CN103326328B - Comprise arc-control device and the arc-suppressing method of gate-controlled switch - Google Patents
Comprise arc-control device and the arc-suppressing method of gate-controlled switch Download PDFInfo
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- CN103326328B CN103326328B CN201310203149.5A CN201310203149A CN103326328B CN 103326328 B CN103326328 B CN 103326328B CN 201310203149 A CN201310203149 A CN 201310203149A CN 103326328 B CN103326328 B CN 103326328B
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Abstract
The present invention provides a kind of arc-control device comprising gate-controlled switch and arc-suppressing method, and described arc-control device includes absorbing circuit, gate-controlled switch and direct current mechanical switch；Described direct current mechanical switch is arranged on direct current supply line, and described absorbing circuit is installed in parallel the two ends of described direct current mechanical switch；Described gate-controlled switch is connected between described direct current mechanical switch and described absorbing circuit；Described absorbing circuit is RC circuit in parallel。Absorbing circuit is parallel to the two ends of customary DC mechanical switch, and control its sequential by gate-controlled switch, to absorb the energy produced when direct current machinery switches off, it is possible to avoid the phenomenon of arc discharge that direct current mechanical switch occurs in disconnection process, thus extending the service life of direct current mechanical switch。
Description
Technical field
The present invention relates to a kind of arc-control device, be specifically related to a kind of arc-control device comprising gate-controlled switch and arc-suppressing method。
Background technology
DC source, for instance accumulator, is widely used in the every field of people's productive life, for powering for various instruments, instrument and luminaire even load。
In the direct current supply line that DC source and load form, mechanical switch is generally adopted to control the break-make of supply line。But, mechanical switch is in the process disconnected, and due to the existence of electric current, switch contact often produces arc light when separating, thus reducing the service life of mechanical switch；Further, when arc light is serious, switch contact, even breaking out of fire can directly be burnt。Therefore, in order to reduce arc light phenomenon, improving the service life of dc switch, in prior art, people need to use specialty dc switch, but, specialty dc switch has expensive and that volume is bigger shortcoming, thus the popularizing of inconvenient specialty dc switch。
Summary of the invention
For the defect that prior art exists, the present invention provides a kind of arc-control device comprising gate-controlled switch and arc-suppressing method, absorbing circuit is parallel to the two ends of customary DC mechanical switch, and control its sequential by gate-controlled switch, to absorb the energy produced when direct current machinery switches off, the phenomenon of arc discharge that direct current mechanical switch occurs in disconnection process can be avoided, thus extending the service life of direct current mechanical switch。
The technical solution adopted in the present invention is as follows:
The present invention provides a kind of arc-control device comprising gate-controlled switch, and described arc-control device includes absorbing circuit, gate-controlled switch and direct current mechanical switch；Described direct current mechanical switch is arranged on direct current supply line, and described absorbing circuit is installed in parallel the two ends of described direct current mechanical switch；Described gate-controlled switch is connected between described direct current mechanical switch and described absorbing circuit；Described absorbing circuit is RC circuit in parallel。
Preferably, described direct current mechanical switch is arranged on the positive line side of described direct current supply line。
Preferably, described direct current mechanical switch is arranged on the negative wire side of described direct current supply line。
Preferably, described direct current mechanical switch includes the first direct current mechanical switch and the second direct current mechanical switch；Described first direct current mechanical switch is arranged on the positive line side of described direct current supply line, and described second direct current mechanical switch is arranged on the negative wire side of described direct current supply line；Described gate-controlled switch includes the first gate-controlled switch and the second gate-controlled switch；Described absorbing circuit includes the first absorbing circuit and the second absorbing circuit；
Described first absorbing circuit is installed in parallel the two ends of described first direct current mechanical switch；Described first gate-controlled switch is connected between described first direct current mechanical switch and described first absorbing circuit；
Described second absorbing circuit is installed in parallel the two ends of described second direct current mechanical switch；Described second gate-controlled switch is connected between described second direct current mechanical switch and described second absorbing circuit。
