CN101895028A - Anti-direct current arc discharge circuit - Google Patents
Anti-direct current arc discharge circuit Download PDFInfo
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- CN101895028A CN101895028A CN2010101896598A CN201010189659A CN101895028A CN 101895028 A CN101895028 A CN 101895028A CN 2010101896598 A CN2010101896598 A CN 2010101896598A CN 201010189659 A CN201010189659 A CN 201010189659A CN 101895028 A CN101895028 A CN 101895028A
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- contact
- connector
- direct current
- arc discharge
- discharge circuit
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Abstract
The invention discloses an anti-direct current arc discharge circuit which comprises a connector contact (1), a main contact point (2) and an auxiliary contact point (3), wherein the main contact point (2) and the auxiliary contact point (3) are connected through a capacitive absorption circuit. The auxiliary contact point (3) is arranged in the position which can be contacted before the connector contact (1) is in contact with the main contact point (2). The capacitive absorption circuit comprises a capacitor (5) and a resistor (7). The anti-direct current arc discharge circuit has the advantages of simple structure, convenient use, few circuit links and low cost.
Description
Technical field
The present invention relates to a kind of anti-direct current arc discharge circuit.
Background technology
When two contact charged separation of connector, as long as voltage is greater than 10～20V in the circuit.Electric current is greater than 80～100mA.Between dynamic and static contact just electric arc may appear.Though this moment, contact separated, but electric current continues circulation by the electric arc between contact.
The generating period variation in time of the current instantaneous value of alternating current, therefore at the zero crossing of electric current, electric current becomes 0, and electric arc can disappear automatically.But therefore direct current, after electric arc produces, is difficult to extinguishing arc because there is not current zero-crossing point; Until two contacts of connector are separated into enough distances, electric arc could disappear automatically.
Electric arc is the free gas of high temperature high conductivity, and it not only has very big destruction to contact, may the person or the equipment of its periphery be caused serious injury simultaneously, even causes serious disaster such as fire.
Most solar grid-connected inverter in actual applications, general DC input voitage is all greatly between 100～1000V, electric current, voltage are all much larger than the generation condition of electric arc.During the installation of combining inverter, operation, maintenance, may need band to carry and cut off a direct current, therefore, must increase a dc switch at the direct current input side of combining inverter with band year switching capability.
Because the particularity of direct current arc extinguishing, the switch of direct current is very expensive in the market, and the dc switch of a 20A/1000VDC is greatly about about 1000 yuans.
Summary of the invention
The objective of the invention is: a kind of anti-direct current arc discharge circuit is provided, and it is simple in structure, and is easy to use, and the circuit link is few, and cost is low.
The technical scheme of circuit of the present invention is: a kind of anti-direct current arc discharge circuit, and it comprises connector contact, main contacts, auxiliary contact, the capacitive absorption circuit that passes through between described main contacts and the auxiliary contact connects.
Described auxiliary contact are arranged at connector contact and contact with main contacts on the position that must touch before.
Described capacitive absorbs circuit and includes electric capacity.
Described capacitive absorbs circuit and includes resistance.
Traditional connector is the form of two contacts, and this programme is by auxiliary contact of increase, and corresponding capacitive absorbs circuit, the realization extinguishing arc.Its key is: in the time of two contact separation of connector, the electric current of connector forwards the auxiliary current path of capacitive to, and the node of guaranteeing connector is in the moment that disconnects, and the condition that electric current and voltage all produce less than electric arc realizes extinguishing arc; And, when auxiliary contact separate, there is not electric current to exist yet, therefore, can not produce electric arc yet.
Advantage of the present invention is: implementation method of the present invention is simple, and the circuit link is few, and cost is low.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is application schematic diagram of the present invention (having represented structure of the present invention in the empty frame);
Fig. 2 is the voltage that flows through when unpluging connector on the connector, the working waveform figure of electric current.
Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 are connector of the present invention operation principle key diagram in the process that disconnects.
Wherein: 1 contact; 2 main contactss; 3 auxiliary contact; 5 electric capacity; 6 load RL; 7 resistance; Voltage waveform between 10 major-minor contacts; Current waveform on 11 connectors; The current waveform of 12 load RL.
Embodiment
Embodiment:
As shown in Figure 1, a kind of anti-direct current arc discharge circuit, it comprises connector contact 1, main contacts 2, auxiliary contact 3, the capacitive absorption circuit that passes through between described main contacts 2 and the auxiliary contact 3 connects.Auxiliary contact 3 be arranged at connector contact 1 before contacting with main contacts 2 must position contacting on.Capacitive absorbs circuit and includes electric capacity 5, resistance 7.
Traditional connector is the form of two contacts, and this programme is by auxiliary contact 3 of increase, and corresponding capacitive absorbs circuit, the realization extinguishing arc.Its key is: when the contact 1 of connector separates with main contacts 2, the electric current of connector forwards capacitive to and absorbs circuit (auxiliary current path), the node of guaranteeing connector is in the moment that disconnects, and the condition that electric current and voltage all produce less than electric arc realizes extinguishing arc; And, when separating, there is not electric current to exist with auxiliary contact 3 yet, therefore, can not produce electric arc yet.
Fig. 2 is the voltage that flows through when unpluging connector on the connector, the working waveform figure of electric current.When the contact 1 that unplugs connector leaves main contacts 2, the voltage of connector rises to peak value VCC according to certain slope, the electric current of connector absorbs circuit (RC subsidiary loop) by capacitive and drops to zero gradually, and this moment, contact 1 did not also separate with auxiliary contact 3.
Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 are connector operation principle key diagram in the process that disconnects, and solid arrow is the contact moving direction, and current direction is shown in dotted arrow.
