CN109624792A - A kind of EMU power supply unit - Google Patents
A kind of EMU power supply unit Download PDFInfo
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- CN109624792A CN109624792A CN201910085656.0A CN201910085656A CN109624792A CN 109624792 A CN109624792 A CN 109624792A CN 201910085656 A CN201910085656 A CN 201910085656A CN 109624792 A CN109624792 A CN 109624792A
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- 238000006243 chemical reaction Methods 0.000 claims description 21
- 230000009466 transformation Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 20
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C3/00—Electric locomotives or railcars
- B61C3/02—Electric locomotives or railcars with electric accumulators
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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
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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- Mechanical Engineering (AREA)
- Transportation (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application provides a kind of EMU power supply unit, it include: traction convertor, the power input of the traction convertor with power grid for being connected, first output end of the traction convertor with the driving traction electric machine of EMU for being connected, and the second output terminal of the traction convertor with the ac bus of EMU for being connected；The first end of two-way AC-DC converter, the two-way AC-DC converter is connected with the ac bus, and the second end of the two-way AC-DC converter is connected with battery group；DC-DC converter, the input terminal of the DC-DC converter are connected with the second end of the two-way AC-DC converter, and the output end of the DC-DC converter is connected with the first DC bus of EMU；Battery group, the power supply interface of the battery group is connected with the second DC bus in the second end of the two-way AC-DC converter and the traction convertor respectively, the rated output voltage of the battery group is DC635V, improves the utilization efficiency of battery group.
Description
Technical field
The present invention relates to electrical equipment technical fields, and in particular to a kind of EMU power supply unit.
Background technique
In the prior art, a kind of battery group, generally low tension battery group are usually provided only in traditional EMU,
The A-battery group is used to power for the low-tension supply equipment in EMU, to meet EMU in power grid without in electric situation
Emergency running under power, needs to add high tension battery group, this is resulted in EMU, and there are two types of battery groups for setting, just this to set
For meter mode, the utilization efficiency of the battery group of EMU is lower, how to provide the utilization efficiency of battery group, reduces and uses
Cost becomes those skilled in the art's one of the technical problems that are urgent to solve.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of EMU power supply unit, to improve the battery group in EMU
Utilization efficiency.
To achieve the above object, the embodiment of the present invention provides the following technical solutions:
A kind of EMU power supply unit, comprising:
Traction convertor, the power input of the traction convertor are used to be connected with power grid, the traction convertor
First output end with the driving traction electric machine of EMU for being connected, and the second output terminal of the traction convertor is used for and motor-car
The ac bus of group is connected；
The first end of two-way AC-DC converter, the two-way AC-DC converter is connected with the ac bus, institute
The second end for stating two-way AC-DC converter is connected with battery group；
DC-DC converter, the second end phase of the input terminal of the DC-DC converter and the two-way AC-DC converter
Even, the output end of the DC-DC converter is connected with the first DC bus of EMU；
Battery group, the power supply interface of the battery group respectively with the second end of the two-way AC-DC converter with
And the second DC bus in the traction convertor is connected, the rated output voltage of the battery group is DC635V.
Preferably, in above-mentioned EMU power supply unit, the traction convertor includes:
Unidirectional AC-DC converter；
The first DC-DC converter that input terminal is connected by second DC bus with the unidirectional AC-DC converter
With the second DC-DC converter；
Power input of the input terminal of the unidirectional AC-DC converter as the traction convertor, the first DC-
The output end of first output end of the output end of AC converter as the traction convertor, second DC-DC converter is made
For the second output terminal of the traction convertor.
Preferably, at least two-way configured with 1 in the two-way AC-DC converter in above-mentioned EMU power supply unit
Charging module, first end of the first end of the two-way charging module as the two-way AC-DC converter are described two-way to fill
Second end of the second end of electric module as the two-way AC-DC converter.
Preferably, in above-mentioned EMU power supply unit, 1 DC-DC modulus of conversion is at least configured in the DC-DC converter
Block, input terminal of the input terminal of the DC-DC conversion module as the DC-DC converter, the DC-DC conversion module it is defeated
Output end of the outlet as the DC-DC converter.
