CN104377661B - Low-voltage protection circuit of urban rail vehicle direct-current power source - Google Patents
Low-voltage protection circuit of urban rail vehicle direct-current power source Download PDFInfo
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- CN104377661B CN104377661B CN201410642188.XA CN201410642188A CN104377661B CN 104377661 B CN104377661 B CN 104377661B CN 201410642188 A CN201410642188 A CN 201410642188A CN 104377661 B CN104377661 B CN 104377661B
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Abstract
The invention provides a low-voltage protection circuit of an urban rail vehicle direct-current power source. The anode of a storage battery is connected to one end of a turnoff button through a reverse current protection diode D3, and the other end of the turnoff button is connected to the positive terminal of a turnoff keeping contactor coil. The positive terminal of the turnoff keeping contactor coil is further connected to the cathode of the reverse current protection diode D3, the negative terminal of the turnoff keeping contactor coil is connected to the cathode of the storage battery, one end of a turnoff keeping contactor normally open contact is connected to the anode of the storage battery, and the other end of the turnoff keeping contactor normally open contact is connected to a load through a reverse current protection diode D2. A low-voltage protection relay coil is connected with the turnoff keeping contactor coil in parallel, and a low-voltage protection relay normally open contact is connected between the cathode of the reverse current protection diode D3 and the positive terminal of the turnoff keeping contactor coil and the positive terminal of the low-voltage protection relay coil in series. When the voltage of the storage battery is lower than a set value of a low-voltage protection relay, the turnoff button is pressed, the low-voltage protection relay coil is not powered on, and low-voltage protection is achieved for the storage battery.
Description
Technical field
The present invention relates to a kind of city rail vehicle dc source low-voltage protection circuit, belongs to city rail vehicle manufacturing technology field.
Background technology
In railcar, DC110V power supplys are powered to almost all of vehicle electric control device, the work of the power supply
State whether safety and stability, directly determines that can railcar normally run.The railcar DC110V of prior art powers,
By the way of the two electric power storage group parallel connections for mainly being arranged on head car and trailer, by arranging diode in batteries anode
To prevent the generation of adverse current.Though this scheme is capable of achieving to power the DC110V of railcar, in some extreme environments,
Such as battery long-time heavy-current discharge, or lay up for a long time, occurring deficient electrical phenomena after battery self discharge, power supply lacks
Weary low-voltage variation, can cause serious infringement to battery.
The content of the invention
The purpose of the present invention is exactly the deficiency for overcoming above-mentioned prior art, there is provided a kind of city rail vehicle dc source low pressure is protected
Protection circuit.
The object of the present invention is achieved like this：A kind of city rail vehicle dc source low-voltage protection circuit, including battery
Group, reverse current protection diode D3, close push button and cut-off push button, the positive pole of batteries are connected to by reverse current protection diode D3
Close push button and the respective one end of cut-off push button, the another of close push button are connected to the anode that closure keeps contactor coil, close
The negative electrode for keeping contactor coil anode to be also connected to reverse current protection diode D3 is closed, closure keeps contactor coil negative terminal to be connected to storage
The negative electrode of battery pack, closure keep an end of contactor normally opened contact to be connected to the anode of batteries, and the other end is protected by adverse current
Shield diode D2 is connected to load, and the another of cut-off push button is connected to the anode for disconnecting contactor coil, disconnects contactor coil
Negative terminal is connected to the negative terminal of batteries, and the negative electrode and closure for disconnecting contactor normally-closed contact concatenation reverse current protection diode D3 keeps
Between contactor coil anode, it is characterised in that low-voltage variation relay coil keeps contactor coil in parallel with closure, low pressure
Protective relay normally opened contact is serially connected in negative electrode and the closure holding of reverse current protection diode D3 with contactor normally-closed contact is disconnected
Between the anode of contactor coil and low-voltage variation relay coil.
Technical scheme, in generation battery long-time heavy-current discharge, or is laid up, battery for a long time
After self discharge, when voltage is less than low-voltage variation relay setting voltage, although press close push button, but low-voltage variation relay
Coil does not go up electricity, so as to its normally opened contact is not also closed, realizes the low-voltage variation to battery.
Description of the drawings
City rail vehicle dc source low-voltage protection circuit principle schematics of the Fig. 1 for the embodiment of the present invention.
Specific embodiment
For making purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Referring to accompanying drawing, the city rail vehicle dc source low-voltage protection circuit of the present embodiment, the positive pole of batteries BAT pass through
Reverse current protection diode D3 is connected to close push button BATCB and the respective one end of cut-off push button BATOB, and close push button BATCB's is another
One end is connected to the anode that closure keeps contactor BQC coils, and closure keeps contactor BQC coils anode to be also connected to reverse current protection two
The negative electrode of pole pipe D3, closure keep contactor BQC coil negative terminals to be connected to the negative electrode of batteries BAT, and closure keeps contactor BQC
One end of normally opened contact is connected to the anode of batteries BAT, and the other end is connected to load by reverse current protection diode D2, and disconnection is pressed
The another of button BATOB is connected to the anode for disconnecting contactor OBATR coils, and the negative terminal for disconnecting contactor OBATR coils is connected to storage
The negative terminal of battery pack BAT, the negative electrode and closure holding for disconnecting contactor OBATR normally-closed contacts concatenation reverse current protection diode D3 connect
Between tentaculum BQC coil anodes, low-voltage variation relay coil VLR keeps contactor BQC coils from parallel connection of coils, low-voltage variation with closure
Relay VLR normally opened contacts are serially connected in negative electrode and the closure of reverse current protection diode D3 with contactor OBATR normally-closed contacts are disconnected
Keep between contactor BQC coils and the anode of low-voltage variation relay coil VLR.
