CN105811766A - Boost-buck DC-DC converter for fuel cell vehicle - Google Patents
Boost-buck DC-DC converter for fuel cell vehicle Download PDFInfo
- Publication number
- CN105811766A CN105811766A CN201610305916.7A CN201610305916A CN105811766A CN 105811766 A CN105811766 A CN 105811766A CN 201610305916 A CN201610305916 A CN 201610305916A CN 105811766 A CN105811766 A CN 105811766A
- Authority
- CN
- China
- Prior art keywords
- converter
- igbt
- fuel cell
- power switching
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a boost-buck DC-DC converter for a fuel cell vehicle. The boost-buck DC-DC converter is connected between a fuel cell system and a DC bus and comprises a main circuit and a control circuit, wherein the main circuit comprises a switching power device (IGBT), a power diode, an inductor and a capacitor, the control circuit comprises a feedback control system, a pulse width modulation (PWM) driving circuit and a protection circuit, a digital signal processor (DSP) system is used for proportion integral (PI) closed-loop control on a current signal acquired by a sensor to obtain a PWM driving signal to be output to the IGBT, the switching state of the IGBT is controlled, and the output voltage of the DC-DC converter is further controlled. By the boost-buck DC-DC converter, the problem of boost-buck demand during voltage matching of a fuel cell and the DC bus in a power system of the fuel cell vehicle is mainly solved; when the voltage of the fuel cell is lower than the voltage of the DC bus, the DC-DC converter runs in a boost mode; and when the voltage of the fuel cell is higher than the voltage of the DC bus, the DC-DC converter runs in a buck mode. The DC-DC converter proposed by the invention belongs to a non-isolation DC-DC converter and has the characteristics of high-efficiency working.
Description
Technical field
The present invention relates to a kind of fuel-cell vehicle buck-boost type DC-DC converter, the effect of this changer is
Solve voltage decoupling and the problem of power control of fuel cell power system.
Background technology
New-energy automobile is considered as the development trend of future automobile, and the efficient and zero-emission of fuel cell car
The advantage of putting makes what its research and development became Domestic Automotive Industry to give priority to object.Fuel cell power system is combustion
The emphasis of material battery research and development.
Under normal circumstances, fuel cell power system mainly by fuel cell system (include fuel cell pile,
Fuel cell auxiliary equipment and fuel cell controller etc.), vehicle electric power electronic installation (as DC-DC convert
Device, inverter, electrical switch etc.), auxiliary power source (such as accumulator or ultracapacitor) and management
System, electro-mechanical machine controller etc. form.Auxiliary power source possess can charging and discharging capabilities, make up fuel cell
Peak power fan-out capability is poor and can not reclaim the shortcomings such as braking energy.Concrete fuel cell power system
As shown in Figure 1.
In fuel cell power system shown in Fig. 1, fuel cell output is connected with DC-DC converter,
The outfan of DC-DC converter is connected with dc bus.Auxiliary power source is (such as accumulator or super capacitor
Device) and be connected on dc bus.The Main Function of DC-DC converter is to whole fuel cell power system
Voltage decoupling and power control, thus reach control fuel cell output purpose.
When fuel battery voltage is less than busbar voltage, DC-DC converter operates in boost mode；When fuel electricity
When cell voltage is higher than busbar voltage, DC-DC converter operates in decompression mode.But current fuel cell automobile
There is problems in that, i.e. fuel battery voltage and DC bus-bar voltage in Fuel Cell Vehicle Powertrain
Timing existing boosting demand also has the problem of blood pressure lowering demand, so be required to realize stepping functions simultaneously
DC-DC converter meets such demand.There is now part DC-DC converter can realize rising simultaneously
Buck functionality, such as One Buck-Boost converter body, two-tube cascade DC-DC converter and isolated form DC-DC
Changer etc..But the existing DC-DC converter possessing stepping functions has a disadvantage in that
1) power device quantity is many, and structure is complicated, controls difficulty relatively big in actual application, buck-boost mode it
Between switching can cause bigger due to voltage spikes and current ripples；
2) power switch losses is big, causes DC-DC converter efficiency on the low side；
3) existing buck-boost type DC-DC converter many places are in theoretical simulation and small-power experimental stage, at automobile
In application also do not reach the requirement of variable working condition complicated, many；
4) controlling difficulty makes greatly the stability of existing buck-boost type DC-DC converter and Reliability comparotive low；
5) isolation type DC-DC converter is owing to there being transformator link, and work efficiency is relatively low.
