CN1794551B - Locomotive 110v control power supply - Google Patents
Locomotive 110v control power supply Download PDFInfo
- Publication number
- CN1794551B CN1794551B CN 200510032487 CN200510032487A CN1794551B CN 1794551 B CN1794551 B CN 1794551B CN 200510032487 CN200510032487 CN 200510032487 CN 200510032487 A CN200510032487 A CN 200510032487A CN 1794551 B CN1794551 B CN 1794551B
- Authority
- CN
- China
- Prior art keywords
- module
- output
- input
- power
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
This invention relates to a 110V control supply of a locomotive including a first input circuit, a first supply module, an output circuit, a second input circuit, a second supply module and an assistant supply output circuit, which applies a double-module hot backup method and utilizes a simple parallel way, when a module in which is fault, it exits automatically and realizes hot backup and capacity redundance at the same time after considering the capacity redundance of the system to meet the requirement of redundance design and backup of the locomotive control power system.
Description
Technical field
The present invention relates to a kind of power-supply system, particularly a kind of locomotive 110V control power supply that is used for the locomotive control power supply.
Background technology
Along with the railway speed raising, the section blocking time is shorter and shorter, causes machine broken in case 110V control power supply breaks down, and its loss will be huge.But the pattern that power cabinet adopted of locomotive 110V control at present is fundamentally to avoid this danger theoretically.Present most widely used Thyristor Controlled rectifier power source cabinet, in case its inner circuits for triggering, control circuit or main circuit generation problem arbitrarily, power cabinet can't be exported the 110V power supply.Adopt " N+1 " mode of the several submodules of controller band, the system complex degree improves greatly, improves the contingent probability of fault, in case and main controller break down, power cabinet can't be exported the 110V power supply.The pattern of the bimodulus piece cold standby that is adopted on SS7D, the SS7E locomotive though realized system backup, needs manual intervention now, and it is broken to get rid of the machine that causes because of driver inattention.In addition owing to adopt the pattern of cold standby, capacitance loss half, cause the wasting of resources.Continuous development along with the electric locomotive technology, improving constantly of the controlled function of locomotive and control precision, and people are to the improving constantly of work situation comfort level, on the locomotive the parts of hanging more and more, also increasing to the maximum power requirement that locomotive control power can be exported.Therefore and locomotive is subjected to the restriction of volumetric spaces own and weight, and the requirement to the volume and weight of locomotive component also more and more trends towards miniaturization and lightweight.Now most widely used 110V control power cabinet is a Thyristor Controlled rectifier power source cabinet, owing to be operated in power frequency 50Hz frequency range, its input isolating transformer and out put reactor are all very huge, heavy, and output ripple is big, output accuracy is low, response speed is slow, have big overshoot.At present, clear and definite regulation all during the control power system design of locomotive requires the control power-supply system that Redundancy Design and backup are arranged, and requires and can automatically switch in the world.
Summary of the invention
Purpose of the present invention aims to provide a kind of locomotive 110V control power supply, and it can satisfy the requirement that the locomotive control power system has Redundancy Design and backup, and can automatically switch.
