CN203406660U - Charger system of rail vehicle and rail vehicle - Google Patents
Charger system of rail vehicle and rail vehicle Download PDFInfo
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- CN203406660U CN203406660U CN201320357866.9U CN201320357866U CN203406660U CN 203406660 U CN203406660 U CN 203406660U CN 201320357866 U CN201320357866 U CN 201320357866U CN 203406660 U CN203406660 U CN 203406660U
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Abstract
The utility model provides a rail charger system of a rail vehicle and a rail vehicle. The charger system of the rail vehicle comprises at least two groups of converter assemblies which are in parallel with each other, communication bus connection is used among the converter assemblies, at least one converter assembly can adjust its output current according to output currents of the other converter assemblies, so as to maintain the output currents of the converter assemblies to be consistent. The charger system of the rail vehicle and the rail vehicle can solve the problems of a large volume and the low intelligentized degree of a present charger, and reduce the volume of the charger and raise the intelligentized degree.
Description
Technical field
The utility model relates to Electrical Control Technology, relates in particular to a kind of rail vehicle charger system and rail vehicle.
Background technology
The operational system of rail vehicle mainly comprises trailer system and auxiliary system, and wherein auxiliary system is used to the auxiliary equipment power supply in rail vehicle, equipment such as air-conditioning, illumination, socket and ventilation blower.Charger is as the important component part in rail vehicle auxiliary system, and major function is to convert line voltage to direct current, is auxiliary equipment power supply and vehicle battery charging.Charger adopts high-frequency soft switch DC/DC converter conventionally, and its switching frequency is higher, and the ripple factor volume less, charger of output can be less.But along with the increase of charger power output, switching frequency can be restricted and reduce, and then caused ripple factor increase, the volume of output to increase.Therefore, the design of charger need to take into account the relation of switching frequency and ripple factor, volume and power output.
Existing charger adopts at least two DC/DC converters in parallel, and wherein the exportable lower power of each converter, therefore can adopt higher switching frequency to meet the demand that reduces ripple factor and volume.But in order to make to realize current-sharing operation between each converter, need to hardware detection control circuit be set in each converter for detection of the run signal of each converter, transfer of data between each converter and between converter and the vehicle control system of rail vehicle realizes by hardware circuit, make to have comprised in existing charger more hardware circuit, cause the volume of charger larger, and the hardware circuit connecting between each converter is more complicated, the function of externally carrying out information exchange is poor, and intelligent degree is lower.
Utility model content
The utility model provides a kind of rail vehicle charger system and rail vehicle, larger for solving existing charger volume, and the lower problem of intelligent degree, realizes and dwindles the volume of charger, and improve intelligent degree.
The utility model embodiment provides a kind of rail vehicle charger system, comprising:
At least two group rod changer assemblies, described in each, rod changer assembly is in parallel;
Described in each, between rod changer assembly, adopt communication bus to connect, described at least one, rod changer assembly regulates the output current of self according to the output current of rod changer assembly described in other each, so that output current of rod changer assembly is consistent described in each.
Rail vehicle charger system as above, described in each, rod changer assembly comprises: inverter main circuit, checkout equipment, control appliance and communication interface circuit;
The test side of described checkout equipment is connected with described inverter main circuit, and signal output part is connected with described control appliance, for detection of the output current of described inverter main circuit, and offers described control appliance as the output current of described rod changer assembly;
One end of described communication interface circuit is connected with described control appliance, the other end and other described in each communication interface circuit in rod changer assembly be connected, for the output current of the described inverter main circuit of self is sent to other each described in the control appliance of rod changer assembly, and receive other each described in the output current of inverter main circuit, and offer self described control appliance;
Described control appliance is connected with described inverter main circuit, for according to described communication interface circuit, receive other each described in the pulse signal of output current adjustment output of inverter main circuit, to regulate the output current of inverter main circuit described in self.