Preferably, in above-mentioned EMU power supply unit, the two-way charging module and the DC-DC conversion module one are a pair of
It answers, the second end of each two-way charging module is connected with the input terminal of corresponding DC-DC conversion module.
Preferably, in above-mentioned EMU power supply unit, the battery group is constituted by being no less than 1 piece of battery.
Preferably, the second direct current in above-mentioned EMU power supply unit, in the battery group and the traction convertor
Control switch is provided between bus.
Preferably, in above-mentioned EMU power supply unit, further includes:
Switch controller, for when detecting electric network fault, exporting the control for controlling the control switch closure
Signal.
Based on the above-mentioned technical proposal, above scheme provided in an embodiment of the present invention, when power grid normal work and traction electric machine
When can adopt electricity by power grid, power grid is provided with the ac bus of EMU for the traction electric machine via traction convertor and is exchanged
Electricity, power grid is as traction power source at this time, and uses power grid for the AC electric equipment power supply on ac bus, two-way friendship-
Direct current transducer provides electric energy by the ac bus, collected electric energy is converted to direct current, and be loaded into EMU
It is that the direct-flow electricity utilization apparatus of EMU is powered, also, when battery group needs to charge, can also be led on first DC bus
Crossing the two-way AC-DC converter is that the battery group charges.When grid cut-off or since other failures can not be by
When power grid acquires electric energy, the battery group is discharged, and is described first DC bus powered by DC-DC converter, and
It is ac bus power supply by the two-way AC-DC converter, at the same time, the battery group also discharges electric energy and arrives
On second DC bus of the traction convertor, to be traction electric machine power supply by the traction convertor, thus may be used
See, disclosed in the embodiment of the present application in technical solution, when power grid power supply trouble, the battery group is for the traction electricity
While machine provides electric energy, can also by direct-flow electricity utilization apparatus that ac bus and the first DC bus are the EMU and
AC electric equipment power supply, improves the utilization rate of battery group.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of EMU power supply unit disclosed in the embodiment of the present application；
Fig. 2 is a kind of structural schematic diagram of EMU power supply unit disclosed in another embodiment of the application；
Fig. 3 is a kind of operating condition schematic diagram of EMU power supply unit disclosed in another embodiment of the application；
Fig. 4 is a kind of operating condition schematic diagram of EMU power supply unit disclosed in another embodiment of the application；
Fig. 5 is a kind of operating condition schematic diagram of EMU power supply unit disclosed in another embodiment of the application；
Fig. 6 is a kind of operating condition schematic diagram of EMU power supply unit disclosed in another embodiment of the application；
Fig. 7 is a kind of operating condition schematic diagram of EMU power supply unit disclosed in another embodiment of the application.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It is directed to the problem that battery group utilization efficiency is low in the prior art, this application discloses a kind of EMU for Denso
It sets, referring to Fig. 1, the EMU power supply unit includes: traction convertor 100, two-way AC-DC converter 200, DC-DC turns
Parallel operation 300 and battery group 400；
For the power input of the traction convertor 100 for being connected with power grid, the first of the traction convertor 100 is defeated
Outlet with the driving traction electric machine of EMU for being connected, and the second output terminal of the traction convertor is for the friendship with EMU
Bus is flowed to be connected；When power grid has electricity, the traction convertor 100 adopts electricity by power grid, and collected electric energy is converted to motor-car
Electric energy needed for group, and export to the ac bus of traction electric machine and EMU, work as grid cut-off, electricity can not be collected by power grid
When energy, the DC bus (being denoted as the second DC bus) in the traction convertor 100 provides electric energy by the battery group, will
Alternating current needed for collected electric energy is converted to traction electric machine；
The first end of the two-way AC-DC converter 200 is connected with the ac bus of the EMU, described two-way
The second end of AC-DC converter 200 is connected with battery group 400, wherein is at least connected on the ac bus of the EMU
There are the AC electric equipments such as cooling blower, cooling pump, main air compressor machine and air-conditioner set；
The input terminal of the DC-DC converter 300 is connected with the second end of the two-way AC-DC converter 200, described
The output end of DC-DC converter 300 is connected with the first DC bus of EMU, the direct-flow electricity utilization apparatus of the EMU and institute
It states the first DC bus to be connected, direct current energy is acquired by first DC bus, in the present solution, the DC-DC converter
300 provide direct current by the output end of the two-way AC-DC converter 200, carry out DC-DC to collected direct current and turn
It changes, is converted into target direct current, for example, in the present solution, the DC voltage that the DC-DC converter 300 exports is
DC110V；
The power supply interface of the battery group 400 respectively with the second end of the two-way AC-DC converter 200 and institute
The second DC bus stated in traction convertor 100 is connected, and the battery group 400 is charged or put by the power supply interface
Electricity, specifically, the alternating voltage on the ac bus of EMU is AC380V, at this point, the two-way friendship-when power grid has electricity
Alternating voltage on ac bus is converted to direct current by direct current transducer 200, is charged for battery group 400, is worked as grid cut-off
When, the alternating voltage on the ac bus of EMU is 0, at this point, the battery group 400 is discharged, and passes through the two-way friendship-
Direct current transducer 200 is converted to alternating current and is discharged on the ac bus of the EMU.
