CN112751337B - Energy absorption device for double-flow vehicle manufacturing - Google Patents
Energy absorption device for double-flow vehicle manufacturing Download PDFInfo
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- CN112751337B CN112751337B CN202011592948.2A CN202011592948A CN112751337B CN 112751337 B CN112751337 B CN 112751337B CN 202011592948 A CN202011592948 A CN 202011592948A CN 112751337 B CN112751337 B CN 112751337B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2200/00—Type of vehicles
- B60L2200/26—Rail vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to an energy absorption device for a double-current vehicle manufacturing, which comprises a first voltage output device and a second voltage output device, wherein the first voltage output device is connected with the second voltage output device; the output end of the first voltage output device is connected with a voltage comparator; the output end of the voltage comparator is connected with a rectifier; the output end of the rectifier is connected with an energy absorption resistor; the output end of the second voltage output device is connected with a three-phase to single-phase converter; the energy absorption device is also provided with a transformer; the output end of the transformer is connected with the rectifier; the output end of the transformer is also provided with a voltage transformation joint; the output end of the voltage transformation joint is connected with the input end of the voltage comparator. Its advantages are: when a vehicle brakes, energy generated by the return line on a contact network is reduced in voltage through the transformer and then is transmitted to the energy absorption resistor through the rectifier to be absorbed, so that the current is effectively prevented from being fed back to the power grid through the return line, the power consumption requirement of the power grid is met, and the safety is good.
Description
Technical Field
The invention relates to the technical field of railway vehicles, in particular to an energy absorption device for a double-flow vehicle.
Background
With the development of urban and rural construction, a fast channel for connecting a central city and a suburban city is urgently needed to be established, the urban rail transit category is continuously expanded, and the fast channel is used for connecting the central city and a satellite city and connecting urban railways between the satellite cities. At present, the AC25kV is successfully applied to a high-speed railway, the technology reaches the international leading level, and the integration on the same train can meet the requirements of both direct current power supply and alternating current power supply. However, the dual-flow vehicle in the prior art has the following defects and shortcomings:
firstly, in the double-current system vehicle in the prior art, after a return line is grounded, a loop is formed between the return line and a contact network, and after the vehicle is started, a part of current feeds back power to a power grid through the return line, so that energy is generated. This does not meet the power requirements of the grid and presents safety issues.
Chinese patent document CN201910841861.5, application date 20190906, with patent names: a double-current system vehicle alternating current-direct current switching high-voltage system is disclosed, and comprises an alternating current-direct current pantograph, a network voltage transformer and a vacuum circuit breaker, wherein the network voltage transformer identifies the alternating current-direct current pantograph to receive alternating current or direct current according to the monitored voltage amplitude and frequency, and the vacuum circuit breaker is a main switch for switching on or off a power supply; the system also comprises an alternating current circuit, a direct current circuit, an alternating current-direct current conversion switch and a lightning arrester.
In the ac/dc switching high-voltage system for a dual-current vehicle disclosed in the above patent document, a traction transformer and a traction converter are connected to a power supply output terminal of the system. The alternating current and direct current switching system integrates the alternating current circuit and the direct current circuit, and circuit protection devices are designed in the main circuit, the alternating current circuit and the direct current circuit, so that the over-current protection is realized in the alternating current and direct current power supply switching process, and the safety is improved; meanwhile, the pantograph, the network voltage transformer, the vacuum circuit breaker, the traction converter and the traction motor of the system are all shared devices, so that the manufacturing cost and the use cost are greatly saved. However, a technical scheme that has an energy absorption function and meets the power utilization requirement of a power grid when a vehicle is braked is not disclosed correspondingly.
In summary, there is a need for an energy absorption device having an energy absorption function and meeting the power requirement of the power grid when the vehicle is braked. No report is made about such energy absorbing devices.
Disclosure of Invention
The invention aims to provide an energy absorption device which has an energy absorption function and meets the power consumption requirement of a power grid when a vehicle is braked, aiming at the defects in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
an energy absorption device for a double-flow vehicle manufacturing comprises a first voltage output device and a second voltage output device; the output end of the first voltage output device is connected with a voltage comparator; the output end of the voltage comparator is connected with a rectifier; the output end of the rectifier is connected with an energy absorption resistor; a voltage transformer is arranged between the voltage comparator and the first voltage output device; the output end of the second voltage output device is connected with a three-phase to single-phase converter; a return line is led out from one end of the three-phase to single-phase converter, and the other end of the three-phase to single-phase converter is directly connected with a contact network; the far end of the return line is connected with a walking rail; the energy absorption device is also provided with a transformer; the input end of the transformer is connected with a contact network, and the output end of the transformer is connected with the rectifier; the output end of the transformer is also provided with a voltage transformation joint; the output end of the voltage transformation joint is connected with the input end of the voltage comparator.
