CN208439091U - The bidirectional charger of high-power high-efficiency for railcar - Google Patents
The bidirectional charger of high-power high-efficiency for railcar Download PDFInfo
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- CN208439091U CN208439091U CN201820599654.4U CN201820599654U CN208439091U CN 208439091 U CN208439091 U CN 208439091U CN 201820599654 U CN201820599654 U CN 201820599654U CN 208439091 U CN208439091 U CN 208439091U
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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
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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Abstract
The utility model discloses a kind of bidirectional chargers of high-power high-efficiency for railcar, by the way that a high-pressure side inverter bridge is arranged, and high frequency transformer and low-pressure side inverter bridge are designed to two-way, the IGBT module for solving great power bidirectional charger high-pressure side inverter bridge to a certain extent open cut-off loss it is larger, the excessive problem of low-pressure side electric current, and high input voltage voltage stabilization can be made to a lower value by designing a BUCK reduction voltage circuit in high-pressure side, influence high-pressure side inverter bridge will not by input voltage fluctuation.And by the way that the first, second high frequency transformer is designed as centre tap, and on-off is controlled by corresponding high voltage connector, realizes with the same high frequency transformer and solve the problems, such as that bidirectional charger low-pressure side voltage fluctuation range is big.Therefore, the utility model can satisfy the powerful requirement of subway power grid, and have the advantages that high efficiency is low-loss.
Description
Technical field
The utility model relates to a kind of bidirectional chargers, are specifically related to a kind of high-power high-efficiency for railcar
Bidirectional charger.
Background technique
Currently, during subway circulation, the problem of if there is power supply line, make subway that can not obtain electricity from power grid
Can, it will result in railcar and stop on the line, so that the operation of route can be seriously affected, while the feeling for taking and peace of passenger
Full problem also can be very big problem.
Accordingly, it would be desirable to realize by a kind of bidirectional charger and usually passing through subway power grid to battery charging；On ground
Iron car when something goes wrong, extracts energy from battery, is supplied to railcar running under power, railcar is allow to go for net
Platform is sailed to, passenger is evacuated or changed to.Since subway power grid is usually DC1500V or DC750V, the charge and discharge of battery are
The DC1500V decompression transformation of subway power grid is DC110V, it is desirable that the bidirectional charger used on railcar is big by DC110V
Capacity, must be as needed 70~100KW, still, and current charger is usually to apply on electric car, and capacity is smaller, only
Several KW, and be depressured by charger, several kilo-amperes times can be reached in the current peak of low-pressure side, there is a problem of that electric current is excessive,
It is lower to there is a problem of that excessive and efficiency is lost in inverter bridge in high-pressure side.
In addition, subway network voltage be not it is constant, usual variation range be 1800~1000V, and work as electric power storage tank discharge
When, voltage is also to be gradually reduced, and voltage change range is 130~80V, when being charged by bidirectional charger to battery,
Maximum voltage change ratio is that 1000/130=7.7 (when input is higher than 1000V, can carry out pulsewidth by high-pressure side inverter bridge
Adjust, reduce the pulsewidth opened, reduce the output voltage of high frequency transformer), when battery discharges to power grid, maximum voltage
Change ratio: 1000/80=12.5, and current bidirectional charger is unable to satisfy the voltage change range at this big both ends.
Summary of the invention
In order to solve the above-mentioned technical problem, the utility model proposes a kind of the double of high-power high-efficiency for railcar
To charger, the powerful requirement of subway power grid is met, high-pressure side inverter bridge is solved and is lost that larger and efficiency is lower, low pressure
The excessive problem of side electric current, and solve the problems, such as that bidirectional charger high-pressure side and low-pressure side voltage fluctuation range are big.
