CN105720806A - Chopper circuit - Google Patents
Chopper circuit Download PDFInfo
- Publication number
- CN105720806A CN105720806A CN201410720633.XA CN201410720633A CN105720806A CN 105720806 A CN105720806 A CN 105720806A CN 201410720633 A CN201410720633 A CN 201410720633A CN 105720806 A CN105720806 A CN 105720806A
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- China
- Prior art keywords
- chopper circuit
- loop
- vdc
- connects
- igbt device
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention relates to a chopper circuit comprising a first chopper circuit (1) and a second chopper circuit (2). The current input end of the first chopper circuit (1) is electrically connected with the VDC positive end of an intermediate DC loop, and the current output end of the first chopper circuit (1) is electrically connected with the VDC negative end of the intermediate DC loop. The current input end of the second chopper circuit (2) is electrically connected with the VDC positive end of the intermediate DC loop, and the current output end of the second chopper circuit (2) is electrically connected with the VDC negative end of the intermediate DC loop. When the bus voltage of the intermediate DC loop exceeds a preset value, the first chopper circuit (1) and/or the second chopper circuit (2) are/is opened to consume part of the bus voltage so as to reduce the bus voltage to a specified value. Therefore, the stability of traction inverters is improved, and the stability of traction systems is improved.
Description
Technical field
The present invention relates to EMUs traction technique field, particularly relate to a kind of chopper circuit of traction convertor.
Background technology
Traction convertor is the important component part of EMU.Traction convertor is generally made up of four-quadrant rectifier and three-phase inverter, intermediate dc loop is the important loop connecting four-quadrant rectifier and three-phase inverter, and the stable of intermediate dc loop busbar voltage has highly important effect for the stable of whole traction current transformation system.
In prior art, owing to net voltage fluctuation, EMUs are braked and add the processes such as off-load, cause that intermediate dc loop busbar voltage fluctuates, cause the less stable of whole traction convertor.
Summary of the invention
The present invention provides a kind of chopper circuit, for solving the problem of traction convertor busbar voltage fluctuation in prior art.
Chopper circuit provided by the invention includes:
First chopper circuit (1) and the second chopper circuit (2)；
The current input terminal of the first chopper circuit (1) electrically connects with the VDC anode in described intermediate dc loop, and the current output terminal of the first chopper circuit (1) electrically connects with the VDC negative terminal in described intermediate dc loop；
The current input terminal of the second chopper circuit (2) electrically connects with the VDC anode in described intermediate dc loop, and the current output terminal of the second chopper circuit (2) electrically connects with the VDC negative terminal in described intermediate dc loop；
First chopper circuit (1) and/or the second chopper circuit (2) exceed during preset value open-minded for the busbar voltage in described intermediate dc loop, consume a part of busbar voltage, so that busbar voltage is reduced to setting.
Further, the first chopper circuit (1) including:
Insulated gate bipolar transistor IGBT device S17, current sensor TA1, resistance R2 and diode D1；
The C pole of described IGBT device S17 connects the VDC anode in described intermediate dc loop, the E pole of described IGBT device S17 connects one end of described current sensor TA1 and the negative electrode of described diode D1 respectively, and the other end of described current sensor TA1 connects one end of described resistance R2；The other end of described resistance R2 and the anode of described diode D1 connect the VDC negative terminal in described intermediate dc loop.
Further, the G pole of described IGBT device S17 connects IGBT driving.
Further, the second chopper circuit (2) including:
Insulated gate bipolar transistor IGBT device S18, current sensor TA2, resistance R3 and diode D2；
The C pole of described IGBT device S18 connects the VDC anode in described intermediate dc loop, the E pole of described IGBT device S18 connects one end of described current sensor TA2 and the negative electrode of described diode D2 respectively, and the other end of described current sensor TA2 connects one end of described resistance R3；The other end of described resistance R3 and the anode of described diode D2 connect the VDC negative terminal in described intermediate dc loop.