As a preferred technical scheme, a loop is formed among the return line, the traveling rail, the overhead line system and the transformer.
As a preferable technical solution, a circuit breaker, a current transformer and a second voltage measuring device are sequentially arranged between the second voltage output device and the three-phase to single-phase converter.
As a preferable technical scheme, a first voltage measuring device and a lightning arrester are sequentially arranged between the first voltage output device and the voltage transformer.
As a preferable technical solution, a first isolation transformer, a second isolation transformer and a balance compensation device are arranged inside the three-phase to single-phase converter; the first isolation transformer, the second isolation transformer and the balance compensation device are sequentially connected in series; the second isolator is connected with the return line; the first isolator is connected with a contact net.
As a preferable technical scheme, the transformation ratio coefficient of the transformer is inversely proportional to the transformation ratio coefficient of the transformation joint.
As a preferred technical scheme, the first voltage output device is subjected to voltage reduction by a voltage transformer, then is conveyed to a voltage comparator, and forms a power supply voltage which is preset in the voltage comparator; the second voltage output device transmits voltage to a contact network through a three-phase-to-single-phase converter, the contact network is connected with a vehicle, when the vehicle is braked during running on a rail, a transformer reduces the voltage according to the working condition voltage of the contact network and transmits the reduced voltage energy to a rectifier, a voltage transformation joint arranged on the transformer measures the working condition voltage of the contact network according to a transformation ratio coefficient and transmits the working condition voltage to a voltage comparator, when the working condition voltage is greater than the power supply voltage, the voltage comparator generates a signal to transmit the signal to the rectifier, and the rectifier starts starting after receiving the signal, so that the energy transmitted from the transformer is transmitted to an energy absorption resistor.
As a preferred technical scheme, when the vehicle stops on the traveling rail, the voltage on the overhead line system is reduced through the transformer, the voltage obtained after the voltage transformation joint measurement is equal to the power supply voltage, no signal is transmitted to the rectifier by the voltage comparator, and the rectifier is in a closed state.
The invention has the advantages that:
according to the energy absorption device for the double-current brake vehicle, when the vehicle brakes, energy generated by a return line on a contact network is reduced by the transformer and then is transmitted to the energy absorption resistor through the rectifier to be absorbed, so that the current is effectively prevented from feeding back power to a power grid through the return line, the power consumption requirement of the power grid is met, and the safety is good.
Drawings
FIG. 1 is a schematic structural diagram of an energy absorption device for a dual flow vehicle according to the present invention;
fig. 2 is a schematic diagram of the internal structure of the three-phase to single-phase converter of the present invention.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings.
The reference numerals and components referred to in the drawings are as follows:
1. first voltage output device 11, first voltage measuring device
12. Arrester 13, voltage transformer
2. Second voltage output device 21 breaker
22. Second Voltage measuring device 23 Current Transformer
2. Voltage comparator 3 rectifier
4. Energy-absorbing resistor 5. three-phase to single-phase converter
51. First isolation transformer 52, second isolation transformer
53. Balance compensation device 6. return line
7. Contact net 8. walking rail
81. Vehicle 9. transformer
91. Variable-voltage connector
Referring to fig. 1, fig. 1 is a schematic structural diagram of an energy absorption device for a dual-flow vehicle according to the present invention. An energy absorbing device for a dual flow vehicle; the energy absorption device comprises a first voltage output device 1 and a second voltage output device 2; the output end of the first voltage output device 1 is connected with a voltage comparator 2; the output end of the voltage comparator 2 is connected with a rectifier 3; the output end of the rectifier 3 is connected with an energy-absorbing resistor 4; a voltage transformer 13 is arranged between the voltage comparator 2 and the first voltage output device 1; the output end of the second voltage output device 2 is connected with a three-phase to single-phase converter 5; a return line 6 is led out from one end of the three-phase to single-phase converter 5, and the other end of the three-phase to single-phase converter is directly connected with a contact net 7; the far end of the return line 6 is connected with a walking rail; the energy absorption device is also provided with a transformer 9; the input end of the transformer 9 is connected with the contact net 7, and the output end of the transformer 9 is connected with the rectifier 3; the output end of the transformer 9 is also provided with a voltage transformation joint 91; the output end of the voltage transformation connector 91 is connected with the input end of the voltage comparator 2.
