (en) * | 2017-04-28 | 2017-07-07 | 成都雅骏新能源汽车科技股份有限公司 | A kind of ac contactor control circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87211980U (en) * | 1987-08-17 | 1988-08-17 | 湖北省鄂州市精华电器厂 | Contact arc srppressing device of a low-voltage switch |
| US20100007997A1 (en) * | 2008-07-11 | 2010-01-14 | Goodwell Electric Corp. | Electronic arc extinguishing device |
| CN201465837U (en) * | 2009-06-17 | 2010-05-12 | 沈永年 | Switch arc-suppressing circuit |
| CN201845710U (en) * | 2010-05-29 | 2011-05-25 | 刘爱民 | Arc extinguishing circuit of AC relay |
| CN203150430U (en) * | 2013-01-25 | 2013-08-21 | 刘爱民 | DC contactor arc extinguishing circuit |
-
2013
- 2013-01-25 CN CN201310029117.8A patent/CN103971964A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87211980U (en) * | 1987-08-17 | 1988-08-17 | 湖北省鄂州市精华电器厂 | Contact arc srppressing device of a low-voltage switch |
| US20100007997A1 (en) * | 2008-07-11 | 2010-01-14 | Goodwell Electric Corp. | Electronic arc extinguishing device |
| CN201465837U (en) * | 2009-06-17 | 2010-05-12 | 沈永年 | Switch arc-suppressing circuit |
| CN201845710U (en) * | 2010-05-29 | 2011-05-25 | 刘爱民 | Arc extinguishing circuit of AC relay |
| CN203150430U (en) * | 2013-01-25 | 2013-08-21 | 刘爱民 | DC contactor arc extinguishing circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935441A (en) * | 2017-04-28 | 2017-07-07 | 成都雅骏新能源汽车科技股份有限公司 | A kind of ac contactor control circuit |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140806 |