CN102130494A - Failure guiding safety principle-based contactor automatic switching control method - Google Patents
Failure guiding safety principle-based contactor automatic switching control method Download PDFInfo
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- CN102130494A CN102130494A CN2010105319354A CN201010531935A CN102130494A CN 102130494 A CN102130494 A CN 102130494A CN 2010105319354 A CN2010105319354 A CN 2010105319354A CN 201010531935 A CN201010531935 A CN 201010531935A CN 102130494 A CN102130494 A CN 102130494A
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Abstract
The invention discloses a failure guiding safety principle-based contactor automatic switching control method. Contactors are connected in series into a main circuit and a standby circuit respectively, and a control circuit is separated from a driving circuit. When the control circuit transmits a signal to the driving circuit, the driving circuit releases a corresponding contactor; and the driving circuit forms interlocking between two contactor driving circuits by adopting diodes and triodes, and when the two contactors do not receive a releasing signal, only a current contactor is kept in an off state, and the other contactor is not switched off. By the method, the separation of a high voltage circuit from a low voltage circuit and the separation of a device with long service life from a quick-wearing device are realized, electromagnetic interference between the high voltage circuit and the low voltage circuit and between the device with the long service life and the quick-wearing device is reduced, potential safety hazards of the circuits are reduced, and simultaneously, maintaining cost and maintaining difficulties are reduced. When a control board fails, a power supply system can maintain an original power supply state, and the software upgrading of the control board may not cause the interrupt of power supply, so higher power supply reliability is achieved.
Description
Technical field
The invention belongs to the industrial electric field, be specifically related to a kind of contactor control method for automatically switching based on the fault-safety principle principle.
Background technology
General important equipment all has been provided with one main one and has been equipped with two power supply power supplies, just often by the higher main power source power supply of reliability, during the main power source dead electricity, main power switch disconnects, Backup Power Switch drops into, and adopts the stand-by power supply power supply, guarantees that with this power devices do not interrupt.
Owing to,, damage electric power system with the appearance that prevents two-way power supply circulation so the two-way power supply can not be closed simultaneously for the two-way power supply of power devices may exist phase place and voltage difference.And double switch simultaneously opening time long more, the equipment dead electricity time is also long more, even causes the equipment can't operate as normal, this requires double switch short as far as possible change-over time again.
For preventing that manual misoperation from causing the electric power system fault, simultaneously for shortening the switching time of powering as far as possible, increasing active and standby switching power supply circuits begin to adopt the automatic switchover control mode to control, contactor is as a kind of important control apparatus, be used as a kind of automatic switchover control device and used on a large scale, conventional application principle as shown in Figure 1.It is separated into two boards spare with control circuit and drive circuit contactor is controlled, and drive circuit is given tacit consent to two contactors and all is in release condition when not receiving control signal.The shortcoming of its existence is:
(1) plate fault in control circuit place may cause device looses power, does not have control signal this moment and sends, and drive circuit can make two contactors of power supply all discharge, and finally causes device looses power.Cause the fault extension, do not meet the fault-safety principle principle;
(2) the control plate can't be implemented in the sequence of threads upgrading.The control plate often adopts the programmable, intelligent device to control at present, and often there is upgrade requirement in programming device, but need restart after the software upgrading, the intelligence plate can't send the control signal of contactor adhesive when restarting, to cause contactor to get loose, equipment input power down can't realize online software upgrade.
Summary of the invention
At above problem, the purpose of this invention is to provide a kind of contactor control method for automatically switching based on the fault-safety principle principle, can make electric power system keep former power supply state during control plate fault, and can realize online upgrading, the reliability of assurance system power supply.
The objective of the invention is to realize by the following method:
A kind of contactor control method for automatically switching based on the fault-safety principle principle, described contactor is series in the master and stand-by circuits respectively, its control circuit separates with drive circuit, and when described control circuit sent signal to drive circuit, described drive circuit discharged corresponding contactor; Drive circuit adopts diode to cooperate triode to form interlocking between two contactor drive circuits, when two contactors all do not obtain release signal, only keeps current contactor attracting state, and the another contactor can adhesive.
The method of the invention adopts control circuit to separate with drive circuit, realize that on the one hand hi-lo circuit separates, high value on the other hand, long-life device and rapid wear device isolation, reduce mutual electromagnetic interference, when reducing circuit safety hidden danger, reduced maintenance cost and maintenance difficulty; Electric power system can be kept former power supply state during control plate fault, power failure can not occur during the software upgrading of control plate, has higher power supply reliability.
Description of drawings
With embodiment the present invention is described in further detail with reference to the accompanying drawings below.
Fig. 1 is the conventional electric power system structural principle schematic diagram that adopts;
Fig. 2 is the contactor drive circuit structure chart that adopts control method for automatically switching of the present invention;
Embodiment
Specific embodiment of the present invention, it is based on electric power system structure shown in Figure 1, contactor KM1, KM2 is series in the master and stand-by circuits respectively, its control circuit separates with drive circuit, and when described control circuit sent signal to drive circuit, described drive circuit discharged corresponding contactor; The concrete contactor drive circuit structure chart that adopts as shown in Figure 2.