Rail vehicle charger system as above, described in each, rod changer assembly also comprises: signal condition device, analog to digital converter and signal isolator;
The input of described signal condition device is connected with the signal output part of described checkout equipment, the output of described signal condition device is connected with the input of described analog to digital converter, for the output current of described inverter main circuit is carried out to signal condition, and the signal after conditioning is offered to described analog to digital converter;
The output of described analog to digital converter is connected with the input of described control appliance, for converting the signal after described conditioning to digital quantity signal by analog signals, and described digital quantity signal is offered to described control appliance;
The input of described signal isolator is connected with the output of described control appliance, the output of described signal isolator is connected with the drive plate of switching device in described inverter main circuit, for the pulse signal of described control appliance output is carried out offering described drive plate after photoelectricity isolation, to control the switching frequency of described switching device.
Rail vehicle charger system as above, described checkout equipment comprises the first current sensor, described the first current sensor is arranged on the output of described inverter main circuit, for detection of the output current of described inverter main circuit, and offers described control appliance.
Rail vehicle charger system as above, described checkout equipment also comprises the second current sensor and voltage sensor;
Described the second current sensor is arranged on the former limit of the intermediate transformer of described inverter main circuit, for detection of the intermediate current of described inverter main circuit;
Described voltage sensor is arranged on the output of described inverter main circuit, for detection of the output voltage of described inverter main circuit;
Described control appliance is also connected with voltage sensor with described the second current sensor, for the duty ratio of described pulse signal being carried out to the adjusting of current inner loop proportional integral and the adjusting of outer voltage proportional integral according to described intermediate current, output current and output voltage.
Rail vehicle charger system as above, described communication bus is null modem cable.
Rail vehicle charger system as above, described control appliance is digital signal processor.
The utility model embodiment provides a kind of rail vehicle, comprises vehicle control system, also comprises rail vehicle charger system as above;
Described rail vehicle charger system is connected with described vehicle control system by vehicle communication network, for the operation information of described rail vehicle charger system and fault message are sent to described vehicle control system, and receive the control command that described vehicle control system sends.
The rail vehicle charger system that the utility model embodiment provides is by adopting at least two group rod changer assemblies, each rod changer assembly is in parallel, and between each rod changer assembly, adopt communication bus to connect, at least one rod changer assembly is according to the output current of the output current quick adjustment of other each rod changer assembly self, can solve existing charger owing to adopting hardware circuit communication to cause volume larger, and the lower problem of intelligent degree.The rail vehicle charger system that adopts the utility model embodiment to provide can dwindle the volume of the charger in rail vehicle, and the output ripple factor of charger is reduced, and good transient state and stable state current-sharing effect have been realized, the Redundancy Design that also has high reliability, make the information exchange functions of charger integral body powerful, improved intelligent degree.
Accompanying drawing explanation
The structural representation of the rail vehicle charger system that Fig. 1 provides for the utility model embodiment mono-;
The structural representation of the rod changer assembly in the rail vehicle charger system that Fig. 2 provides for the utility model embodiment mono-;
The structural representation of another rod changer assembly in the rail vehicle charger system that Fig. 3 provides for the utility model embodiment mono-;
The charger system that Fig. 4 provides for the utility model embodiment bis-and the syndeton schematic diagram of the vehicle control system in rail vehicle.
Embodiment
Embodiment mono-
The structural representation of the rail vehicle charger system that Fig. 1 provides for the utility model embodiment mono-, the structural representation of the rod changer assembly in the rail vehicle charger system that Fig. 2 provides for the utility model embodiment mono-, the structural representation of another rod changer assembly in the rail vehicle charger system that Fig. 3 provides for the utility model embodiment mono-.As shown in Figure 1 to Figure 3, rail vehicle charger system can comprise: at least two group rod changer assemblies, and each rod changer assembly is in parallel; Between each rod changer assembly, adopt communication bus to connect, at least one rod changer assembly regulates the output current of self according to the output current of other each rod changer assembly, so that the output current of each rod changer assembly is consistent.The input of each rod changer assembly is through main circuit break-make control assembly access line voltage, and the energy-storage units that output output direct current offers in rail vehicle charges.
