CN110445375A - A kind of three port DC/DC converters of high-power charging - Google Patents
A kind of three port DC/DC converters of high-power charging Download PDFInfo
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- CN110445375A CN110445375A CN201910757341.6A CN201910757341A CN110445375A CN 110445375 A CN110445375 A CN 110445375A CN 201910757341 A CN201910757341 A CN 201910757341A CN 110445375 A CN110445375 A CN 110445375A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
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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
- 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
-
- 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
- H02M3/157—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 with digital control
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/10—DC to DC converters
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of three port DC/DC converters of high-power charging, belong to Automobile drive and control technology field.The present invention solves the problems, such as that traditional non-isolated buck topology can not freely realize high-power charging and control the demand of the free charge and discharge of battery simultaneously.Input capacitance of the invention is in parallel with voltage source；The drain electrode of voltage source anode connection switch pipe Q1, the cathode of the source electrode connection diode D1 of switching tube Q1, the anode connection voltage source negative pole of diode D1；The cathode of the source electrode connection diode D1 of switching tube Q2, the cathode of the drain electrode connection diode D2 of switching tube Q2, the anode connection battery positive voltage of diode D2, battery terminal negative connect the anode of diode D1；The source electrode of one end connection switch pipe Q2 of inductance L1, the drain electrode of the other end connection switch pipe Q3 of inductance L1, the anode of the source electrode connection diode D3 of switching tube Q3, the cathode of diode D3 connect battery positive voltage；One end connection switch pipe Q3 of output capacitance drains, and the other end of output capacitance connects battery terminal negative.The present invention is suitable for Automobile drive and control uses.
Description
Technical field
The invention belongs to Automobile drives and control technology field.
Background technique
With the popularization of new-energy automobile, fuel cell car has obstructed overheated machine process, not by the limit of Carnot cycle
System, energy conversion efficiency is high, the incomparable advantage of internal-combustion engines vehicles such as environmental-friendly, while still can keep conventional internal combustion
Machine automobile high-speed degree, over long distances traveling and the performances such as safety, comfortable, it is considered to be the cleaning of 21 century first choice, efficient transportation work
Tool.But fuel cell car is when using fuel cell-powered, it is necessary to attached between fuel cell output end and charging port
Add AC/DC (ac/dc) converter, and cascade the converter of a three port DC/DC, just can solve power grid high-voltage end to negative
The demand of load and storage battery power supply, while realizing that battery can according to need the demand of electric discharge.
The function of cascade converter is to guarantee that power grid output voltage is reduced to stable after desired level export to load end
And battery, while battery can be energized when power grid end can not export for load end.The high-power charging of fuel cell car
While meeting the functions such as high step-down ratio, high efficiency, take into account reduces cost, improves stability and power density system.Currently
The research of fuel cell car charging system is concentrated mainly in isolated and non-isolated topology.High-power charging system every
From formula topology because there is the presence of coupling transformer, cause its volume big, at high cost, relatively inefficient；Traditional is non-isolated
Although buck topology dynamic response is good, high-efficient, the free charge and discharge of battery is realized while being unable to satisfy high-power charging
The demand of electricity.
Summary of the invention
While cannot achieve high-power charging the invention aims to solve traditional non-isolated buck topology structure
The problem of accumulator cell charging and discharging freedom.Propose a kind of three port DC/DC converters of high-power charging.