As shown in Figure 3: during circuit turn-on, the current direction that flows through connector is shown in dotted arrow;
As shown in Figure 4: when unpluging connector, when the head end of connector contact 1 separates with main contacts 2, the electric current of connector forwards capacitive to and absorbs circuit (RC auxiliary current path), this moment, current direction was shown in the dotted arrow among the figure, guarantee the head end of connector contact 1 and the moment that main contacts 2 disconnects, the condition that electric current and voltage all produce less than electric arc, and then the arcing problem when realizing preventing to turn-off;
As shown in Figure 5: in unpluging the process of connector, the head end of connector contact 1 is not also with before auxiliary contact 3 separate, electric capacity 5 make the electric current that absorbs circuit (RC auxiliary current path) by capacitive drop to zero gradually every straight function, prepare for the zero current of realizing contact 1 and auxiliary contact 3 disconnects;
As shown in Figure 6: when the head end of connector contact 1 was about to separate with auxiliary contact 3, the head end and the electric current between the auxiliary contact 3 that flow through contact 1 had reduced to zero, so connector the arcing phenomenon can not occur again;
As shown in Figure 7: after the head end of connector contact 1 leaves auxiliary contact 3, arrive initial bit, form certain physical with auxiliary contact 3 and isolate.
Should be pointed out that for the present invention also to have the embodiment of multiple conversion and remodeling, be not limited to the specific embodiment of above-mentioned execution mode through proving absolutely.The foregoing description is as just explanation of the present invention, rather than restriction.In a word, protection scope of the present invention should comprise those conspicuous to those skilled in the art conversion or substitute and remodeling.
Claims (4)
1. anti-direct current arc discharge circuit, it is characterized in that: it comprises connector contact (1), main contacts (2), auxiliary contact (3), the capacitive of passing through between described main contacts (2) and the auxiliary contact (3) absorbs circuit and connects.
2. anti-direct current arc discharge circuit according to claim 1 is characterized in that: described auxiliary contact (3) are arranged at connector contact (1) and contact with main contacts (2) on the position that must touch before.
3. anti-direct current arc discharge circuit according to claim 1 is characterized in that: described capacitive absorbs circuit and includes electric capacity (5).
4. anti-direct current arc discharge circuit according to claim 1 is characterized in that: described capacitive absorbs circuit and includes resistance (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101896598A CN101895028A (en) | 2010-06-02 | 2010-06-02 | Anti-direct current arc discharge circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101896598A CN101895028A (en) | 2010-06-02 | 2010-06-02 | Anti-direct current arc discharge circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101895028A true CN101895028A (en) | 2010-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101896598A Pending CN101895028A (en) | 2010-06-02 | 2010-06-02 | Anti-direct current arc discharge circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN101895028A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158032A (en) * | 2014-08-27 | 2014-11-19 | 国家电网公司 | Arc-suppression type plug and socket |
| CN105355482A (en) * | 2015-12-10 | 2016-02-24 | 江苏兆伏新能源有限公司 | DC arc-extinguishing circuit |
| CN105551856A (en) * | 2015-12-10 | 2016-05-04 | 江苏兆伏新能源有限公司 | Direct-current arc suppression circuit |
| CN107394761A (en) * | 2017-07-01 | 2017-11-24 | 合肥东玖电气有限公司 | A kind of direct current extinguishing arc and overvoltage protection system |
| CN107824566A (en) * | 2017-12-02 | 2018-03-23 | 蚌埠依爱电子科技有限责任公司 | Three-dimensional culture waterline automatic backflushing device and its control method are controlled based on PLC |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004111312A (en) * | 2002-09-20 | 2004-04-08 | Honda Motor Co Ltd | Circuit breaker |
| CN2622828Y (en) * | 2003-06-12 | 2004-06-30 | 上海科特高分子材料有限公司 | Arcless reversing service of switch plant |
| CN2785111Y (en) * | 2005-05-09 | 2006-05-31 | 福州大学 | Zero pressure continuous limit stream eliminating arc appliance equipment |
| CN201805036U (en) * | 2010-06-02 | 2011-04-20 | 江苏艾索新能源股份有限公司 | Circuit preventing direct current arc discharge |
-
2010
- 2010-06-02 CN CN2010101896598A patent/CN101895028A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004111312A (en) * | 2002-09-20 | 2004-04-08 | Honda Motor Co Ltd | Circuit breaker |
| CN2622828Y (en) * | 2003-06-12 | 2004-06-30 | 上海科特高分子材料有限公司 | Arcless reversing service of switch plant |
| CN2785111Y (en) * | 2005-05-09 | 2006-05-31 | 福州大学 | Zero pressure continuous limit stream eliminating arc appliance equipment |
| CN201805036U (en) * | 2010-06-02 | 2011-04-20 | 江苏艾索新能源股份有限公司 | Circuit preventing direct current arc discharge |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158032A (en) * | 2014-08-27 | 2014-11-19 | 国家电网公司 | Arc-suppression type plug and socket |
| CN104158032B (en) * | 2014-08-27 | 2016-07-20 | 国家电网公司 | Extinguishing arc type adapter |
| CN105355482A (en) * | 2015-12-10 | 2016-02-24 | 江苏兆伏新能源有限公司 | DC arc-extinguishing circuit |
| CN105551856A (en) * | 2015-12-10 | 2016-05-04 | 江苏兆伏新能源有限公司 | Direct-current arc suppression circuit |
| CN107394761A (en) * | 2017-07-01 | 2017-11-24 | 合肥东玖电气有限公司 | A kind of direct current extinguishing arc and overvoltage protection system |
| CN107824566A (en) * | 2017-12-02 | 2018-03-23 | 蚌埠依爱电子科技有限责任公司 | Three-dimensional culture waterline automatic backflushing device and its control method are controlled based on PLC |
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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: 20101124 |