In order to solve the problems referred to above, the present invention proposes a kind of buck-boost type DC-DC converter.
Summary of the invention
The invention aims to provide a kind of buck-boost type DC-DC converter for vehicle fuel battery system
In system, it is possible to achieve boosting regulation and the reduction regulation to fuel cell system output voltage.
In order to achieve the above object, the invention provides a kind of fuel-cell vehicle buck-boost type DC-DC conversion
Device, including main circuit and control circuit.
Main circuit includes two device for power switching (IGBT), four diodes, two inducers and four electricity
Container.Described device for power switching (IGBT) accept in main circuit control circuit PWM drive signal and
Determine to be operated in open or off state, thus complete the function of DC-DC converter buck.Described electricity
Sensor works as energy storage device in main circuit, in the duty that device for power switching (IGBT) is different
Determine storage or release energy.Affiliated capacitor acts primarily as the effect of energy storage and filtering in main circuit, protects
The error of card main circuit transmission signal is within tolerance interval.
Described control circuit is made up of feedback control system, PWM drive circuit and protection circuit.Described instead
Feedback control system includes sensor, dsp system and accessory power supply.The inductance of sensor Real-time Collection main circuit
Device current signal, dsp system carries out PI closed loop control to current signal and draws PWM drive signal, with PWM
Drive circuit is connected.The output of PWM drive circuit is connected with the gate pole of device for power switching (IGBT),
Output PWM drive signal, to device for power switching (IGBT), controls the switch of device for power switching (IGBT)
State, and then control the output voltage of described DC-DC converter.
Described protection circuit contrasts pwm signal and the reference signal of dsp system output by comparator, thus
Decide whether that output PWM drive signal, to the gate pole of device for power switching (IGBT), reaches to protect power to open
Close the effect of device (IGBT).
Further, during decompression mode, device for power switching S1 is operated on off state according to PWM drive signal,
And S2 completely closes；During boost mode, device for power switching S1 is constantly on, and S2 drives letter according to PWM
Number it is operated on off state.
The present invention is directed to changeable automobile-used operating mode, use jumbo power device, high-frequency switching technology and
Brand-new circuit topological structure design, proposes a kind of fuel-cell vehicle buck-boost type DC-DC converter, its
Have the advantage that compared to existing technology
1) the fuel-cell vehicle DC-DC converter of the present invention is by using jumbo power device, high frequency
Switching technique and brand-new Topology Structure Design, it is ensured that DC-DC converter high-power automobile-used under the conditions of
The reliability of work；
2) employing error signal is as feedback quantity input feedback control system, thus obtains PWM drive signal,
For controlling the on off state of device for power switching (IGBT), obtain high power density and high conversion frequency is
Effect；
3) utilize dsp system processing controls signal, instead of of the prior art utilize simulator produce signal
Mode, cost-effective, improve efficiency；
4) by increasing current-limiting protection and short circuit protection module, there is the situation of stream or short circuit at main circuit
Under, limit or close PWM duty cycle, it is ensured that DC-DC converter works in the secure mode, improving system
The reliability of system.
Accompanying drawing explanation
Fig. 1 is vehicle fuel battery power system architecture block diagram.
Fig. 2 is the DC-DC converter circuit schematic diagram that the present invention proposes.
Detailed description of the invention
Below in conjunction with schematic diagram, the detailed description of the invention of the DC-DC converter that the present invention proposes is carried out in more detail
Description.