High-power charging of the present invention is included input capacitance Cin, is opened with three port DC/DC converters, the converter
Close pipe Q1, switching tube Q2, switching tube Q3, diode D1, diode D2, diode D3, inductance L1 and output capacitance Co；
The anode of one end connection voltage source Uin of input capacitance Cin, the other end of input capacitance Cin connect voltage source Uin
Cathode；
The drain electrode of the positive connection switch pipe Q1 of voltage source Uin, the cathode of the source electrode connection diode D1 of switching tube Q1, two
The cathode of the anode connection voltage source Uin of pole pipe D1；
The cathode of the source electrode connection diode D1 of switching tube Q2, the cathode of the drain electrode connection diode D2 of switching tube Q2, two
The anode of the anode connection battery Ub of pole pipe D2, the anode of the cathode connection diode D1 of battery Ub；
The source electrode of one end connection switch pipe Q2 of inductance L1, the drain electrode of the other end connection switch pipe Q3 of inductance L1, switch
The anode of the source electrode connection diode D3 of pipe Q3, the anode of the cathode connection battery Ub of diode D3；
One end connection switch pipe Q3 of output capacitance Co drains, and the other end connection battery Ub's of output capacitance Co is negative
Pole, the both ends of output capacitance Co are three port DC/DC converters
It further, further include control circuit, the control circuit is used for control switch pipe Q1, switching tube Q2 and switching tube
Q3's opens or closes；
The control circuit includes protection circuit 1, dsp system 2, voltage sensor 3 and current sensor 4；
Voltage sensor 3 is for the output voltage of real-time detection voltage source Uin and the output electricity of three port DC/DC converters
Pressure；And the voltage signal that will test is sent to dsp system 2；
Current sensor 4 is used for the output electric current of real-time detection voltage source Uin, and the current signal of acquisition is sent to
Dsp system 2；
The current signal that dsp system 2 is used to receive the voltage signal of the output of voltage sensor 3 and current sensor 4 exports,
The real output of three port DC/DC converters is calculated, while receiving target voltage and current signal, calculates target output work
Rate compares the real output of three port DC/DC converters and target output, according to power contrast as a result,
Three tunnel PWM waves are generated, tri- tunnel PWM wave of Bing Jiang is sent to protection circuit 1 as driving signal；
Protection circuit 1 is used to receive the switching tube driving signal of the transmission of dsp system 2, to dsp system 2 and three port DC/DC
Converter carries out electrical isolation；Switching tube driving signal is sent to the grid of switching tube Q1, the grid and switch of switching tube Q2
The grid of pipe Q3, switch tube Q1, switching tube Q2 and switching tube Q3 are driven.
Three ports DC/DC converter of the present invention can increase considerably output power, solve fuel cell and be negative
End is carried, while fuel cell, battery and output end can be integrated into an entirety by its distinctive three port, be improved whole
Power density.The present invention does not have isolating device between load end and charging port, improves transducer effciency；And institute of the present invention
The advantages of charging port, battery and load are integrated on a converter by the three port topology structures stated, this structure are as follows: mention
High dynamical system power density；Reduce dynamical system volume；Mention charging port more easily to charge the battery while
High charging rate.
Detailed description of the invention
Fig. 1 is the circuit diagram of the present invention that DC/DC converter is used based on the charging of three ports；
Equivalent circuit diagram when Fig. 2 is based on three ports charging DC/DC converter single-input double-output mode；
Working mould when switching tube is connected when Fig. 3 is based on three ports charging DC/DC converter single-input double-output mode
State figure；
Load port U when Fig. 4 is based on three ports charging DC/DC converter single-input single-output modeoRequired power
Equivalent circuit diagram when output power greater than voltage source Uin；
Working mould when switching tube is connected when Fig. 5 is based on three ports charging DC/DC converter single-input single-output mode
State figure；
Equivalent circuit diagram when Fig. 6 is based on three ports charging DC/DC converter dual input list output mode；
Work when switching tube when Fig. 7 is based on three ports charging DC/DC converter dual input list output mode is connected
Modal graph；
Fig. 8 is the control electrical principle block diagram based on three ports charging DC/DC converter and its control circuit.
Specific embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, how to apply to the present invention whereby
Technological means solves technical problem, and the realization process for reaching relevant art effect can fully understand and implement.This Shen
Please each feature in embodiment and embodiment, can be combined with each other under the premise of not colliding, be formed by technical solution
It is within the scope of the present invention.
