CN206117517U - Do you be suitable for high -pressure high -power auxiliary converter 's preceding stage high frequency DC DC converter - Google Patents

Do you be suitable for high -pressure high -power auxiliary converter 's preceding stage high frequency DC DC converter Download PDF

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CN206117517U
CN206117517U CN201621134411.0U CN201621134411U CN206117517U CN 206117517 U CN206117517 U CN 206117517U CN 201621134411 U CN201621134411 U CN 201621134411U CN 206117517 U CN206117517 U CN 206117517U
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converter
rectifier
group
series
bridge
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刁利军
杜会卿
陈杰
王磊
尹少博
刘志刚
邱瑞昌
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Beijing Jiaotong University
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Beijing Jiaotong University
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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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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Abstract

The utility model relates to a do you be suitable for high -pressure high -power auxiliary converter's preceding stage high frequency DC DC converter. Including input filter inductance, half -bridge dc -to -ac converter, vice limit duplex winding high frequency isolation transformer, series connection diode full -bridge rectifier, auxiliary switch pipe, resonant capacitor and output LC wave filter. The converter can realize that the main switch is managed and the soft shutoff of zero current of auxiliary switch pipe, has reduced the switching loss of main switch pipe and auxiliary switch pipe on the one hand, has improved the efficiency of system, and on the other hand helps the improvement to use the converter system frequency of IGBT as the switch tube to reduce magnetic element's in the converter volume and weight, improved the power density of converter. In addition, rectifier module series system that the converter was selected for use has effectively reduced the rectifier diode voltage surge, two rectifier module sharing resonant capacitor and auxiliary switch pipe in addition, and the coupling who has effectively suppressed between two rectifier module leads to the fact the influence to resonance.