It comprises first input circuit 2, first power module 3, output circuit 4, second input circuit 5, second source module 6 and accessory power supply output circuit 7, wherein:
Described first input circuit 2 is made of input terminal AC338, interchange input circuit breaker FA30, exchanges input circuit breaker FA30 and is connected between the input terminal AC338 and first power module 3;
Described first power module 3 comprises control unit 1, input filter Z1, pre-charge circuit 9, the straight conversion module 10 of friendship, dc-dc conversion module 11, output filter Z2, filter Z3, current sensor TA1, the voltage sensor TV1 that is made of single-chip microcomputer and peripheral circuit thereof;
The output of described first input circuit 2 links to each other with input filter Z1, pre-charge circuit 9 is connected on alternating voltage is converted between the straight conversion module 10 of friendship and this input filter Z1 of direct voltage, and the output of the straight conversion module 10 of described friendship links to each other with not enough galvanic current being pressed the input of the dc-dc conversion module 11 that is converted to the galvanic current pressure; Described filter Z3 is connected between the power supply side of the control power input that comes from storage battery and control unit 1, and the control impuls output of this control unit 1 links to each other with the pulse control input end of the switch element of described dc-dc conversion module 11; Output filter Z2 is connected between the output and output circuit 4 of described dc-dc conversion module 11;
Described starting switch circuit 9 is made of with contactor KM2 is in parallel the series arm that contactor KM12 and charging resistor R1 constitute;
The straight conversion module 10 of described friendship comprises first rectifier bridge that is made of main switch element V1, V2, choke inductor L1 and the DC link that is made of second series arm of first series arm of capacitor C1, C2, resistor R 3, R4, and the end of choke inductor L1 links to each other with an output of first rectifier bridge, DC link be connected in parallel on choke inductor L1 the other end and and another output of first rectifier bridge between;
Described dc-dc conversion module 11 comprises the switch element V3 at the DC link two ends that are connected in parallel on the straight conversion module 10 of described friendship, the transformer Tr1 that two inputs link to each other with the intermediate point of the intermediate point of this switch element V3 and the DC link of the straight conversion module 10 of described friendship respectively, by switch element V4, V5, V6, second rectifier bridge that V7 constitutes, two inputs of this second rectifier bridge link to each other with two outputs of described transformer Tr1 respectively, the choke inductor L2 that one end links to each other with an output of second rectifier bridge, by second DC link that capacitor C5 and resistor R 7 parallel connections constitute, this second DC link is connected in parallel between the other end and another output of second rectifier bridge of choke inductor L2;
Described voltage sensor TV1 is connected in parallel on the DC link two ends of the straight conversion module 10 of described friendship, and its voltage sampling signal output links to each other with the corresponding input of control unit 1;
Described current sensor TA1 is connected between the output and output filter Z2 of dc-dc conversion module 11 of described first power module 3, and its current sampling signal output links to each other with the corresponding input of control unit 1;
Described output circuit 4 comprises first module output circuit breaker Q S35, battery switch QS33 and the charge protection circuit breaker FA31 that is series at successively between described first power module, 3 outputs and the storage battery input, and second module output circuit breaker Q S36 that is series at described second source module 6 outputs and other 110VDC load input terminal;
Described second input circuit 5 is made of input terminal AC338, interchange input circuit breaker FA40, exchanges input circuit breaker FA40 and is connected between input terminal AC338 and the second source module 6;
Described second source module 6 is identical with the structure of described first power module 3;
Described accessory power supply output circuit 7 comprises first accessory power supply and second accessory power supply that 110 volts of DC power supply are converted to 24 volts of power supplys that is in parallel with the output of first module output circuit breaker Q S35 or second module output circuit breaker Q S36 respectively by rotary switch SA1;
The control power input of described first power module 3, second source module 6 links to each other with the output of second module output circuit breaker Q S36 with first module output circuit breaker Q S35 by input circuit breaker FA41, FA42 respectively.
Because the bimodulus that the present invention adopts heat is equipped with mode, utilizes simple parallel way, and is out of service automatically when one of them module breaks down, and need not manual intervention.After having considered the power system capacity redundancy, the Hot Spare that can realize simultaneously and capacity redundancy.Compare with the pattern of cold standby, on the basis that does not increase volume, weight and any input, the peak power output of system is doubled.
Description of drawings
Fig. 1 is a schematic block circuit diagram of the present invention;
Fig. 2 is circuit theory diagrams of the present invention;
Fig. 3 is a power module circuitry schematic diagram of the present invention.
