CN109484232A - Charging power modules, charge power supply and charging unit comprising it - Google Patents
Charging power modules, charge power supply and charging unit comprising it Download PDFInfo
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- CN109484232A CN109484232A CN201811352392.2A CN201811352392A CN109484232A CN 109484232 A CN109484232 A CN 109484232A CN 201811352392 A CN201811352392 A CN 201811352392A CN 109484232 A CN109484232 A CN 109484232A
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- 239000004065 semiconductor Substances 0.000 claims description 29
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000005669 field effect Effects 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- -1 SiC metal oxide Chemical class 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 9
- 102220597188 DNA-directed RNA polymerases I, II, and III subunit RPABC2_T11A_mutation Human genes 0.000 description 6
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- 230000008569 process Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 230000000087 stabilizing effect Effects 0.000 description 4
- 102220575963 Trans-acting T-cell-specific transcription factor GATA-3_T22A_mutation Human genes 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 102220584652 Proline-, glutamic acid- and leucine-rich protein 1_D22A_mutation Human genes 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 102220606158 Coiled-coil domain-containing protein 54_D23A_mutation Human genes 0.000 description 1
- 102220481919 Probable rRNA-processing protein EBP2_D17A_mutation Human genes 0.000 description 1
- 102220584653 Proline-, glutamic acid- and leucine-rich protein 1_D21A_mutation Human genes 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
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Classifications
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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
- 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
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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
- 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
- Y02T90/12—Electric charging stations
Abstract
The present invention relates to charging techniques, in particular to charging power modules, the charge power supply comprising the charging power modules and charging unit.According to one aspect of the present invention, provided charging power modules include: AC/DC converter unit, the main circuit comprising at least one with three-phase tri-level wiener topological structure；DC/DC converter unit includes: the first crisscross parallel BUCK converter is coupled between the direct current positive bus of the main circuit and zero bus；Second crisscross parallel BUCK converter, is coupled between the direct current negative busbar of the main circuit and zero bus；And control unit, it is configured to control the duty ratio of the main circuit, switch element in the first and second crisscross parallel BUCK converters.
Description
Technical field
The present invention relates to charging techniques, in particular to charging power modules, the charge power supply comprising the charging power modules
And charging unit.
Background technique
At present on the market for the direct current quick charge stake polygamy of electric car for the charge power supply mould of lower-wattage grade
Block, this charging power modules use the combining form of three-level PFC and LLC converter or three-level PFC and phase-shifting full-bridge, this
The output voltage range of kind topological structure is limited (the ratio between ceiling voltage and minimum voltage are usually no more than 3), otherwise power supply
The design of the DC/DC grade magnetic elements of module can become abnormal difficult, while also result in certain output voltage ranges
Performance decline.In addition, if needing keeping volume and weight only added while further increasing power grade, then will
Further increase the development difficulty of the charge power supply based on this topological structure.
Summary of the invention
It is an object of the present invention to provide a kind of charging power modules, charge power supply and charging units, are capable of providing
High charge power and have compact structure.
According to one aspect of the present invention, provided charging power modules include:
AC/DC converter unit, the main circuit comprising at least one with three-phase tri-level wiener topological structure；
DC/DC converter unit includes:
First crisscross parallel BUCK converter, is coupled between the direct current positive bus of the main circuit and zero bus；
Second crisscross parallel BUCK converter, is coupled between the direct current negative busbar of the main circuit and zero bus；With
And
Control unit is configured to control the main circuit, the switch member in the first and second crisscross parallel BUCK converters
The duty ratio of part.
Optionally, in above-mentioned charging power modules, the first input end of the first crisscross parallel BUCK converter with
Direct current positive bus coupling, output end are coupled to the cathode output end of the DC/DC converter unit through first coil, and described second hands over
The first input end of wrong parallel connection BUCK converter is coupled with direct current negative busbar, and output end is coupled to the DC/DC through the second coil
The cathode output end of converter unit, the second input terminal and zero bus of the first and second crisscross parallels BUCK converter and institute
State the zero potential end coupling of DC/DC converter unit.