Description

A kind of preceding stage high frequency DC-DC converter for being suitable for high-power AuCT
Technical field
The utility model is related to DC-DC converter, more particularly to a kind of high-power auxiliary converter for being suitable for EMUs The preceding stage high frequency DC-DC converter of device.
Background technology
EMUs AuCT is the important component part of the electrified equipment of EMUs, and it is vehicle-mounted auxiliary electrical equipment Power supply, be responsible for exchange to the cooling blower of various kinds of equipment, the air compressor of on-board air conditioner, vehicle-mounted socket etc. electricity consumption set Available electricity.The performance quality of AuCT is not only related to the comfort level by bus of passenger, also affects vehicle-mounted Core equipment (such as Traction convertor etc.) safe and stable operation, and then the security to train operation causes crucial effect.Therefore, auxiliary is become The optimization design of stream device and research, for the production domesticization level for improving the electrified equipment of EMUs has particularly significant and far-reaching Meaning.
Traditional vehicle-mounted AuCT is broadly divided into " power frequency isolation " and " high-frequency isolation " two class.Wherein " high-frequency isolation " AuCT is increasingly received because it is in the excellent performance of the aspects such as volume of transformer reduction, weight reduction, Harmonics elimination To the favor of AuCT producer.However, being subject to power electronic devices to develop, Electro Magnetic Compatibility is poor, MOS switch dissipation is tight The impact of factor such as again, the high frequency development of AuCT receives certain restriction.
Therefore, it is very necessary to study EMUs AuCT novel high-frequency method.High frequency of the present utility model Change the high frequency technology that research is concentrated mainly on prime DC/DC link.
The content of the invention
For defect present in prior art, the purpose of this utility model is that a kind of applicable high-power of offer is auxiliary The preceding stage high frequency DC-DC converter of current transformer is helped, the Zero-current soft shut-off of main switch and auxiliary switch is realized.It is selected Rectification module series system effectively reduce commutation diode voltge surge.
To reach object above, the utility model is adopted the technical scheme that：
A kind of preceding stage high frequency DC-DC converter for being suitable for high-power AuCT, including：Input filter inductance L1, half-bridge inverter, secondary double winding high-frequency isolation transformer, series diode full-bridge rectifier, auxiliary switch Qr1, resonance Electric capacity CrWith output LC wave filters.
In the DC-DC converter, half-bridge inverter includes Support Capacitor C1, Support Capacitor C2, insulated gate bipolar crystal Pipe (IGBT) Q1With insulated gate bipolar transistor Q2, Support Capacitor C1And C2The branch road I being composed in series, with insulated gate bipolar Transistor Q1And Q2The branch road II being composed in series composes in parallel half-bridge inverter；
Insulated gate bipolar transistor Q1Anti-paralleled diode I, insulated gate bipolar transistor Q2Anti-paralleled diode II；
Secondary double winding high-frequency isolation transformer includes former limit, first group of secondary and second group of secondary；
Series diode full-bridge rectifier includes diode D1、D2、D3、D4、D5、D6、D7And D8, D1And D3It is composed in series Branch road III and D2And D4The branch road IV being composed in series composes in parallel first group of rectifier, D5And D7The branch road V being composed in series and D6With D8The branch road VI being composed in series composes in parallel second group of rectifier, and first group of rectifier and second group of rectifier are composed in series series connection Diode full-bridge rectifier；
Auxiliary switch Qr1Anti-paralleled diode III；
Output LC wave filters include filter inductance L and filter capacitor C.
In the DC-DC converter, input filter inductance L1The positive pole that is input into net side direct current of one end be connected, input filter Ripple inductance L1The other end be connected with the positive pole of half-bridge inverter.
The insulated gate bipolar transistor Q1With insulated gate bipolar transistor Q2The bridge arm midpoint of composition and secondary double wrap The Same Name of Ends of the former limit of group high-frequency isolation transformer passes through inductance Lr1It is connected, Support Capacitor C1With Support Capacitor C2The bridge arm of composition Midpoint is connected with the different name end of the former limit of secondary double winding high-frequency isolation transformer.
The Same Name of Ends and D of first group of secondary in the secondary double winding high-frequency isolation transformer1And D3The bridge arm midpoint of composition It is connected, the different name end of first group of secondary and D2And D4The bridge arm midpoint of composition passes through inductance Lr2It is connected；
The Same Name of Ends and D of second group of secondary in the secondary double winding high-frequency isolation transformer5And D7The bridge arm midpoint of composition It is connected, the different name end of second group of secondary and D6And D8The bridge arm midpoint of composition passes through inductance Lr3It is connected.