A loop is formed among the return line 6, the walking rail 8, the contact net 7 and the transformer 9; the voltage on the contact net 7 is 27.5 KV; a circuit breaker 21, a current transformer 23 and a second voltage measuring device 22 are sequentially arranged between the second voltage output device 2 and the three-phase to single-phase converter 5. A first voltage measuring device 11 and a lightning arrester 12 are sequentially arranged between the first voltage output device 1 and the voltage transformer 13.
Referring to fig. 2, fig. 2 is a schematic diagram of an internal structure of a three-phase to single-phase converter 5 according to the present invention. A first isolation transformer 951, a second isolation transformer 952 and a balance compensation device 53 are arranged inside the three-phase to single-phase converter 5; the first isolation transformer 951, the second isolation transformer 952 and the balance compensation device 53 are sequentially connected in series; the second isolator is connected with a return line 6; the first isolator is connected with a contact net 7.
The embodiment needs to be explained as follows:
the transformation ratio coefficient of the transformer 9 is inversely proportional to the transformation ratio coefficient of the transformation joint 91; that is, assuming that when the operating voltage of the catenary 7 is slightly 28KV, the transformation ratio coefficient of the transformer 9 is 2:1, the voltage after voltage reduction of the transformer 9 is 14KV, and at this time, the transforming joint 91 outputs the voltage of 14KV as 28KV according to the transformation ratio coefficient of 1:2, which is equal to the operating voltage of the catenary 7, thereby realizing that the measured value of the operating voltage during braking is transmitted to the voltage comparator 2.
The first voltage output device 1 is subjected to voltage reduction by a voltage transformer 13, then is conveyed to a voltage comparator 2, and forms a power supply voltage which is preset in the voltage comparator 2; the second voltage output device 2 transmits voltage to a contact network 7 through a three-phase-to-single-phase converter 5, the contact network 7 is connected with a vehicle 81, when the vehicle 81 brakes on a traveling rail 8, a transformer 9 reduces the voltage according to the working condition voltage of the contact network 7 and transmits the reduced voltage energy to a rectifier 3, a voltage transformation joint 91 arranged on the transformer 9 measures the working condition voltage of the contact network 7 according to a transformation ratio coefficient and transmits the working condition voltage to a voltage comparator 2, when the working condition voltage is greater than the power supply voltage, the voltage comparator 2 generates a signal and transmits the signal to the rectifier 3, and the rectifier 3 starts after receiving the signal, so that the energy transmitted from the transformer 9 is transmitted to an energy-absorbing resistor 4.
When the vehicle 81 stops on the traveling rail 8, the voltage on the overhead line system 7 is reduced through the transformer 9, the voltage obtained after the measurement of the transformer joint 91 is equal to the power supply voltage, no signal is transmitted to the rectifier 3 by the voltage comparator 2, and the rectifier 3 is in a closed state.
The energy absorption device comprises a first voltage output device 1 and a second voltage output device 2, wherein the first voltage output device 1 substantially outputs power supply voltage to the voltage comparator 2 for preset storage; the voltage output by the second voltage output device 2 is substantially the working condition voltage.
The output end of the first voltage output device 1 is connected with a voltage comparator 2; the output end of the voltage comparator 2 is connected with a rectifier 3; the output end of the rectifier 3 is connected with an energy-absorbing resistor 4. The voltage comparator 2 is used for comparing the magnitude of the power voltage with the magnitude of the working condition voltage, so as to determine whether to generate a signal to turn on the rectifier 3. The rectifier 3 is used to convert the energy generated when the vehicle 81 is braked, either in the form of voltage or current. The energy-absorbing resistor 4 is used for storing energy, so that a part of current is prevented from feeding back power to the power grid through the return line 6, the power consumption requirement of the power grid is met, and the safety is good.
A voltage transformer 13 is arranged between the voltage comparator 2 and the first voltage output device 1; the output end of the second voltage output device 2 is connected with a three-phase to single-phase converter 5. The voltage transformer 13 is used for reducing voltage, and the safety of the power supply voltage in the input voltage comparison is ensured to be good. Similarly, the three-phase to single-phase converter 5 also functions to step down the voltage, thereby providing a safe voltage for the vehicle 81 on the running rail 8.
