CN106208640A - Secondary power system for city rail vehicle - Google Patents
Secondary power system for city rail vehicle Download PDFInfo
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- CN106208640A CN106208640A CN201510229572.1A CN201510229572A CN106208640A CN 106208640 A CN106208640 A CN 106208640A CN 201510229572 A CN201510229572 A CN 201510229572A CN 106208640 A CN106208640 A CN 106208640A
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- phase bridge
- charger
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- bridge circuit
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Abstract
The secondary power system for city rail vehicle that the embodiment of the present invention provides, including: charger, subordinate inverter and three phase bridge circuit, wherein, the input of three phase bridge circuit is connected with the power supply signal of contact net, the outfan of three phase bridge circuit is connected with the input of charger and the input of subordinate inverter respectively, the outfan of charger is connected with DC load equipment, and the outfan of subordinate inverter is connected with AC load equipment；Three phase bridge circuit, for being converted into high-frequency signal by power supply signal；Charger is powered for high-frequency signal is processed as DC load equipment；Subordinate inverter is powered for high-frequency signal is processed as AC load equipment.Avoid charger and subordinate inverter separate design, the contact net signal of telecommunication is processed respectively, thus reduce the volume and weight of secondary power system cabinet, cost-effective, it is simple to safeguard.
Description
Technical Field
The embodiment of the invention relates to the technical field of power circuits, in particular to an auxiliary power supply system for an urban rail vehicle.
Background
With the continuous improvement of urbanization level and the continuous development of traffic systems, urban rail vehicles have gradually become one of the main vehicles in large and medium-sized cities, and the auxiliary power supply system for the urban rail vehicles is used as the core component of the urban rail vehicles and is an indispensable important system component of the vehicles.
The auxiliary power supply system for the urban rail vehicle comprises an auxiliary inverter and a charger, wherein the two subsystems jointly form the auxiliary power supply system for the urban rail vehicle, and the auxiliary power supply system provides power for auxiliary equipment for the whole vehicle. In the prior art, an auxiliary inverter and a charger are separately designed, so that the whole system is complicated and the number of components is large.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, embodiments of the present invention provide an auxiliary power supply system for an urban rail vehicle.
One aspect of the present invention provides an auxiliary power supply system for an urban rail vehicle, including: charger, auxiliary inverter and three-phase bridge circuit, wherein,
the input end of the three-phase bridge circuit is connected with a power signal of a contact network, the output end of the three-phase bridge circuit is respectively connected with the input end of the charger and the input end of the auxiliary inverter, the output end of the charger is connected with direct current load equipment, and the output end of the auxiliary inverter is connected with alternating current load equipment;
the three-phase bridge circuit is used for converting the power supply signal into a high-frequency signal;
the charger is used for processing the high-frequency signal to supply power to the direct-current load equipment;
and the auxiliary inverter is used for processing the high-frequency signal to supply power to the alternating current load equipment.
In the auxiliary power supply system for the urban rail vehicle, the charger and the auxiliary inverter are respectively connected with the three-phase bridge circuit, the three-phase bridge circuit is shared to process the contact network signal and output a high-frequency signal, the charger processes the high-frequency signal to supply power to the direct-current load equipment, and the auxiliary inverter processes the high-frequency signal to supply power to the alternating-current load equipment. The separated design of the charger and the auxiliary inverter is avoided, and the electric signals of the contact network are respectively processed, so that the size and the weight of the auxiliary power system cabinet body are reduced, the cost is saved, and the maintenance is convenient.
Drawings
FIG. 1 is a schematic structural diagram of an auxiliary power supply system for an urban rail vehicle according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of another auxiliary power supply system for an urban rail vehicle according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of another auxiliary power supply system for an urban rail vehicle according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of yet another auxiliary power supply system for an urban rail vehicle according to an embodiment of the present invention;
fig. 5 is a circuit diagram of an auxiliary power supply system for an urban rail vehicle according to an embodiment of the invention.
Detailed Description
Fig. 1 is a schematic structural diagram of an auxiliary power supply system for an urban rail vehicle according to an embodiment of the present invention, and as shown in fig. 1, the auxiliary power supply system includes: charger 1, auxiliary inverter 2, three-phase bridge circuit 3, dc load device 4 and ac load device 5, wherein,
the input end of the three-phase bridge circuit 3 is connected with a power signal of a contact network, the output end of the three-phase bridge circuit 3 is respectively connected with the input end of the charger 1 and the input end of the auxiliary inverter 2, the output end of the charger 1 is connected with the direct current load device 4, and the output end of the auxiliary inverter 2 is connected with the alternating current load device 5.