As above scheme as it can be seen that disclosed in the above embodiments of the present application in technical solution, when power grid works normally and leads
When electricity can be adopted by power grid by drawing motor, ac bus of the power grid via traction convertor for the traction electric machine and EMU is provided
Alternating current, power grid is as traction power source at this time, and uses power grid for the AC electric equipment power supply on ac bus, two-way
AC-DC converter acquires electric energy by the ac bus, collected electric energy is converted to direct current, and be loaded into EMU
The first DC bus on, be that the direct-flow electricity utilization apparatus of EMU is powered, can also be with also, when battery group needs to charge
It is that the battery group charges by the two-way AC-DC converter.When grid cut-off or since other failures can not
When acquiring electric energy by power grid, the battery group is discharged, and is first DC bus confession by DC-DC converter 300
Electricity, and be ac bus power supply by the two-way AC-DC converter, at the same time, the battery group also discharges
On electric energy to the second DC bus of the traction convertor, to be traction electric machine power supply by the traction convertor,
It can be seen that, when power grid power supply trouble, the battery group is being described disclosed in the embodiment of the present application in technical solution
It can also be the direct current electricity consumption of the EMU by ac bus and the first DC bus while traction electric machine provides electric energy
Equipment and AC electric equipment power supply, improve the utilization rate of battery group.
In addition, referring to fig. 2, in technical solution disclosed in the above embodiments of the present application, the power supply unit can also include:
First control switch K1, the second control switch K2 and third control switch K3；
The first control switch K1 is arranged between the two-way AC-DC converter 200 and the ac bus, uses
In realizing the channel status between two-way AC-DC converter 200 and the ac bus, when the first control switch K1 is led
When logical, access between the two-way AC-DC converter 200 and the ac bus, when the first control switch K1 is disconnected
When, breaking between the two-way AC-DC converter 200 and the ac bus, no current transmits between the two；
Second control switch K2 setting the battery group 400 and the two-way AC-DC converter 200 it
Between；The second control switch K2 is for realizing the access between battery group 400 and the two-way AC-DC converter 200
State, when the second control switch K2 conducting, between the battery group 400 and the two-way AC-DC converter 200
Access, when the second control switch K2 is disconnected, between the battery group 400 and the two-way AC-DC converter 200
Open circuit, no current transmits between the two.Also, when the battery group 400 is full electric and without power output demand, described second
Control switch K2 is in an off state；In the present solution, the third control switch K3 for realizing when grid cut-off or due to
When other failures can not acquire electric energy by power grid, the battery group is discharged, and is described the by DC-DC converter 300
One is DC bus powered, and is ac bus power supply by the two-way AC-DC converter.
