CN201373908Y - Variable test-assistant motor unit AC traction transmission test system - Google Patents
Variable test-assistant motor unit AC traction transmission test system Download PDFInfo
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- CN201373908Y CN201373908Y CN200820124032U CN200820124032U CN201373908Y CN 201373908 Y CN201373908 Y CN 201373908Y CN 200820124032 U CN200820124032 U CN 200820124032U CN 200820124032 U CN200820124032 U CN 200820124032U CN 201373908 Y CN201373908 Y CN 201373908Y
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Abstract
The utility model relates to a variable test-assistant motor unit AC traction transmission test system comprising a test-assistant motor unit, a plurality of transmission units and a transmission control unit. The test-assistant motor unit comprises a plurality of test-assistant motors; each transmission unit is used for the power transmission between the test-assistant motor unit and an AC traction transmission device under test; the transmission control unit is connected with the transmission units and is used for selecting a corresponding transmission unit and connecting the transmission unit between the test-assistant motor unit and the AC traction transmission device under test according to the test combination of the test-assistant motor unit and the AC traction transmission device under test. Compared with a synchronous motor unit feedback test system, the variable test-assistant motor unit AC traction transmission test system has the advantages of less power consumption and equipment occupation, wide test range, complete test project and the like.
Description
Technical field
The utility model is the technology that is applied to the alternating current traction kinematic train test field of modern railways rolling stock about a kind of, particularly a kind of variable examination motor combination alternating current traction drive experiment system of accompanying.
Background technology
Along with the development of modern railways rolling stock interchange drive technology, the alternating current traction drive experiment system is also being brought in constant renewal in and development, and technical merit improves constantly, and function is gradually improved.Rolling stock alternating current traction kinematic train generally includes: asynchronous traction motor, traction convertor, tractive transformer.The development trend of alternating current traction drive experiment system is at present:
1. energy consumption type electrical load is progressively eliminated, and replaced by energy feedback type, and the DC load motor is progressively replaced by the AC load motor;
2. test function is more complete, and by single type approval test, the function of progressively integrated system test and the test of research and development property can be simulated various procedures, carries out the multiple performance test of system and parts;
3. adaptive surface is more and more wideer, and multiple standard power supply is provided, and can adapt to the test needs of different capacity grades such as motor train unit, locomotive, subway, light rail, different kinematic trains;
4. the automaticity height is equipped with automatic data collection and disposal system, extensively adopts network technology;
5. control and defencive function are more perfect;
6. measurable technical parameter is more and more;
7. maintenance workload is few.
At present, domestic interchange passes the whirler prescription case that traction dynamic test system adopts " tested asynchronous machine+accompany examination Dyn.+direct current motor+synchronous generator " mostly, and the feedback of electric energy is by synchronous generator generating feedback net.There is following problem in this system:
1. fictitious load is made up of multiple electric motors, and system's control is complicated, is not easy to stablize;
2. big, the operation noise height of pilot system floor area, the later maintenance workload is big, operating cost is high;
3. adopt direct current generator to be invited to be present at a banquet given in honour of a distinguished guest the examination motor, rotating speed is subjected to the restriction of commutator, is difficult to test the high-velocity section of tested motor.
In the figure classification number be that TM712, Document code are that the technical literature that B, article are numbered 1003-1820 (2008) 06-0004-05 discloses a kind of alternating current traction transmission energy mutual feedback testing table, the scope of application of this experiment table is also smaller.
The utility model content
The novel purpose of this use is to solve the following point that existing alternating current traction drive experiment system exists: fictitious load is made up of multiple electric motors, and system's control is complicated, is not easy to stablize; The pilot system floor area is big, operation noise height, the later maintenance workload is big, operating cost is high; Adopt direct current generator to be invited to be present at a banquet given in honour of a distinguished guest the examination motor, rotating speed is subjected to the restriction of commutator, is difficult to test the high-velocity section of tested motor.
The utility model provides a kind of variable examination motor combination alternating current traction drive experiment system of accompanying, and it is characterized in that described system comprises: accompany the test-run a machine group, comprise a plurality of examination motors of accompanying; A plurality of gear units, each described gear unit all are used for described power transmission of accompanying between test-run a machine group and the tested alternating current traction gearing; Motion control unit is connected with described gear unit, is used for accompanying the test of test-run a machine group and tested alternating current traction gearing to make up according to described, calls corresponding described gear unit and is connected in described accompanying between test-run a machine group and the tested alternating current traction gearing.