The present embodiment be take two groups of rod changer assemblies as example describes the concrete structure of charger system, is referred to as the first rod changer assembly 1 and the second rod changer assembly 2, and these two groups of rod changer assemblies are in parallel, and the two can adopt identical circuit structure.Between the first rod changer assembly 1 and the second rod changer assembly 2, adopt communication bus to connect, realize the transmission of output current signal.In charger system running, one group of rod changer assembly that can arrange is wherein main frame, remaining is slave, for the present embodiment, the first rod changer assembly 1 can be set to main frame, the second rod changer assembly 2 is set to slave, start the first rod changer assembly 1 and according to the mode operation of setting, the second rod changer assembly 2 is by the output current of communication bus Real-time Obtaining the first rod changer assembly 1, and according to the output voltage of this output current adjustment self so that the output current of self and the first rod changer assembly 1 be consistent.Also the second rod changer assembly 2 can be set to main frame, the first rod changer assembly 1 is set to slave, or the two rotation all can as main frame in charger running.The present embodiment is only set to main frame with the first rod changer assembly 1, and the scheme that the second rod changer assembly 2 is set to slave describes.
Concrete, each rod changer assembly can comprise: inverter main circuit 31, checkout equipment 32, control appliance 33 and communication interface circuit 34, wherein, the test side of checkout equipment 32 is connected with inverter main circuit 31, signal output part is connected with control appliance 33, for detection of the output current of inverter main circuit 31, and offer control appliance 33 as the output current of rod changer assembly; One end of communication interface circuit 34 is connected with control appliance 33, communication interface circuit 34 in each rod changer assembly of the other end and other is connected, for the output current of the inverter main circuit of self 31 being sent to the control appliance 33 of other each rod changer assembly, and the output current that receives other each inverter main circuit 31, and offer self control appliance 33; Control appliance 33 is connected with inverter main circuit 31, for the pulse signal of the output current adjustment output of other each inverter main circuit 31 of receiving according to communication interface circuit 34, to regulate the output current of self inverter main circuit 31.
Inverter main circuit 31 wherein can be the conventional DC/DC transformer configuration of prior art, specifically comprise the inverter circuit, intermediate transformer and the rectification circuit that connect successively, wherein, inverter circuit adopts four switching devices to form full-bridge circuit, for example can adopt four insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, IGBT) to form full-bridge circuit.The input of inverter circuit is provided with LC filter circuit, for the spiking of filtering line voltage, makes inverter circuit receive stable direct-flow input signal, can also suppress the peak voltage that IGBT in inverter circuit produced in break-make moment.The output of inverter circuit is connected with the former limit of intermediate transformer, the secondary of intermediate transformer is connected with the input of rectification circuit, this rectification circuit forms full bridge rectifier by four diodes, specifically can adopt the full bridge rectifier of zero voltage switch, the output of this rectification circuit is connected with output LC filter circuit, distortion voltage in can filtering rectification circuit output dc voltage, keeps output voltage stabilization.
For the first rod changer assembly 1 that is set to main frame, the test side of checkout equipment 32 is wherein connected with inverter main circuit 31, specifically can comprise the first current sensor, the test side of this first current sensor is arranged on the output of inverter main circuit 31, also export the output of LC filter circuit, for detection of the output current of inverter main circuit 31, offer control appliance 33.And control appliance 33 is sent to communication interface circuit 34 by the output current of inverter main circuit 31, and by communication bus, send to the second rod changer assembly 2 that is set to slave.
For the second rod changer assembly 2 that is set to slave, communication interface circuit 34 wherein passes through the output current of communication bus Real-time Obtaining the first rod changer assembly 1, and offers the control appliance 33 of self.Control appliance 33 within a cycle of operation to the current value calculating mean value getting, and the difference between calculating mean value and self output current, then according to this difference, adjust the duty ratio of output pulse signal, to regulate the break-make frequency of IGBT, by adjusting the voltage of inverter main circuit 31 outputs, realize regulation output electric current.
It will be appreciated by persons skilled in the art that working as above-mentioned the second rod changer assembly 2 is main frame, when the first rod changer assembly 1 is slave, the scheme that still can provide with reference to above-described embodiment realizes.
Above-mentioned control appliance 33 can be the conventional controller of those skilled in the art, AVR single-chip microcomputer, ARM single-chip microcomputer or digital signal processor (Digital Signal Processor for example, be called for short DSP) etc., the present embodiment adopts DSP as control appliance 33, the good output of DSP, calculation process speed, duty ratio that can quick adjustment pulse signal, improves the current-sharing effect between each rod changer assembly in charger.