Embodiment
As Figure 1-3, it comprises first input circuit 2, first power module 3, output circuit 4, second input circuit 5, second source module 6 and accessory power supply output circuit 7, wherein:
Described first input circuit 2 is made of input terminal AC338, interchange input circuit breaker FA30, exchanges input circuit breaker FA30 and is connected between the input terminal AC338 and first power module 3;
Described first power module 3 comprises control unit 1, input filter Z1, pre-charge circuit 9, the straight conversion module 10 of friendship, dc-dc conversion module 11, output filter Z2, filter Z3, current sensor TA1, the voltage sensor TV1 that is made of single-chip microcomputer and peripheral circuit thereof;
The output of described first input circuit 2 links to each other with input filter Z1, pre-charge circuit 9 is connected on alternating voltage is converted between the straight conversion module 10 of friendship and this input filter Z1 of direct voltage, and the output of the straight conversion module 10 of described friendship links to each other with not enough galvanic current being pressed the input of the dc-dc conversion module 11 that is converted to the galvanic current pressure; Described filter Z3 is connected between the power supply side of the control power input that comes from storage battery and control unit 1, and the control impuls output of this control unit 1 links to each other with the pulsed drive control input end of the switch element of described dc-dc conversion module 11; Output filter Z2 is connected between the output and output circuit 4 of described dc-dc conversion module 11;
Described pre-charge circuit 9 is made of with contactor KM2 is in parallel the series arm that contactor KM12 and charging resistor R1 constitute;
The straight conversion module 10 of described friendship comprises first rectifier bridge that is made of main switch element V1, V2, choke inductor L1 and the DC link that is made of second series arm of first series arm of capacitor C1, C2, resistor R 3, R4, and the end of choke inductor L1 links to each other with the cathode output end of first rectifier bridge, DC link be connected in parallel on choke inductor L1 the other end and and the cathode output end of first rectifier bridge between;
Described dc-dc conversion module 11 comprises the switch element V3 at the DC link two ends that are connected in parallel on the straight conversion module 10 of described friendship, the transformer Tr1 that two inputs link to each other with the intermediate point of the intermediate point of this switch element V3 and the DC link of the straight conversion module 10 of described friendship respectively, by switch element V4, V5, V6, second rectifier bridge that V7 constitutes, two inputs of this second rectifier bridge link to each other with two outputs of described transformer Tr1 respectively, the choke inductor L2 that one end links to each other with the cathode output end of second rectifier bridge, by second DC link that capacitor C5 and resistor R 7 parallel connections constitute, this second DC link is connected in parallel between the other end and the second rectifier bridge cathode output end of choke inductor L2;
Described voltage sensor TV1 is connected in parallel on the DC link two ends of the straight conversion module 10 of described friendship, and its voltage sampling signal output links to each other with the corresponding input of control unit 1;
Described current sensor TA1 is connected between the output and output filter Z2 of dc-dc conversion module 11 of described first power module 3, and its current sampling signal output links to each other with the corresponding input of control unit 1;
Described output circuit 4 comprises first module output circuit breaker Q S35, battery switch QS33 and the charge protection circuit breaker FA31 that is series at successively between described first power module, 3 outputs and the storage battery input, and second module output circuit breaker Q S36 that is series at described second source module 6 outputs and other 110VDC load input terminal;
Described second input circuit 5 is made of input terminal AC338, interchange input circuit breaker FA40, exchanges input circuit breaker FA40 and is connected between input terminal AC338 and the second source module 6;
Described second source module 6 is identical with the structure of described first power module 3;
Described accessory power supply output circuit 7 comprises first accessory power supply and second accessory power supply that 110 volts of DC power supply are converted to 24 volts of power supplys that is in parallel with the output of first module output circuit breaker Q S35 or second module output circuit breaker Q S36 respectively by rotary switch SA1; The control power input of described first power module 3, second source module 6 links to each other with the output of second module output circuit breaker Q S36 with first module output circuit breaker Q S35 by input circuit breaker FA41, FA42 respectively.It can be used as the control power supply of modularization SS7E electric locomotive, and this power cabinet satisfies the pertinent regulations among TB/T3021-2001, TB/T3034-2002, TB/T1333.1-2002, TB/T1508-93, the TB/T1507-93.It is input as single phase alternating current (A.C.) 338V (allowing to fluctuate) in its prescribed limit, be output as direct current 110V (do not consider the influence of input voltage and load variations, allow to change in the scope of appointment).This power cabinet also externally provides the direct current 24V power supply of low capacity in addition.
Two 110V power modules of the present invention can in parallel externally provide the DC110V power supply of about 80A.It is input as single phase alternating current (A.C.) 338V (allowing to fluctuate) in its prescribed limit, be output as direct current 110V (do not consider the influence of input voltage and load variations, allow to change in the scope of appointment).During operate as normal, two module parallel connections power to the load, the electric current of exportable about 80A, when one of them power module fault, automatically out of service, do not influence the operate as normal of another power module, and remaining normal power source module can be exported DC110V and continues as control system power supply is provided.110V power module major component adopts IPM, has overvoltage, under-voltage, short circuit, overcurrent, defencive function such as overheated, and panel has normally, the fault display lamp.This 110V power module adopts all-sealed structure, and radiator leaves independently air duct radiation, has avoided the fault that causes because of reasons such as dust stratifications.These have improved the reliability of power-supply system greatly.In addition, this supply unit has been optimized the EMC performance.