As depicted in figs. 1 and 2, this example provides a kind of fuel-cell vehicle DC-DC converter, including:
As in figure 2 it is shown, DC-DC converter main circuit, including the first device for power switching (IGBT) S1 and
Second device for power switching (IGBT) S2, the first diode D1, the second diode D2, the 3rd diode D3
4th diode D4, the first inducer L1 and the first inducer L2 and the first capacitor C1, the second electric capacity
Device C2, the 3rd capacitor C3, the 4th capacitor C4 and the 5th capacitor C5.Described first power switch device
The colelctor electrode of part (IGBT) S1 negative electrode with the positive pole of input and described 3rd diode D3 respectively is connected,
Emitter stage respectively with the negative electrode of described first diode D1, the anode of described 3rd diode D3 and described
One end of first inducer L1 is connected.The colelctor electrode of described second device for power switching (IGBT) S2 is respectively
With the positive pole of input, the negative electrode of described 4th diode D4 and one end phase of described second capacitor C2
Connect, emitter stage respectively with one end of described second inducer L2, described second diode D2 negative electrode with
And the anode of described 4th diode D4 is connected.The anode of described first diode D1 respectively with input
Negative pole and one end of described first capacitor C1 be connected, the anode of described second diode D2 and institute
The other end stating the second capacitor C2 is connected.The other end of described first inducer L1 and described first electricity
The other end of container C1 is connected, and the other end of described second inducer L2 is connected with the negative pole of input.
One end of described 3rd capacitor C3 is connected with the positive pole of input, and the other end is connected with the negative pole of input
Connect.One end of described 4th capacitor C4 is connected with the positive pole of outfan, the other end and the negative pole of outfan
It is connected.
Described control circuit is made up of feedback control system, PWM drive circuit and protection circuit.
As in figure 2 it is shown, described feedback control system includes sensor, dsp system and accessory power supply.Sensing
The inductor current signal of device Real-time Collection main circuit, dsp system carries out PI closed loop control to current signal and obtains
Go out PWM drive signal, be connected with PWM drive circuit.The output of PWM drive circuit and device for power switching
(IGBT) gate pole is connected, and output PWM drive signal, to device for power switching (IGBT), controls power
The on off state of switching device (IGBT), and then control the output voltage of described DC-DC converter.Wherein
During decompression mode, device for power switching S1 receives PWM drive signal, and S2 closes；Power switch during boost mode
Device S1 is constantly on, and S2 receives PWM drive signal.
Described protection circuit contrasts pwm signal and the reference signal of dsp system output by comparator, thus
Decide whether that output PWM drive signal, to the gate pole of device for power switching (IGBT), reaches to protect power to open
Close the effect of device (IGBT).
The present invention has completed the experiment under limit and dynamic condition under the conditions of high-power, achieves relatively
Good Expected Results.Above are only the preferred embodiment of the present invention, the present invention is not played restriction effect.Appoint
Technical scheme proposed by the invention and technology contents are made the variation of equivalent or amendment by what, all belong to this
Bright technical scheme content, within still falling within protection scope of the present invention.
Claims (2)
1. a fuel-cell vehicle buck-boost type DC-DC converter, it is characterised in that it by main circuit and
Control circuit forms；
Main circuit includes two device for power switching (IGBT), four diodes, two inducers and four electricity
Container.The colelctor electrode of described first device for power switching respectively with input anode and described 3rd diode
Negative electrode is connected, emitter stage respectively with the negative electrode of described first diode, described 3rd diode anode with
And one end of described first inducer is connected.The colelctor electrode of described second device for power switching (IGBT) divides
It is not connected with one end of input anode, the negative electrode of described 4th diode and described second capacitor,
Emitter stage respectively with one end of described second inducer, the negative electrode of described second diode and the described 4th 2
The anode of pole pipe is connected.The anode of described first diode is electric with input cathode and described first respectively
One end of container is connected, and the anode of described second diode is connected with the other end of described second capacitor.
The other end of described first inducer is connected with the other end of described first capacitor, described second inducer
The other end be connected with input cathode.One end of described 3rd capacitor is connected with input anode,
The other end is connected with input cathode.One end of described 4th capacitor is connected with output head anode, separately
One end is connected with negative pole of output end.