Optionally, in above-mentioned charging power modules, described control unit is configured to the input side of the main circuit
Voltage and current, the busbar voltage on DC bus come control the main circuit switch element duty ratio in direct current mother
Required busbar voltage is provided on line.
Optionally, in above-mentioned charging power modules, described control unit is configured to described first and second and interlocks
The output electric current of BUCK converter in parallel and the output voltage of the DC/DC converter unit are handed over to control described first and second
The duty ratio of the switch element of wrong parallel connection BUCK converter is in the cathode output end of the DC/DC converter unit and cathode output
Output voltage needed for being provided at end.
Optionally, in above-mentioned charging power modules, described control unit is additionally configured to based on the DC/DC converter unit
Output electric current come adjust the first and second crisscross parallels BUCK converter switch element duty ratio so that the DC/
The cathode output end of DC converter unit and the output current balance at cathode output end.
Optionally, in above-mentioned charging power modules, in the main circuit, the first and second crisscross parallel BUCK converters
Switch element use SiC metal oxide semiconductor field effect tube.
Optionally, in above-mentioned charging power modules, the AC/DC converter unit includes two or more with three-phase
The main circuit of three level wiener topological structures, the direct current positive bus of each main circuit, zero bus and direct current negative busbar are connected respectively
It is connected together.
According to a further aspect of the invention, provided charge power supply includes at least one charge power supply as described above
Module.
Optionally, in above-mentioned charge power supply, the quantity of the charging power modules is two or more, Mei Gesuo
The electrode input end and negative input for stating charging power modules are connected together altogether respectively.
According to a further aspect of the invention, provided charging unit includes:
Above-mentioned charge power supply；
Charging interface is coupled with the charge power supply.
Optionally, above-mentioned charging unit is the charging pile or electrical changing station electrical cabinet for electric car.
One or more embodiment according to the invention, the switch element in charging power modules use SiC semiconductor device
Part, it is possible thereby to improve power grade in the case where charge power supply volume is not significantly increased and shorten the charging time.In addition, pressing
It is capable of providing the voltage output grade of wide scope according to the present invention the charging power modules that everything goes well, thus has compatibility strong
Advantage.Furthermore provided voltage levels can reduce the design difficulty of charging gun and to select the thinner rifle of diameter
Line is possibly realized.
Detailed description of the invention
Above-mentioned and/or other aspects and advantage of the invention will be become by the description of the various aspects below in conjunction with attached drawing
It is more clear and is easier to understand, the same or similar unit, which is adopted, in attached drawing is indicated by the same numeral.Attached drawing includes:
Fig. 1 is the circuit diagram according to the charging power modules of one embodiment of the invention.
Fig. 2 is the schematic block for implementing the pressure stabilizing control process of the AC/DC converter unit in charging power modules shown in Fig. 1
Figure.
Fig. 3 A and 3B are showing for the pressure stabilizing control process of the DC/DC converter unit in charging power modules shown in implementation Fig. 1
Meaning block diagram.
Fig. 4 A and 4B are the current balance control process for implementing the DC/DC converter unit in charging power modules shown in Fig. 1
Schematic block.
Fig. 5 is the signal according to the charging power modules comprising multiple main circuits of one or more embodiments of the invention
Figure.
Fig. 6 is the signal according to the charge power supply comprising multiple charging power modules of one or more embodiments of the invention
Figure.
Fig. 7 is the schematic block diagram according to the charging unit of one or more embodiments of the invention.
Specific embodiment
Referring to which illustrates the attached drawings of illustrative examples of the present invention to more fully illustrate the present invention.But this hair
It is bright to be realized by different form, and be not construed as being only limitted to each embodiment given herein.The above-mentioned each implementation provided
Example is intended to make the disclosure of this paper comprehensively complete, and protection scope of the present invention is more fully communicated to those skilled in the art
Member.
In the present specification, the term of such as "comprising" and " comprising " etc indicates to want in addition to having in specification and right
Asking has in book directly and other than the unit clearly stated and step, technical solution of the present invention be also not excluded for having not by directly or
The situation of the other units clearly stated and step.