The technical solution of the utility model is achieved in that
A kind of bidirectional charger of the high-power high-efficiency for railcar, the main circuit topology of the bidirectional charger
Structure includes high-pressure side filter circuit, high-pressure side BUCK reduction voltage circuit, high-pressure side inverter bridge, current sharing inductor, the first high frequency transformation
Device, the first low-pressure side inverter bridge, the second high frequency transformer, the second low-pressure side inverter bridge and low-pressure side filter circuit, voltage change
High voltage direct current be connected with the DC terminal of the high-pressure side inverter bridge, the exchange end of the high-pressure side inverter bridge divides two-way to connect
It is connected to the high-pressure side of first high frequency transformer and the high-pressure side of second high frequency transformer, first high frequency transformer
Low-pressure side be connected with the end that exchanges of the first low-pressure side inverter bridge, the low-pressure side of second high frequency transformer with it is described
The exchange end of second low-pressure side inverter bridge is connected, and the DC terminal of the first low-pressure side inverter bridge and second low-pressure side are inverse
The DC terminal for becoming bridge is connected to the low-voltage DC of voltage change, the high-pressure side filter circuit, high-pressure side BUCK decompression
Circuit is all connected between the high voltage direct current and the high-pressure side inverter bridge, and the low-pressure side filter circuit is connected to described
Between low-voltage DC and the first low-pressure side inverter bridge and the second low-pressure side inverter bridge, the high-pressure side inverter bridge
It exchanges end and through the current sharing inductor is divided into two-way, be connected all the way with first high frequency transformer, another way and described second high
The high-pressure side of frequency power transformer is connected；First high frequency transformer high-pressure side has the first centre tap, and second high frequency becomes
Depressor has the second centre tap, and what the current sharing inductor separated connects between the high-pressure side of first high frequency transformer all the way
It is connected to the first high voltage connector, and first centre tap on the road and first high frequency transformer that the current sharing inductor separates
Between be connected with the second high voltage connector；The high-pressure side of another way and second high frequency transformer that the current sharing inductor separates
Between be connected with third high voltage connector, and the current sharing inductor separate the second of the road and second high frequency transformer in
Between be connected with the 4th high voltage connector between tap.
Further, the voltage change range of the low-voltage DC is DC130V~80V.
Further, to be connected with first between the exchange end of the high-pressure side inverter bridge and first high frequency transformer high
Side resonant capacitance is pressed, is connected with the second high-pressure side between the exchange end of the high-pressure side inverter bridge and second high frequency transformer
Resonant capacitance；The first low-pressure side is connected between the exchange end of the first low-pressure side inverter bridge and first high frequency transformer
Resonant capacitance is connected with the second low-pressure side between the exchange end of the second low-pressure side inverter bridge and second high frequency transformer
Resonant capacitance.
Further, the high-pressure side inverter bridge includes the first high-pressure side IGBT module and the second high-pressure side IGBT module,
First high-pressure side IGBT module include the first high-pressure side IGBT power tube and third high-pressure side IGBT power tube, described second
High-pressure side IGBT module includes the second high-pressure side IGBT power tube and the 4th high-pressure side IGBT power tube, the DC+ of high voltage direct current
It is connected with the collector of the collector of the first high-pressure side IGBT power tube and the second high-pressure side IGBT power tube, high voltage direct current
DC- is connected with the emitter of the emitter of third high-pressure side IGBT power tube and the 4th high-pressure side IGBT power tube, the first high pressure
The emitter of side IGBT power tube is connected with the collector of third high-pressure side IGBT power tube, the second high-pressure side IGBT power tube
Emitter is connected with the collector of the 4th high-pressure side IGBT power tube.
Further, the high-pressure side filter circuit is high-pressure side filter capacitor, and the high-pressure side filter capacitor is parallel to
Between the DC+ of high voltage direct current and the DC- of high voltage direct current.
Further, the high-pressure side BUCK reduction voltage circuit includes reduction voltage circuit IGBT power tube, freewheeling diode, energy storage
Inductance, reduction voltage circuit filter capacitor, collector and the high voltage direct current of the reduction voltage circuit IGBT power tube are electrically connected, described
The emitter of reduction voltage circuit IGBT power tube is connected with described energy storage inductor one end, the other end of the energy storage inductor and described the
The collector of one high-pressure side IGBT power tube is connected, and the negative pole end of the freewheeling diode is connected to the reduction voltage circuit IGBT function
Between the emitter of rate pipe and one end of the energy storage inductor, the positive terminal of the freewheeling diode is connected to high voltage direct current
DC-, reduction voltage circuit filter capacitor one end are connected to the other end and the first high-pressure side IGBT function of the energy storage inductor
Between the collector of rate pipe, the other end of the reduction voltage circuit filter capacitor is connected to the DC- of high voltage direct current.
Further, the emitter of the first high-pressure side IGBT power tube and the third high-pressure side IGBT power tube
The tie point of collector is connected after dividing two-way with first high frequency transformer and second high frequency transformer, and described second is high
Press the tie point of the emitter of side IGBT power tube and the collector of the 4th high-pressure side IGBT power tube divide after two-way with institute
It states the first high frequency transformer and second high frequency transformer is connected, the current sharing inductor is series at from second high-pressure side
In the two-way that the tie point of the emitter of IGBT power tube and the collector of the 4th high-pressure side IGBT power tube separates.