Battery circuit is closed
Battery close push button BATCB → by the train-line through full car is pressed, closure in A cars and B cars keeps connecing
Tentaculum BQC, low-voltage variation relay VLR obtain electric adhesive → by the closure of low-voltage variation relay VLR normally opened contacts (k1, k2)
Realize that circuit keeps → unclamp battery to close button BATCB, closure keeps contactor BQC still to keep attracting state, and it is right to realize
External loading is powered.
Battery circuit disconnects
Press battery cut-off push button BATOB → by through full car train-line, the disconnection relay in A cars and B cars
BATOR obtains the normally-closed contact (b1, b2) of electric adhesive → battery cutoff relay BATOR and goes off state → storage by closure
Battery contactor BQC, storage battery low-voltage protective relay VLR dead electricity disconnection → batteries are not powered to external loading.
Storage battery low-voltage is protected
Low-voltage variation relay VLR setting valves are taken for 77V.When accumulator battery voltage is less than setting valve 77V, even if pressing
Battery close push button BATCB, relay LVR can not be closed because voltage is less than repoussage definite value, so, batteries BAT electricity
Road can not be closed.Equally, if during the use of batteries BAT, causing electricity because long-time high current works
When pressure is drastically decreased below setting valve, low-voltage variation relay VLR actions, its normally opened contact (k1, k2) disconnect → closure guarantor
Hold contactor BQC dead electricity disconnection → batteries not power external loading, play the low-voltage variation to battery and act on.
Finally it should be noted that：Above example only to illustrate technical scheme, rather than a limitation；Although
With reference to the foregoing embodiments the present invention has been described in detail, it will be understood by those within the art that：Which still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (1)
1. a kind of city rail vehicle dc source low-voltage protection circuit, including batteries, reverse current protection diode D3, close push button
And cut-off push button, the positive pole of batteries is connected to close push button and cut-off push button respective by reverse current protection diode D3
End, the another of close push button are connected to the anode that closure keeps contactor coil, and closure keeps contactor coil anode to be also connected to
The negative electrode of reverse current protection diode D3, closure keep contactor coil negative terminal to be connected to the negative electrode of batteries, and closure keeps contact
One end of device normally opened contact is connected to the anode of batteries, and the other end is connected to load by reverse current protection diode D2, and disconnection is pressed
The another of button is connected to the anode for disconnecting contactor coil, and the negative terminal for disconnecting contactor coil is connected to the negative terminal of batteries, breaks
The negative electrode and closure for opening contactor normally-closed contact concatenation reverse current protection diode D3 is kept between contactor coil anode, its feature
It is that low-voltage variation relay coil is in parallel with closure holding contactor coil, low-voltage variation relay normally open contact is connect with disconnection
Tentaculum normally-closed contact is serially connected in the negative electrode of reverse current protection diode D3 and closure keeps contactor coil and low-voltage variation relay
Between the anode of coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410642188.XA CN104377661B (en) | 2014-11-14 | 2014-11-14 | Low-voltage protection circuit of urban rail vehicle direct-current power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410642188.XA CN104377661B (en) | 2014-11-14 | 2014-11-14 | Low-voltage protection circuit of urban rail vehicle direct-current power source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104377661A CN104377661A (en) | 2015-02-25 |
| CN104377661B true CN104377661B (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410642188.XA Active CN104377661B (en) | 2014-11-14 | 2014-11-14 | Low-voltage protection circuit of urban rail vehicle direct-current power source |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105552829A (en) * | 2016-03-11 | 2016-05-04 | 中车株洲电力机车有限公司 | Protective circuit of low-voltage equipment continuously working on locomotive |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4562506A (en) * | 1984-02-14 | 1985-12-31 | Cooper Industries, Inc. | Distribution line powered switchgear control |
| CN101207282A (en) * | 2007-12-18 | 2008-06-25 | 上海地铁运营有限公司 | Apparatus and method for implementation of orbit traffic direct current feed protection |
| CN201435600Y (en) * | 2009-03-31 | 2010-03-31 | 上海致达智利达系统控制有限责任公司 | Urban railway traffic DC traction power supply system microcomputer protection and measurement and control unit |
| CN202997496U (en) * | 2012-12-21 | 2013-06-12 | 国电南瑞科技股份有限公司 | Metro direct-current protection apparatus |
| CN203119441U (en) * | 2013-03-19 | 2013-08-07 | 南京因泰莱配电自动化设备有限公司 | Feeder protection device of subway direct current traction power supply system |
-
2014
- 2014-11-14 CN CN201410642188.XA patent/CN104377661B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4562506A (en) * | 1984-02-14 | 1985-12-31 | Cooper Industries, Inc. | Distribution line powered switchgear control |
| CN101207282A (en) * | 2007-12-18 | 2008-06-25 | 上海地铁运营有限公司 | Apparatus and method for implementation of orbit traffic direct current feed protection |
| CN201435600Y (en) * | 2009-03-31 | 2010-03-31 | 上海致达智利达系统控制有限责任公司 | Urban railway traffic DC traction power supply system microcomputer protection and measurement and control unit |
| CN202997496U (en) * | 2012-12-21 | 2013-06-12 | 国电南瑞科技股份有限公司 | Metro direct-current protection apparatus |
| CN203119441U (en) * | 2013-03-19 | 2013-08-07 | 南京因泰莱配电自动化设备有限公司 | Feeder protection device of subway direct current traction power supply system |
Non-Patent Citations (1)
| Title |
|---|
| 地铁低压配电系统中保护配合问题分析;魏昕;《电气化铁道》;20141031(第5期);第51-54页 * |
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| CN104377661A (en) | 2015-02-25 |
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