The present invention also provides for a kind of arc-suppressing method based on the arc-control device comprising gate-controlled switch, comprises the following steps:
S1, when described direct current mechanical switch is off, controlling described gate-controlled switch is one-way conduction state, and in described RC circuit, the voltage of electric capacity C is direct current supply voltage；Wherein, described one-way conduction state is direct current machinery when switching off, by the direction that absorbing circuit is charged by the DC current of direct current mechanical switch；
In S2, the t1 moment, described direct current mechanical switch closes；After Guan Bi, the voltage of electric capacity C is gradually used up by resistance R, and when reaching t2 moment, the voltage of electric capacity C reduces to 0, and now, controlling described gate-controlled switch is two-way admittance state；
In S3, the t3 moment, described direct current mechanical switch begins breaking, and in the process that described direct current machinery switches off, described direct current mechanical switch produces energy, and this energy is absorbed by electric capacity C, and the moment complete for this energy absorption is t4 by electric capacity C；In the t4 moment, controlling described gate-controlled switch is one-way conduction state, and described direct current mechanical switch is the off-state described in S1。
Preferably, the delay time lag between t1 moment and t2 moment be 500 nanosecond～60 seconds。
Preferably, the delay time lag between t3 moment and t4 moment be 500 nanosecond～60 seconds。
Beneficial effects of the present invention is as follows:
The present invention provides a kind of arc-control device comprising gate-controlled switch and arc-suppressing method, this arc-control device is parallel to the two ends of customary DC mechanical switch, and control its sequential by gate-controlled switch, can effectively absorb the energy produced when direct current machinery switches off, avoid the phenomenon of arc discharge that direct current mechanical switch occurs in disconnection process, thus extending the service life of direct current mechanical switch。And, the arc-control device of this direct current mechanical switch also has the advantage that volume is little and cost is low, conveniently popularizes。
Accompanying drawing explanation
The direct current mechanical switch that Fig. 1 provides for the embodiment of the present invention is at a kind of circuit diagram of positive line side；
The direct current mechanical switch that Fig. 2 provides for the embodiment of the present invention is at the another kind of circuit diagram of positive line side；
The direct current mechanical switch that Fig. 3 provides for the embodiment of the present invention a kind of circuit diagram in negative wire side；
The direct current mechanical switch that Fig. 4 provides for the embodiment of the present invention another kind of circuit diagram in negative wire side；
The direct current mechanical switch that Fig. 5 provides for the embodiment of the present invention a kind of circuit diagram when positive and negative line side respectively。
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is illustrated。
The present invention provides a kind of arc-control device comprising gate-controlled switch, and described arc-control device includes absorbing circuit, gate-controlled switch and direct current mechanical switch；Described direct current mechanical switch is arranged on direct current supply line, and described absorbing circuit is installed in parallel the two ends of described direct current mechanical switch；Described gate-controlled switch is connected between described direct current mechanical switch and described absorbing circuit；Described absorbing circuit is RC circuit in parallel。Gate-controlled switch is the switch that can control one-way conduction or two-way admittance, such as, unidirectional or the two-way admittance state of controlled metal-oxide-semiconductor or insulated gate bipolar transistor IGBT is controlled by control circuit, then namely control circuit and controlled metal-oxide-semiconductor form a kind of gate-controlled switch, or control circuit and insulated gate bipolar transistor IGBT also form a kind of gate-controlled switch。
For Fig. 1, during application said apparatus arc extinguishing, concrete arc-suppressing method comprises the following steps:
S1, when described direct current mechanical switch is off, controlling described gate-controlled switch is one-way conduction state, and in described RC circuit, the voltage of electric capacity C is direct current supply voltage；Wherein, described one-way conduction state is direct current machinery when switching off, by the direction that absorbing circuit is charged by the DC current of direct current mechanical switch；
In S2, the t1 moment, described direct current mechanical switch closes；After Guan Bi, the voltage of electric capacity C is gradually used up by resistance R, and when reaching t2 moment, the voltage of electric capacity C reduces to 0, and now, controlling described gate-controlled switch is two-way admittance state；
