CN208078908U - A kind of locomotive unsteady flow power cell - Google Patents
A kind of locomotive unsteady flow power cell Download PDFInfo
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- CN208078908U CN208078908U CN201721795669.XU CN201721795669U CN208078908U CN 208078908 U CN208078908 U CN 208078908U CN 201721795669 U CN201721795669 U CN 201721795669U CN 208078908 U CN208078908 U CN 208078908U
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- bus bar
- composite bus
- rectification
- module
- copped wave
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Abstract
The utility model discloses a kind of locomotive unsteady flow power cells, including rectification+copped wave module composite bus bar (1), inverter module composite bus bar (2) and capacitance composite bus bar (3)；The rectification+the DC output end of copped wave module composite bus bar (1), the direct-flow input end of inverter module composite bus bar (2), capacitance composite bus bar (3) output end terminal use back-to-back connection type；Capacitance composite bus bar (3) connects the output of rectification+copped wave module composite bus bar (1) and the input of inverter module composite bus bar (2)；Intermediate loop Support Capacitor is positioned close to power module DC bus terminals.The utility model can reduce the use of switching device absorbing circuit, while ensureing switching device reliability service, reduce design cost, reduce the volume and weight of device, the design of locomotive converter system is made more to optimize.
Description
Technical field
The utility model belongs to technical field of diesel locomotive, is related to power cell, especially a kind of locomotive unsteady flow power list
Member.
Background technology
The development of locomotive AC drive technology, it is increasingly wide as the current transformer application of switching device using high-power IGBT
It is general.With the raising of current transformer power grade, the requirement to abilities such as pressure resistance, overcurrent, insulation and heat dissipations is harsher, often needs
Powerful switching device, large-sized passive element and cooling system are used, the connecting wire ruler between switching device is caused
Very little increase, distance between conductors lengthens, to make the stray parameter of main circuit line increase.DC bus stray parameter may cause
Device and equipment damage, are affected to system reliability and runnability, especially in transient state commutation course.
Diesel locomotive alternating-current actuating system is that single diesel engine unit generates electricity, and diesel engine drags main generator, exports three-phase alternating current
Voltage, through uncontrollable rectifier circuit, chopper circuit, intermediate DC link, inverter circuit, driving traction electric machine leads to complete locomotive
Draw control, system main circuit principle is as shown in Figure 1.
Because of the limitation in locomotive space, also for the maintenance for facilitating main circuit, existing converter plant power cell is gradual
Start to use modular design, by the multiple switch device of main circuit and its driving circuit, radiator, main circuit line etc.
It is integrated, forms power cell.Power cell main circuit line also begins to widely used stack bus bar technology and replaces traditional electricity
Cable twisted wire mode reduces the stray inductance of main circuit by increasing the overlapping coupling area between positive and negative busbar, at the same using compared with
The connection between high current, high-voltage switch device is realized in small space, reduces system cost, improves equipment dependability and matter
Amount.
Due to realize different circuit functions, main circuit of electric locomotive include rectification unit, copped wave unit intermediate DC link,
Inverter circuit etc., thus also include multiple types as the composite bus bar of main circuit connection, such as：Rectification+compound the mother of copped wave module
Row, inverter module composite bus bar and with the capacitor bus-bar of intermediate supports capacitance connection etc..In previous product design, design
The division of labor is thinner, but because the difference of division of design only considers that module self compounding busbar is miscellaneous as the designer of power module
Scattered inductance parameters, and design of the designer of converter cabinet for capacitor bus-bar, usually only consider the reasonability of structure, because not having
Have and be directly connected with switching device, its electric property cannot be considered.As the entire converter plant after being completed,
To avoid overall stray inductance parameter from damaging switching device, need to increase absorbing circuit.
In the prior art, although single power module stray inductance meets the requirements, but the stray electrical inductance value of whole system
The requirement of switching device is not still met, it is therefore desirable to additionally increase absorbing circuit, ensure the reliability service of switching device.It inhales
Receive the use of circuit so that the volume and weight of power cell increases, and occupied space is big, causes that system is too fat to move, design cost increases
Add.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts provides a kind of locomotive unsteady flow power cell.
The purpose of this utility model is achieved through the following technical solutions：
The utility model proposes a kind of locomotive unsteady flow power cells：The DC output end of rectification+copped wave module composite bus bar,
The direct-flow input end of inverter module composite bus bar, the output end terminal of capacitance composite bus bar use back-to-back connection type；Electricity
Hold composite bus bar connection rectification+output of copped wave module composite bus bar and the input of inverter module composite bus bar；Intermediate loop
Support Capacitor is positioned close to power module DC bus terminals.