Further, the first low-pressure side inverter bridge includes the first low-pressure side IGBT module A and the second low-pressure side IGBT
Modules A, the first low-pressure side IGBT module A include the first low-pressure side IGBT power tube A and third low-pressure side IGBT power tube
A, the second low-pressure side IGBT module A include the second low-pressure side IGBT power tube A and the 4th low-pressure side IGBT power tube A, low
The collector of the DC+ of straightening galvanic electricity and the first low-pressure side IGBT power tube A and the collector phase of the second low-pressure side IGBT power tube A
Even, the emitter of the DC- and third low-pressure side IGBT power tube A of low-voltage DC and the hair of the 4th low-pressure side IGBT power tube A
Emitter-base bandgap grading is connected, and the emitter of the first low-pressure side IGBT power tube A is connected with the collector of third low-pressure side IGBT power tube A, the
The emitter of two low-pressure side IGBT power tube A is connected with the collector of the 4th low-pressure side IGBT power tube A.
Further, the second low-pressure side inverter bridge includes the first low-pressure side IGBT module B and the second low-pressure side IGBT
Module B, the first low-pressure side IGBT module B include the first low-pressure side IGBT power tube B and third low-pressure side IGBT power tube
B, the second low-pressure side IGBT module B include the second low-pressure side IGBT power tube B and the 4th low-pressure side IGBT power tube B, low
The collector of the DC+ of straightening galvanic electricity and the first low-pressure side IGBT power tube B and the collector phase of the second low-pressure side IGBT power tube B
Even, the emitter of the DC- and third low-pressure side IGBT power tube B of low-voltage DC and the hair of the 4th low-pressure side IGBT power tube B
Emitter-base bandgap grading is connected, and the emitter of the first low-pressure side IGBT power tube B is connected with the collector of third low-pressure side IGBT power tube B, the
The emitter of two low-pressure side IGBT power tube B is connected with the collector of the 4th low-pressure side IGBT power tube B.
The beneficial effects of the utility model are: the utility model provides a kind of high-power high-efficiency for railcar
High frequency transformer and low-pressure side inverter bridge by the way that a high-pressure side inverter bridge is arranged, and are designed to two-way by bidirectional charger,
The IGBT module for solving great power bidirectional charger high-pressure side inverter bridge to a certain extent, which is opened to cut-off, is lost larger, low-pressure side
The excessive problem of electric current, and it is lower by that high input voltage voltage can be made to drop to one in high-pressure side one BUCK reduction voltage circuit of design
Value, such as 600V, and in high side voltage fluctuation, it can be steady by high-pressure side inverter bridge input voltage by BUCK reduction voltage circuit
It in 600V, influence high-pressure side inverter bridge will not by input voltage fluctuation.And BUCK reduction voltage circuit, it is opened using series resonance soft
The efficiency of system can be adjusted to best by the mode of pass.Simultaneously as the input voltage in the inverter bridge of high-pressure side drops to
600V can choose the IGBT power tube of lower voltage (such as 1200V), so as to substantially reduce in the inverter bridge of high-pressure side
Switching loss reaches the efficiency for the system of further improving.And by the way that the first, second high frequency transformer is designed as intermediate pumping
Head, and on-off is controlled by corresponding high voltage connector, it realizes with the same high frequency transformer and solves bidirectional charger low pressure
(by taking T1 as an example: when charging from high-pressure side toward battery, KM1 is disconnected the big problem of side scope range of the fluctuation of voltage, and KM2 is connected, T1's
The turn ratio of 2 lateral coils becomes larger.When from battery toward high-pressure side step-up discharge, KM2 is disconnected, and KM1 is connected, 2 lateral coils of T1
Turn ratio become smaller, can be solved in this way with the same high frequency transformer bidirectional charger high-pressure side and low-pressure side voltage fluctuation
The big problem of range).And two-way high frequency transformer and low-pressure side inverter bridge realize the current balance type of two-way by current sharing inductor,
It is not in the problem of wherein leading to wherein overcurrent all the way all the way because electric current is unequal.Therefore, the utility model can satisfy
Subway power grid powerful requirement, and preferably solve high-pressure side inverter bridge lower, the low-pressure side electricity that is lost larger and efficiency
Big problem is flowed through, while solving the problems, such as that bidirectional charger high-pressure side and low-pressure side voltage fluctuation range are big.
Detailed description of the invention
Fig. 1 is main circuit topological structure of the utility model for the bidirectional charger of the high-power high-efficiency of railcar
Schematic diagram.