In this step, between the t1-t2 moment, it is necessary to making gate-controlled switch is one-way conduction state, such guarantee electric capacity C passes through resistance R release voltage, thus preparing for absorbing the energy produced when direct current machinery switches off in electric capacity C subsequent step。If between the t1-t2 moment, gate-controlled switch is two-way admittance state, then can cause electric capacity directly to direct current mechanical switch release voltage, thus direct current mechanical switch can be caused damage。In practical application, it is generally the case that the delay time lag between t1 moment and t2 moment be 500 nanosecond～60 seconds, it is ensured that the voltage of electric capacity C reduces to 0。
In S3, the t3 moment, described direct current mechanical switch begins breaking, and in the process that described direct current machinery switches off, described direct current mechanical switch produces energy, and this energy is absorbed by electric capacity C, and the moment complete for this energy absorption is t4 by electric capacity C；In the t4 moment, controlling described gate-controlled switch is one-way conduction state, and described direct current mechanical switch is the off-state described in S1。
Between the t3 moment in moment-t4, gate-controlled switch is two-way admittance state such that it is able to makes electric capacity C absorb the energy that direct current mechanical switch produces more fully, reaches the purpose of arc extinguishing。In practical application, it is generally the case that the delay time lag between t3 moment and t4 moment be 500 nanosecond～60 seconds, it is ensured that electric capacity C fully absorbs the energy that direct current mechanical switch produces because of disconnection。
Therefore, in the present invention, absorbing circuit is parallel to the two ends of customary DC mechanical switch, and control its sequential by gate-controlled switch, to absorb the energy produced when direct current machinery switches off, can effectively absorb the energy produced when direct current machinery switches off, it is to avoid the phenomenon of arc discharge that direct current mechanical switch occurs in disconnection process。In the present invention, direct current mechanical switch may be mounted at positive line side or the negative wire side of direct current supply line or is simultaneously attached to positive line side or negative wire side, for direct current mechanical switch installation site, the particular circuit configurations of several arc-control device is set forth below。
Embodiment one: direct current mechanical switch is arranged on the positive line side of direct current supply line
As it is shown in figure 1, be a kind of circuit diagram, wherein, K represents direct current mechanical switch, and RC in parallel forms absorbing circuit；Switch K2 and control circuit collectively constitute gate-controlled switch, are controlled K2 one-way conduction or two-way admittance state by control circuit。In Fig. 1, gate-controlled switch one-way conduction state is: the one-way conduction state of from 1 to 2。
As in figure 2 it is shown, be another kind of circuit diagram, itself and Fig. 1 are distinctive in that, gate-controlled switch installation site is slightly distinguished, and gate-controlled switch one-way conduction state is still: the one-way conduction state of from 1 to 2。
Embodiment two: direct current mechanical switch is arranged on the negative wire side of direct current supply line
Fig. 3 and Fig. 4 is the circuit diagram that two kinds of direct current mechanical switchs are arranged on negative wire side。Each symbology implication is identical with embodiment one, does not repeat them here。
Embodiment three: direct current mechanical switch is separately mounted to positive line side and the negative wire side of direct current supply line
Concrete, as it is shown in figure 5, direct current mechanical switch includes the first direct current mechanical switch K1 and the second direct current mechanical switch K3；First direct current mechanical switch K1 is arranged on the positive line side of direct current supply line, and the second direct current mechanical switch K3 is arranged on the negative wire side of direct current supply line。
At two ends parallel connection absorbing circuit 1 and the gate-controlled switch 1 of the first direct current mechanical switch K1, at two ends parallel connection absorbing circuit 2 and the gate-controlled switch 2 of the second direct current mechanical switch K3。Wherein, absorbing circuit 1 is identical with Fig. 1 or Fig. 2 with the mounting means of gate-controlled switch 1, and absorbing circuit 2 is identical with Fig. 3 or Fig. 4 with the mounting means of gate-controlled switch 2, no longer describes in detail at this。
Finally, it is emphasized that, in the present invention, the gate-controlled switch occurred in each step is that one-way conduction state is following state: when direct current machinery switches off, by the direction that absorbing circuit is charged by the DC current of direct current mechanical switch。