A return line 6 is led out from one end of the three-phase to single-phase converter 5, and the other end of the three-phase to single-phase converter is directly connected with a contact net 7; the far end of the return line 6 is connected with a running rail. Wherein, when return wire 6 connects contact net 7, be equivalent to the effect of connecting the live wire, when return wire 6 meets the walking rail 8, be equivalent to the ground connection effect, contact net 7 is equivalent to a operating mode power like this to provide power for vehicle 81.
The energy absorption device is also provided with a transformer 9; the input end of the transformer 9 is connected with the contact net 7, and the output end of the transformer 9 is connected with the rectifier 3; the output end of the transformer 9 is also provided with a voltage transformation joint 91; the output end of the voltage transformation connector 91 is connected with the input end of the voltage comparator 2. The effect of this design is: wherein, transformer 9 is used for reducing the operating mode voltage of contact net 7 to indirect absorption part energy. The transformer 91 is equivalent to a measuring device, which is equivalent to comparing the real-time voltage sensor of the working condition voltage of the vehicle 81.
A loop is formed among the return line 6, the walking rail 8, the contact net 7 and the transformer 9. The effect of this design is: this is equivalent to forming a safe and stable working condition power supply, and effectively avoiding electric power backflow by introducing the transformer 9.
A circuit breaker 21, a current transformer 23 and a second voltage measuring device 22 are sequentially arranged between the second voltage output device 2 and the three-phase to single-phase converter 5. The circuit breaker 21 has a protection function, can be opened or closed in real time, and is convenient to control. The current transformer 23 has a voltage reduction function for ensuring that the voltage in the circuit is a safe voltage. The second voltage measuring device 22 is used for visual display of the voltage.
A first voltage measuring device 11 and a lightning arrester 12 are sequentially arranged between the first voltage output device 1 and the voltage transformer 13. The voltage transformer 13 has a voltage reduction function, and the first measuring device is used for visually displaying voltage; the arrester 12 has a protective effect.
A first isolation transformer 951, a second isolation transformer 952 and a balance compensation device 53 are arranged inside the three-phase to single-phase converter 5; the first isolation transformer 951, the second isolation transformer 952 and the balance compensation device 53 are sequentially connected in series; the second isolator is connected with a return line 6; the first isolator is connected with a contact net 7. The equipment and personal safety can be protected, and meanwhile, harmful harmonic waves generated in a power grid are small; next, the primary side current is balanced by the balance compensation device 53.
According to the energy absorption device for the double-current brake vehicle, when the vehicle 81 brakes, energy generated by the return line 6 in the contact network 7 is reduced in voltage through the transformer 9 and then is transmitted to the energy absorption resistor 4 through the rectifier 3 to be absorbed, so that current is effectively prevented from feeding back power to a power grid through the return line 6, the power consumption requirement of the power grid is met, and the safety is good.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and additions can be made without departing from the method of the present invention, and these modifications and additions should also be regarded as the protection scope of the present invention.
Claims (8)
1. An energy absorption device for a double-flow vehicle manufacturing is characterized by comprising a first voltage output device and a second voltage output device; the output end of the first voltage output device is connected with a voltage comparator; the output end of the voltage comparator is connected with a rectifier; the output end of the rectifier is connected with an energy absorption resistor; a voltage transformer is arranged between the voltage comparator and the first voltage output device; the output end of the second voltage output device is connected with a three-phase to single-phase converter; a return line is led out from one end of the three-phase to single-phase converter, and the other end of the three-phase to single-phase converter is directly connected with a contact network; the far end of the return line is connected with a walking rail; the energy absorption device is also provided with a transformer; the input end of the transformer is connected with a contact network, and the output end of the transformer is connected with the rectifier; the output end of the transformer is also provided with a voltage transformation joint; the output end of the voltage transformation joint is connected with the input end of the voltage comparator.
2. The energy absorption device for the double-flow brake trolley according to claim 1, wherein a loop is formed among the return line, the traveling rail, the overhead line system and the transformer.
3. The energy absorption device for the dual-current brake system as claimed in claim 2, wherein a circuit breaker, a current transformer and a second voltage measuring device are sequentially arranged between the second voltage output device and the three-phase to single-phase converter.
