CN102815219A - Relay protection circuit used during emergency ventilation switching of air conditioner of railway vehicle - Google Patents
Relay protection circuit used during emergency ventilation switching of air conditioner of railway vehicle Download PDFInfo
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- CN102815219A CN102815219A CN2011101523968A CN201110152396A CN102815219A CN 102815219 A CN102815219 A CN 102815219A CN 2011101523968 A CN2011101523968 A CN 2011101523968A CN 201110152396 A CN201110152396 A CN 201110152396A CN 102815219 A CN102815219 A CN 102815219A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention relates to a relay protection circuit used during switching between normal ventilation and emergency ventilation of an air conditioner of a railway vehicle. Normally closed contacts KA7 are arranged in a normal ventilation loop, normally open contacts KA6 are arranged in an emergency ventilation loop, normally closed contacts in a secondary-side loop of a transformer and normally open contacts in a loop of an inverter are positioned on the same point COM, so that each contact of a relay KA7 does not participate in switching between a normal ventilation mode and an emergency ventilation mode but is only used as a switching contact to feed signals of the emergency ventilation mode to a controller, and accordingly a vehicle monitoring system can receive the corresponding ventilation signals. As the contacts, which are positioned on the same point COM, of the relay, cannot be used simultaneously, unreliable electric interlocking can be stopped regardless of whether the system is switched from the normal ventilation mode to the emergency ventilation mode or is switched from the emergency ventilation mode to the normal ventilation mode, and the transformer and the inverter are prevented from being burned.
Description
Technical field
The present invention relates to guideway vehicle air-conditioning manufacturing technology field, be specifically related to the single-pole double throw (SPDT) type relay protection circuit of when the normal ventilation of guideway vehicle air-conditioning is switched with emergency ventilation, using.
Background technology
Subway (comprising light rail) be some big cities of China at present in the urban construction project of greatly developing, therefore, subway can appear in the more city of China, the demand in subway train compartment also can be increasing.Because the particular surroundings of subway operation and huge ridership; In the design and manufacturing in subway train compartment; A/c system (comprising ventilation) is very important; Therefore, the vitals that the subway train air-conditioning becomes the design of subway train compartment and makes, and ventilation design is the most important thing in the design of air conditioning link.In the time need not freezing or heat in the railway carriage, the a/c system of guideway vehicle will only start air vent mode, and promptly a/c system only moves to ventilate and changes the wind part.At present, the air vent mode of guideway vehicle a/c system is divided into two kinds: first kind is normal ventilation, and promptly the ventilating fan power supply in the air-conditioning unit is provided by the accessory feed APU on the car; Second kind is that urgent inversion is ventilated, if i.e. accessory feed APU et out of order, the monitored control system of guideway vehicle will send signal and give the air-conditioning control housing, shows that APU lost efficacy, and the guideway vehicle a/c system will start the emergency ventilation mode operation.
The urgent inversion employed electromagnetic relay that ventilates is single-pole double throw (SPDT) type relay, and is as shown in Figure 2.In theory, when two relays simultaneously electric, then all contacts of two relays also should be moved simultaneously.But; Generally have deviation owing to make the synchroneity of confirming the contact contact in the operation at relay; Again since a. g. of each relay coil do not have and wait, thereby the electromagnetism the suction-combining force has difference (general response time is 0～0.05 second), causes simultaneously to such an extent that does not but move simultaneously electric its contact of relay; Bring hidden danger to design, referring to Fig. 1.Employed voltage transformer is a single transformer among Fig. 1, and rated voltage is AC380V/100V, AC380V/210V, an AC380V/230V third gear altogether.Existing is to set forth below example is done with AC380V/100V.