The three-phase bridge circuit 3 is used for converting a power supply signal of the contact network into a high-frequency signal;
the charger 1 is used for processing the high-frequency signal and supplying power to the direct-current load equipment 4;
and the auxiliary inverter 2 is used for processing the high-frequency signal and supplying power to the alternating current load equipment 5.
Specifically, as shown in fig. 1, the charger 1 and the auxiliary inverter 2 commonly use the three-phase bridge circuit 3 to supply power to respective load devices, for the charger part, a power signal of a contact network is subjected to high-frequency conversion through the three-phase bridge circuit 3, and is converted into a high-frequency alternating current signal to be input into the charger 1, and the charger 1 performs signal processing on the high-frequency alternating current signal and then transmits the high-frequency alternating current signal to the direct current load device 4 of the vehicle to supply power to the direct current load device 4.
For the auxiliary inverter 2, a power supply signal of the overhead line system is subjected to high-frequency conversion through the three-phase bridge circuit 3, converted into a high-frequency alternating current signal, and input into the auxiliary inverter 2, and the auxiliary inverter 2 performs signal processing on the high-frequency alternating current signal and then transmits the high-frequency alternating current signal to the alternating current load device 5 of the vehicle to supply power to the alternating current load device 5.
In the auxiliary power supply system for the urban rail vehicle provided by the embodiment, the charger and the auxiliary inverter are respectively connected with the three-phase bridge circuit, the three-phase bridge circuit is shared to process the contact network signal and output a high-frequency signal, the charger processes the high-frequency signal to supply power to the direct-current load device, and the auxiliary inverter processes the high-frequency signal to supply power to the alternating-current load device. The separated design of the charger and the auxiliary inverter is avoided, and the electric signals of the contact network are respectively processed, so that the size and the weight of the auxiliary power system cabinet body are reduced, the cost is saved, and the maintenance is convenient.
Fig. 2 is a schematic structural diagram of another auxiliary power supply system for an urban rail vehicle according to an embodiment of the present invention, and as shown in fig. 2, based on the embodiment shown in fig. 1, the auxiliary power supply system further includes: the output end of the three-phase bridge circuit 3 is connected with the input end of the charger 1 through the first transformer 6, and the output end of the three-phase bridge circuit 3 is connected with the input end of the auxiliary inverter 2 through the second transformer 7; wherein,
and the first transformer 6 is used for electrically isolating the input end of the charger 1 from the direct current load equipment 4.
And a second transformer 7 for electrically isolating the input of the auxiliary inverter 2 from the ac load device 5.
In particular, the first transformer 6 effectively electrically isolates the input of the charger 1 from the dc load device 4. The second transformer 7 effectively electrically isolates the input of the auxiliary inverter 2 from the ac load device 5, thereby improving the safety and reliability of the device.
In the auxiliary power supply system for the urban rail vehicle, the charger and the auxiliary inverter are respectively connected with the three-phase bridge circuit through the transformer, the three-phase bridge circuit is shared to process the contact network signal and output a high-frequency signal, the charger processes the high-frequency signal to supply power to the direct-current load device, and the auxiliary inverter processes the high-frequency signal to supply power to the alternating-current load device. The separated design of the charger and the auxiliary inverter is avoided, and the electric signals of the contact network are respectively processed, so that the volume and the weight of the auxiliary power system cabinet body are reduced, the cost is saved, the maintenance is convenient, and the safety and the reliability of the system are improved.
Fig. 3 is a schematic structural diagram of another auxiliary power supply system for an urban rail vehicle according to an embodiment of the present invention, and as shown in fig. 3, based on the embodiment shown in fig. 1, the auxiliary power supply system further includes: a charging unit 8 and a control chip 9, wherein,
the input end of the three-phase bridge circuit 3 is connected with a power supply signal of a contact net through a charging unit 8, a control chip 9 is respectively connected with the charging unit 8 and the three-phase bridge circuit 3,
and the control chip 9 is used for controlling the on and off of the three-phase bridge circuit 3 according to the charging and discharging states of the charging unit 8.
Specifically, the circuit structure of the charging unit 8 can be designed as required, the operating principle is that components and parts are charged and discharged, the control chip 9 controls the on and off of the three-phase bridge circuit 3 by monitoring the charging and discharging states of the charging unit 8, soft switching control is achieved, the stability of output signals is good, and the response speed is high.