Further, the G pole of described IGBT device S18 connects IGBT driving.
Based on first aspect, in the 5th kind of embodiment in first, intermediate dc loop (5) are serially connected with Support Capacitor (10).
In the present invention, it is provided that a kind of chopper circuit, including: the first chopper circuit (1) and the second chopper circuit (2)；The current input terminal of the first chopper circuit (1) electrically connects with the VDC anode in described intermediate dc loop, and the current output terminal of the first chopper circuit (1) electrically connects with the VDC negative terminal in described intermediate dc loop；The current input terminal of the second chopper circuit (2) electrically connects with the VDC anode in described intermediate dc loop, and the current output terminal of the second chopper circuit (2) electrically connects with the VDC negative terminal in described intermediate dc loop；First chopper circuit (1) and/or the second chopper circuit (2) exceed during preset value open-minded for the busbar voltage in described intermediate dc loop, consume a part of busbar voltage, so that busbar voltage is reduced to setting, thus improving the stability of traction convertor.
Accompanying drawing explanation
Fig. 1 is the structural representation of chopper circuit embodiment provided by the invention；
Fig. 2 is the circuit theory diagrams of the first chopper circuit in chopper circuit provided by the invention；
Fig. 3 is the circuit theory diagrams of the second chopper circuit in chopper circuit provided by the invention.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Fig. 1 is the structural representation of chopper circuit embodiment provided by the invention, as it is shown in figure 1, include:
First chopper circuit 1 and the second chopper circuit 2；
The current input terminal of the first chopper circuit 1 electrically connects with the VDC anode in described intermediate dc loop, and the current output terminal of the first chopper circuit 1 electrically connects with the VDC negative terminal in described intermediate dc loop；
The current input terminal of the second chopper circuit 2 electrically connects with the VDC anode in described intermediate dc loop, and the current output terminal of the second chopper circuit 2 electrically connects with the VDC negative terminal in described intermediate dc loop；
First chopper circuit 1 and/or the second chopper circuit 2 exceed during preset value open-minded for the busbar voltage in described intermediate dc loop, consume a part of busbar voltage, so that busbar voltage is reduced to setting.
Wherein, intermediate dc loop is the partial circuit of traction convertor, and traction convertor specifically includes: the first input voltage and input current buffer circuit, the second input voltage and input current buffer circuit, the first four-quadrant rectifier, the second four-quadrant rectifier, intermediate dc loop, the first three-phase inverter and the second three-phase inverter；
First input voltage and input current buffer circuit and the electrical connection of the first four-quadrant rectifier, intermediate dc loop electrically connects the first four-quadrant rectifier, second input voltage and input current buffer circuit and the electrical connection of the second four-quadrant rectifier, intermediate dc loop electrically connects the second four-quadrant rectifier.
Chopper circuit with the annexation of each several part circuit in traction convertor is: the first chopper circuit electrically connects with intermediate dc loop and the first three-phase inverter respectively；Second chopper circuit electrically connects with intermediate dc loop and the second three-phase inverter respectively.
Wherein, input voltage and input current buffer circuit and input voltage and input current buffer circuit can ensure that the rate of change of electric current is unlikely to excessive when traction convertor initial power-on, reduce the initial power-on damage to traction convertor main circuit device.
Wherein, the first four-quadrant rectifier and the second four-quadrant rectifier Parallel opertation, the voltage of output is intermediate dc loop busbar voltage.
Further, Fig. 2 is the circuit theory diagrams of the first chopper circuit in chopper circuit provided by the invention, as in figure 2 it is shown, the first chopper circuit 1 includes:
Insulated gate bipolar transistor IGBT device S17, current sensor TA1, resistance R2 and diode D1；
The C pole of described IGBT device S17 connects the VDC anode in intermediate dc loop, the E pole of described IGBT device S17 connects one end of described current sensor TA1 and the negative electrode of described diode D1 respectively, and the other end of described current sensor TA1 connects one end of described resistance R2；The other end of described resistance R2 and the anode of described diode D1 connect the VDC negative terminal in intermediate dc loop.