Among the figure, K5, K6 are respectively contactor KM1, the control relay of KM2, and when the K5 adhesive, K1A is communicated with K1B, and contactor KM1 is adhesive, and when the K6 adhesive, K2A is communicated with K2B, and contactor KM2 is adhesive.CJ1, CJ2 are the control signal input port, are that control contactor discharges during 1, the 2 pin conducting of its inside, and 1,2 pin is the control contactor adhesive when disconnecting.
This circuit operational process is as follows:
When control circuit control contactor KM1 adhesive, when KM2 disconnected, 1,2 pin that should control CJ1 disconnected, and 1,2 pin of CJ2 is communicated with.Q3 conducting this moment, Q4 turn-offs, the K5 adhesive, K6 disconnects, contactor KM1 adhesive, KM2 disconnects.
In like manner, if control circuit control contactor KM2 adhesive, when KM1 disconnected, 1,2 pin that should control CJ2 disconnected, and 1,2 pin of CJ1 is communicated with.Q4 conducting this moment, Q3 turn-offs, the K6 adhesive, K5 disconnects, contactor KM2 adhesive, KM1 disconnects.
If occur the control circuit fault during contactor KM1 adhesive, two control pin CJ1, CJ2 is off-state simultaneously.Because Q3 conducting this moment, Q3 collector electrode level is a low level, will force the CTRL1 signal is dragged down by the D12 diode, causes the Q4 can not conducting.Can guarantee to keep this moment KM1 and continue attracting state, and KM2 can not adhesive.
In like manner, the control circuit fault appears during as if contactor KM2 adhesive, two control pin CJ1, and CJ2 is off-state simultaneously.Because Q4 conducting this moment, Q4 collector electrode level is a low level, will force the CTRL2 signal is dragged down by the D14 diode, causes the Q3 can not conducting.Can guarantee to keep this moment KM2 and continue attracting state, and KM1 can not adhesive.
If need software upgrading to restart, and can't guarantee CJ1 in the software restarting process, when which kind of state 2 pin be in, only need earlier CJ1,2 control lines disconnect (CJ1,2 voltages are 12V, can realize safe disconnection), and contactor can remain in original state automatically.Treating that software upgrading is restarted takes back control line after finishing again, can realize the software online updating simultaneously electric power system do not cut off the power supply.
Claims (2)
1. contactor control method for automatically switching based on the fault-safety principle principle, described contactor is series in the master and stand-by circuits respectively, its control circuit separates with drive circuit, it is characterized in that: when described control circuit sent signal to drive circuit, described drive circuit discharged corresponding contactor; Drive circuit adopts electrical interlocks, when two contactors all do not obtain release signal, only keeps current contactor attracting state, and the another contactor can adhesive.
2. the contactor control method for automatically switching based on the fault-safety principle principle according to claim 1 is characterized in that, adopts diode to cooperate triode to form interlocking between two contactor drive circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010531935.4A CN102130494B (en) | 2010-11-04 | 2010-11-04 | Failure guiding safety principle-based contactor automatic switching control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010531935.4A CN102130494B (en) | 2010-11-04 | 2010-11-04 | Failure guiding safety principle-based contactor automatic switching control method |
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| CN102130494A true CN102130494A (en) | 2011-07-20 |
| CN102130494B CN102130494B (en) | 2014-06-11 |
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| CN201010531935.4A Active CN102130494B (en) | 2010-11-04 | 2010-11-04 | Failure guiding safety principle-based contactor automatic switching control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368630A (en) * | 2011-09-21 | 2012-03-07 | 漳州科华技术有限责任公司 | Seamless and circulation-less switching system for two groups of DC (direct current) power supplies |
| CN105846491A (en) * | 2016-03-29 | 2016-08-10 | 特变电工南京智能电气有限公司 | Electric vehicle double-gun direct current charging pile bus switch dual-interlocking module |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201478875U (en) * | 2009-08-25 | 2010-05-19 | 苏州柳溪机电工程有限公司 | Double-power automatic conversion cabinet |
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2010
- 2010-11-04 CN CN201010531935.4A patent/CN102130494B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201478875U (en) * | 2009-08-25 | 2010-05-19 | 苏州柳溪机电工程有限公司 | Double-power automatic conversion cabinet |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368630A (en) * | 2011-09-21 | 2012-03-07 | 漳州科华技术有限责任公司 | Seamless and circulation-less switching system for two groups of DC (direct current) power supplies |
| CN102368630B (en) * | 2011-09-21 | 2013-09-25 | 漳州科华技术有限责任公司 | Seamless and circulation-less switching system for two groups of DC (direct current) power supplies |
| CN105846491A (en) * | 2016-03-29 | 2016-08-10 | 特变电工南京智能电气有限公司 | Electric vehicle double-gun direct current charging pile bus switch dual-interlocking module |
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| Publication number | Publication date |
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| CN102130494B (en) | 2014-06-11 |
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Address after: 100070, No. 3, No. seven, No. 188, South Fourth Ring Road, Fengtai District, Beijing Patentee after: Beijing Dinghan Technology Group Co., Ltd. Address before: 100070, No. 3, No. seven, No. 188, South Fourth Ring Road, Fengtai District, Beijing Patentee before: Beijing Dinghan Technology Co., Ltd. |
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