The pilot system that the utility model provides has advantages such as less energy consumption, hold facility is few, the scope of can trying is wide, pilot project is complete than synchronous unit feedback-type pilot system, possess good controlled test load characteristic, can satisfy the demand that railway locomotive, motor train unit alternating current traction kinematic train carry out various Work condition analogues tests.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the synoptic diagram of system of the present utility model among the embodiment;
Fig. 2 is a unit of testing and controlling of the present utility model and the synoptic diagram of accompanying the examination current transformer to be connected among the embodiment;
Fig. 3 is the synoptic diagram of system of the present utility model among the embodiment;
Fig. 4 is the synoptic diagram of system of the present utility model among the embodiment;
Fig. 5 is the synoptic diagram of system of the present utility model among the embodiment;
Fig. 6 is the synoptic diagram of system of the present utility model among the embodiment;
Fig. 7 is the synoptic diagram of system of the present utility model among the embodiment.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
In order to overcome a series of defectives of prior art, with reference among the international electrical engineering standard IEC61377 " AC motor of electric propulsion-rolling stock-inverter power supply and the compbined test of control system " to the recommendation of alternating current traction gearing testing program, utility model people's design-build a kind of alternating current traction drive experiment system that adopts multiple asynchronous motors variable combination, net side energy mutual feedback.
As shown in Figure 1, the system that provides of the utility model comprises:
Accompany test-run a machine group 1, the described test-run a machine group 1 of accompanying comprises that 4 are accompanied examination current transformer and 4 to accompany examination motor M 1, M2, M3, M4, wherein each is accompanied the examination current transformer to be connected to 1 and accompanies examination motor (as shown in Figure 2), described accompany the examination current transformer can realize the conversion of single-phase alternating current to three-phase alternating current, described accompany the examination motor be ac three-phase asynchronous motor.
A plurality of gear units 3 connect described accompany test-run a machine group 1 and tested alternating current traction gearing 4, and each gear unit all is used to connect the power transmission of accompanying between examination group of motors and the tested alternating current traction gearing.Described gear unit can be made up of transmission gear and shaft coupling.
Unit of testing and controlling 5, be connected in tested alternating current traction gearing 4 current transformer and described 4 accompany the examination current transformer (as shown in Figure 2), being used to control the described test-run a machine group 1 of accompanying provides tractive force and regenerative braking power mutually with different accompany examination motor combination and tested alternating current traction gearing 4, makes and accompanies the test-run a machine group can simulate the load characteristic of tested alternating current traction gearing when different operating condition.Described test cell 5 also connects various sensors, is responsible for the collection analysis of test figure, and technology is well known to those skilled in the art herein, repeats no more herein.
Also comprise motion control unit 6, be connected with described a plurality of gear units 3, be used for accompanying the test of test-run a machine group and tested alternating current traction gearing to make up according to described, call corresponding described gear unit and be connected in described accompanying between test-run a machine group and the tested alternating current traction gearing, promptly along with the different employed examination motor combination of accompanying of the tested alternating current traction gearing of test are also inequality, the gear unit that coupling connects between the two is also inequality.
As shown in Figure 3, the variable examination motor combination alternating current traction drive experiment system of accompanying of the present utility model in one embodiment also can comprise a pressure regulator 7, be connected between described tested alternating current traction gearing 4 and the railway electrical network, described pressure regulator 7 can exchange power supply network 25kV and be transformed to the continuous adjustable voltage of 17～31.5kV, send into described tested alternating current traction gearing 4, to simulate different net voltage fluctuation situations, the runnability of checking tested alternating current traction gearing to depress at different nets.
The system that the utility model provides also can comprise the accessory power supply of other utility appliance such as air cooling equipment, various standards and the fixing known utility appliance such as test platform of slewing, repeats no more herein.
According to the difference of tested alternating current traction gearing power grade, power supply mode, quadruplet accompanies that the test-run a machine group is all or part of to link to each other with tested alternating current traction gearing by kinematic train, for it provides the different tests operating mode required fictitious load.