Above-mentioned communication bus can be null modem cable, corresponding, and communication interface circuit 34 is the interface circuit matching with null modem cable.Certainly, communication bus can be also the data/address bus of other type, controller local area network (Controller Area Network, be called for short CAN) bus etc. for example, the interface circuit of corresponding communication interface circuit 34 for matching with CAN bus.
The course of work of above-mentioned rail vehicle charger system is: first, charger system wherein one group of rod changer assembly is set to main frame, another group is slave, when system starts, main frame and slave start according to the output voltage of setting, wherein main frame is according to the constant voltage and current limiting state operation of setting, slave periodically reads the output current value of main frame by communication bus, and calculating mean value, then with the output current value calculation deviation value of slave self, according to this deviate regulation output voltage, until the output current value of self is less than the threshold value of adjustment, make two groups of rod changer assemblies in current-sharing running status.When a certain moment, the load of charger reduces rapidly, and two groups of rod changer assemblies regulate the output current of self, so that output voltage maintenance is constant; When load increases rapidly, because inverter main circuit has certain individual difference, the load current of a certain inverter main circuit can first reach setting threshold and carry out current inner loop adjusting, output voltage is reduced, another rod changer assembly is understood rapid regulation output electric current, with load sharing electric current, make the former exit current inner loop and regulate, keep rated voltage output.When wherein one group of rod changer assembly breaks down, another group power converter cells can independent operating, and keeps half volume output.
Above-described embodiment is by adopting at least two group rod changer assemblies, each rod changer assembly is in parallel, and between each rod changer assembly, adopt communication bus to connect, at least one rod changer assembly is according to the output current of the output current quick adjustment of other each rod changer assembly self, can solve existing charger owing to adopting hardware circuit communication to cause volume larger, and the lower problem of intelligent degree.The technical scheme that adopts the present embodiment to provide can be dwindled the volume of charger, and the output ripple factor of charger is reduced, and has realized good transient state and stable state current-sharing effect, also has the Redundancy Design of high reliability.The information exchange functions of charger integral body is powerful, has improved intelligent degree.And technique scheme can make switching device realize zero voltage switch in wide loading range, and can reach without duty-cycle loss, without secondary peak voltage texts.
On the basis of technique scheme, can increase the quantity of rod changer assembly in parallel, between each rod changer assembly, adopt communication bus to connect, a rod changer assembly receives the output current of other rod changer assembly, and regulate the output current that outputs current to each rod changer assembly of self to be consistent, make charger system realize current-sharing operation.And adopt a plurality of rod changer assemblies in parallel, can reduce the power output of each rod changer assembly, therefore can improve switching frequency, and then reduce the volume of ripple factor and charger.
In addition, each rod changer assembly can also comprise: signal condition device 35, analog to digital converter 36 and signal isolator 37.On the basis of technique scheme, signal condition device 35 and analog to digital converter 36 are arranged between checkout equipment 32 and control appliance 33, concrete, the input of signal condition device 35 is connected with the signal output part of checkout equipment 32, the output of signal condition device 35 is connected with the input of analog to digital converter 36, for the output current of inverter main circuit 31 is carried out to signal condition, and the signal after conditioning is offered to analog to digital converter 36.The output of analog to digital converter 36 is connected with the input of control appliance 33, for converting the signal after conditioning to digital quantity signal by analog signals, and this digital quantity signal is offered to control appliance 33, realized the analog signals that checkout equipment 32 is detected and carried out signal condition, and converted digital quantity signal to and carry out data processing for control appliance 33.Wherein, signal condition device 35 can adopt the devices such as signal amplifier conventional in prior art, filter, and the type selecting of each device can specifically be set according to the data processing speed of control appliance 33.
Inside at rod changer assembly, can also there is the function that internal feedback regulates, the present embodiment provides a kind of feasible scheme: above-mentioned checkout equipment 32 also comprises the second current sensor and voltage sensor, wherein, the second current sensor is arranged on the former limit of the intermediate transformer of inverter main circuit 31, for detection of the intermediate current of inverter main circuit 31.Voltage sensor is arranged on the output of inverter main circuit, for detection of the output voltage of inverter main circuit 31.Control appliance 33 is connected with voltage sensor with the second current sensor, for carry out the adjusting of current inner loop proportional integral and outer voltage proportional integral according to the duty ratio of the output current pulse signals of this intermediate current, output voltage and other rod changer assembly, regulate, using phase-shift control mode as control program, realize the pulse signal of output is regulated.Concrete proportional integral regulates algorithm according to the characteristic of inverter main circuit 31, specifically to be set by technical staff, can realize by the working procedure of setup control equipment 33.Technique scheme adopts electric current loop to regulate as interior ring, and Voltage loop regulates as outer shroud, forms tandem and controls, and has improved the fast response characteristic of system, has realized the current protecting function to transformer primary side electric current simultaneously.