4. The energy absorption device for the dual-flow vehicle as claimed in claim 1, wherein a first voltage measuring device and a lightning arrester are sequentially arranged between the first voltage output device and the voltage transformer.
5. The energy absorption device for the double-current braking system as claimed in claim 1, wherein a first isolation transformer, a second isolation transformer and a balance compensation device are arranged inside the three-phase to single-phase converter; the first isolation transformer, the second isolation transformer and the balance compensation device are sequentially connected in series; the second isolation transformer is connected with the return line; the first isolation transformer is connected with a contact network.
6. The energy absorber for a dual flow vehicle as claimed in claim 1, wherein the transformation ratio of the transformer is inversely proportional to the transformation ratio of the transformer taps.
7. The energy absorption device for the dual-current brake system as claimed in claim 1, wherein the first voltage output device is subjected to voltage reduction by the voltage transformer, then is conveyed to the voltage comparator, and forms a power supply voltage to be preset in the voltage comparator; the second voltage output device transmits voltage to a contact network through a three-phase-to-single-phase converter, the contact network is connected with a vehicle, when the vehicle is braked during running on a rail, a transformer reduces the voltage according to the working condition voltage of the contact network and transmits the reduced voltage energy to a rectifier, a voltage transformation joint arranged on the transformer measures the working condition voltage of the contact network according to a transformation ratio coefficient and transmits the working condition voltage to a voltage comparator, when the working condition voltage is greater than the power supply voltage, the voltage comparator generates a signal to transmit the signal to the rectifier, the rectifier starts after receiving the signal, and therefore the energy obtained after the transmission processing of the transformer is transmitted to an energy absorption resistor.
8. The energy absorption device for the dual-current brake vehicle as claimed in claim 7, wherein when the vehicle stops on the traveling rail, the voltage on the overhead line system is reduced by the transformer, and the voltage obtained after the measurement of the transformer terminal is equal to the power supply voltage, no signal is transmitted to the rectifier by the voltage comparator, and the rectifier is in a closed state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011592948.2A CN112751337B (en) | 2020-12-29 | 2020-12-29 | Energy absorption device for double-flow vehicle manufacturing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011592948.2A CN112751337B (en) | 2020-12-29 | 2020-12-29 | Energy absorption device for double-flow vehicle manufacturing |
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| CN112751337A CN112751337A (en) | 2021-05-04 |
| CN112751337B true CN112751337B (en) | 2022-04-26 |
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| CN101058296A (en) * | 2006-04-30 | 2007-10-24 | 湘潭市恒信电气有限公司 | Input judgement method and device for regeneration braking absorbing instrument |
| WO2012131141A1 (en) * | 2011-03-31 | 2012-10-04 | Administrador De Infraestructuras Ferroviarias (Adif) | System and method for controlling the charging of batteries from an electric rail system |
| CN103915857A (en) * | 2014-04-23 | 2014-07-09 | 青岛海能阿尔派轨道电力设备工程科技有限公司 | Regenerative braking energy feedback absorption utilization device of high voltage alternating current motor train unit |
| CN104467455A (en) * | 2014-12-04 | 2015-03-25 | 株洲南车时代电气股份有限公司 | Multi-system converter device |
| WO2015117921A1 (en) * | 2014-02-04 | 2015-08-13 | Siemens Aktiengesellschaft | Vehicle electrical system unit for a rail vehicle |
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2020
- 2020-12-29 CN CN202011592948.2A patent/CN112751337B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101058296A (en) * | 2006-04-30 | 2007-10-24 | 湘潭市恒信电气有限公司 | Input judgement method and device for regeneration braking absorbing instrument |
| WO2012131141A1 (en) * | 2011-03-31 | 2012-10-04 | Administrador De Infraestructuras Ferroviarias (Adif) | System and method for controlling the charging of batteries from an electric rail system |
| WO2015117921A1 (en) * | 2014-02-04 | 2015-08-13 | Siemens Aktiengesellschaft | Vehicle electrical system unit for a rail vehicle |
| CN103915857A (en) * | 2014-04-23 | 2014-07-09 | 青岛海能阿尔派轨道电力设备工程科技有限公司 | Regenerative braking energy feedback absorption utilization device of high voltage alternating current motor train unit |
| CN104467455A (en) * | 2014-12-04 | 2015-03-25 | 株洲南车时代电气股份有限公司 | Multi-system converter device |
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