The positive pole of first group of rectifier in the series diode full-bridge rectifier and auxiliary switch Qr1Positive pole phase Even, the negative pole of first group of rectifier is connected with the positive pole of second group of rectifier, negative pole and the resonant capacitance C of second group of rectifierr Negative pole be connected, auxiliary switch Qr1Negative pole and resonant capacitance CrPositive pole be connected.
One end of filter inductance L and auxiliary switch Q in the output LC wave filtersr1Positive pole be connected, output LC filtering The other end of filter inductance L is connected with the positive pole of the filter capacitor C in output LC wave filters in device；
The resonant capacitance CrNegative pole be connected with the negative pole of filter capacitor C in output LC wave filters, output LC is filtered Filter inductance L in device exports DC voltage supply load R after being connected with the positive pole of filter capacitor C.
The utility model is had the advantage that compared with prior art：
1) the Zero-current soft shut-off of main switch and auxiliary switch is realized, main switch and auxiliary switch is reduced Switching loss, improve the efficiency of system.
2) volume and weight of magnetic element in converter (such as transformer, filter inductance) is reduced, converter is improve Power density.
3) resonant process only accounts for the small part of switch periods, and the loss of resonant element is greatly reduced, and improves system effect Rate.
4) the rectification module series system selected contributes to reducing commutation diode voltge surge.
5) two rectification module common resonant electric capacity and auxiliary switch, can effectively suppress the coupling between two rectification modules Cooperation to resonance with impacting.
6) for problem out of control during converter underloading, it is proposed that self adaptation solution.
Description of the drawings
The utility model has drawings described below：
Fig. 1 composition frame chart schematic diagrames of the present utility model
Fig. 2 main circuit principle schematics of the present utility model
Specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As illustrated, a kind of prime suitable for EMUs AuCT that Fig. 2 is provided for the utility model embodiment The main circuit principle schematic of DC-DC links.
In embodiment of the present utility model, a kind of prime DC- of the EMUs AuCT for being suitable for high-power DC converters, including input filter inductance L11st, half-bridge inverter 2, secondary double winding high-frequency isolation transformer 3, series diode Full-bridge rectifier 4, auxiliary switch Qr15th, resonant capacitance Cr6th, LC wave filters 7 are exported.
In the DC-DC converter, half-bridge inverter 2 includes Support Capacitor C1, Support Capacitor C2, insulated gate bipolar it is brilliant Body pipe (IGBT) Q1With insulated gate bipolar transistor Q2, Support Capacitor C1And C2The branch road I being composed in series, with insulated gate bipolar Transistor npn npn Q1And Q2The branch road II being composed in series composes in parallel half-bridge inverter 2；
The insulated gate bipolar transistor Q1Anti-paralleled diode I, insulated gate bipolar transistor Q2Anti-paralleled diode Ⅱ；
Secondary double winding high-frequency isolation transformer 3 includes former limit, first group of secondary and second group of secondary；
Series diode full-bridge rectifier 4 includes diode D1、D2、D3、D4、D5、D6、D7And D8, D1And D3It is composed in series Branch road III and D2And D4The branch road IV being composed in series composes in parallel first group of rectifier, D5And D7The branch road V being composed in series and D6With D8The branch road VI being composed in series composes in parallel second group of rectifier, and first group of rectifier and second group of rectifier are composed in series series connection Diode full-bridge rectifier 4；
The auxiliary switch Qr15 anti-paralleled diodes III；
Output LC wave filters 7 include filter inductance L and filter capacitor C.
In the DC-DC converter, input filter inductance L1The positive pole that 1 one end is input into net side direct current is connected, input Filter inductance L11 other end is connected with the positive pole of half-bridge inverter 2.
The insulated gate bipolar transistor Q1With insulated gate bipolar transistor Q2The bridge arm midpoint of composition and secondary double wrap The Same Name of Ends of the former limit of group high-frequency isolation transformer 3 passes through inductance Lr1It is connected, Support Capacitor C1With Support Capacitor C2The bridge of composition Arm midpoint is connected with the different name end of the former limit of secondary double winding high-frequency isolation transformer 3.
The Same Name of Ends and D of first group of secondary in the secondary double winding high-frequency isolation transformer 31And D3In the bridge arm of composition Point is connected, the different name end of first group of secondary and D2And D4The bridge arm midpoint of composition passes through inductance Lr2It is connected；