On the basis of technique scheme, those skilled in the art can rule of thumb supplement increases temperature sensor, makes charger have temperature compensation function, to improve current-sharing effect.Output is increased the functions such as overload, output short circuit protection, overvoltage protection, low pressure alarming, maximum current limit in inverter main circuit, input is increased to the functions such as transient overvoltage protection, input overvoltage protection and under-voltage protection.In rod changer assembly, can also be provided with diagnostics interface, adopt RS485 communication mode that data are real-time transmitted to control appliance, and configuration software interface debugs, each operational factor can be set, and realize on-line debugging and diagnostic function.Such scheme can be arranged by technical staff corresponding checkout equipment in rod changer assembly, and the working procedure that designs control appliance is realized.
Embodiment bis-
The charger system that Fig. 4 provides for the utility model embodiment bis-and the syndeton schematic diagram of the vehicle control system in rail vehicle.As shown in Figure 4, rail vehicle can comprise vehicle control system, also comprises the rail vehicle charger system that above-described embodiment provides.
Rail vehicle charger system is connected with vehicle control system by vehicle communication network, specifically can be connected with the CANOPEN network of vehicle by dedicated gateway plate, for the operation information of rail vehicle charger system and fault message are sent to vehicle control system, can be presented in real time on bridge display operation equipment, and receive the control command that vehicle control system sends, or receive the control command of being sent by bridge display operation equipment by driver, carry out operation accordingly.
The rail vehicle that technique scheme provides, the charger control system that application the utility model embodiment provides, by adopting at least two group rod changer assemblies, each rod changer assembly is in parallel, and between each rod changer assembly, adopt communication bus to connect, at least one rod changer assembly is according to the output current of the output current quick adjustment of other each rod changer assembly self, can solve existing charger owing to adopting hardware circuit communication to cause volume larger, and the lower problem of intelligent degree.The technical scheme that adopts the present embodiment to provide can be dwindled the volume of charger, and the output ripple factor of charger is reduced, and has realized good transient state and stable state current-sharing effect, also has the Redundancy Design of high reliability.The information exchange functions of charger integral body is powerful, has improved intelligent degree.And, can make switching device realize zero voltage switch in wide loading range, and can reach without duty-cycle loss, without secondary peak voltage texts.
Finally it should be noted that: each embodiment, only in order to the technical solution of the utility model to be described, is not intended to limit above; Although the utility model is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (8)
1. a rail vehicle charger system, is characterized in that, comprising:
At least two group rod changer assemblies, described in each, rod changer assembly is in parallel;
Described in each, between rod changer assembly, adopt communication bus to connect, described at least one, rod changer assembly regulates the output current of self according to the output current of rod changer assembly described in other each, so that output current of rod changer assembly is consistent described in each.
2. rail vehicle charger system according to claim 1, is characterized in that, described in each, rod changer assembly comprises: inverter main circuit, checkout equipment, control appliance and communication interface circuit;
The test side of described checkout equipment is connected with described inverter main circuit, and signal output part is connected with described control appliance, for detection of the output current of described inverter main circuit, and offers described control appliance as the output current of described rod changer assembly;
One end of described communication interface circuit is connected with described control appliance, the other end and other described in each communication interface circuit in rod changer assembly be connected, for the output current of the described inverter main circuit of self is sent to other each described in the control appliance of rod changer assembly, and receive other each described in the output current of inverter main circuit, and offer self described control appliance;
Described control appliance is connected with described inverter main circuit, for according to described communication interface circuit, receive other each described in the pulse signal of output current adjustment output of inverter main circuit, to regulate the output current of inverter main circuit described in self.