The term of such as " first " and " second " etc be not offered as unit the time, space, in terms of sequence
It and is only to make differentiation each unit to be used.
" coupling " should be understood as including the situation that electric flux or electric signal are directly transmitted between two units, Huo Zhejing
Cross the situation that one or more third units transmit electric flux or electric signal indirectly.
Fig. 1 is the circuit diagram according to the charging power modules of one embodiment of the invention.
As shown in Figure 1, charging power modules 10 include AC/DC converter unit 110, DC/DC converter unit 120 and control
Unit 130.
Referring to Fig. 1, AC/DC converter unit 110 includes main circuit 111, which there is three-phase tri-level Vienna to open up
Flutter structure comprising the three-phase diode rectifier bridge being made of diode D11-D16, at work each phase u- of three phase network
Input terminal of the w respectively through respective inductance element (one of them of inductance component L 11-L13) access three-phase diode rectifier bridge
One of them of A-C.In addition, each in input terminal A-C respectively accesses phase between the midpoint O of bus capacitor C11, C12
The two-way switch S11-S13 answered.Each two-way switch has the same or similar structure and element.By taking two-way switch S11 as an example,
It includes Metal Oxide Semiconductor Field Effect Transistor (metal-oxide-semiconductor) T11A, T11B, and diode D17A and D17B are connected in parallel on respectively
Between the source electrode and drain electrode of metal-oxide-semiconductor T11A, T11B.The grid of metal-oxide-semiconductor T11A, T11B are then coupled to control unit 130.It is working
When, control unit 130 is provided required straight by the duty ratio of control metal-oxide-semiconductor on direct current positive bus P and direct current negative busbar N
Galvanic electricity pressure.In particular, when two-way switch S11 conducting, u phase current iuMetal-oxide-semiconductor T11A, T11B are flowed through, bridge arm midpoint is clamped
To midpoint O；When two-way switch S11 conducting, if u phase current iu> 0, then the electric current will flow through diode D11, bridge arm midpoint
Direct current positive bus P is arrived by clamped, if u phase current iu< 0, then the electric current will flow through diode D14, and bridge arm midpoint is arrived by clamped
Direct current positive bus N.In one or more embodiments of the present invention, optionally, metal-oxide-semiconductor T11A, T11B common drive signal with
Reduce control and driving difficulty.
In one or more embodiments of the present invention, the switch element in AC/DC converter unit or metal-oxide-semiconductor are preferably adopted
With SiC metal-oxide-semiconductor.Compared with super-junction metal oxide semiconductor field effect transistor (Cool MOS), main electricity shown in Fig. 1
Conversion efficiency and power density not only can be improved using SiC metal-oxide-semiconductor in road, but also can reduce the electromagnetic radiation of converter.
In addition, the stress levels of SiC metal-oxide-semiconductor are 1200Vdc, therefore busbar voltage highest can arrive 900Vdc.When busbar voltage improves
To 900Vdc, by control DC/DC converter unit working method (such as make rear class Buck converter metal-oxide-semiconductor work exist
Under normally closed mode), the high pressure of charging power modules output 900Vdc can be made, this greatly reduces electricity when high-power charging
Stream, and the difficulty of charging gun design is also reduced while improving whole charging system efficiency.
With continued reference to Fig. 1, DC/DC converter unit 120 includes that the first crisscross parallel BUCK converter 121 and second interlocks simultaneously
Join BUCK converter 122, wherein the first crisscross parallel BUCK converter 121 be coupled in the direct current positive bus P of main circuit 111 with
Between zero bus O, and the second crisscross parallel BUCK converter 122 is coupled in the direct current negative busbar N and zero bus O of main circuit 111
Between.In addition, the zero potential end O' of DC/DC converter unit 120 is connected with zero bus O of AC/DC converter unit 110.In Fig. 1 institute
In the DC/DC converter unit 120 shown, the first and second crisscross parallel BUCK converters 121,122 structures and group having the same
At element, to avoid repeating, their internal structure is only described by taking the first crisscross parallel BUCK converter 121 as an example below.