In the auxiliary power supply system for the urban rail vehicle provided by the embodiment, the charger and the auxiliary inverter are respectively connected with the three-phase bridge circuit, the three-phase bridge circuit is shared to process the contact network signal and output a high-frequency signal, the charger processes the high-frequency signal to supply power to the direct-current load device, and the auxiliary inverter processes the high-frequency signal to supply power to the alternating-current load device. The separated design of the charger and the auxiliary inverter is avoided, and the electric signals of the contact network are respectively processed, so that the size and the weight of the auxiliary power system cabinet body are reduced, the cost is saved, the maintenance is convenient, and the stability and the response speed of the signals are improved.
Fig. 4 is a schematic structural diagram of another auxiliary power supply system for an urban rail vehicle according to an embodiment of the present invention, and as shown in fig. 4, based on the embodiment shown in fig. 1, a charger 1 includes: current doubler circuit 11, rectifier circuit 12 and first filter circuit 13, auxiliary inverter 2 includes: a rectifier circuit 21, a second filter circuit 22 and an inverter unit 23 are cascaded, wherein,
the input end of the current doubling circuit 11 is connected with the output end of the three-phase bridge circuit 3, the output end of the current doubling circuit 11 is connected with the input end of the rectifying circuit 12, the output end of the rectifying circuit 12 is connected with the input end of the first filter circuit 13, and the output end of the first filter circuit 13 is connected with the direct-current load device 4.
The input end of the cascade rectification circuit 21 is connected with the output end of the three-phase bridge circuit 3, the output end of the cascade rectification circuit 21 is connected with the input end of the second filter circuit 22, the output end of the second filter circuit 22 is connected with the input end of the inversion unit 23, and the output end of the inversion unit 23 is connected with the alternating current load device 5.
Fig. 5 is a circuit diagram of an auxiliary power supply system for an urban rail vehicle according to an embodiment of the present invention, in this embodiment, an output end a of a first bridge arm of a three-phase bridge circuit 3 is connected to a first input end B of a charger 1 through a first transformer 6, an output end C of a second bridge arm is connected to a second input end D of the charger 1 through the first transformer 6 and is connected to a second input end E of an auxiliary inverter 2 through a second transformer 7, and an output end F of a third bridge arm is connected to a first input end G of the auxiliary inverter 2 through the second transformer 7. It should be noted that, according to actual application, the first bridge arm, the second bridge arm, or the third bridge arm may also be connected to the input end of the charger 1 or the input end of the auxiliary inverter 2 through a component such as a resistor or a capacitor. It should be noted that the current doubling circuit 11 in the embodiment shown in fig. 5 realizes current doubling through the secondary side of the first transformer 6. Fig. 5 does not show the control chip 9, only the charging unit 8 is shown, and the charging unit 8 and the control chip 9 cooperate to realize the soft switching function of the three-phase bridge circuit 3.
Referring to fig. 4 and 5, the charger 1 and the auxiliary inverter 2 commonly use the three-phase bridge circuit 3 to supply power to their respective load devices, for the charger part, a power signal of a contact network is subjected to high-frequency conversion by the three-phase bridge circuit 3, converted into a high-frequency alternating current signal, input into the charger 1, isolated and transformed by the first transformer 6, and then passes through the current doubling circuit 11, the current doubling circuit 11 sends the current-doubled electrical signal to the rectifying circuit 12, the rectifying circuit 12 rectifies the alternating current signal into a direct current signal, and sends the direct current signal to the first filtering circuit 13, and the direct current signal is finally sent to the direct current load devices 4 of the vehicle after being filtered by the first filtering circuit 13.
For the auxiliary inverter 2, a power supply signal of a contact network is subjected to high-frequency conversion through the three-phase bridge circuit 3, converted into a high-frequency alternating current signal, input into the auxiliary inverter 2, isolated and transformed by the second transformer 7, and then transmitted to the cascade rectification circuit 21, the cascade rectification circuit 21 rectifies the signal and transmits the signal to the second filter circuit 22, the second filter circuit 22 filters the signal RC and then transmits the signal to the inverter unit 23, and the inverter unit 23 converts direct current into 380V alternating current and provides the alternating current to the alternating current load device 5 of the vehicle.