The system of the present utility model among the embodiment of Figure 4 shows that is applicable to that 1 traction convertor drives the synoptic diagram of tested alternating current traction gearing of the car control power supply mode of 4 traction electric machines.As shown in Figure 4, the power supply that native system uses is railway electrical network single phase industrial frequence 25kV power supply, this electric network source is divided into two-way, wherein one the tunnel through pressure regulator 7, become the continuous adjustable voltage of 17～31.5kV, send into tested alternating current traction gearing, another road connects the former limit winding (1) of accompanying examination transformer 2, that accompanies that 4 secondary windings of examination transformer connect respectively that 4 covers accompany that examination current transformer-accompany examination motor forms accompanies the test-run a machine group, for it provides required electric energy.K11 among the figure, K12 are disconnector K21, and K22 is a grounding switch.Under the control of described motion control unit 6,4 gear units 31,32,33,34 be connected to described accompany in the test-run a machine group accompanying the examination motor M 1, M2, M3, between 4 motors of M4 and tested alternating current traction gearing, described gear unit 31,32,33, comprise in 34 and be used to connect the shaft coupling of accompanying examination motor and tested motor, described unit of testing and controlling (not shown among Fig. 4) sends the traction instruction or the regenerative braking instruction accompanies 4 of the test-run a machine group to accompany the examination current transformer to described, send regenerative braking instruction or traction instruction traction convertor to described tested alternating current traction gearing, described accompany traction convertor that 4 of test-run a machine group accompany examination current transformer and described tested alternating current traction gearing according to described regenerative braking instruction or traction instruction make described when accompanying the examination motor to be in traction (promptly electronic) operating mode tested motor be in regenerative braking (generating) operating mode, and describedly accompany that tested motor is in traction (electronic) operating mode when trying motor and being in regenerative braking (promptly generating electricity) operating mode.So just can simulate the load characteristic of tested alternating current traction gearing, reach the purpose of alternating current traction gearing test at different operating conditions.
The system of the present utility model among the embodiment of Figure 5 shows that is applicable to that 1 traction convertor drives the synoptic diagram of tested alternating current traction gearing of the frame control power supply mode of 2 traction electric machines.As shown in Figure 5, under the control of described motion control unit 6,2 gear units 31,32 be connected to described accompany in the test-run a machine group accompanying the examination motor M 1, between 2 motors of M2 and tested alternating current traction gearing, described unit of testing and controlling (not shown among Fig. 5) sends the traction instruction or the regenerative braking instruction accompanies 2 of the test-run a machine group to accompany examination current transformer (M1 to described, accompanying of M2 tries current transformer), send regenerative braking instruction or traction instruction traction convertor to described tested alternating current traction gearing, described accompany traction convertor that 2 of test-run a machine group accompany examination current transformer and described tested alternating current traction gearing according to described regenerative braking instruction or traction instruction make described when accompanying the examination motor to be in traction (promptly electronic) operating mode tested motor be in regenerative braking (generating) operating mode, and describedly accompany that tested motor is in traction (electronic) operating mode when trying motor and being in regenerative braking (promptly generating electricity) operating mode.So just can simulate the load characteristic of tested alternating current traction gearing, reach the purpose of alternating current traction gearing test at different operating conditions.
Another is applicable to that tested alternating current traction gearing is among the embodiment of frame control power supply mode at the utility model, under the control of described motion control unit 6,1 gear unit 35 is connected in 2 accompanies examination motor M 1, between M2 and 1 the tested motor, other 1 gear unit 36 is connected in 2 accompanies examination motor M 3, between M4 and other 1 tested motor, described gear unit 35, comprise in 36 that 2 in parallel are accompanied the gear set of examination motor and accompanying of 2 parallel connections tried the shaft coupling that motor is connected in tested motor, as shown in Figure 6, so just can drive 1 tested motor of accompanying the examination motor to drive, make system of the present utility model that the wider scope of application be arranged.Described unit of testing and controlling (not shown among Fig. 6) sends the traction instruction or the regenerative braking instruction accompanies 4 of the test-run a machine group to accompany the examination current transformer to described, send regenerative braking instruction or traction instruction traction convertor to described tested alternating current traction gearing, described accompany traction convertor that 4 of test-run a machine group accompany examination current transformer and described tested alternating current traction gearing according to described regenerative braking instruction or traction instruction make described when accompanying the examination motor to be in traction (promptly electronic) operating mode tested motor be in regenerative braking (generating) operating mode, and describedly accompany that tested motor is in traction (electronic) operating mode when trying motor and being in regenerative braking (promptly generating electricity) operating mode.So just can simulate the load characteristic of tested alternating current traction gearing, reach the purpose of alternating current traction gearing test at different operating conditions.