As shown in Figure 1, the first crisscross parallel BUCK converter 121 includes that two BUCK connected in a manner of crisscross parallel become
Change circuit.In particular, one of them structure that is connected together altogether of the source electrode and drain electrode of the metal-oxide-semiconductor T21A and T21B of two translation circuits
At first input end, which is coupled to direct current positive bus, and another in their source electrode and drain electrode then passes through
Respective inductance component L 21A, L21B is coupled to inductance component L 23, and is coupled to DC/DC converter unit through inductance component L 23
120 cathode output end V+.In addition, the second input terminal of the first crisscross parallel BUCK converter 121 be connected to zero bus O and
The zero potential end O' of DC/DC converter unit 120, and another in the source electrode and drain electrode of metal-oxide-semiconductor T21A, T21B also passes through respectively
Self-corresponding reversed biased diodes D22A, D22B are coupled to second input terminal.Referring to Fig. 1, in metal-oxide-semiconductor T21A, T21B
Diode D21A, D21B of reverse bias are also respectively connected between source electrode and drain electrode.
As shown in Figure 1, being located at the inductance component L 23 and capacitor C23 and electricity of the outlet side of DC/DC converter unit 120
Sensing unit L24 and capacitor C24 forms LC filter to further decrease output voltage and current ripples.
In DC/DC converter unit shown in Fig. 1, it is single that the grid of metal-oxide-semiconductor T21A, T21B, T22A, T22B are coupled to control
Member 130.At work, control unit 130 is exported by the duty ratio of control metal-oxide-semiconductor in the anode of DC/DC converter unit 120
DC voltage needed for providing at V+ and cathode output end V- is provided.
In order to further increase power density and efficiency, optionally, the metal-oxide-semiconductor in DC/DC converter unit 120 also be can be selected
The SiC metal-oxide-semiconductor of 1200V pressure resistance is to improve stress levels and reduce electromagnetic radiation.In order to further improve efficiency, optionally,
DC/DC converter unit 120 can also use synchronous rectification, and rectifier diode D22A, D22B, D23A, D23B therein are equal
It is replaced with metal-oxide-semiconductor.
It is further described below by control principle of the attached drawing to control unit 130.
Fig. 2 is the schematic block for implementing the pressure stabilizing control process of the AC/DC converter unit in charging power modules shown in Fig. 1
Figure.It is to be appreciated that control flow shown in Fig. 2 can be used for any phase of three-phase alternating current.Illustratively,
It is described by taking u phase as an example below.
As shown in Figure 2, it is first determined busbar voltage reference value VbusrefWith busbar voltage actual value Vbus(Vbus=direct current is just
The voltage actual value V of busPThe voltage actual value V of direct current negative busbarN) between difference.Then to the difference (Vbusref-Vbus)
(such as proportion of utilization integral (PI) controller) is filtered to obtain voltage parameter Vea.Then, electricity is determined based on following formula
Flow parameter iea:
iea=kmAB/C2 (1)
Wherein, kmFor constant, A is the amplitude V of u phase alternating voltageinac, B is the average value of u phase alternating current pressure amplitude value
Vinac_avg, C is voltage parameter Vea。
It is then determined current parameters ieaWith u phase alternating current iPFCDifference, and to the difference (iea-iPFC) filtered
Wave processing (such as proportion of utilization integrates (PI) controller) is to obtain and required busbar voltage VbusrefCorresponding metal-oxide-semiconductor
The duty ratio d of T11A, T11BPFC。
For two-way switch S12 and S13, control flow shown in Fig. 2 be also it is applicable, details are not described herein again.
Fig. 3 A and 3B are showing for the pressure stabilizing control process of the DC/DC converter unit in charging power modules shown in implementation Fig. 1
Meaning block diagram, wherein Fig. 3 A is directed to the first crisscross parallel BUCK converter, and Fig. 3 B is directed to the second crisscross parallel BUCL change
Parallel operation.