Auxiliary power unit can externally provide the DC24V power supply of 2A.This supply unit inside is made up of two identical power modules, wherein makes cold standby for one, can be transformed into another accessory power supply module work by the rotary switch SA1 of power cabinet top panel easily.
FA30, FA40, QS35, QS36, QS33, FA31 are respectively 1 input of 110V power module, 2 inputs of 110V power module, 1 output of 110V power module, 2 outputs of 110V power module, storage battery circuit breaker, charge protection circuit breaker.
The critical piece of this power cabinet is two 110V power modules, and power module adopts system controlled by computer, has and improves reliable self-diagnostic function, and this makes the easy operation and maintenance of this power module.
Power module get electric after, closed contactor KM1, main power source is given capacitor C 1～C2 charging by charging resistor R1, after the voltage of DC link (capacitor C 1 and C2 two ends) surpassed certain value, contactor KM2 closure was with the R1 short circuit.Then control board sends pulse, drives main switch element IPM (Intelligent Power Module) and starts working, the DC110V that power supply output is stable.The sampling of middle dc voltage is finished by voltage sensor TV1.Current sensor TA1 is responsible for the sampling of output current.Z1, Z2, Z3 are respectively the filters of main power source input, output, the input of control power supply, they the EMC performance of optimization system widely is set.Not only will reduce the interference of system to miscellaneous equipment effectively, and obtain effective inhibition because of outside interference to system simultaneously, the reliability of system also will improve greatly.
SA1 is a rotary switch, and it has 3 gears, is respectively " auxilliary electricity 1 ", " stopping ", " auxilliary electricity 2 ".It is used for the accessory power supply module is changed, SA1 puts " auxilliary electricity 1 ", then accessory power supply module 1 work (accessory power supply module 2 cold standbies), SA1 puts " auxilliary electricity 2 ", then accessory power supply module 2 work (accessory power supply module 1 cold standby), SA1 puts " stopping ", and then accessory power supply module 1,2 quits work.Rotary switch SA1 places auxilliary electricity 1 or auxilliary electricity 2, and accessory power supply begins to export DC24V.Closure battery switch QS33 and charge protection switch FA31, closed 110V power module control power supply input circuit breaker FA41, FA42, the closed interchange imported open circuit FA30, FA40, module output circuit breaker Q S35, QS36.
Console switch on two 110V power module front panels is placed the wait position.At this moment, control board gets electric, and blower fan is started working, and at this moment, again console switch is placed start bit, and the 110V power module begins to export DC110V.
When a certain 110V power module fault, this power module stops output, and the exportable DC110V of remaining normal power module continues as control circuit provides power supply.