Specific embodiment
In order to be more clearly understood that the technology contents of the utility model, spy lifts following embodiment and is described in detail, mesh
Be only that the content for being best understood from the utility model rather than limit the protection scope of the utility model.
The utility model proposes a kind of bidirectional chargers of high-power high-efficiency for railcar, as shown in Figure 1, institute
The main circuit topological structure for stating bidirectional charger includes high-pressure side filter circuit, high-pressure side BUCK reduction voltage circuit, high-pressure side inversion
Bridge, current sharing inductor L1, the first high frequency transformer T1, the first low-pressure side inverter bridge, the second high frequency transformer T2, the second low-pressure side are inverse
Become bridge and low-pressure side filter circuit, the high voltage direct current of voltage change are connected with the DC terminal of the high-pressure side inverter bridge, institute
State high-pressure side and second high frequency change that the exchange end of high-pressure side inverter bridge divides two-way to be connected to first high frequency transformer
The high-pressure side of depressor, the low-pressure side of first high frequency transformer are connected with the end that exchanges of the first low-pressure side inverter bridge,
The low-pressure side of second high frequency transformer is connected with the end that exchanges of the second low-pressure side inverter bridge, first low-pressure side
The DC terminal of the DC terminal of inverter bridge and the second low-pressure side inverter bridge is connected to the low-voltage DC of voltage change, the height
Pressure side filter circuit, the high-pressure side BUCK reduction voltage circuit be all connected to the high voltage direct current and the high-pressure side inverter bridge it
Between, the low-pressure side filter circuit is connected to the low-voltage DC and the first low-pressure side inverter bridge and second low pressure
Between the inverter bridge of side, the exchange end of the high-pressure side inverter bridge is divided into two-way through the current sharing inductor, high with described first all the way
Frequency power transformer is connected, and another way is connected with the high-pressure side of second high frequency transformer；First high frequency transformer high-pressure side
With the first centre tap, second high frequency transformer have the second centre tap, the current sharing inductor separate all the way with
Be connected with the first high voltage connector KM1 between the high-pressure side of first high frequency transformer, and the current sharing inductor separate should
The second high voltage connector KM2 is connected between road and the first centre tap of first high frequency transformer；The current sharing inductor
Third high voltage connector KM3 is connected between the high-pressure side of the another way and second high frequency transformer that separate, and described equal
The 4th high voltage connector is connected between second centre tap on the road and second high frequency transformer that galvanic electricity sense separates
KM4。
In above structure, high-pressure side filter circuit is used to be filtered high-pressure side input and output voltage；High-pressure side is inverse
Become the inversion that bridge is used for high-pressure side input and output voltage；High frequency transformer is used for the transformation of high-low pressure voltage；Low-pressure side inverter bridge
Inversion for low-pressure side input and output voltage；Low-pressure side filter circuit is for being filtered low-pressure side input and output voltage.
And by one high-pressure side inverter bridge of setting, and high frequency transformer and low-pressure side inverter bridge are designed to two-way, to a certain degree
On solve great power bidirectional charger high-pressure side inverter bridge IGBT module open cut-off loss it is larger, low-pressure side electric current is excessive
The problem of, and high input voltage voltage can be made to drop to a lower value by designing a BUCK reduction voltage circuit in high-pressure side, such as
600V, and in high side voltage fluctuation, high-pressure side inverter bridge stabilized input voltage can be existed by BUCK reduction voltage circuit
600V influence high-pressure side inverter bridge will not by input voltage fluctuation.And BUCK reduction voltage circuit uses series resonance Sofe Switch
Mode, the efficiency of system can be adjusted to best.Simultaneously as the input voltage in the inverter bridge of high-pressure side drops to 600V,
It can choose the IGBT power tube of lower voltage (such as 1200V), so as to substantially reduce the switch in the inverter bridge of high-pressure side
Loss, achievees the purpose that the efficiency for further improving system.Meanwhile by the way that the first, second high frequency transformer is designed as in
Between tap, and by corresponding high voltage connector control on-off, realize with the same high frequency transformer and solve bidirectional charger
The big problem of low-pressure side voltage fluctuation range (by taking T1 as an example: when charging from high-pressure side toward battery, KM1 is disconnected, and KM2 is connected,
The turn ratio of 2 lateral coils of T1 becomes larger.When from battery toward high-pressure side step-up discharge, KM2 is disconnected, and KM1 is connected, 2 sides of T1
The turn ratio of coil becomes smaller, and can solve bidirectional charger high-pressure side and low-pressure side voltage with the same high frequency transformer in this way
The big problem of fluctuation range).And two-way high frequency transformer and low-pressure side inverter bridge realize the electric current of two-way by current sharing inductor
Balance is not in the problem of wherein leading to wherein overcurrent all the way all the way because electric current is unequal.Therefore, the utility model energy
Enough contentedly powerful requirements of ferroelectricity net, and preferably solve high-pressure side inverter bridge and be lost that larger and efficiency is lower, low pressure
The excessive problem of side electric current, while solving the problems, such as that bidirectional charger high-pressure side and low-pressure side voltage fluctuation range are big.