The system of the present utility model among the embodiment of Figure 7 shows that is applicable to that 1 traction convertor drives the synoptic diagram of tested alternating current traction gearing of the axle control power supply mode of 1 traction electric machine.As shown in Figure 7, under the control of described motion control unit 6, with 1 gear unit 35 be connected in synchronously described accompany in the test-run a machine group accompanying the examination motor M 1, between the motor of M2 and 1 tested alternating current traction gearing, described unit of testing and controlling (not shown among Fig. 7) sends the traction instruction or the regenerative braking instruction accompanies 2 of the test-run a machine group to accompany examination current transformer (M1 to described, accompanying of M2 tries current transformer), send regenerative braking instruction or traction instruction traction convertor to described tested alternating current traction gearing, described accompany traction convertor that 2 of test-run a machine group accompany examination current transformer and described tested alternating current traction gearing according to described regenerative braking instruction or traction instruction make described when accompanying the examination motor to be in traction (promptly electronic) operating mode tested motor be in regenerative braking (generating) operating mode, and describedly accompany that tested motor is in traction (electronic) operating mode when trying motor and being in regenerative braking (promptly generating electricity) operating mode.So just can simulate the load characteristic of tested alternating current traction gearing, reach the purpose of alternating current traction gearing test at different operating conditions.
According to the difference of tested alternating current traction gearing power grade, power supply mode, quadruplet accompanies that the test-run a machine group is all or part of to link together by gear unit and tested alternating current traction gearing " back-to-back ".Accompany the test-run a machine group to adopt the multiple asynchronous motors combination, have good variable dirigibility, can satisfy the demand of dissimilar locomotives, the test of motor train unit alternating current traction kinematic train.
When testing, coordination control by unit of testing and controlling, make and testedly do the operation of traction (promptly electronic) operating mode with accompanying examination one group of two units, another group is done regenerative braking (i.e. generating) operating mode operation, just can simulate the load characteristic of tested alternating current traction gearing, reach the purpose of alternating current traction gearing test at different operating conditions.In test, what be in the regenerative braking operating mode accompanies examination motor or tested machine operation in generating state, and the electricity that sends feeds back to the 25kV electrical network through current transformer, transformer, resupplies the unit that is in traction working condition and uses.Like this, testedly realize energy mutual feedback in the net side, so this pilot system can be saved electric energy greatly with accompanying the test-run a machine group.In addition, the capacity of single phase industrial frequence 25kV railway electrical network is quite big, and the energy of two cover units is presented mutually in the net side, thereby makes the whole test system have good stable.
The pilot system that the utility model provides than synchronous unit feedback-type pilot system have less energy consumption, hold facility few, can try advantages such as scope is wide, pilot project is complete, energy-conserving and environment-protective, possess good controlled test load characteristic, can satisfy the demand that railway locomotive, motor train unit alternating current traction kinematic train carry out various Work condition analogues tests.
Above-described embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is an embodiment of the present utility model; and be not used in and limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (9)
1. variable accompanying tried motor combination alternating current traction drive experiment system, it is characterized in that described system comprises:
Accompany the test-run a machine group, comprise a plurality of examination motors of accompanying;
A plurality of gear units, each described gear unit all are used for described power transmission of accompanying between test-run a machine group and the tested alternating current traction gearing;
Motion control unit is connected with described gear unit, is used for accompanying the test of test-run a machine group and tested alternating current traction gearing to make up according to described, calls corresponding described gear unit and is connected in described accompanying between test-run a machine group and the tested alternating current traction gearing.