Further, it is set in rectification+chopped power module on above-mentioned rectification+copped wave module composite bus bar, the rectification+
Chopped power module includes the bridge arm of rectification circuit and the copped wave branch of chopper circuit, i.e. every group of bridge arm and all the way copped wave branch group
At rectification+chopped power phase module.
The upper rectification circuit is made of three groups of independent bridge arms.Above-mentioned inverter circuit can by three independent three phase full bridges
Control inverted power module composes in parallel.
Above-mentioned chopper circuit is made of the independent copped wave branch in three tunnels.
The utility model has the advantages that：
The design method and locomotive unsteady flow power cell of the optimization main circuit totality stray inductance of the utility model are to be directed to
Influence of the main circuit stray inductance to switching device, proposes the optimum design method of main circuit stray inductance, and applies in internal combustion
In the designing and developing of locomotive unsteady flow power cell.The design can reduce the use of switching device absorbing circuit, ensure to switch
While device reliability service, design cost is reduced, reduces the volume and weight of device, makes the design of locomotive converter system
More optimize.
Further, the utility model uses low sense composite bus bar technology, saves space, is easily installed maintenance, reduces dimension
Protect cost.
Further, Tthe utility model system, the design of the main circuit stray inductance of integration, ensure that switching device is reliably transported
Row.
Further, the utility model eliminates IGBT absorption circuits, reduces power cell cost, reduces volume and weight.
Description of the drawings
Fig. 1 is diesel locomotive alternating-current actuating system main circuit schematic diagram；
Fig. 2 is the main circuit topology figure of the utility model；
Fig. 3 is the utility model power cell schematic layout pattern；
Fig. 4 is the utility model converter cabinet composite bus bar structural schematic diagram；
Fig. 5 is 1 structural schematic diagram of rectification module composite bus bar of the utility model；
Fig. 6 is 2 structural schematic diagram of inverter module composite bus bar of the utility model.
Wherein：1 is rectification+copped wave module composite bus bar；2 be inverter module composite bus bar；3 be capacitance composite bus bar；4 are
Capacitance.
Specific implementation mode
Big-power transducer switching device is in switching process, due to from DC energy storage capacitance to IGBT device DC bus
On parasitic inductance and IGBT module own inductance influence, will produce very high peak voltage, this peak voltage can make device
Part overheats, or even keeps IGBT out of control and damaged more than the load rated safety workspace of device.It is, therefore, necessary to by being produced in switching process
Within the allowable range, one of method just uses stack bus bar technology, reduces DC loop power generatrix for raw peak voltage limitation
Distributed inductance.
It finds in the design, stray inductance is influenced to what power device turned off not only by spuious inside single power module
Inductance effect, power module and Support Capacitor are connected to a part for main circuit, and stray inductance also can cause shadow to device
It rings.For several power modules after the completion of converter cabinet connects, the overall stray inductance of system is not the compound mother of several power modules
The simple superposition of stray inductance is arranged, the design of different faying surfaces has larger impact to the stray inductance of system.
Therefore, the utility model proposes a kind of design method of optimization main circuit totality stray inductance, this method tool first
Body is：Main circuit connection uses composite bus bar, and in the design of power module and current transformer Support Capacitor busbar, carries out entire
System stray inductance design parameter is considered, and the requirement of each section stray inductance is met, and cancels absorbing circuit, thus into one
Step simplifies apparatus structure, mitigates weight, reduces volume, reduces cost.
In the method for the utility model：According to device layout and structural requirement, the composite bus bar of individual module is designed, and
Simulation analysis and experiment are carried out, the stray inductance of the composite bus bar of individual module is made to meet the application demand of device；It then will be single
The composite bus bar of a module assembles carry out associative simulation with current transformer Support Capacitor composite bus bar, according to simulation result, adjusts
Whole device layout is so as to adjust the structure of composite bus bar, shape, the shapes and sizes of faying surface of change composite bus bar output end
And the connection type of leading-out terminal makes main circuit system while making the stray inductance minimum of the composite bus bar of individual module
Stray inductance it is minimum.
The utility model also proposes that a kind of locomotive of the design method based on above-mentioned optimization main circuit totality stray inductance becomes
Power cell is flowed, as shown in Figure 4：DC output end, the inversion mould of rectification+copped wave module composite bus bar 1 (structure is as shown in Figure 5)
The direct-flow input end of block composite bus bar 2 (structure is as shown in Figure 6), the output end terminal of capacitance composite bus bar 3 are using back-to-back
Connection type；Capacitance composite bus bar 3 connects output and the inverter module composite bus bar 2 of rectification+copped wave module composite bus bar 1
Input；Intermediate loop Support Capacitor is positioned close to power module DC bus terminals, facilitates capacitor bus-bar and power mould
The connection of block reduces the use of transition busbar, optimizes stray inductance.