The battery group 400 is arranged in the third control switch K3 and second in the traction convertor 100 is straight
It flows between bus, the third control switch K3 is straight for realizing second in battery group 400 and the traction convertor 100
The channel status between bus is flowed, when third control switch K3 conducting, the battery group 400 and the traction current transformation
The output electric current of access between the second DC bus in device 100, the battery group 400 flows into the traction convertor 100
In the second DC bus be sent to driving traction electric machine after the traction convertor 100 is reverse into exchange, when described
It is breaking between the battery group 400 and the second DC bus of the traction convertor 100 when three control switch K3 are disconnected,
The output electric current of the battery group 400 can not flow into the second DC bus in the traction convertor 100, in this programme
In, the third control switch K3 for realizing when grid cut-off or due to other failures can not by power grid acquire electric energy when, it is right
The battery group is discharged, control the battery group discharge electric energy to the traction convertor the second DC bus
On, to be traction electric machine power supply by the traction convertor.
Disclosed in the embodiment of the present application in technical solution, for the ease of to the first control switch K1, the second control
Switch K2 and third control switch K3 are controlled, and a switch controller is also provided with, and the switch controller is used for
It exports to first control switch, the second control switch and third control switch and matches with the switching control instruction got
Control signal, the control signal is for controlling first control switch, the second control switch and third control switch
On state.
Specifically, in technical solution disclosed in the embodiment of the present application, in conjunction with Fig. 3-Fig. 7 to the specific of the switch controller
Course of work mode is specifically described, and the black arrow in Fig. 3-Fig. 7 indicates current direction:
Referring to Fig. 3, when power grid has electricity, the first control switch K1 and the second control switch K2 closure, control are controlled
The third control switch K3 is disconnected, at this point, described give driving traction electricity by power network current after the processing of traction convertor 100
Ac bus and the two-way AC-DC converter 200 on machine, EMU are powered；
It is shown in Figure 4, when grid cut-off, judge whether to get switching control instruction, if not, control described the
One control switch K1, the second control switch K2 and third control switch K3 are disconnected, at this time the EMU group emergency trailer system
Middle no current flows through；
When getting the switching control instruction, the command identification of the switching control instruction is judged, referring to Fig. 5, when
When the command identification of the switching control instruction is first identifier, the first control switch K1 and third control switch K3 is kept
It disconnects, the second control switch K2 is switched on state, at this time the electric current shape of the EMU group emergency trailer system
Condition are as follows: 400 release current of battery group, the electric current released flow into the DC-DC through the second control switch K2 and turn
Parallel operation 300 flows into first DC bus after the DC-DC converter 300 conversion；
The third control switch is kept when the command identification of the switching control instruction is second identifier referring to Fig. 6
K3 is disconnected, and the first control switch K1 and the second control switch K2 is switched on state, the EMU group is answered at this time
The current situation of anxious trailer system are as follows: 400 release current of battery group, the electric current released is through second control switch
K2 flows into the two-way AC-DC converter 200 and DC-DC converter 300,400 release current of battery group release
Electric current the ac bus of EMU is flowed into after the two-way AC-DC converter 200 is converted, the battery group 400 is released
Discharge stream, the electric current released flow into first DC bus after the DC-DC converter 300 conversion；
Referring to Fig. 7, when the command identification of the switching control instruction is that third identifies, by first control switch
K1, the second control switch K2 and third control switch K3 are switched on state.The EMU group emergency trailer system at this time
Current situation are as follows: 400 release current of battery group, the electric current released through the second control switch K2 flow into described in
Two-way AC-DC converter 200, DC-DC converter 300 and the traction convertor 100, the battery group 400 discharge electricity
Stream, the electric current released flow into the ac bus of EMU, the electric power storage after the two-way AC-DC converter 200 is converted
400 release current of pond group, the electric current released flow into first DC bus, institute after the DC-DC converter 300 conversion
400 release current of battery group is stated, the electric current released is after the traction convertor 100 conversion to the driving traction electric machine
Power supply.
In the present solution, can be by the switching control instruction to the first control switch K1, the second control switch
K2 and third control switch K3 carries out whole control.
It is directed to whole the case where controlling, multiple operation keys can be configured on the switch controller, each operation be opened
Pass directly controls first control switch, the second control switch and third control switch and enters a specific operating mode,
For example, the first Operation switch can directly control first control switch and third control switch disconnects, described second is controlled
Switch-turn-ON states processed；Second Operation switch can control the third control switch and disconnect, first control switch
With the second control switch on state, the third Operation switch can directly control the first control switch, the second control switch
On state is switched to third control switch.