When the utility model great power bidirectional charger is applied on railcar, subway power grid and storage can be directly arranged at
Between battery, and it can adapt to the big requirement of railcar high-low pressure two sides scope range of the fluctuation of voltage, while there is the low damage of high efficiency
The advantages of consumption.Since the great power bidirectional charger has bidirectional power supply function, it is normal for netting in usually railcar
In the case of may be implemented from subway power grid obtain energy as charger to battery charge.It goes wrong in railcar for net
(vehicle, Guangdong power system etc. are moved in station) in special circumstances the electric energy of battery can be converted into high voltage direct current and be supplied to
Vehicle traction convertor carries out emergency traction and uses.It, can be with when there is Guangdong power system after railcar installs the equipment
Ensure that vehicle will not stop, waits for rescue.Fault car can voluntarily sail out of fault zone, the station for keeping vehicle nearest into
Traveller visitor's evacuation.Greatly enhance can vehicle Ability of emergency management.The safety by bus of passenger is ensured.
Preferably, the voltage change range of the low-voltage DC is DC130V~80V；In normal state, high-power
The DC1500V of subway power grid is transformed to DC110V by bidirectional charger, drives the DC load of all DC110V on railcar,
And meet charging requirement as defined in battery, it can be by the charge characteristic of battery to battery floating charge.Local ferroelectricity net occurs
Problem, bidirectional charger boosts to the emergency low-voltage direct discharge voltage DC110V of battery not less than DC1000V, for emergency
Traction uses.
Preferably, the first high pressure is connected between the exchange end of the high-pressure side inverter bridge and first high frequency transformer
Side resonant capacitance C2 is connected with the second high-pressure side between the exchange end of the high-pressure side inverter bridge and second high frequency transformer
Resonant capacitance C3；The first low pressure is connected between the exchange end of the first low-pressure side inverter bridge and first high frequency transformer
It is low to be connected with second between the exchange end of the second low-pressure side inverter bridge and second high frequency transformer by side resonant capacitance C4
Press side resonant capacitance C5.
Preferably, the high-pressure side inverter bridge includes the first high-pressure side IGBT module Q1 and the second high-pressure side IGBT module
Q2, first high-pressure side IGBT module includes the first high-pressure side IGBT power tube and third high-pressure side IGBT power tube, described
Second high-pressure side IGBT module includes the second high-pressure side IGBT power tube and the 4th high-pressure side IGBT power tube, high voltage direct current
DC+ is connected with the collector of the collector of the first high-pressure side IGBT power tube and the second high-pressure side IGBT power tube, high voltage direct current
The DC- of electricity is connected with the emitter of the emitter of third high-pressure side IGBT power tube and the 4th high-pressure side IGBT power tube, and first
The emitter of high-pressure side IGBT power tube is connected with the collector of third high-pressure side IGBT power tube, the second high-pressure side IGBT power
The emitter of pipe is connected with the collector of the 4th high-pressure side IGBT power tube.
Preferably, the high-pressure side filter circuit is high-pressure side filter capacitor C1, and the high-pressure side filter capacitor is parallel to
Between the DC+ of high voltage direct current and the DC- of high voltage direct current.
Preferably, the high-pressure side BUCK reduction voltage circuit includes reduction voltage circuit IGBT power tube Q7, sustained diode 1, storage
It can inductance L2, reduction voltage circuit filter capacitor C7, the collector of the reduction voltage circuit IGBT power tube and the high voltage direct current phase
Even, the emitter of the reduction voltage circuit IGBT power tube is connected with described energy storage inductor one end, the other end of the energy storage inductor
It is connected with the collector of the first high-pressure side IGBT power tube, the negative pole end of the freewheeling diode is connected to the decompression electricity
Between the emitter of road IGBT power tube and one end of the energy storage inductor, the positive terminal of the freewheeling diode is connected to high pressure
The DC- of direct current, reduction voltage circuit filter capacitor one end be connected to the energy storage inductor the other end and first high pressure
Between the collector of side IGBT power tube, the other end of the reduction voltage circuit filter capacitor is connected to the DC- of high voltage direct current.This
The efficiency of system can be adjusted to best by the way of series resonance Sofe Switch by sample, BUCK reduction voltage circuit.Simultaneously as
Input voltage in the inverter bridge of high-pressure side drops to 600V, can choose the IGBT power tube of lower voltage (such as 1200V), thus
The switching loss in the inverter bridge of high-pressure side can be substantially reduced, achievees the purpose that the efficiency for further improving system.