Described control circuit is made up of feedback control system, PWM drive circuit and protection circuit.Described instead
Feedback control system includes sensor, dsp system and accessory power supply.The inductance of sensor Real-time Collection main circuit
Device current signal, dsp system carries out PI closed loop control to current signal, draws PWM drive signal, with PWM
Drive circuit is connected.The output of PWM drive circuit is connected with the gate pole of device for power switching (IGBT),
Output PWM drive signal, to device for power switching (IGBT), controls the switch of device for power switching (IGBT)
State, and then control the output voltage of described DC-DC converter.
Described protection circuit contrasts pwm signal and the reference signal of dsp system output by comparator, thus
Decide whether that output PWM drive signal, to the gate pole of device for power switching (IGBT), reaches to protect power to open
Close the purpose of device (IGBT).
2. fuel-cell vehicle DC-DC converter as claimed in claim 1, it is characterised in that blood pressure lowering mould
During formula, device for power switching S1 is operated on off state according to PWM drive signal, and S2 completely closes；Rise
During die pressing type, device for power switching S1 is constantly on, and S2 is operated on off state according to PWM drive signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610305916.7A CN105811766A (en) | 2016-05-10 | 2016-05-10 | Boost-buck DC-DC converter for fuel cell vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610305916.7A CN105811766A (en) | 2016-05-10 | 2016-05-10 | Boost-buck DC-DC converter for fuel cell vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105811766A true CN105811766A (en) | 2016-07-27 |
Family
ID=56456556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610305916.7A Pending CN105811766A (en) | 2016-05-10 | 2016-05-10 | Boost-buck DC-DC converter for fuel cell vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105811766A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069921A (en) * | 2017-01-23 | 2017-08-18 | 中国科学院青岛生物能源与过程研究所 | The long long-life high-energy-density unmanned plane integrated drive generator of continuation of the journey of one kind |
| CN109247045A (en) * | 2016-08-30 | 2019-01-18 | 株式会社Lg化学 | For the control system by DC-DC electric pressure converter from reduced pressure operation mode conversion to secure mode of operation |
| CN109256946A (en) * | 2018-09-25 | 2019-01-22 | 哈尔滨理工大学 | A kind of high-gain fuel cell car DC/DC converter |
| CN113525106A (en) * | 2020-04-13 | 2021-10-22 | 广州汽车集团股份有限公司 | DC/DC converter and control method thereof |
| CN117856624A (en) * | 2024-01-17 | 2024-04-09 | 湖南大学 | Wide-range buck-boost direct current converter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335466A (en) * | 2007-06-26 | 2008-12-31 | 住友重机械工程服务株式会社 | Hybrid power supply device |
| CN101552554A (en) * | 2009-05-11 | 2009-10-07 | 南京航空航天大学 | Control circuit of cascade type buck-boost converter and control method thereof |
| CN101777840A (en) * | 2010-02-25 | 2010-07-14 | 北京航空航天大学 | Buck-boost composite DC/DC converter |
| CN203086341U (en) * | 2013-03-06 | 2013-07-24 | 广东欧珀移动通信有限公司 | DC-DC (Direct Current to Direct Current) circuit |
| CN204258631U (en) * | 2014-11-25 | 2015-04-08 | 成都芯源***有限公司 | Multi-mode switching circuit |
-
2016
- 2016-05-10 CN CN201610305916.7A patent/CN105811766A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335466A (en) * | 2007-06-26 | 2008-12-31 | 住友重机械工程服务株式会社 | Hybrid power supply device |
| CN101552554A (en) * | 2009-05-11 | 2009-10-07 | 南京航空航天大学 | Control circuit of cascade type buck-boost converter and control method thereof |
| CN101777840A (en) * | 2010-02-25 | 2010-07-14 | 北京航空航天大学 | Buck-boost composite DC/DC converter |
| CN203086341U (en) * | 2013-03-06 | 2013-07-24 | 广东欧珀移动通信有限公司 | DC-DC (Direct Current to Direct Current) circuit |
| CN204258631U (en) * | 2014-11-25 | 2015-04-08 | 成都芯源***有限公司 | Multi-mode switching circuit |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109247045A (en) * | 2016-08-30 | 2019-01-18 | 株式会社Lg化学 | For the control system by DC-DC electric pressure converter from reduced pressure operation mode conversion to secure mode of operation |