In addition to being controlled using the switching control instruction the first control switch K1, the second control switch K2 and third
Switch K3 is carried out except whole control, and the switch controller can also be realized through the switching control instruction to described first
Control switch K1, the second control switch K2 and third control switch K3 are controlled respectively.At this point, the switch control implement body
For:
When power grid has electricity, the first control switch K1 and the second control switch K2 closure is controlled, the third is controlled
Control switch K3 is disconnected；
When grid cut-off, judge whether to get switching control instruction, if not, control first control switch
K1, the second control switch K2 and third control switch K3 are disconnected；When getting the switching control instruction, the switch is determined
Control switch corresponding to control instruction, and control corresponding control switch according to the switching control instruction and be turned on or off.
It is directed to the case where controlling respectively, multiple operation keys, each operation key can be configured on the switch controller
It can control first control switch, for example, the first operation key is used to control the on state of the first control switch K1,
Second operation key is used to control the on state of the second control switch K2, and third operation key is for controlling the third control
The on state of switch K3.
Disclosed in the above embodiments of the present application in technical solution, the specific structure of the traction convertor 100 can be according to
According to user demand sets itself, for example, with reference to Fig. 3-7, disclosed in the embodiment of the present application in technical solution, the traction current transformation
Device 100 can be made of unidirectional AC-DC converter 0, the first DC-DC converter 110 and the second DC-DC converter 120, wherein
The input terminal of first DC-DC converter 110 and the second DC-DC converter 120 by second DC bus with it is described
Unidirectional AC-DC converter 0 is connected, and one end that second DC bus connects with unidirectional AC-DC converter 0 is as the traction
The power input of current transformer 100, the output end of first DC-DC converter 110 as the traction convertor 100
One output end, second output terminal of the output end of second DC-DC converter 120 as the traction convertor 100.Its
In, first DC-DC converter 110 is used to be converted in the direct current on second DC bus adaptation driving traction electricity
The alternating current of machine, second DC-DC converter 120 are used to being converted to the direct current on second DC bus into adaptation institute
State the alternating current of the machine of ac bus.
Disclosed in the embodiment of the present application in technical solution, 1 is at least configured in the two-way AC-DC converter 200
A two-way charging module, first end of the first end of the two-way charging module as the two-way AC-DC converter 200,
Second end of the second end of the two-way charging module as the two-way AC-DC converter 200, the two-way charging module
It can be two-way AC-DC converter, for example, the two-way AC-DC converter 200 is by two two-way AC-DC in Fig. 3-Fig. 7
Converter is constituted.
Disclosed in the embodiment of the present application in technical solution, 1 DC-DC is at least configured in the DC-DC converter 300
Conversion module, for example, see Fig. 2, the DC-DC converter 300 is made of two DC-DC conversion modules, the DC-DC conversion
Input terminal of the input terminal of module as the DC-DC converter 300, described in the output end of the DC-DC conversion module is used as
The output end of DC-DC converter 300.
The quantity of the two-way charging module configured in the two-way AC-DC converter 200 can be converted with the DC-DC
The quantity of the DC-DC conversion module configured in device 300 is identical, at this point, between the charging module and the DC-DC conversion module
It corresponds, the second end of each charging module is connected with the input terminal of corresponding DC-DC conversion module.
About battery group, the battery group 400 can be constituted by being no less than 1 piece of battery, and the battery can be with
For lithium battery or other kinds of energy-storage battery.
Further, disclosed in the embodiment of the present application in technical solution, in order to charge to the battery group,
In technical solution disclosed in the embodiment of the present application, it is also provided with photovoltaic solar power supply system, the photovoltaic solar supplies
Solar panels in electric system can be set on the top of EMU or side wall, can be by the photovoltaic solar system
The battery group charges, specifically, can control the charge and discharge mode of the battery group by controller, has
Body, the controller can be used for: judge whether the battery group needs to charge by the voltage of the battery group, such as
Whether fruit is to judge the voltage value of the battery group less than the first preset value, if so, at this time if power grid powers off suddenly,
The storage electric energy being likely to result in the battery group not enough uses, and needs to carry out quick charge to the battery group, because
It is simultaneously that the battery group charges that this, which controls the two-way AC-DC converter 200 and solar recharging system, until
When the voltage of the battery group reaches the second preset value, when the voltage of the battery group be greater than or equal to the second preset value and
It is described by solar recharging system when battery group needs to charge, and when carving solar recharging system and having power output
Battery charging continues to control the two-way AC-DC converter 200 if solar recharging system is without power output
It is simultaneously that the battery group charges with solar recharging system.