(referring to accompanying drawing 1) when the a/c system of guideway vehicle when normal air vent mode switches to the emergency ventilation pattern; Transformer secondary side loop (KA7) is not if in time break off; So; This situation just is equivalent to secondary side misconnection (urgent inverter output voltage is 220V) on the 220V power supply, and it will be very big that its result causes the secondary exciting current.Because main flux ￠ m is a design value during former edge joint rated voltage, iron circuit is near saturated, and the close Bm of maximum magnetic flux is near saturation value; At this moment secondary voltage is U2 ≈ E2, i.e. E2=100V.Because KA7 does not in time break off, equal secondary is received on the urgent inverter output end 220V, because the secondary leakage impedance is very little now; Voltage and electromotive force are approximately equal; Therefore be E2 ≈ U2=220V, compare during with former edge joint 380V that secondary electromotive force size increases to original 2.2 times.We know, E2=4.44fW2 ￠ m, so ￠ m also increases to original 2.2 times, the close Bm of magnetic also increases to original 2.2 times.Bm has arrived turning round a little of curve of magnetization during normal the operation, and Bm increases to 2.2 times, and the excitation magneto motive force will sharply increase, and exciting current is provided by secondary, and exciting current is very big, can be several times as much as rated current, causes voltage transformer to burn out.
When the a/c system of guideway vehicle when urgent air vent mode switches to normal air vent mode; Emergency ventilation loop (KA6) is if can not in time break off, and the Circuit Fault on Secondary Transformer outgoing current imports inverter output end, through the electric capacity charging of the flywheel diode among the IGBT to major loop; This moment is not owing to there is the obstruction of buffer resistance; Charging current is very big, and phase fault takes place, and causes burning out of inverter power module.
Summary of the invention
The technical matters that the present invention will solve is: eliminate relay and make the hidden danger that defective is brought to design; Guarantee that the guideway vehicle a/c system has the failure-free electrical interlocks during conversion between normal air vent mode and emergency ventilation pattern; For this reason, provide a kind of guideway vehicle air-conditioning promptly to switch the relay protection circuit when ventilating.
The principle of single-pole double throw (SPDT) type relay is: one often open, one normally closed (as shown in Figure 2), in the electrical equipment main body, be provided with movable iron.It is that swing at the center that said movable iron is swung fulcrum through the excitation of magnet coil mechanism with it, makes the electric contact switching mechanism with movable terminal and two fixed terminals carry out on-off action, and still, these two electric contacts are can not be simultaneously applied.The present invention has utilized this technical characterictic.
For solving the problems of the technologies described above, the technical scheme that the present invention takes is:
A kind of guideway vehicle air-conditioning promptly switches the relay protection circuit when ventilating; In normal ventilation circuit, be provided with the KA7 normally closed contact, in the emergency ventilation loop, be provided with the KA6 open contact, for the contact of avoiding KA7 and KA6 can not strictness moving the device damage that causes simultaneously; It is characterized in that; Used open contact is the contact on the same COM point in normally closed contact that uses in the transformer secondary side loop and the inverter loop, that is, relay normally closed contact and emergency ventilation loop repeat circuit open contact in the normal ventilation circuit are total to the contact that COM is ordered; The handoff functionality of normal ventilation and two kinds of patterns of emergency ventilation is no longer participated in the contact of relay K A7; Just, give controller, make vehicle monitoring system receive corresponding ventilation signal the signal feedback of air vent mode as a contact.
In the described relay protection circuit; Contact on the same COM point of relay can not be used simultaneously, that is, last 21/24 open contact of KA6 and 21/ 22 normally closed contacts can not use simultaneously; Therefore; No matter system switches to the emergency ventilation pattern by normal air vent mode, still by the emergency ventilation mode switch to normal air vent mode, can stop the electrical interlocks phenomenon of ineffective (causing voltage transformer and inverter to burn out).
The good effect that guideway vehicle air-conditioning of the present invention promptly switches the relay protection circuit when ventilating is:
Utilize two electric contacts one of single-pole double throw (SPDT) type relay often open, one normally closed; Can not simultaneously applied technical characterictic; Used open contact is set to the contact on the same COM point in normally closed contact that uses in the transformer secondary side loop and the inverter loop; Make the KA7 normally closed contact in the normal ventilation circuit no longer participate in the switching of normal ventilation and two kinds of patterns of emergency ventilation; A contact of just transmitting signal when switching guarantees that the guideway vehicle a/c system has the failure-free electrical interlocks during conversion between normal air vent mode and emergency ventilation pattern, guaranteed the normal use in subway train compartment.