Claims (3)
1. a locomotive 110V control power supply is characterized in that it comprises first input circuit (2), first power module (3), output circuit (4), second input circuit (5), second source module (6) and accessory power supply output circuit (7), wherein:
Described first input circuit (2) is made of input terminal AC338, interchange input circuit breaker FA30, exchanges input circuit breaker FA30 and is connected between input terminal AC338 and first power module (3);
Described first power module (3) comprises the control unit (1), input filter Z1, the pre-charge circuit (9) that are made of single-chip microcomputer and peripheral circuit thereof, hands over straight conversion module (10), dc-dc conversion module (11), output filter Z2, filter Z3, current sensor TA1, voltage sensor TV1;
The output of described first input circuit (2) links to each other with input filter Z1, pre-charge circuit (9) is connected on alternating voltage is converted between the straight conversion module of friendship (10) and this input filter Z1 of direct voltage, and the output of the straight conversion module of described friendship (10) links to each other with not enough galvanic current being pressed the input of the dc-dc conversion module (11) that is converted to the galvanic current pressure; Described filter Z3 is connected between the power supply side of the control power input that comes from storage battery and control unit (1), and the control impuls output of this control unit (1) links to each other with the pulsed drive control input end of the switch element of described dc-dc conversion module (11); Output filter Z2 is connected between the output and output circuit (4) of described dc-dc conversion module (11);
Described voltage sensor TV1 is connected in parallel on the DC link two ends of the straight conversion module of described friendship (10), and its voltage sampling signal output links to each other with the corresponding input of control unit (1);
Described current sensor TA1 is connected between the output and output filter Z2 of dc-dc conversion module (11) of described first power module (3), and its current sampling signal output links to each other with the corresponding input of control unit (1);
Described output circuit (4) comprises first module output circuit breaker Q S35, battery switch QS33 and the charge protection circuit breaker FA31 that is series at successively between described first power module (3) output and the storage battery input, and second module output circuit breaker Q S36 that is series at described second source module (6) output and other 110VDC load input terminal;
Described second input circuit (5) is made of input terminal AC338, interchange input circuit breaker FA40, exchanges input circuit breaker FA40 and is connected between input terminal AC338 and the second source module (6);
Described second source module (6) is identical with the structure of described first power module (3);
Described accessory power supply output circuit (7) comprises first accessory power supply and second accessory power supply that 110 volts of DC power supply are converted to 24 volts of power supplys that is in parallel with the output of first module output circuit breaker Q S35 or second module output circuit breaker Q S36 respectively by rotary switch SA1;
The control power input of described first power module (3), second source module (6) links to each other with the output of second module output circuit breaker Q S36 with first module output circuit breaker Q S35 by input circuit breaker FA41, FA42 respectively.
2. a kind of locomotive 110V control power supply as claimed in claim 1 is characterized in that described pre-charge circuit (9) is made of with contactor KM2 is in parallel the series arm that contactor KM12 and charging resistor R1 constitute;
The straight conversion module of described friendship (10) comprises first rectifier bridge that is made of main switch element V1, V2, choke inductor L1 and the DC link that is made of second series arm of first series arm of capacitor C1, C2, resistor R 3, R4, and the end of choke inductor L1 links to each other with the cathode output end of first rectifier bridge, DC link be connected in parallel on choke inductor L1 the other end and and the cathode output end of first rectifier bridge between;
Described dc-dc conversion module (11) comprises the switch element V3 at the DC link two ends that are connected in parallel on the straight conversion module of described friendship (10), the transformer Tr1 that two inputs link to each other with the intermediate point of the intermediate point of this switch element V3 and the DC link of the straight conversion module of described friendship (10) respectively, by switch element V4, V5, V6, second rectifier bridge that V7 constitutes, two inputs of this second rectifier bridge link to each other with two outputs of described transformer Tr1 respectively, the choke inductor L2 that one end links to each other with the cathode output end of second rectifier bridge, by second DC link that capacitor C5 and resistor R 7 parallel connections constitute, this second DC link is connected in parallel between the other end and the second rectifier bridge cathode output end of choke inductor L2.