Wherein, the G pole of described IGBT device S17 connects IGBT driving.Current sensor TA1, for monitoring instantaneous value and the virtual value of chopper circuit electric current in real time, IGBT and resistance to the first chopper circuit 1 play a protective role.
First chopper circuit 1 is connected between DC loop positive and negative terminal, exceedes under the operating mode of setting open-minded in busbar voltage, makes the energy of a part of busbar voltage of the resistance consumption on chopper circuit, so that busbar voltage drops to setting.
Further, Fig. 3 is the circuit theory diagrams of the second chopper circuit in chopper circuit provided by the invention, as it is shown on figure 3, the second chopper circuit 2 includes:
Insulated gate bipolar transistor IGBT device S18, current sensor TA2, resistance R3 and diode D2；
The C pole of described IGBT device S18 connects the VDC anode in intermediate dc loop, the E pole of described IGBT device S18 connects one end of described current sensor TA2 and the negative electrode of described diode D2 respectively, and the other end of described current sensor TA2 connects one end of described resistance R3；The other end of described resistance R3 and the anode of described diode D2 connect the VDC negative terminal in intermediate dc loop.
Wherein, the G pole of described IGBT device S18 connects IGBT driving.Current sensor TA2, for monitoring instantaneous value and the virtual value of chopper circuit electric current in real time, IGBT and resistance to the second chopper circuit 2 play a protective role.
Second chopper circuit 2 is connected between DC loop positive and negative terminal, exceedes under the operating mode of setting open-minded in busbar voltage, makes the energy of a part of busbar voltage of the resistance consumption on chopper circuit, so that busbar voltage drops to setting.
Needing to illustrate, when middle DC loop busbar voltage VDC exceedes setting, IGBTS17, S18 are open-minded, and the energy in intermediate dc loop is released by resistance R2, R3, drop to shutoff IGBTS17, S18 after setting until busbar voltage.First chopper circuit the 1, second chopper circuit 2 alternation during real work, stablizes intermediate dc loop voltage, reduces the busbar voltage fluctuation impact to middle DC loop electric component, improves the reliability of trailer system.
In the present embodiment, by providing a kind of chopper circuit, including: the first chopper circuit (1) and the second chopper circuit (2)；The current input terminal of the first chopper circuit (1) electrically connects with the VDC anode in described intermediate dc loop, and the current output terminal of the first chopper circuit (1) electrically connects with the VDC negative terminal in described intermediate dc loop；The current input terminal of the second chopper circuit (2) electrically connects with the VDC anode in described intermediate dc loop, and the current output terminal of the second chopper circuit (2) electrically connects with the VDC negative terminal in described intermediate dc loop；First chopper circuit (1) and/or the second chopper circuit (2) exceed during preset value open-minded for the busbar voltage in described intermediate dc loop, consume a part of busbar voltage, so that busbar voltage is reduced to setting, thus improving the stability of traction convertor.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (5)
1. a chopper circuit, it is characterised in that including:
First chopper circuit (1) and the second chopper circuit (2)；
The current input terminal of the first chopper circuit (1) electrically connects with the VDC anode in described intermediate dc loop, and the current output terminal of the first chopper circuit (1) electrically connects with the VDC negative terminal in described intermediate dc loop；
The current input terminal of the second chopper circuit (2) electrically connects with the VDC anode in described intermediate dc loop, and the current output terminal of the second chopper circuit (2) electrically connects with the VDC negative terminal in described intermediate dc loop；
First chopper circuit (1) and/or the second chopper circuit (2) exceed during preset value open-minded for the busbar voltage in described intermediate dc loop, consume a part of busbar voltage, so that busbar voltage is reduced to setting.