Description of drawings
The electrical schematic diagram of existing relay protection circuit when accompanying drawing 1 ventilates for the guideway vehicle air-conditioning promptly switches;
Accompanying drawing 2 is a single-pole double throw (SPDT) type relay construction scheme drawing;
The electrical schematic diagram of the relay protection circuit when accompanying drawing 3 ventilates for guideway vehicle air-conditioning of the present invention promptly switches;
The wiring schematic diagram of existing relay when accompanying drawing 4 ventilates for the guideway vehicle air-conditioning promptly switches;
The wiring schematic diagram of the relay protection circuit when accompanying drawing 5 ventilates for guideway vehicle air-conditioning of the present invention promptly switches.
The specific embodiment
Provide the specific embodiment that guideway vehicle air-conditioning of the present invention promptly switches the relay protection circuit when ventilating below in conjunction with accompanying drawing, but be noted that enforcement of the present invention is not limited to following embodiment.
Referring to accompanying drawing 3.Utilize two electric contacts one of single-pole double throw (SPDT) type relay often open, one normally closed; Can not simultaneously applied technical characterictic; Used open contact is set to the contact on the same COM point in normally closed contact that uses in relay protection circuit transformer secondary side loop when guideway vehicle air-conditioning of the present invention promptly switches ventilation and the inverter loop; That is, with the normally closed contact in the normal ventilation circuit be arranged to the emergency ventilation loop in the open contact COM normally closed contact of ordering altogether because last 21/24 open contact of KA6 and 21/ 22 normally closed contacts can not use simultaneously; Therefore; No matter system switches to the emergency ventilation pattern by normal air vent mode, still by the emergency ventilation mode switch to normal air vent mode, can stop the electrical interlocks phenomenon of ineffective (causing voltage transformer and inverter to burn out).In the protective circuit of the present invention; KA7 normally closed contact in the normal ventilation circuit is no longer participated in the switching of normal ventilation and two kinds of patterns of emergency ventilation; Just give controller with the signal feedback of air vent mode, make vehicle monitoring system receive corresponding ventilation signal as a contact of switching.
Referring to attaching Figure 4 and 5.
The wiring schematic diagram of the relay protection circuit the when wiring schematic diagram of existing relay and Fig. 5 guideway vehicle air-conditioning of the present invention promptly switched ventilation when Fig. 4 guideway vehicle air-conditioning was promptly switched ventilation compares, and can find out difference with the prior art of the present invention:
In accompanying drawing 4, in the emergency ventilation loop on the KA6 open contact 21/ 22 normally closed contacts be stand-by state, this closing of contact when 21/24 open contact is emergency ventilation; Opened this contact when 21/ 22 normally closed contacts were emergency ventilation on the KA7 normally closed contact in the normal ventilation circuit, and 21/24 open contact is a stand-by state;
In accompanying drawing 5, opened this contact when 21/ 22 normally closed contacts were emergency ventilation on the KA6 open contact in the emergency ventilation loop; This closing of contact when 21/24 open contact is emergency ventilation; In the normal ventilation circuit on the KA7 normally closed contact 21/ 22 normally closed contacts be stand-by state; 21/24 open contact also is a stand-by state.Also promptly, the KA7 normally closed contact in the normal ventilation circuit is no longer participated in the switching of normally ventilation and two kinds of patterns of emergency ventilation, and a contact of transmission signal makes vehicle monitoring system receive corresponding ventilation signal during just as switching.
Claims (2)
1. a guideway vehicle air-conditioning promptly switches the relay protection circuit when ventilating; In normal ventilation circuit, be provided with the KA7 normally closed contact, in the emergency ventilation loop, be provided with the KA6 open contact, for not moving the device damage that causes simultaneously in the contact of avoiding KA7 and KA6; It is characterized in that; Used open contact is the contact on the same COM point in normally closed contact that uses in the transformer secondary side loop and the inverter loop, that is, relay normally closed contact and emergency ventilation loop repeat circuit open contact in the normal ventilation circuit are total to the contact that COM is ordered; The handoff functionality of normal ventilation and two kinds of patterns of emergency ventilation is no longer participated in the contact of relay K A7; Just, give controller, make vehicle monitoring system receive corresponding ventilation signal the signal feedback of air vent mode as a contact.