Specific embodiment 1: illustrate present embodiment below with reference to Fig. 1, high-power charging described in present embodiment is with three
Port DC/DC converter, the converter include input capacitance Cin, switching tube Q1, switching tube Q2, switching tube Q3, diode D1,
Diode D2, diode D3, inductance L1 and output capacitance Co；
The anode of one end connection voltage source Uin of input capacitance Cin, the other end of input capacitance Cin connect voltage source Uin
Cathode；
The drain electrode of the positive connection switch pipe Q1 of voltage source Uin, the cathode of the source electrode connection diode D1 of switching tube Q1, two
The cathode of the anode connection voltage source Uin of pole pipe D1；
The cathode of the source electrode connection diode D1 of switching tube Q2, the cathode of the drain electrode connection diode D2 of switching tube Q2, two
The anode of the anode connection battery Ub of pole pipe D2, the anode of the cathode connection diode D1 of battery Ub；
The source electrode of one end connection switch pipe Q2 of inductance L1, the drain electrode of the other end connection switch pipe Q3 of inductance L1, switch
The anode of the source electrode connection diode D3 of pipe Q3, the anode of the cathode connection battery Ub of diode D3；
One end connection switch pipe Q3 of output capacitance Co drains, and the other end connection battery Ub's of output capacitance Co is negative
Pole, the both ends of output capacitance Co are the load supplying end Uo of three port DC/DC converters.
With three port DC/DC converters tool, there are three types of different operation modes for high-power charging of the present invention, respectively
For single output dual input mode, single output single input mode and dual output single input mode；It can be according to battery and load end not
Same power demand is adjusted.It can satisfy power grid-load, the multipotency amount flow direction between power grid-battery and battery-load,
Freely realize the demand of high-power charging and the free charge and discharge of battery；Work is in any mode, related switch
Pipe is controlled by the PWM wave that DSP is generated.
Further, in present embodiment, high-power charging includes single-input double-output mould with three port DC/DC converters
Formula, single-input single-output mode and dual input list output mode；Equivalent circuit such as Fig. 2 institute when the single-input double-output mode
Show:
The equivalent circuit of single-input double-output mode: including input capacitance Cin, switching tube Q1, switching tube Q3, diode
D1, diode D3, inductance L1 and output capacitance Co；
The anode of one end connection voltage source Uin of input capacitance Cin, the other end of input capacitance Cin connect voltage source Uin
Cathode；
The drain electrode of the positive connection switch pipe Q1 of voltage source Uin, the cathode of the source electrode connection diode D1 of switching tube Q1, two
The cathode of the anode connection voltage source Uin of pole pipe D1；The source electrode of one end connection switch pipe Q1 of inductance L1, the other end of inductance L1
Connection switch pipe Q3 drain electrode, the anode of the source electrode connection diode D3 of switching tube Q3, the cathode of diode D3 connect battery Ub
Anode；The anode of the cathode connection diode D1 of battery Ub；One end connection switch pipe Q3 of output capacitance Co drains, output
The cathode of the other end connection battery Ub of capacitor Co, the both ends of output capacitance Co are that the load of three port DC/DC converters supplies
Electric end Uo.
When single-input double-output mode, when the power needed for loading is less than charging port output power, voltage source Uin is negative
It carries end and battery provides energy, switching tube Q3 remains that opening state, switching tube Q2 remain off state, at one
PWM cycle tonIn period, switching tube Q1 and switching tube Q3 are simultaneously turned on, and voltage source Uin passes through switching tube Q1 and Q3 pairs of switching tube
Battery UbIt charges, while to load end UoEnergy is provided.The mode of switching tube is as shown in Figure 3.
Further, in present embodiment, the equivalent circuit of single-input single-output mode is as shown in Figure 4: single input list is defeated
Equivalent circuit when mode includes switching tube Q2, diode D2, inductance L1 and output capacitance Co out；
The cathode of the drain electrode connection diode D2 of switching tube Q2, the anode of the anode connection battery Ub of diode D2, stores
One end of the cathode connection output capacitance Co of battery Ub, one end of the other end connection inductance L1 of output capacitance Co, inductance L1's
The source electrode of other end connection switch pipe Q2；
The both ends of output capacitance Co are the load supplying end Uo of three port DC/DC converters.