The Same Name of Ends and D of second group of secondary in the secondary double winding high-frequency isolation transformer 35And D7In the bridge arm of composition Point is connected, the different name end of second group of secondary and D6And D8The bridge arm midpoint of composition passes through inductance Lr3It is connected.
The positive pole of first group of rectifier in the series diode full-bridge rectifier 4 and auxiliary switch Qr15 positive pole It is connected, the negative pole of first group of rectifier is connected with the positive pole of second group of rectifier, the negative pole and resonant capacitance of second group of rectifier Cr6 negative pole is connected, auxiliary switch Qr15 negative pole and resonant capacitance Cr6 positive pole is connected.
One end of filter inductance L and auxiliary switch Q in the output LC wave filters 7r15 positive pole is connected, output LC filters The other end of filter inductance L is connected with the positive pole of the filter capacitor C in output LC wave filters 7 in ripple device 7；
The resonant capacitance Cr6 negative pole is connected with the negative pole of the filter capacitor C in output LC wave filters 7, output LC filters Filter inductance L in ripple device 7 exports DC voltage supply load R after being connected with the positive pole of filter capacitor C.
In the DC-DC converter, propose that a kind of Zero Current Switch (zero currentswitching, ZCS) PWM is accurate The Sofe Switch implementation method of resonance, realizes the zero-current switching of switching tube, reduces switching loss, improves system effectiveness.
In the DC-DC converter, ZCS soft switch techniques can improve the changer system frequency with IGBT as main switch Rate, contributes to reducing the volume and weight of magnetic element (such as transformer, filter inductance) in converter, so as to improve converter Power density.
In the DC-DC converter, using ZCS PWM quasi resonant convertor technologies, auxiliary switch and resonant capacitance string Connect, can freely control resonant capacitance when input coefficient, resonant process only accounts for the small part of switch periods, resonant element Loss is greatly reduced, and improves system effectiveness.
In the DC-DC converter, auxiliary switch Qr15 anti-paralleled diodes III and resonant capacitance Cr6 series connection, in two poles Under the cut-off effect of pipe III, resonant inductance electric current remains zero, is auxiliary switch Qr15 zero-current switching provides sufficient Time.
In the DC-DC converter, selected rectification module adopts series system, contributes to reducing commutation diode electricity Pressure impact.
In the DC-DC converter, two rectification module common resonant electric capacity Cr6 and auxiliary switch Qr15, can effectively press down Coupling between two rectification modules of system produces impact to resonance.
In the DC-DC converter, all load currents of current transformer are by resonant inductance, the stable situation of load current Under, the voltage that will not be born on resonant inductance produces impact, therefore load current does not affect on resonance.
In the DC-DC converter, for problem out of control during converter underloading, a kind of self adaptation solution is proposed, When i.e. load is below critical load, auxiliary switch Qr15 quit work, with auxiliary switch Qr1The resonant capacitance of 5 series connection Cr6 no longer discharge and recharges, effectively prevent converter from out-of-control phenomenon occur.
In the DC-DC converter, input filter inductance L11 is connected with half-bridge inverter 2, by input direct voltage inversion Export to secondary double winding high-frequency isolation transformer 3 for high-frequency ac voltage.The secondary of secondary double winding high-frequency isolation transformer 3 Connection series diode full-bridge rectifier 4, the output end of series diode full-bridge rectifier 4 with by auxiliary switch Qr15 is harmonious Shake electric capacity Cr6 auxiliary resonance loops in series are in parallel, and Jing after output LC wave filters 7 DC voltage supply load is exported.
The present embodiment realizes the zero-current switching of switching tube, reduces the switching loss of switching tube, improves system Efficiency.The volume and weight of magnetic element in converter is reduced, the power density of converter is improve.Resonant process is only accounted for out The small part in pass cycle, the loss of resonant element is greatly reduced, and the rectification module of selection is effectively reduced using series system Commutation diode voltge surge.For problem out of control during converter underloading, it is proposed that adaptive solution.
Above example only to illustrate the technical solution of the utility model, rather than a limitation；Although with reference to aforementioned reality Apply example to be described in detail the utility model, it will be understood by those within the art that：It still can be to front State the technical scheme described in each embodiment to modify, or equivalent is carried out to which part technical characteristic；And these Modification is replaced, and does not make the scope of each embodiment technical scheme of essence disengaging the utility model of appropriate technical solution.
The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.