Preferably, the collector of the emitter of the first high-pressure side IGBT power tube and third high-pressure side IGBT power tube
Tie point divide two-way after be connected with first high frequency transformer and second high frequency transformer, second high-pressure side
The tie point of the emitter of IGBT power tube and the collector of the 4th high-pressure side IGBT power tube divides high with described first after two-way
Frequency power transformer and second high frequency transformer are connected, and the current sharing inductor L1 is series at from the second high-pressure side IGBT power
In the two-way that the tie point of the emitter of pipe and the collector of the 4th high-pressure side IGBT power tube separates.
Preferably, the first low-pressure side inverter bridge includes the first low-pressure side IGBT module A Q3 and the second low-pressure side IGBT
Modules A Q5, the first low-pressure side IGBT module A include the first low-pressure side IGBT power tube A and third low-pressure side IGBT power
Pipe A, the second low-pressure side IGBT module A include the second low-pressure side IGBT power tube A and the 4th low-pressure side IGBT power tube A,
The collector of the DC+ of low-voltage DC and the first low-pressure side IGBT power tube A and the collector of the second low-pressure side IGBT power tube A
It is connected, the emitter of the DC- and third low-pressure side IGBT power tube A of low-voltage DC and the 4th low-pressure side IGBT power tube A's
Emitter is connected, and the emitter of the first low-pressure side IGBT power tube A is connected with the collector of third low-pressure side IGBT power tube A,
The emitter of second low-pressure side IGBT power tube A is connected with the collector of the 4th low-pressure side IGBT power tube A.
Preferably, the second low-pressure side inverter bridge includes the first low-pressure side IGBT module B Q4 and the second low-pressure side IGBT
Module B Q6, the first low-pressure side IGBT module B include the first low-pressure side IGBT power tube B and third low-pressure side IGBT power
Pipe B, the second low-pressure side IGBT module B include the second low-pressure side IGBT power tube B and the 4th low-pressure side IGBT power tube B,
The collector of the DC+ of low-voltage DC and the first low-pressure side IGBT power tube B and the collector of the second low-pressure side IGBT power tube B
It is connected, the emitter of the DC- and third low-pressure side IGBT power tube B of low-voltage DC and the 4th low-pressure side IGBT power tube B's
Emitter is connected, and the emitter of the first low-pressure side IGBT power tube B is connected with the collector of third low-pressure side IGBT power tube B,
The emitter of second low-pressure side IGBT power tube B is connected with the collector of the 4th low-pressure side IGBT power tube B.
It to sum up, can be straight the utility model proposes a kind of bidirectional charger of high-power high-efficiency for railcar
It connects between the high voltage direct current for the voltage change for being set to subway power grid and the low-voltage DC of the voltage change of battery, meets
Subway power grid is high-power and voltage change range biggish requirement, and it is larger to solve the loss of high-pressure side inverter bridge, low-pressure side electricity
Big problem is flowed through, which usually may be implemented to obtain energy from subway power grid to battery charging, special
In the case of (vehicle, Guangdong power system etc. are moved in station) electric energy of battery can be converted into high pressure and be supplied to vehicle traction current transformation
Device carries out emergency traction and uses.
Above embodiments are that the preferred embodiment of the utility model is described in detail referring to attached drawing.The skill of this field
Art personnel are by carrying out modification or change on various forms, but the feelings of the essence without departing substantially from the utility model to above-described embodiment
Under condition, all fall within the scope of the present invention.