2. guideway vehicle air-conditioning according to claim 1 promptly switches the relay protection circuit when ventilating; It is characterized in that; Contact on the same COM point of relay can not be used simultaneously, and promptly last 21/24 open contact of KA6 and 21/ 22 normally closed contacts can not use simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110152396.8A CN102815219B (en) | 2011-06-08 | 2011-06-08 | Relay protection circuit used during emergency ventilation switching of air conditioner of railway vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110152396.8A CN102815219B (en) | 2011-06-08 | 2011-06-08 | Relay protection circuit used during emergency ventilation switching of air conditioner of railway vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102815219A true CN102815219A (en) | 2012-12-12 |
| CN102815219B CN102815219B (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110152396.8A Expired - Fee Related CN102815219B (en) | 2011-06-08 | 2011-06-08 | Relay protection circuit used during emergency ventilation switching of air conditioner of railway vehicle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105151061A (en) * | 2015-08-28 | 2015-12-16 | 石家庄国祥运输设备有限公司 | Emergency ventilation control circuit of railway vehicle |
| CN107270496A (en) * | 2017-07-31 | 2017-10-20 | 中车南京浦镇车辆有限公司 | A kind of intelligence control system and method for lifting the impression of track train passenger comfortableness |
| CN107521514A (en) * | 2017-08-16 | 2017-12-29 | 中车株洲电力机车有限公司 | A kind of rail vehicle emergency ventilation control method and system |
| CN113241841A (en) * | 2021-05-25 | 2021-08-10 | 郑州海王实业有限公司 | Power distribution circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2710988Y (en) * | 2004-06-09 | 2005-07-20 | 银川机务段科学技术协会科技服务部 | Intelligent control system for air-cooling system of electric locomotive |
| CN200992206Y (en) * | 2006-12-15 | 2007-12-19 | 中国南车集团武昌车辆厂 | Diesel-engine drive device of double refrigerator group for railway mechanical refrigeration vehicle |
| US20110062777A1 (en) * | 2009-09-16 | 2011-03-17 | Jack Sotnikow | Battery backup for vehicle emergency communicator |
| CN202169946U (en) * | 2011-06-08 | 2012-03-21 | 上海松芝轨道车辆空调有限公司 | Relay protection circuit for emergency ventilation switch of air conditioner on rail vehicle |
-
2011
- 2011-06-08 CN CN201110152396.8A patent/CN102815219B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2710988Y (en) * | 2004-06-09 | 2005-07-20 | 银川机务段科学技术协会科技服务部 | Intelligent control system for air-cooling system of electric locomotive |
| CN200992206Y (en) * | 2006-12-15 | 2007-12-19 | 中国南车集团武昌车辆厂 | Diesel-engine drive device of double refrigerator group for railway mechanical refrigeration vehicle |
| US20110062777A1 (en) * | 2009-09-16 | 2011-03-17 | Jack Sotnikow | Battery backup for vehicle emergency communicator |
| CN202169946U (en) * | 2011-06-08 | 2012-03-21 | 上海松芝轨道车辆空调有限公司 | Relay protection circuit for emergency ventilation switch of air conditioner on rail vehicle |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105151061A (en) * | 2015-08-28 | 2015-12-16 | 石家庄国祥运输设备有限公司 | Emergency ventilation control circuit of railway vehicle |
| CN107270496A (en) * | 2017-07-31 | 2017-10-20 | 中车南京浦镇车辆有限公司 | A kind of intelligence control system and method for lifting the impression of track train passenger comfortableness |
| CN107521514A (en) * | 2017-08-16 | 2017-12-29 | 中车株洲电力机车有限公司 | A kind of rail vehicle emergency ventilation control method and system |
| CN113241841A (en) * | 2021-05-25 | 2021-08-10 | 郑州海王实业有限公司 | Power distribution circuit |
| CN113241841B (en) * | 2021-05-25 | 2023-04-07 | 郑州海王实业有限公司 | Power distribution circuit |
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| Publication number | Publication date |
|---|---|
| CN102815219B (en) | 2015-04-08 |
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Granted publication date: 20150408 Termination date: 20200608 |