It is set in rectification+chopped power module on the rectification of the utility model+copped wave module composite bus bar 1, rectification+cut
Wave power module includes the bridge arm of rectification circuit and the copped wave branch of chopper circuit, i.e. every group of bridge arm and all the way copped wave branch form
Rectification+chopped power module.
As shown in Figures 2 and 3, the utility model locomotive unsteady flow power cell further includes rectification circuit, chopper circuit and inverse
Become circuit；Rectification circuit is in parallel by three groups of bridge arms, forms a complete rectified three-phase circuit；Chopper circuit includes three independences
Copped wave branch, every copped wave branch routing single tube and copped wave resistance concatenate.One group of rectifying bridge arm and all the way copped wave branch group
At a traction rectifier and copped wave phase module, after three phase module parallel connections, then be connected across the DC bus of intermediate DC link
Positive and negative both ends；Intermediate DC link is connected to inverter circuit；Inverter circuit is composed in parallel by three inverted power modules.Rectified current
Road, chopper circuit and inverter circuit are arranged in the cabinet of diesel locomotive converter cabinet, and there are three mutually solely for setting in cabinet
The vertical air duct to radiate, there are one traction rectifiers and copped wave phase module and an inverter power mould for setting in each independent ventiduct
Block.Inverted power module is three-phase inversion power cell.Three-phase inversion power cell is connected with motor.
Entire converter cabinet includes three rectifications and copped wave phase power module and three three-phase inversion power cells.It is entire in this way
Converter cabinet only includes two kinds of module, and the system type of design is conducive to the exchange of power cell, facilitates installation maintenance.
Three mutually independent air channel structure layouts are identical, and the heat sink part of module is placed in three air ducts, module
Other component is isolated in the front in air duct and air duct by sealing strip.This uniform layout type is conducive to power module
Design selection and heat dissipation design.
Each power cell of the utility model further includes having radiator, switching device, driving plate, adaptation board, low sense compound
The components such as busbar, combined screen shield plate complete the functions such as IGBT switch change-overs, driving and protection, heat dissipation according to system command, and
It is final to realize the three-phase alternating current of input by handing over straight alternation, traction electric machine is driven, locomotive traction function is completed.
Claims (4)
1. a kind of locomotive unsteady flow power cell, which is characterized in that multiple including rectification+copped wave module composite bus bar (1), inverter module
Close busbar (2) and capacitance composite bus bar (3)；DC output end, the inverter module of the rectification+copped wave module composite bus bar (1)
The direct-flow input end of composite bus bar (2), the output end terminal of capacitance composite bus bar (3) use back-to-back connection type；Capacitance
Composite bus bar (3) connects the output of rectification+copped wave module composite bus bar (1) and the input of inverter module composite bus bar (2)；
Intermediate loop Support Capacitor is positioned close to power module DC bus terminals.
2. locomotive unsteady flow power cell according to claim 1, which is characterized in that the rectification+compound mother of copped wave module
It is set in rectification+chopped power module on row (1), the rectification+chopped power module includes the bridge arm of rectification circuit and cuts
The copped wave branch of wave circuit, i.e. every group of bridge arm and all the way copped wave branch form rectification+chopped power phase module.
3. locomotive unsteady flow power cell according to claim 2, which is characterized in that the rectification circuit is independent by three groups
Bridge arm forms.
4. locomotive unsteady flow power cell according to claim 2, which is characterized in that the chopper circuit is independent by three tunnels
Copped wave branch forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721795669.XU CN208078908U (en) | 2017-12-20 | 2017-12-20 | A kind of locomotive unsteady flow power cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721795669.XU CN208078908U (en) | 2017-12-20 | 2017-12-20 | A kind of locomotive unsteady flow power cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208078908U true CN208078908U (en) | 2018-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721795669.XU Active CN208078908U (en) | 2017-12-20 | 2017-12-20 | A kind of locomotive unsteady flow power cell |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114079389A (en) * | 2020-08-12 | 2022-02-22 | 中车株洲电力机车研究所有限公司 | Converter module and main structure thereof |
| CN114270691A (en) * | 2019-08-27 | 2022-04-01 | 株式会社电装 | Conducting part for power conversion circuit |
-
2017
- 2017-12-20 CN CN201721795669.XU patent/CN208078908U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114270691A (en) * | 2019-08-27 | 2022-04-01 | 株式会社电装 | Conducting part for power conversion circuit |
| CN114270691B (en) * | 2019-08-27 | 2024-03-26 | 株式会社电装 | Energizing unit for power conversion circuit |
| CN114079389A (en) * | 2020-08-12 | 2022-02-22 | 中车株洲电力机车研究所有限公司 | Converter module and main structure thereof |
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