Claims (9)
1. a kind of bidirectional charger of the high-power high-efficiency for railcar, it is characterised in that: the bidirectional charger
Main circuit topological structure includes high-pressure side filter circuit, high-pressure side BUCK reduction voltage circuit, high-pressure side inverter bridge, current sharing inductor,
One high frequency transformer, the first low-pressure side inverter bridge, the second high frequency transformer, the second low-pressure side inverter bridge and low-pressure side filtered electrical
Road, the high voltage direct current of voltage change are connected with the DC terminal of the high-pressure side inverter bridge, the friendship of the high-pressure side inverter bridge
Stream end divides two-way to be connected to the high-pressure side of first high frequency transformer and the high-pressure side of second high frequency transformer, and described the
The low-pressure side of one high frequency transformer is connected with the end that exchanges of the first low-pressure side inverter bridge, second high frequency transformer
Low-pressure side is connected with the end that exchanges of the second low-pressure side inverter bridge, the DC terminal of the first low-pressure side inverter bridge and described
The DC terminal of second low-pressure side inverter bridge is connected to the low-voltage DC of voltage change, the high-pressure side filter circuit, the height
Pressure side BUCK reduction voltage circuit is all connected between the high voltage direct current and the high-pressure side inverter bridge, the low-pressure side filtered electrical
Road is connected between the low-voltage DC and the first low-pressure side inverter bridge and the second low-pressure side inverter bridge, the height
The exchange end of pressure side inverter bridge is divided into two-way through the current sharing inductor, is connected all the way with first high frequency transformer, another way
It is connected with the high-pressure side of second high frequency transformer；First high frequency transformer high-pressure side has the first centre tap, institute
The second high frequency transformer is stated with the second centre tap, the current sharing inductor separate all the way with first high frequency transformer
It is connected with the first high voltage connector between high-pressure side, and the road that separates of the current sharing inductor and first high frequency transformer
The second high voltage connector is connected between first centre tap；The another way and second high frequency that the current sharing inductor separates become
Third high voltage connector is connected between the high-pressure side of depressor, and the road that the current sharing inductor separates becomes with second high frequency
The 4th high voltage connector is connected between second centre tap of depressor.
2. the bidirectional charger of the high-power high-efficiency according to claim 1 for railcar, which is characterized in that institute
The voltage change range for stating low-voltage DC is DC130V~80V.
3. the bidirectional charger of the high-power high-efficiency according to claim 1 for railcar, which is characterized in that institute
It states and is connected with the first high-pressure side resonant capacitance, the height between the exchange end of high-pressure side inverter bridge and first high frequency transformer
It presses and is connected with the second high-pressure side resonant capacitance between the exchange end and second high frequency transformer of side inverter bridge；Described first is low
It presses and is connected with the first low-pressure side resonant capacitance between the exchange end and first high frequency transformer of side inverter bridge, described second is low
It presses and is connected with the second low-pressure side resonant capacitance between the exchange end and second high frequency transformer of side inverter bridge.
4. the bidirectional charger of the high-power high-efficiency according to claim 1 for railcar, which is characterized in that institute
Stating high-pressure side inverter bridge includes the first high-pressure side IGBT module and the second high-pressure side IGBT module, the first high-pressure side IGBT mould
Block includes the first high-pressure side IGBT power tube and third high-pressure side IGBT power tube, and second high-pressure side IGBT module includes the
Two high-pressure side IGBT power tubes and the 4th high-pressure side IGBT power tube, the DC+ of high voltage direct current and the first high-pressure side IGBT power
The collector of the collector of pipe and the second high-pressure side IGBT power tube is connected, the DC- and third high-pressure side IGBT of high voltage direct current
The emitter of the emitter of power tube and the 4th high-pressure side IGBT power tube is connected, the emitter of the first high-pressure side IGBT power tube
It is connected with the collector of third high-pressure side IGBT power tube, the emitter of the second high-pressure side IGBT power tube and the 4th high-pressure side
The collector of IGBT power tube is connected.
5. the bidirectional charger of the high-power high-efficiency according to claim 4 for railcar, which is characterized in that institute
Stating high-pressure side filter circuit is high-pressure side filter capacitor, and the high-pressure side filter capacitor is parallel to the DC+ and height of high voltage direct current
Between the DC- of straightening galvanic electricity.
6. the bidirectional charger of the high-power high-efficiency according to claim 4 for railcar, which is characterized in that institute
Stating high-pressure side BUCK reduction voltage circuit includes reduction voltage circuit IGBT power tube, freewheeling diode, energy storage inductor, reduction voltage circuit filtered electrical
Hold, collector and the high voltage direct current of the reduction voltage circuit IGBT power tube are electrically connected, the reduction voltage circuit IGBT power tube
Emitter be connected with described energy storage inductor one end, the other end of the energy storage inductor and the first high-pressure side IGBT power tube
Collector be connected, the negative pole end of the freewheeling diode be connected to the emitter of the reduction voltage circuit IGBT power tube with it is described
Between one end of energy storage inductor, the positive terminal of the freewheeling diode is connected to the DC- of high voltage direct current, the reduction voltage circuit filter
Wave capacitor one end is connected between the other end of the energy storage inductor and the collector of the first high-pressure side IGBT power tube, institute
The other end for stating reduction voltage circuit filter capacitor is connected to the DC- of high voltage direct current.