3. rail vehicle charger system according to claim 2, is characterized in that, described in each, rod changer assembly also comprises: signal condition device, analog to digital converter and signal isolator;
The input of described signal condition device is connected with the signal output part of described checkout equipment, the output of described signal condition device is connected with the input of described analog to digital converter, for the output current of described inverter main circuit is carried out to signal condition, and the signal after conditioning is offered to described analog to digital converter;
The output of described analog to digital converter is connected with the input of described control appliance, for converting the signal after described conditioning to digital quantity signal by analog signals, and described digital quantity signal is offered to described control appliance;
The input of described signal isolator is connected with the output of described control appliance, the output of described signal isolator is connected with the drive plate of switching device in described inverter main circuit, for the pulse signal of described control appliance output is carried out offering described drive plate after photoelectricity isolation, to control the switching frequency of described switching device.
4. rail vehicle charger system according to claim 3, it is characterized in that, described checkout equipment comprises the first current sensor, described the first current sensor is arranged on the output of described inverter main circuit, for detection of the output current of described inverter main circuit, and offer described control appliance.
5. rail vehicle charger system according to claim 4, is characterized in that, described checkout equipment also comprises the second current sensor and voltage sensor;
Described the second current sensor is arranged on the former limit of the intermediate transformer of described inverter main circuit, for detection of the intermediate current of described inverter main circuit;
Described voltage sensor is arranged on the output of described inverter main circuit, for detection of the output voltage of described inverter main circuit;
Described control appliance is also connected with voltage sensor with described the second current sensor, for the duty ratio of described pulse signal being carried out to the adjusting of current inner loop proportional integral and the adjusting of outer voltage proportional integral according to described intermediate current, output current and output voltage.
6. rail vehicle charger system according to claim 5, is characterized in that, described communication bus is null modem cable.
7. rail vehicle charger system according to claim 6, is characterized in that, described control appliance is digital signal processor.
8. a rail vehicle, comprises vehicle control system, it is characterized in that, also comprises the rail vehicle charger system as described in claim 1-7 any one;
Described rail vehicle charger system is connected with described vehicle control system by vehicle communication network, for the operation information of described rail vehicle charger system and fault message are sent to described vehicle control system, and receive the control command that described vehicle control system sends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320357866.9U CN203406660U (en) | 2013-06-20 | 2013-06-20 | Charger system of rail vehicle and rail vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320357866.9U CN203406660U (en) | 2013-06-20 | 2013-06-20 | Charger system of rail vehicle and rail vehicle |
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| CN203406660U true CN203406660U (en) | 2014-01-22 |
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| CN201320357866.9U Expired - Fee Related CN203406660U (en) | 2013-06-20 | 2013-06-20 | Charger system of rail vehicle and rail vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242421A (en) * | 2013-06-20 | 2014-12-24 | 中国北车股份有限公司 | Railway vehicle charger system and railway vehicle |
| CN110949171A (en) * | 2019-12-13 | 2020-04-03 | 重庆国翰能源发展有限公司 | Voltage monitoring method and system and computer readable storage medium |
-
2013
- 2013-06-20 CN CN201320357866.9U patent/CN203406660U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242421A (en) * | 2013-06-20 | 2014-12-24 | 中国北车股份有限公司 | Railway vehicle charger system and railway vehicle |
| CN110949171A (en) * | 2019-12-13 | 2020-04-03 | 重庆国翰能源发展有限公司 | Voltage monitoring method and system and computer readable storage medium |
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Owner name: CHINA CNR CORPORATION LIMITED Free format text: FORMER OWNER: DALIAN ELECTRIC TRACTION RESEARCH + DEVELOPMENT CENTER OF CHINA NORTH LOCOMOTIVE CO., LTD. Effective date: 20140317 |
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Free format text: CORRECT: ADDRESS; FROM: 116022 DALIAN, LIAONING PROVINCE TO: 100078 FENGTAI, BEIJING |
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Effective date of registration: 20140317 Address after: 100078 Beijing Fengtai District city park is a district 15 building Patentee after: China CNR Corporation Limited Address before: 116022 Shahekou, Liaoning, China No. 51 The Strip Patentee before: Dalian Electric Traction Research & Development Center of China North Locomotive Co., Ltd. |
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| 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: 20140122 Termination date: 20200620 |