It, can only be by electric power storage when voltage source Uin can not carry out output or switching tube Q1 closing when single-input single-output mode
Pond UbTo load port UoEnergy is provided；The mode lower switch pipe Q1 and Q3 are held off, and voltage source Uin output is 0, switching tube
Q2 is tended to remain on；In tonIn period, switching tube Q2 conducting, battery UbIt powers to load port Uo.The mode of switching tube
As shown in Figure 5.
Further, in present embodiment, equivalent circuit when dual input list output mode is as shown in Figure 6: dual input list
The equivalent circuit of output mode includes input capacitance Cin, switching tube Q1, switching tube Q2, diode D1, diode D2, inductance L1
With output capacitance Co；
The anode of one end connection voltage source Uin of input capacitance Cin, the other end of input capacitance Cin connect voltage source Uin
Cathode；
The drain electrode of the positive connection switch pipe Q1 of voltage source Uin, the cathode of the source electrode connection diode D1 of switching tube Q1, two
The cathode of the anode connection voltage source Uin of pole pipe D1；
The cathode of the source electrode connection diode D1 of switching tube Q2, the cathode of the drain electrode connection diode D2 of switching tube Q2, two
The anode of the anode connection battery Ub of pole pipe D2, the anode of the cathode connection diode D1 of battery Ub；
The source electrode of one end connection switch pipe Q2 of inductance L1, one end of the other end connection output capacitance Co of inductance L1 are defeated
The cathode of the other end connection battery Ub of capacitor Co out, the both ends of output capacitance Co are the load of three port DC/DC converters
Feeder ear Uo.
When the dual input list output of three port DC/DC converters of high-power charging, the power (mesh needed for load port Uo
Mark power) be greater than voltage source Uin output power when: switching tube Q3 remains that off state, switching tube Q1 and Q2 are led simultaneously
Logical or shutdown, within a PWM cycle ton period, switching tube Q1 and Q2 are simultaneously turned on, at this time voltage source Uin and battery Ub
It is charged by Q1 and Q2 to load end Uo.The operation mode switched is as shown in Figure 7.
Topological structure of the present invention tool is voltage source Uin respectively there are three port, the port battery Ub and defeated
Exit port Uo, by voltage source Uin, battery and output end are incorporated into a topological structure and dynamical system power can be improved
Density；In addition, battery Ub, diode D2, switching tube Q2, output capacitance Co, output end Uo constitute single-input single-output mode,
I.e. electric car provides voltage to output end load end Uo by battery in the Uin operational process of out-off voltage source, defeated to meet
The power demand of outlet；Voltage source Uin, battery Ub, diode D1, D2, D3, switching tube Q1, Q2, Q3, output capacitance Co are defeated
Outlet Uo, switching tube Q1 remain conducting, when switching tube Q3 conducting, as single-input double-output mode, and electric power storage at this time
Pond Ub is equivalent to a load, by voltage source Uin is that battery Ub and load end Uo provide voltage by power grid, when battery exists
When charging, switching tube Q2 is closed, diode D3 forward conduction, is simultaneously at this time battery and load end Uo for voltage source Uin
That is the process that charges of electric car；When switching tube Q2 and Q1 are simultaneously turned on, it is considered as dual input list output mode, at this moment opens
It closes pipe Q1 and Q2 to simultaneously turn on, switching tube Q3 shutdown, the port voltage source Uin and battery are simultaneously load end Uo i.e. electric car
Power supply.
Further, present embodiment further includes control circuit, and the control circuit is for control switch pipe Q1, switch
Pipe Q2's and switching tube Q3 opens or closes；
Voltage sensor 3 is for the output voltage of real-time detection voltage source Uin and the output electricity of three port DC/DC converters
Pressure；And the voltage signal that will test is sent to dsp system 2；
Current sensor 4 is used for the output electric current of real-time detection voltage source Uin, and the current signal of acquisition is sent to
Dsp system 2；
The current signal that dsp system 2 is used to receive the voltage signal of the output of voltage sensor 3 and current sensor 4 exports,
The real output of three port DC/DC converters is calculated, while receiving target voltage and current signal, calculates target output work
Rate compares the real output of three port DC/DC converters and target output, according to power contrast as a result,
Three tunnel PWM waves are generated, tri- tunnel PWM wave of Bing Jiang is sent to protection circuit 1 as driving signal；
Protection circuit 1 is used to receive the switching tube driving signal of the transmission of dsp system 2, to dsp system 2 and three port DC/DC
Converter carries out electrical isolation；Switching tube driving signal is sent to the grid of switching tube Q1, the grid and switch of switching tube Q2
The grid of pipe Q3, switch tube Q1, switching tube Q2 and switching tube Q3 are driven.