7. the bidirectional charger of the high-power high-efficiency according to claim 4 for railcar, which is characterized in that institute
The tie point for stating the emitter of the first high-pressure side IGBT power tube and the collector of the third high-pressure side IGBT power tube is divided to two
First high frequency transformer described in Lu Houyu and second high frequency transformer are connected, the hair of the second high-pressure side IGBT power tube
The tie point of the collector of emitter-base bandgap grading and the 4th high-pressure side IGBT power tube divide after two-way with first high frequency transformer and
Second high frequency transformer is connected, the current sharing inductor be series at from the emitter of the second high-pressure side IGBT power tube with
In the separated two-way of the tie point of the collector of 4th high-pressure side IGBT power tube.
8. the bidirectional charger of the high-power high-efficiency according to claim 4 for railcar, which is characterized in that institute
Stating the first low-pressure side inverter bridge includes the first low-pressure side IGBT module A and the second low-pressure side IGBT module A, first low-pressure side
IGBT module A includes the first low-pressure side IGBT power tube A and third low-pressure side IGBT power tube A, the second low-pressure side IGBT
Modules A includes the second low-pressure side IGBT power tube A and the 4th low-pressure side IGBT power tube A, the DC+ of low-voltage DC low with first
Press side IGBT power tube A collector and the second low-pressure side IGBT power tube A collector be connected, the DC- of low-voltage DC with
The emitter of third low-pressure side IGBT power tube A and the emitter of the 4th low-pressure side IGBT power tube A are connected, the first low-pressure side
The emitter of IGBT power tube A is connected with the collector of third low-pressure side IGBT power tube A, the second low-pressure side IGBT power tube A
Emitter be connected with the collector of the 4th low-pressure side IGBT power tube A.
9. the bidirectional charger of the high-power high-efficiency according to claim 4 for railcar, which is characterized in that institute
Stating the second low-pressure side inverter bridge includes the first low-pressure side IGBT module B and the second low-pressure side IGBT module B, first low-pressure side
IGBT module B includes the first low-pressure side IGBT power tube B and third low-pressure side IGBT power tube B, the second low-pressure side IGBT
Module B includes the second low-pressure side IGBT power tube B and the 4th low-pressure side IGBT power tube B, the DC+ of low-voltage DC low with first
Press side IGBT power tube B collector and the second low-pressure side IGBT power tube B collector be connected, the DC- of low-voltage DC with
The emitter of third low-pressure side IGBT power tube B and the emitter of the 4th low-pressure side IGBT power tube B are connected, the first low-pressure side
The emitter of IGBT power tube B is connected with the collector of third low-pressure side IGBT power tube B, the second low-pressure side IGBT power tube B
Emitter be connected with the collector of the 4th low-pressure side IGBT power tube B.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820599654.4U CN208439091U (en) | 2018-04-25 | 2018-04-25 | The bidirectional charger of high-power high-efficiency for railcar |
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| CN201820599654.4U CN208439091U (en) | 2018-04-25 | 2018-04-25 | The bidirectional charger of high-power high-efficiency for railcar |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108312889A (en) * | 2018-04-25 | 2018-07-24 | 苏州市万松电气有限公司 | The bidirectional charger of high-power high-efficiency for railcar |
| CN110350777A (en) * | 2019-06-25 | 2019-10-18 | 青岛航天半导体研究所有限公司 | The width input high-power liquid cooling DC-DC power source of high power density |
| CN111030469A (en) * | 2019-12-26 | 2020-04-17 | 广州金升阳科技有限公司 | High-voltage power supply circuit |
-
2018
- 2018-04-25 CN CN201820599654.4U patent/CN208439091U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108312889A (en) * | 2018-04-25 | 2018-07-24 | 苏州市万松电气有限公司 | The bidirectional charger of high-power high-efficiency for railcar |
| CN108312889B (en) * | 2018-04-25 | 2024-01-09 | 苏州市万松电气有限公司 | High-power high-efficiency bidirectional charger for subway vehicle |
| CN110350777A (en) * | 2019-06-25 | 2019-10-18 | 青岛航天半导体研究所有限公司 | The width input high-power liquid cooling DC-DC power source of high power density |
| CN111030469A (en) * | 2019-12-26 | 2020-04-17 | 广州金升阳科技有限公司 | High-voltage power supply circuit |
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