Claims (6)

1. a kind of preceding stage high frequency DC-DC converter for being suitable for high-power AuCT, it is characterised in that：Including input filter Ripple inductance L1, half-bridge inverter, secondary double winding high-frequency isolation transformer, series diode full-bridge rectifier, auxiliary switch Qr1, resonant capacitance CrWith output LC wave filters；
In the DC-DC converter, half-bridge inverter includes Support Capacitor C1, Support Capacitor C2, insulated gate bipolar transistor Q1 With insulated gate bipolar transistor Q2；Support Capacitor C1And C2The branch road I being composed in series, with insulated gate bipolar transistor Q1And Q2 The branch road II being composed in series composes in parallel half-bridge inverter；
Insulated gate bipolar transistor Q1Anti-paralleled diode I, insulated gate bipolar transistor Q2Anti-paralleled diode II；
Secondary double winding high-frequency isolation transformer includes former limit, first group of secondary and second group of secondary；
Series diode full-bridge rectifier includes diode D1、D2、D3、D4、D5、D6、D7And D8, D1And D3The branch road III being composed in series With D2And D4The branch road IV being composed in series composes in parallel first group of rectifier, D5And D7The branch road V being composed in series and D6And D8Series connection The branch road VI of composition composes in parallel second group of rectifier, and first group of rectifier and second group of rectifier are composed in series series diode Full-bridge rectifier；
Auxiliary switch Qr1Anti-paralleled diode III；
Output LC wave filters include filter inductance L and filter capacitor C.
2. the preceding stage high frequency DC-DC converter of high-power AuCT is suitable for as claimed in claim 1, and its feature exists In：In the DC-DC converter, input filter inductance L1The positive pole that is input into net side direct current of one end be connected, input filter electricity Sense L1The other end be connected with the positive pole of half-bridge inverter.
3. the preceding stage high frequency DC-DC converter of high-power AuCT is suitable for as claimed in claim 1, and its feature exists In：The insulated gate bipolar transistor Q1With insulated gate bipolar transistor Q2The bridge arm midpoint of composition is high with secondary double winding The Same Name of Ends of the former limit of frequency isolating transformer passes through inductance Lr1It is connected, Support Capacitor C1With Support Capacitor C2The bridge arm midpoint of composition It is connected with the different name end of the former limit of secondary double winding high-frequency isolation transformer.
4. the preceding stage high frequency DC-DC converter of high-power AuCT is suitable for as claimed in claim 1, and its feature exists In：The Same Name of Ends and D of first group of secondary in the secondary double winding high-frequency isolation transformer1And D3The bridge arm midpoint of composition is connected, The different name end of first group of secondary and D2And D4The bridge arm midpoint of composition passes through inductance Lr2It is connected；
The Same Name of Ends and D of second group of secondary in the secondary double winding high-frequency isolation transformer5And D7The bridge arm midpoint phase of composition Even, the different name end of second group of secondary and D6And D8The bridge arm midpoint of composition passes through inductance Lr3It is connected.
5. the preceding stage high frequency DC-DC converter of high-power AuCT is suitable for as claimed in claim 1, and its feature exists In：The positive pole of first group of rectifier in the series diode full-bridge rectifier and auxiliary switch Qr1Positive pole be connected, the The negative pole of one group of rectifier is connected with the positive pole of second group of rectifier, negative pole and the resonant capacitance C of second group of rectifierrNegative pole It is connected, auxiliary switch Qr1Negative pole and resonant capacitance CrPositive pole be connected.
6. the preceding stage high frequency DC-DC converter of high-power AuCT is suitable for as claimed in claim 1, and its feature exists In：One end of filter inductance L and auxiliary switch Q in the output LC wave filtersr1Positive pole be connected, output LC wave filters in filter The other end of ripple inductance L is connected with the positive pole of the filter capacitor C in output LC wave filters；
The resonant capacitance CrNegative pole be connected with the negative pole of filter capacitor C in output LC wave filters, in exporting LC wave filters Filter inductance L exports DC voltage supply load R after being connected with the positive pole of filter capacitor C.
CN201621134411.0U 2016-10-18 2016-10-18 Do you be suitable for high -pressure high -power auxiliary converter 's preceding stage high frequency DC DC converter Active CN206117517U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106452084A (en) * 2016-10-18 2017-02-22 北京交通大学 Preceding-stage high-frequency DC-DC converter applicable to high-voltage large-power auxiliary convertor
CN107834581A (en) * 2017-10-24 2018-03-23 华南理工大学 A kind of battery energy storage system of Multiple coil resonance separate current control
CN110350800A (en) * 2019-07-16 2019-10-18 国网上海市电力公司 A kind of cathode protection of ship isolation type switch power current transformer being derived from bank electricity
CN110429824A (en) * 2019-08-08 2019-11-08 东北大学 A kind of two-way cascade input cascaded-output DC-DC transformation topology structure
CN112350598A (en) * 2020-09-29 2021-02-09 国电南瑞南京控制系统有限公司 Resonance zero current circuit
CN112737369A (en) * 2020-12-30 2021-04-30 江苏东方四通科技股份有限公司 High-precision conversion direct-current switching power supply

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106452084A (en) * 2016-10-18 2017-02-22 北京交通大学 Preceding-stage high-frequency DC-DC converter applicable to high-voltage large-power auxiliary convertor
CN107834581A (en) * 2017-10-24 2018-03-23 华南理工大学 A kind of battery energy storage system of Multiple coil resonance separate current control
CN110350800A (en) * 2019-07-16 2019-10-18 国网上海市电力公司 A kind of cathode protection of ship isolation type switch power current transformer being derived from bank electricity
CN110429824A (en) * 2019-08-08 2019-11-08 东北大学 A kind of two-way cascade input cascaded-output DC-DC transformation topology structure
CN112350598A (en) * 2020-09-29 2021-02-09 国电南瑞南京控制系统有限公司 Resonance zero current circuit
CN112350598B (en) * 2020-09-29 2022-07-01 国电南瑞南京控制系统有限公司 Resonance zero current circuit
CN112737369A (en) * 2020-12-30 2021-04-30 江苏东方四通科技股份有限公司 High-precision conversion direct-current switching power supply

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