Shown in concrete application implementation example figure 8 of the invention: determining that the size between charging port and demand power is closed first
System, and then the work of three Port Translation devices is determined in dual input list output mode, single-input double-output mode or single input list are defeated
Mode out；If single-input double-output, Q2 is turned off always, and switching tube Q1 and Q3 are switched on or off simultaneously.Controller uses DSP, electricity
The output voltage of pressure sensor real-time detection charging input voltage and DC/DC converter, detection signal pass through the AD that DSP is carried and turn
Parallel operation sends DSP to, and DSP presets mentioned-above control program, the identical PWM wave in three tunnels is generated, using dedicated
The conducting and shutdown of switching tube isolation drive control switch pipe, to realize the work to charging port output voltage stabilization function
With.If dual input list output mode, switching tube Q1 and Q2 are switched on or off simultaneously, and Q3 is turned off always, to realize voltage source
Uin and battery provide energy to load end Uo simultaneously.If single-input single-output mode, switching tube Q2 is open-minded always, switch
Pipe Q1 and Q3 are turned off always, only have battery to provide energy to load end Uo to realize.
Although disclosed herein embodiment it is as above, the content is only to facilitate understanding the present invention and adopting
Embodiment is not intended to limit the invention.Any those skilled in the art to which this invention pertains are not departing from this
Under the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But scope of patent protection of the invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (7)
1. a kind of three port DC/DC converters of high-power charging, which is characterized in that the converter includes input capacitance Cin, opens
Close pipe Q1, switching tube Q2, switching tube Q3, diode D1, diode D2, diode D3, inductance L1 and output capacitance Co；
The anode of one end connection voltage source Uin of input capacitance Cin, the other end connection voltage source Uin's of input capacitance Cin is negative
Pole；
The drain electrode of the positive connection switch pipe Q1 of voltage source Uin, the cathode of the source electrode connection diode D1 of switching tube Q1, diode
The cathode of the anode connection voltage source Uin of D1；
The cathode of the source electrode connection diode D1 of switching tube Q2, the cathode of the drain electrode connection diode D2 of switching tube Q2, diode
The anode of anode connection battery (Ub) of D2, the anode of the cathode connection diode D1 of battery (Ub)；
The source electrode of one end connection switch pipe Q2 of inductance L1, the drain electrode of the other end connection switch pipe Q3 of inductance L1, switching tube Q3
Source electrode connection diode D3 anode, diode D3 cathode connection battery (Ub) anode；
One end connection switch pipe Q3 of output capacitance Co drains, the cathode of other end connection battery (Ub) of output capacitance Co,
The both ends of output capacitance Co are the load supplying end Uo of three port DC/DC converters.
2. three port DC/DC converters of a kind of high-power charging according to claim 1, which is characterized in that the converter
It is divided into single-input double-output mode, single-input single-output mode and dual input list output mode.
3. three port DC/DC converters of a kind of high-power charging according to claim 2, which is characterized in that single input is double
The equivalent circuit of output mode: including input capacitance Cin, switching tube Q1, switching tube Q3, diode D1, diode D3, inductance L1
With output capacitance Co；
The anode of one end connection voltage source Uin of input capacitance Cin, the other end connection voltage source Uin's of input capacitance Cin is negative
Pole；
The drain electrode of the positive connection switch pipe Q1 of voltage source Uin, the cathode of the source electrode connection diode D1 of switching tube Q1, diode
The cathode of the anode connection voltage source Uin of D1；The source electrode of one end connection switch pipe Q1 of inductance L1, the other end connection of inductance L1
Switching tube Q3 drain electrode, the anode of the source electrode connection diode D3 of switching tube Q3, cathode connection battery (Ub) of diode D3
Anode；The anode of the cathode connection diode D1 of battery (Ub)；One end connection switch pipe Q3 of output capacitance Co drains, output
The cathode of other end connection battery (Ub) of capacitor Co, the both ends of output capacitance Co are the negative of three port DC/DC converters
Carry feeder ear Uo.