Disclosed in the embodiment of the present application in technical solution, the rated output voltage of the battery group 400 can foundation
User demand sets itself, such as disclosed in the embodiment of the present application in technical solution, the rated output of the battery group 400
Voltage, for example, can be 635V.
Disclosed in the embodiment of the present application in technical solution, in order to prevent power grid can normal power supply when, the battery
The electric energy of group is transferred to the traction convertor 100, in above scheme, the battery group 400 and the traction convertor 100
In the second DC bus between control switch can be set.The control mode of the control switch, which can choose, to be manually controlled
Also it can choose automatic control, at this point, being also provided with switch controller in above-mentioned apparatus, be used to detect power grid event
When barrier, the control signal for controlling the control switch closure is exported.
Further, referring to Fig. 3-Fig. 7, the voltage reversal on the first DC bus charges in order to prevent, in above scheme
Diode D is additionally provided between the output end of the DC-DC converter 300 and the first DC bus of EMU.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (7)
1. a kind of EMU power supply unit characterized by comprising
Traction convertor, the power input of the traction convertor with power grid for being connected, and the first of the traction convertor
For being connected with the driving traction electric machine of EMU, the second output terminal of the traction convertor is used for and EMU output end
Ac bus is connected；
The first end of two-way AC-DC converter, the two-way AC-DC converter is connected with the ac bus, described double
It is connected to the second end of AC-DC converter with battery group；
DC-DC converter, the input terminal of the DC-DC converter are connected with the second end of the two-way AC-DC converter, institute
The output end for stating DC-DC converter is connected with the first DC bus of EMU；
Battery group, the power supply interface of the battery group respectively with the second end of the two-way AC-DC converter and institute
The second DC bus stated in traction convertor is connected, and the rated output voltage of the battery group is DC635V.
2. EMU power supply unit according to claim 1, which is characterized in that the traction convertor includes:
Unidirectional AC-DC converter；
The first DC-DC converter and that input terminal is connected by second DC bus with the unidirectional AC-DC converter
Two DC-DC converters；
Power input of the input terminal of the unidirectional AC-DC converter as the traction convertor, the first DC-AC turn
First output end of the output end of parallel operation as the traction convertor, the output end of second DC-DC converter is as institute
State the second output terminal of traction convertor.
3. EMU power supply unit according to claim 1, which is characterized in that in the two-way AC-DC converter extremely
Be configured with 1 two-way charging module less, the first end of the two-way charging module as the two-way AC-DC converter the
One end, second end of the second end of the two-way charging module as the two-way AC-DC converter.
4. EMU power supply unit according to claim 3, which is characterized in that at least configured in the DC-DC converter
There is 1 DC-DC conversion module, input terminal of the input terminal of the DC-DC conversion module as the DC-DC converter is described
Output end of the output end of DC-DC conversion module as the DC-DC converter.
5. EMU power supply unit according to claim 4, which is characterized in that the two-way charging module and the DC-
DC conversion module corresponds, and the second end of each two-way charging module is connected with the input terminal of corresponding DC-DC conversion module.
6. EMU power supply unit according to claim 1, which is characterized in that the battery group and the traction current transformation
Control switch is provided between the second DC bus in device.
7. EMU power supply unit according to claim 6, which is characterized in that further include:
Switch controller, for when detecting electric network fault, exporting the control signal for controlling the control switch closure.
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Inventor after: Shen Di Inventor after: Ha Dalei Inventor after: Ma Kai Inventor after: Wang Zhi Inventor after: Wu Nan Inventor before: Ma Kai Inventor before: Shen Di Inventor before: Ha Dalei Inventor before: Wang Zhi Inventor before: Wu Nan |