2. the variable examination motor combination alternating current traction drive experiment system of accompanying as claimed in claim 1 is characterized in that, also comprises and accompanies the examination transformer, is connected in the railway electrical network and accompanies the test-run a machine group, is used to provide the electric energy of accompanying the test-run a machine group required.
The 3 variable examination motor combination alternating current traction drive experiment system of accompanying as claimed in claim 1 is characterized in that the described test-run a machine group of accompanying also comprises a plurality of examination current transformers of accompanying, and each is accompanied the examination current transformer to be connected to 1 and accompanies the examination motor.
The 4 variable examination motor combination alternating current traction drive experiment system of accompanying as claimed in claim 3, it is characterized in that, also comprise unit of testing and controlling, be connected in described a plurality of current transformer of accompanying examination current transformer and described tested alternating current traction gearing, being used to control described test-run a machine group and the tested alternating current traction gearing of accompanying provides tractive force and regenerative braking power mutually.
The 5 variable examination motor combination alternating current traction drive experiment system of accompanying as claimed in claim 3, it is characterized in that, described system also comprises: pressure regulator, described pressure regulator is connected between railway electrical network and the tested alternating current traction gearing, is used for modulation railway electric network source voltage and sends into tested alternating current traction gearing.
6. the variable examination motor combination alternating current traction drive experiment system of accompanying as claimed in claim 1, it is characterized in that, the described test-run a machine group of accompanying comprises that 4 are accompanied the examination motor, under the control of described motion control unit, every 1 motor of accompanying the examination motor to connect tested alternating current traction gearing respectively by 1 gear unit.
7. the variable examination motor combination alternating current traction drive experiment system of accompanying as claimed in claim 1, it is characterized in that, the described test-run a machine group of accompanying comprises that 4 are accompanied the examination motor, described 21 motors of accompanying the examination motor to be connected in tested alternating current traction gearing respectively by 1 gear unit of accompanying in the test-run a machine group under the control of described motion control unit.
8. the variable examination motor combination alternating current traction drive experiment system of accompanying as claimed in claim 1, it is characterized in that, the described test-run a machine group of accompanying comprises that 4 are accompanied the examination motor, wherein per 2 to accompany the examination motor be one group, accompanies the examination motor to be connected in 1 motor of tested alternating current traction gearing respectively by 1 gear unit for above-mentioned 2 groups under the control of described motion control unit.
9. the variable examination motor combination alternating current traction drive experiment system of accompanying as claimed in claim 1, it is characterized in that, the described test-run a machine group of accompanying comprises that 4 are accompanied the examination motor, under the control of described motion control unit, wherein accompany the examination motor to be connected in 1 motor of tested alternating current traction gearing by 1 gear unit for 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820124032U CN201373908Y (en) | 2008-11-28 | 2008-11-28 | Variable test-assistant motor unit AC traction transmission test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820124032U CN201373908Y (en) | 2008-11-28 | 2008-11-28 | Variable test-assistant motor unit AC traction transmission test system |
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| CN201373908Y true CN201373908Y (en) | 2009-12-30 |
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| CN200820124032U Expired - Lifetime CN201373908Y (en) | 2008-11-28 | 2008-11-28 | Variable test-assistant motor unit AC traction transmission test system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806855A (en) * | 2010-03-12 | 2010-08-18 | 株洲南车时代电气股份有限公司 | Test bench and test system of traction inverter |