As shown in Figure 3A, it is first determined the voltage actual value V at the cathode output end V+ of DC/DC converter unit 120buck1With
Voltage reference value VorefDifference.Then to the difference (Vbuck1-Voref) be filtered (such as proportion of utilization integral (PI)
Controller) to obtain current parameters iea1.It is then determined current parameters iea1With two of the first crisscross parallel BUCK converter
The output electric current i of BUCK converter unita、ibThe difference of (referring to Fig. 1), and to the difference (iea1-ia-ib) be filtered
(such as proportion of utilization integrates (PI) controller) is to obtain and required positive output voltage VorefCorresponding metal-oxide-semiconductor T21A,
The duty ratio d of T21Bbuck1。
As shown in Figure 3B, it is first determined the voltage actual value V at the cathode output end V- of DC/DC converter unit 120buck2With
Voltage reference value VorefDifference.Then to the difference (Vbuck2-Voref) be filtered (such as proportion of utilization integral (PI)
Controller) to obtain current parameters iea2.It is then determined current parameters iea2With two of the second crisscross parallel BUCK converter
The output electric current i of BUCK converter unitc、idThe difference of (referring to Fig. 1), and to the difference (iea2-ic-id) be filtered
(such as proportion of utilization integrates (PI) controller) is to obtain and required cathode output voltage VorefCorresponding metal-oxide-semiconductor T22A,
The duty ratio d of T22Bbuck2。
Fig. 4 A and 4B are the current balance control process for implementing the DC/DC converter unit in charging power modules shown in Fig. 1
Schematic block diagram, wherein Fig. 4 A is directed to the first crisscross parallel BUCK converter, and Fig. 4 B is directed to the second crisscross parallel
BUCL converter.
As shown in Figure 4 A, it is first determined the reference value i of the output electric current of the first crisscross parallel BUCK converter 121orefWith
Actual value ibuck1Difference.Then to the difference (ioref-ibuck1) be filtered (such as proportion of utilization integral (PI) control
Device) with the correction value Δ d of the duty ratio of metal-oxide-semiconductor T21A, T21B needed for obtaining current balancebuck1。
As shown in Figure 4 B, it is first determined the reference value i of the output electric current of the second crisscross parallel BUCK converter 122orefWith
Actual value ibuck2Difference.Then to the difference (ioref-ibuck2) be filtered (such as proportion of utilization integral (PI) control
Device) with the correction value Δ d of the duty ratio of metal-oxide-semiconductor T22A, T22B needed for obtaining current balancebuck2。
Charging power modules shown in FIG. 1 have good scalability.Although specifically, the AC/DC converter unit of Fig. 1
One main circuit is only shown, but it also may include more main circuits.Fig. 5 is according to one or more embodiments of the invention
The charging power modules comprising multiple main circuits schematic diagram.As shown in figure 5, charging power modules 50 are converted comprising AC/DC
Unit 510 and DC/DC converter unit 520, wherein AC/DC converter unit 510 includes multiple with mutually isostructural main circuit
510-1~510-N, and together with the direct current positive bus of each main circuit, zero bus be connected with direct current negative busbar.It is main
Structure shown in FIG. 1 can be used in circuit 510-1~510-N and DC/DC converter unit 520, and details are not described herein again.
By above-mentioned extension, the overall power of charging power modules is on the one hand improved, device is on the other hand also reduced
Thermal stress and voltage and current stress.
Further, it can also be extended as unit of charging power modules shown in Fig. 1 or 5.Fig. 6 is according to this hair
The schematic diagram of the charge power supply comprising multiple charging power modules of bright one or more embodiment.As shown in fig. 6, charge power supply
60 have mutually isostructural charging power modules 610-1~610-N comprising multiple, and the anode of each charging power modules is defeated
Together with outlet, zero potential end are connected with cathode output end.Each of charging power modules 610-1~610-N can
Using charging power modules shown in Fig. 1 or 5, details are not described herein again.
Fig. 7 is the schematic block diagram according to the charging unit of one or more embodiments of the invention.As shown in fig. 7, charging dress
It sets 70 and includes charge power supply 710 and the charging interface 720 coupled with charge power supply 710.Shown in fig. 6 fill can be used in charge power supply
Power supply, details are not described herein again.Charging interface 720 provides charge power supply 710 and outside is electrically charged equipment (such as charging vapour
Vehicle) between electric interfaces.Optionally, charging unit can be charging pile or electrical changing station electrical cabinet etc..