In the auxiliary power supply system for the urban rail vehicle provided by the embodiment, the charger and the auxiliary inverter are respectively connected with the three-phase bridge circuit, the three-phase bridge circuit is shared to process the contact network signal and output a high-frequency signal, the charger processes the high-frequency signal to supply power to the direct-current load device, and the auxiliary inverter processes the high-frequency signal to supply power to the alternating-current load device. The separated design of the charger and the auxiliary inverter is avoided, and the electric signals of the contact network are respectively processed, so that the size and the weight of the auxiliary power supply system cabinet body are reduced, the cost is saved, the maintenance is convenient, the stability and the response speed of the signals are improved, and the safety and the reliability of the system are improved.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. An auxiliary power supply system for an urban rail vehicle, comprising: charger, auxiliary inverter and three-phase bridge circuit, wherein,
the input end of the three-phase bridge circuit is connected with a power signal of a contact network, the output end of the three-phase bridge circuit is respectively connected with the input end of the charger and the input end of the auxiliary inverter, the output end of the charger is connected with direct current load equipment, and the output end of the auxiliary inverter is connected with alternating current load equipment;
the three-phase bridge circuit is used for converting the power supply signal into a high-frequency signal;
the charger is used for processing the high-frequency signal to supply power to the direct-current load equipment;
and the auxiliary inverter is used for processing the high-frequency signal to supply power to the alternating current load equipment.
2. The auxiliary power supply system for urban rail vehicles according to claim 1, wherein the output terminal of the three-phase bridge circuit is connected to the input terminal of the charger and the input terminal of the auxiliary inverter, respectively, and comprises:
the output end of a first bridge arm in the three-phase bridge circuit is connected with the first input end of the charger, the output end of a second bridge arm in the three-phase bridge circuit is connected with the second input end of the charger and the second input end of the auxiliary inverter, and the output end of a third bridge arm in the three-phase bridge circuit is connected with the first input end of the auxiliary inverter.
3. The auxiliary power supply system for an urban rail vehicle according to claim 1, characterized in that said system further comprises: a first transformer for a first voltage to be supplied to the power supply,
the output end of the three-phase bridge circuit is connected with the input end of the charger through the first transformer;
the first transformer is used for electrically isolating the input end of the charger from the direct-current load equipment.
4. The auxiliary power supply system for an urban rail vehicle according to claim 1, characterized in that said system further comprises: a second transformer for transforming the first and second voltage signals,
the output end of the three-phase bridge circuit is connected with the input end of the auxiliary inverter through the second transformer;
the second transformer is used for electrically isolating the input end of the auxiliary inverter from the alternating current load equipment.
5. The auxiliary power supply system for an urban rail vehicle according to claim 1, characterized in that said system further comprises: a charging unit and a control chip, wherein the charging unit is connected with the control chip,
the input end of the three-phase bridge circuit is connected with a power supply signal of the contact network through the charging unit; the control chip is respectively connected with the charging unit and the three-phase bridge circuit,
and the control chip is used for controlling the on and off of the three-phase bridge circuit according to the charging and discharging states of the charging unit.
6. The auxiliary power supply system for urban rail vehicles according to any one of claims 1 to 5, wherein the charger comprises:
a current doubling circuit, a rectifying circuit and a filter circuit, wherein,
the input end of the current doubling circuit is connected with the output end of the three-phase bridge circuit, the output end of the current doubling circuit is connected with the input end of the rectifying circuit, the output end of the rectifying circuit is connected with the input end of the filter circuit, and the output end of the filter circuit is connected with the direct-current load equipment.
7. The auxiliary power supply system for an urban rail vehicle according to any one of claims 1 to 5, wherein the auxiliary inverter comprises:
a cascade rectification circuit, a filter circuit and an inversion unit, wherein,
the input end of the cascade rectification circuit is connected with the output end of the three-phase bridge circuit, the output end of the cascade rectification circuit is connected with the input end of the filter circuit, the output end of the filter circuit is connected with the input end of the inversion unit, and the output end of the inversion unit is connected with the alternating current load equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229572.1A CN106208640A (en) | 2015-05-07 | 2015-05-07 | Secondary power system for city rail vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510229572.1A CN106208640A (en) | 2015-05-07 | 2015-05-07 | Secondary power system for city rail vehicle |
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| CN106208640A true CN106208640A (en) | 2016-12-07 |
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| CN201510229572.1A Pending CN106208640A (en) | 2015-05-07 | 2015-05-07 | Secondary power system for city rail vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113650628A (en) * | 2021-09-03 | 2021-11-16 | 西安中车永电电气有限公司 | A decentralized power supply system for traction auxiliary power supply of intelligent travel electric vehicle units |
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