| CN103529797A (en) * | 2013-10-21 | 2014-01-22 | 南车株洲电力机车研究所有限公司 | Method and system for transmitting control data |
| CN103901287A (en) * | 2012-12-24 | 2014-07-02 | 中国北车集团大同电力机车有限责任公司 | Electric locomotive auxiliary convertor block test system |
| CN105116260A (en) * | 2015-09-07 | 2015-12-02 | 西南交通大学 | Direct-current traction substation regenerative electric energy utilization test system |
| CN103529797B (en) * | 2013-10-21 | 2016-11-30 | 南车株洲电力机车研究所有限公司 | A kind of control data transmission method and system |
| CN106932203A (en) * | 2015-12-30 | 2017-07-07 | 南车株洲电力机车研究所有限公司 | A kind of full-year simulation system and method for electric vehicle electric drive system |
| CN110823589A (en) * | 2018-08-14 | 2020-02-21 | 株洲中车时代电气股份有限公司 | Reverse starting test method and device for traction system |
| CN113155446A (en) * | 2020-01-07 | 2021-07-23 | 株洲中车时代电气股份有限公司 | Test system and method for simulating disconnection or coupling disconnection of motor transmission end |
| CN114114013A (en) * | 2021-12-03 | 2022-03-01 | 上海煤科检测技术有限公司 | Feedback small-sized motor test platform |
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- 2008-11-28 CN CN200820124032U patent/CN201373908Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101806855B (en) * | 2010-03-12 | 2012-07-11 | 株洲南车时代电气股份有限公司 | Test bench and test system of traction inverter |
| CN101806855A (en) * | 2010-03-12 | 2010-08-18 | 株洲南车时代电气股份有限公司 | Test bench and test system of traction inverter |
| CN103901287A (en) * | 2012-12-24 | 2014-07-02 | 中国北车集团大同电力机车有限责任公司 | Electric locomotive auxiliary convertor block test system |
| CN103529797A (en) * | 2013-10-21 | 2014-01-22 | 南车株洲电力机车研究所有限公司 | Method and system for transmitting control data |
| CN103529797B (en) * | 2013-10-21 | 2016-11-30 | 南车株洲电力机车研究所有限公司 | A kind of control data transmission method and system |
| CN105116260B (en) * | 2015-09-07 | 2017-10-17 | 西南交通大学 | A kind of DC traction substation regenerative electric energy utilizes pilot system |
| CN105116260A (en) * | 2015-09-07 | 2015-12-02 | 西南交通大学 | Direct-current traction substation regenerative electric energy utilization test system |
| CN106932203B (en) * | 2015-12-30 | 2019-07-02 | 南车株洲电力机车研究所有限公司 | A kind of full-year simulation system and method for electric vehicle electric drive system |
| CN106932203A (en) * | 2015-12-30 | 2017-07-07 | 南车株洲电力机车研究所有限公司 | A kind of full-year simulation system and method for electric vehicle electric drive system |
| CN110823589A (en) * | 2018-08-14 | 2020-02-21 | 株洲中车时代电气股份有限公司 | Reverse starting test method and device for traction system |
| CN110823589B (en) * | 2018-08-14 | 2021-11-19 | 株洲中车时代电气股份有限公司 | Reverse starting test method and device for traction system |
| CN113155446A (en) * | 2020-01-07 | 2021-07-23 | 株洲中车时代电气股份有限公司 | Test system and method for simulating disconnection or coupling disconnection of motor transmission end |
| CN113155446B (en) * | 2020-01-07 | 2022-10-14 | 株洲中车时代电气股份有限公司 | Test system and method for simulating disconnection or coupling disconnection of motor transmission end |
| CN114114013A (en) * | 2021-12-03 | 2022-03-01 | 上海煤科检测技术有限公司 | Feedback small-sized motor test platform |
| CN114114013B (en) * | 2021-12-03 | 2024-04-09 | 上海煤科检测技术有限公司 | Feedback small motor test platform |
| RU2802239C1 (en) * | 2023-04-04 | 2023-08-23 | Федеральное государственное автономное образовательное учреждение высшего образования "Санкт-Петербургский государственный электротехнический университет "ЛЭТИ" им. В.И. Ульянова (Ленина)" | Electric traction drive test bench |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Li Inventor after: Ma Zhiwen Inventor after: Li Wei Inventor after: Tang Lei Inventor after: Zhao Zhen Inventor before: Zhang Li |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHANG LI TO: ZHANG LI MA ZHIWEN LI WEI TANG LEI ZHAO ZHEN |
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Owner name: LOCOMOTIVE + CAR RESEARCH INSTITUTE, CHINA ACADEMY Effective date: 20120718 |
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Effective date of registration: 20120718 Address after: 100081 Beijing city Haidian District Daliushu Road No. 2 Co-patentee after: Locomotive & Car Research Institute, China Academy of Railway Sciences Patentee after: China Academy of Railway Sciences Address before: 100081 Beijing city Haidian District Daliushu Road No. 2 Patentee before: Locomotive & Car Research Institute, China Academy of Railway Sciences |
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