In sum, the present invention provides a kind of arc-control device comprising gate-controlled switch and arc-suppressing method, this arc-control device is parallel to the two ends of customary DC mechanical switch, and control its sequential by gate-controlled switch, can effectively absorb the energy produced when direct current machinery switches off, it is to avoid the phenomenon of arc discharge that direct current mechanical switch occurs in disconnection process, thus extending the service life of direct current mechanical switch。And, the arc-control device of this direct current mechanical switch also has the advantage that volume is little and cost is low, conveniently popularizes。
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications also should look protection scope of the present invention。
Claims (1)
1. the arc-suppressing method based on the arc-control device comprising gate-controlled switch, it is characterised in that be applied in the arc-control device comprising gate-controlled switch；The described arc-control device comprising gate-controlled switch includes absorbing circuit, gate-controlled switch and direct current mechanical switch；Described direct current mechanical switch is arranged on direct current supply line, and described absorbing circuit is installed in parallel the two ends of described direct current mechanical switch；Described gate-controlled switch is connected between described direct current mechanical switch and described absorbing circuit；Described absorbing circuit is RC circuit in parallel；
Described arc-suppressing method comprises the following steps:
S1, when described direct current mechanical switch is off, controlling described gate-controlled switch is one-way conduction state, and in described RC circuit, the voltage of electric capacity C is direct current supply voltage；Wherein, described one-way conduction state is direct current machinery when switching off, by the direction that absorbing circuit is charged by the DC current of direct current mechanical switch；
In S2, the t1 moment, described direct current mechanical switch closes；After Guan Bi, the voltage of electric capacity C is gradually used up by resistance R, and when reaching t2 moment, the voltage of electric capacity C reduces to 0, and now, controlling described gate-controlled switch is two-way admittance state；
In S3, the t3 moment, described direct current mechanical switch begins breaking, and in the process that described direct current machinery switches off, described direct current mechanical switch produces energy, and this energy is absorbed by electric capacity C, and the moment complete for this energy absorption is t4 by electric capacity C；In the t4 moment, controlling described gate-controlled switch is one-way conduction state, and described direct current mechanical switch is the off-state described in S1；
Wherein, the delay time lag between t1 moment and t2 moment be 500 nanosecond～60 seconds；
Delay time lag between t3 moment and t4 moment be 500 nanosecond～60 seconds；
Described direct current mechanical switch includes the first direct current mechanical switch and the second direct current mechanical switch；Described first direct current mechanical switch is arranged on the positive line side of described direct current supply line, and described second direct current mechanical switch is arranged on the negative wire side of described direct current supply line；
Described gate-controlled switch includes the first gate-controlled switch and the second gate-controlled switch；
Described absorbing circuit includes the first absorbing circuit and the second absorbing circuit；Described first absorbing circuit is installed in parallel the two ends of described first direct current mechanical switch；Described first gate-controlled switch is connected between described first direct current mechanical switch and described first absorbing circuit；
Described second absorbing circuit is installed in parallel the two ends of described second direct current mechanical switch；Described second gate-controlled switch is connected between described second direct current mechanical switch and described second absorbing circuit。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310203149.5A CN103326328B (en) | 2013-05-28 | 2013-05-28 | Comprise arc-control device and the arc-suppressing method of gate-controlled switch |
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| CN201310203149.5A CN103326328B (en) | 2013-05-28 | 2013-05-28 | Comprise arc-control device and the arc-suppressing method of gate-controlled switch |
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| CN103326328A CN103326328A (en) | 2013-09-25 |
| CN103326328B true CN103326328B (en) | 2016-06-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109193599A (en) * | 2018-11-02 | 2019-01-11 | 李振奎 | A kind of ladder cuts unrestrained arc-suppressing method and extinguisher |
| CN110970961B (en) * | 2018-12-06 | 2021-06-08 | 宁德时代新能源科技股份有限公司 | Power consumption protection circuit |
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| 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 |
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Address after: 100095 floor No. 1, courtyard No. 33, purple Bird Road, Haidian District, Beijing City, -1 to 5 floor 101 Patentee after: Beijing linkage Tianyi Polytron Technologies Inc Address before: 100044 Beijing city Haidian District Road No. 5 Building 2 401 P.Tricuspidata Patentee before: Beijing Liandong Tianyi Technology Co., Ltd. |