2. chopper circuit according to claim 1, it is characterised in that the first chopper circuit (1) including:
Insulated gate bipolar transistor IGBT device S17, current sensor TA1, resistance R2 and diode D1；
The C pole of described IGBT device S17 connects the VDC anode in described intermediate dc loop, the E pole of described IGBT device S17 connects one end of described current sensor TA1 and the negative electrode of described diode D1 respectively, and the other end of described current sensor TA1 connects one end of described resistance R2；The other end of described resistance R2 and the anode of described diode D1 connect the VDC negative terminal in described intermediate dc loop.
3. chopper circuit according to claim 2, it is characterised in that the G pole of described IGBT device S17 connects IGBT and drives.
4. chopper circuit according to claim 1, it is characterised in that the second chopper circuit (2) including:
Insulated gate bipolar transistor IGBT device S18, current sensor TA2, resistance R3 and diode D2；
The C pole of described IGBT device S18 connects the VDC anode in described intermediate dc loop, the E pole of described IGBT device S18 connects one end of described current sensor TA2 and the negative electrode of described diode D2 respectively, and the other end of described current sensor TA2 connects one end of described resistance R3；The other end of described resistance R3 and the anode of described diode D2 connect the VDC negative terminal in described intermediate dc loop.
5. chopper circuit according to claim 4, it is characterised in that the G pole of described IGBT device S18 connects IGBT and drives.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410720633.XA CN105720806A (en) | 2014-12-02 | 2014-12-02 | Chopper circuit |
| PCT/CN2014/094068 WO2016086461A1 (en) | 2014-12-02 | 2014-12-17 | Chopper circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410720633.XA CN105720806A (en) | 2014-12-02 | 2014-12-02 | Chopper circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105720806A true CN105720806A (en) | 2016-06-29 |
Family
ID=56090874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410720633.XA Pending CN105720806A (en) | 2014-12-02 | 2014-12-02 | Chopper circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105720806A (en) |
| WO (1) | WO2016086461A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111464032A (en) * | 2020-05-25 | 2020-07-28 | 台达电子企业管理（上海）有限公司 | Chopper circuit and control method thereof |
| CN116014788A (en) * | 2023-01-13 | 2023-04-25 | 中国华能集团清洁能源技术研究院有限公司 | Diode-based energy consumption device, flexible direct-current power transmission system and wind power generation system |
| CN116014726A (en) * | 2023-01-13 | 2023-04-25 | 华能(广东)能源开发有限公司 | Energy consumption device, flexible direct-current power transmission system and wind power generation system |
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- 2014-12-02 CN CN201410720633.XA patent/CN105720806A/en active Pending
- 2014-12-17 WO PCT/CN2014/094068 patent/WO2016086461A1/en active Application Filing
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| CN111464032A (en) * | 2020-05-25 | 2020-07-28 | 台达电子企业管理（上海）有限公司 | Chopper circuit and control method thereof |
| CN116014788A (en) * | 2023-01-13 | 2023-04-25 | 中国华能集团清洁能源技术研究院有限公司 | Diode-based energy consumption device, flexible direct-current power transmission system and wind power generation system |
| CN116014726A (en) * | 2023-01-13 | 2023-04-25 | 华能(广东)能源开发有限公司 | Energy consumption device, flexible direct-current power transmission system and wind power generation system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016086461A1 (en) | 2016-06-09 |
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Effective date of registration: 20170814 Address after: 100844 Fuxing Road, Beijing, Haidian District, No. 10 Applicant after: CHINA RAILWAY CORPORATION Applicant after: CRRC YONGJI ELECTRIC CO., LTD. Address before: 044502 Shanxi city of Yuncheng province Yongji City Motor Street No. 18 Applicant before: Yongji Xinshisu Motor Electrical Appliance Co., Ltd. |
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Application publication date: 20160629 |
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