Embodiments and examples set forth herein is provided, to be best described by the reality according to this technology and its specific application
Example is applied, and thus enables those skilled in the art to implement and using the present invention.But those skilled in the art will
Know, provides above description and example only for the purposes of illustrating and illustrating.The description proposed is not intended to cover the present invention
Various aspects or limit the invention to disclosed precise forms.
In view of the above, the scope of the present disclosure is determined by following claims.
Claims (11)
1. a kind of charging power modules, characterized by comprising:
AC/DC converter unit, the main circuit comprising at least one with three-phase tri-level wiener topological structure；
DC/DC converter unit includes:
First crisscross parallel BUCK converter, is coupled between the direct current positive bus of the main circuit and zero bus；
Second crisscross parallel BUCK converter, is coupled between the direct current negative busbar of the main circuit and zero bus；And
Control unit is configured to control the main circuit, switch element in the first and second crisscross parallel BUCK converters
Duty ratio.
2. charging power modules as described in claim 1, wherein the first input of the first crisscross parallel BUCK converter
End is coupled with direct current positive bus, and output end is coupled to the cathode output end of the DC/DC converter unit through first coil, and described the
The first input end of two crisscross parallel BUCK converters is coupled with direct current negative busbar, and output end is coupled to described through the second coil
The cathode output end of DC/DC converter unit, the second input terminal of the first and second crisscross parallels BUCK converter and zero mother
The coupling of the zero potential end of line and the DC/DC converter unit.
3. charging power modules as claimed in claim 2, wherein described control unit is configured to the defeated of the main circuit
Enter the voltage and current of side, the busbar voltage on DC bus to control the duty ratio of the switch element of the main circuit, with
Required busbar voltage is provided on DC bus.
4. charging power modules as claimed in claim 2, wherein described control unit is configured to described first and second
The output voltage of the output electric current of crisscross parallel BUCK converter and the DC/DC converter unit controls described first and
The duty ratio of the switch element of two crisscross parallel BUCK converters, in the cathode output end of the DC/DC converter unit and negative
Pole output provides required output voltage.
5. charging power modules as claimed in claim 4, wherein described control unit is additionally configured to become based on the DC/DC
The output electric current of unit is changed adjusting the duty ratio of the switch element of the first and second crisscross parallels BUCK converter so that
The cathode output end of the DC/DC converter unit and the output current balance at cathode output end.
6. charging power modules as described in claim 1, wherein the main circuit, the first and second crisscross parallel BUCK become
Switch element in parallel operation uses SiC metal oxide semiconductor field effect tube.
7. charging power modules as described in claim 1, wherein the AC/DC converter unit includes two or more tools
There are the main circuit of three-phase tri-level wiener topological structure, the direct current positive bus of each main circuit, zero bus and direct current negative busbar quilt
It is respectively connected together.
8. a kind of charge power supply, wherein including at least one charging power modules.
9. charge power supply as claimed in claim 8, wherein the quantity of the charging power modules is two or more,
The electrode input end and negative input of each charging power modules are connected together altogether respectively.
10. a kind of charging unit, wherein include:
Charge power supply as claimed in claim 8 or 9；
Charging interface is coupled with the charge power supply.
11. charging unit as claimed in claim 10, for the charging pile or electrical changing station electrical cabinet for electric car.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811352392.2A CN109484232A (en) | 2018-11-14 | 2018-11-14 | Charging power modules, charge power supply and charging unit comprising it |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811352392.2A CN109484232A (en) | 2018-11-14 | 2018-11-14 | Charging power modules, charge power supply and charging unit comprising it |
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| CN109484232A true CN109484232A (en) | 2019-03-19 |
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| CN201811352392.2A Pending CN109484232A (en) | 2018-11-14 | 2018-11-14 | Charging power modules, charge power supply and charging unit comprising it |
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