4. three port DC/DC converters of a kind of high-power charging according to claim 2, which is characterized in that single input list
Equivalent circuit when output mode are as follows: including switching tube Q2, diode D2, inductance L1 and output capacitance Co；
The cathode of the drain electrode connection diode D2 of switching tube Q2, the anode of anode connection battery (Ub) of diode D2, electric power storage
One end of the cathode connection output capacitance Co in pond (Ub), one end of the other end connection inductance L1 of output capacitance Co, inductance L1's
The source electrode of other end connection switch pipe Q2；
The both ends of output capacitance Co are the load supplying end Uo of three port DC/DC converters.
5. three port DC/DC converters of a kind of high-power charging according to claim 2, which is characterized in that dual input list
The equivalent circuit of output mode includes input capacitance Cin, switching tube Q1, switching tube Q2, diode D1, diode D2, inductance L1
With output capacitance Co；
The anode of one end connection voltage source Uin of input capacitance Cin, the other end connection voltage source Uin's of input capacitance Cin is negative
Pole；
The drain electrode of the positive connection switch pipe Q1 of voltage source Uin, the cathode of the source electrode connection diode D1 of switching tube Q1, diode
The cathode of the anode connection voltage source Uin of D1；
The cathode of the source electrode connection diode D1 of switching tube Q2, the cathode of the drain electrode connection diode D2 of switching tube Q2, diode
The anode of anode connection battery (Ub) of D2, the anode of the cathode connection diode D1 of battery (Ub)；
The source electrode of one end connection switch pipe Q2 of inductance L1, one end of the other end connection output capacitance Co of inductance L1, output electricity
Hold the cathode of other end connection battery (Ub) of Co, the both ends of output capacitance Co are that the load of three port DC/DC converters supplies
Electric end Uo.
6. a kind of three port DC/DC converters of high-power charging according to claim 1 or claim 2, which is characterized in that further include
Control circuit, the control circuit are opened or closed for control switch pipe Q1, switching tube Q2 and switching tube Q3's.
7. three port DC/DC converters of a kind of high-power charging according to claim 6, which is characterized in that the control
Circuit includes protection circuit (1), dsp system (2), voltage sensor (3) and current sensor (4)；
Voltage sensor (3) is for the output voltage of real-time detection voltage source Uin and the output electricity of three port DC/DC converters
Pressure；And the voltage signal that will test is sent to dsp system (2)；
Current sensor (4) is used for the output electric current of real-time detection voltage source Uin, and the current signal of acquisition is sent to DSP
System (2)；
Dsp system (2) is used to receive the voltage signal of voltage sensor (3) output and the electric current letter of current sensor (4) output
Number, the real output of three port DC/DC converters is calculated, while receiving target voltage and current signal, it is defeated to calculate target
The real output of three port DC/DC converters and target output are compared, are tied according to power contrast by power out
Fruit, generates three tunnel PWM waves, and tri- tunnel PWM wave of Bing Jiang is sent to protection circuit (1) as driving signal；
Protection circuit (1) is used to receive the switching tube driving signal of dsp system (2) transmission, to dsp system (2) and three port DC/
DC converter carries out electrical isolation；By switching tube driving signal be sent to the grid of switching tube Q1, switching tube Q2 grid and open
The grid of pipe Q3 is closed, switch tube Q1, switching tube Q2 and switching tube Q3 are driven.
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| CN113162410A (en) * | 2021-04-19 | 2021-07-23 | 南通大学 | Three-port converter and control method thereof |
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