3. a kind of locomotive 110V as claim 1 or 2 controls power supply, it is characterized in that the bimodulus heat that adopts is equipped with mode, described first power module (3), second source module (6) need not to add current equalizing bus bar or special-purpose equalizing controller, can realize direct parallel operation, automatic current equalizing; Automatically out of service when one of them module breaks down, need not manual intervention; After having considered the power system capacity redundancy, promptly simultaneously realizable Hot Spare and capacity redundancy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510032487 CN1794551B (en) | 2005-12-02 | 2005-12-02 | Locomotive 110v control power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510032487 CN1794551B (en) | 2005-12-02 | 2005-12-02 | Locomotive 110v control power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1794551A CN1794551A (en) | 2006-06-28 |
| CN1794551B true CN1794551B (en) | 2010-10-20 |
Family
ID=36805875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510032487 Expired - Fee Related CN1794551B (en) | 2005-12-02 | 2005-12-02 | Locomotive 110v control power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1794551B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101378188B (en) * | 2008-09-27 | 2011-05-11 | 华为终端有限公司 | Heat protection method for device and corresponding device |
| US7830036B2 (en) * | 2008-09-30 | 2010-11-09 | Rockwell Automation Technologies, Inc. | Power electronic module pre-charge system and method |
| CN104842814B (en) * | 2015-04-14 | 2017-06-23 | 中航爱维客汽车有限公司 | Light bus two-way redundant safety high-tension apparatus and its control system and control method |
| CN105034813B (en) * | 2015-07-03 | 2018-04-10 | 株洲南车时代电气股份有限公司 | Train power supply control device |
| DE102016115823B4 (en) * | 2016-08-25 | 2023-01-05 | Auto-Kabel Management Gmbh | Motor vehicle electrical system and motor vehicle with a motor vehicle electrical system |
| CN106505679A (en) * | 2016-11-28 | 2017-03-15 | 中车大连电力牵引研发中心有限公司 | Rail vehicle charger |
| CN109941108B (en) * | 2019-04-02 | 2021-11-12 | 中车株洲电力机车有限公司 | Rail transit vehicle and fault protection method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6388904B2 (en) * | 1998-01-30 | 2002-05-14 | Kabushiki Kaisha Toshiba | Power supply device for electromotive railcar |
| CN2719639Y (en) * | 2004-04-06 | 2005-08-24 | 谢步明 | Direct current 110V high frequency switching power supply device for electric locomotive |
-
2005
- 2005-12-02 CN CN 200510032487 patent/CN1794551B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6388904B2 (en) * | 1998-01-30 | 2002-05-14 | Kabushiki Kaisha Toshiba | Power supply device for electromotive railcar |
| CN2719639Y (en) * | 2004-04-06 | 2005-08-24 | 谢步明 | Direct current 110V high frequency switching power supply device for electric locomotive |
Non-Patent Citations (6)
| Title |
|---|
| 李健鸣等.110V IPM 高频开关电源的研制.机车电传动 6.1999,(6),8-10. |
| 李健鸣等.110V IPM 高频开关电源的研制.机车电传动 6.1999,(6),8-10. * |
| 毛振平等.DJ1型电力机车辅助***的冗余设计与故障处理.机车电传动 3.2003,(3),27-29. |
| 毛振平等.DJ1型电力机车辅助***的冗余设计与故障处理.机车电传动 3.2003,(3),27-29. * |
| 高海生等.110V大功率高频开关电源的研制.华东交通大学学报21 5.2004,21(5),1-4. |
| 高海生等.110V大功率高频开关电源的研制.华东交通大学学报21 5.2004,21(5),1-4. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1794551A (en) | 2006-06-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1794551B (en) | Locomotive 110v control power supply | |
| CN101604853A (en) | Battery charge and discharge device | |
| CN101604857A (en) | Uninterruptible power system | |
| CN1204423A (en) | Non-break power supply | |
| CN104485821A (en) | Direct current transformer device used for power distribution | |
| CN210468807U (en) | Frequency converter voltage sag protection device based on super capacitor energy storage | |
| CN101071162A (en) | Current converter test circuit | |
| CN205142024U (en) | Railcar rectification cabinet | |
| CN103368410A (en) | Traction converter | |
| US11070079B2 (en) | Integrated power supply system for auxiliary services for power converters | |
| CN207652063U (en) | A kind of elevator energy recovery system based on intelligent super capacitor module | |
| CN109823933A (en) | The four-quadrant elevator converter plant and topological structure of integrated emergency power supply | |
| CN206117298U (en) | Double power source switch device convenient to maintain | |
| CN213989672U (en) | Intelligent energy-saving electric complete cabinet | |
| CN114884045A (en) | Direct current power supply system | |
| CN2223852Y (en) | Uninterrupted power supply special for micro computer system | |
| CN107465188A (en) | Four-quadrant two-way changing device and micro-grid system | |
| CN100380768C (en) | Locomotive air conditioner electric power controlling method and apparatus | |
| CN202616989U (en) | Device for providing pre-charging function and low-voltage debugging power supply function for cascaded high-voltage inverter | |
| CN202524303U (en) | Traction converter | |
| CN202997658U (en) | Inverter and charger integrally modularized H-bridge cascade UPS single/three-phase system | |
| CN219740960U (en) | Intelligent bridging management module for direct-current power grid | |
| CN112350587A (en) | Traction-assisted converter and device | |
| CN106411148B (en) | A kind of Traction Substation of Electric Railway hands over straight friendship type power supply system structure from electricity consumption | |
| CN104590057A (en) | Power supply control method for trolley bus and power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101020 Termination date: 20201202 |