| CN109247045B (en) * | 2016-08-30 | 2020-09-04 | 株式会社Lg化学 | Control system for converting a DC-DC voltage converter from a buck mode of operation to a safe mode of operation |
| CN107069921A (en) * | 2017-01-23 | 2017-08-18 | 中国科学院青岛生物能源与过程研究所 | The long long-life high-energy-density unmanned plane integrated drive generator of continuation of the journey of one kind |
| CN109256946A (en) * | 2018-09-25 | 2019-01-22 | 哈尔滨理工大学 | A kind of high-gain fuel cell car DC/DC converter |
| CN109256946B (en) * | 2018-09-25 | 2020-03-06 | 哈尔滨理工大学 | High-gain fuel cell automobile DC/DC converter |
| CN113525106A (en) * | 2020-04-13 | 2021-10-22 | 广州汽车集团股份有限公司 | DC/DC converter and control method thereof |
| CN113525106B (en) * | 2020-04-13 | 2023-11-17 | 广州汽车集团股份有限公司 | DC/DC converter and control method thereof |
| CN117856624A (en) * | 2024-01-17 | 2024-04-09 | 湖南大学 | Wide-range buck-boost direct current converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Kwon et al. | High gain soft-switching bidirectional DC–DC converter for eco-friendly vehicles | |
| CN101976894B (en) | Energy storage system realizing bidirectional electric energy flow and control method thereof | |
| CN105811766A (en) | Boost-buck DC-DC converter for fuel cell vehicle | |
| Dusmez et al. | A novel low cost integrated on-board charger topology for electric vehicles and plug-in hybrid electric vehicles | |
| CN107968471B (en) | LCLC resonance circuit, wide-range constant-power output direct-current charger and control method | |
| CN204633600U (en) | A kind of novel crisscross parallel topology structure of stepping-up/stepping-down chopper circuit | |
| CN204210320U (en) | Based on the DC/DC control system of electronlmobil regenerative brake | |
| CN103312020B (en) | Hybrid Vehicle composite power source is controlled based on Modified Filter power dividing | |
| CN104578773B (en) | Soft switching circuit for bidirectional DC/DC (direct current/direct current) converter and control method | |
| CN106427616B (en) | A kind of composite power source based on charge pump and its switching method in different operating modes | |
| CN103872729B (en) | The hybrid electric vehicle composite power source that sef-adapting filter power dividing controls and method | |
| CN106427615A (en) | Composite power source control system and switching method thereof under different work conditions | |
| CN104108320A (en) | N-PMOS switch decoupling hybrid power system for electric automobile and energy control method thereof | |
| CN105514939A (en) | Charging and discharging control device and control method for energy storage super-capacitor of electric workover rig | |
| CN108400709A (en) | A kind of two-way DC/DC converters of integrated three level of bipolarity of crisscross parallel magnetic | |
| Gu et al. | High efficiency LLC DCX battery chargers with sinusoidal power decoupling control | |
| CN104648166A (en) | Vehicle-mounted composite power supply regenerative braking energy recovery system and method | |
| CN105939107A (en) | Hybrid type quasi-switch voltage-boosting DC-DC converter | |
| CN202474879U (en) | DC (direct current) bus ternary Buck-Boost two-way DC-DC voltage-stabilizing energy storage system | |
| CN202513629U (en) | Capacitor charging-discharging control device for electric automobiles | |
| CN106143168A (en) | The multi-channel parallel of a kind of electric automobile interlocks output type mixed energy storage system and method | |
| CN203747469U (en) | Hybrid vehicle hybrid power supply of self-adaptive filter power dividing control | |
| CN105790408B (en) | Efficient low power proton exchange membrane fuel cell and lithium battery hybrid power system | |
| CN103023313B (en) | Voltage division step-down Cuk converter circuit | |
| CN206226052U (en) | A kind of mixed motor-car 42V/12V bilayer direct current convert charging devices |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160727 |
|
| WD01 | Invention patent application deemed withdrawn after publication |