CN113067479A - Charging module DC/DC topological circuit - Google Patents
Charging module DC/DC topological circuit Download PDFInfo
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- CN113067479A CN113067479A CN202110320655.7A CN202110320655A CN113067479A CN 113067479 A CN113067479 A CN 113067479A CN 202110320655 A CN202110320655 A CN 202110320655A CN 113067479 A CN113067479 A CN 113067479A
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- circuit
- charging module
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- transformer
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/285—Single converters with a plurality of output stages connected in parallel
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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
Abstract
The invention provides a charging module DC/DC topological circuit, wherein a main circuit is of a three-phase H-bridge structure. Each bridge arm is an independent LLC converter. The three converters are integrated together to form a high power LLC converter. The transformer is an integrated EE type transformer. A group of coils are wound on each magnetic pole, the primary sides of three transformers corresponding to the three magnetic poles are connected with bridge arms of a three-phase H bridge, and the secondary sides are connected with respective rectifying circuits; the three-way converter is a whole, and isolated DC/DC conversion is completed by using a special control mode. The invention provides a novel topological structure and a novel control idea for a low-cost high-power density converter.
Description
Technical Field
The invention relates to the field of automobile charging, in particular to a charging module DC/DC topological circuit.
Background
At present, the charging module DC/DC topology circuit on the market is as follows:
as shown in fig. 1, two half-bridge LLC converters output 10KW +10KW, and the secondary sides of the converters are rectified and then connected in parallel or in series. A half-bridge LLC circuit, an isolation transformer and a rectifying circuit are adopted to form a direct current charging circuit, and the direct current charging circuit is connected in series or in parallel at a direct current output end of the rectifying circuit for output.
As shown in FIG. 2, the output power of two bridge type phase shift converters is 10KW +10KW, and the secondary sides of the converters are connected in parallel or in series after rectification.
Fig. 3 shows another three-level charging module DC/DC topology circuit.
The three circuits all adopt a mode of a double-bridge-arm H-bridge type switching circuit, an isolation transformer and a rectification output circuit, and are output at a rectification output end in a parallel or series mode to charge the automobile.
At present, in a charging module DC/DC topological circuit, an isolation transformer is driven by a bridge topology formed by single tubes, so that the output power is difficult to be improved, and the requirement of the market on a high-power charging module cannot be met.
Disclosure of Invention
The invention provides a novel charging module DC/DC topological circuit aiming at the defects that the output power is difficult to improve and the requirement of the market on a high-power charging module cannot be met because the charging module DC/DC topological circuit is driven by a topological circuit formed by a single tube at present.
The technical scheme adopted by the invention for realizing the technical requirements is as follows: a charging module DC/DC topological circuit comprises three-phase H bridge arm converters, wherein each phase H bridge arm converter is connected with a primary side of a transformer, and a secondary side of the transformer is provided with a respective rectifying circuit; the three transformers are integrated into a whole, and the primary winding and the secondary winding of each transformer are respectively wound on an E-shaped magnetic column.
Further, in the above charging module DC/DC topology circuit: the cross sections of the three magnetic columns on the E-shaped magnetic column (2) are the same as those of the soft magnetic ferrite.
Further, in the above charging module DC/DC topology circuit: in the H-bridge circuit of each phase, the PWM signals for controlling the two switching tubes are mutually in opposite phase.
Further, in the above charging module DC/DC topology circuit: and two ends of each switching tube are connected with a capacitor in parallel.
Further, in the above charging module DC/DC topology circuit: and when any phase of H bridge is connected with the primary side of the transformer, a resonant inductor is also connected in series.
Further, in the above charging module DC/DC topology circuit: and the other end of the primary side of the transformer is also connected with a resonant capacitor in series.
Further, in the above charging module DC/DC topology circuit: the rectifying circuit output by the transformer is a full-bridge rectifying circuit; each path rectifies output V. :
V。＝2.828/(n*π)*Vin
n is the transformer transformation ratio and Vin is the input voltage.
Further, in the above charging module DC/DC topology circuit: the three-way full-bridge rectifier circuit outputs the parallel low-voltage heavy current output and the series high-voltage constant power output.
Further, in the above charging module DC/DC topology circuit: the method is characterized in that: the three-phase H-bridge converter can be understood as a three-way half-bridge LLC converter and is controlled by 6-way three-pair modulation signals which are complementary pairwise; each set of complementary modulation signals has the same frequency and phase difference of 120 degrees.
In the invention, the transformers of the converter are integrated into a whole, thereby reducing the volume, lowering the cost and improving the power of the charging module.
The invention will be explained in more detail below with reference to the drawings and examples.
Drawings
Fig. 1 is a diagram (one) of a current commonly used DC/DC topology circuit topology.
Fig. 2 is a diagram (two) of a current commonly used DC/DC topology circuit topology.
Fig. 3 is a (third) diagram of a current commonly used DC/DC topology circuit topology structure.
FIG. 4 is a circuit diagram of an H-bridge circuit and an isolation transformer in the DC/DC topology circuit of the charging module of the present invention.
FIG. 5 is a schematic diagram of a full-wave rectifier circuit in the DC/DC topology circuit of the charging module according to the present invention.
Fig. 6 is an output control circuit in the DC/DC topology circuit of the charging module of the present invention.
Detailed Description
Embodiment 1, this embodiment is a charging module DC/DC topology circuit, as shown in fig. 4, including at least one isolation transformer, where a primary side of each isolation transformer is an H-bridge structure circuit, and a secondary side of each isolation transformer is a respective rectifying circuit; the structure comprises three isolation transformers and a three-phase H-bridge circuit, wherein one end of the primary side of each isolation transformer is connected with the upper arm and the lower arm in the one-phase H-bridge circuit, the other end of each isolation transformer is connected with the + -end of a power supply through a capacitor, all the isolation transformers are integrated into a whole, the primary side winding and the secondary side winding are wound on a magnetic column, all the magnetic columns extend out from a magnet, and the magnetic core structure is shown in figure 4.
In order to reduce the transformer cost of the converter, the power density is increased. The transformers are integrated into a whole. Magnetic material: the shape of the soft magnetic ferrite can be PQ type, EE type or EEW type, and is determined according to the actual assembly space. The winding method comprises the following steps: the primary and secondary windings of each path of transformation are wound on a magnetic pole. Three groups of winding turns and winding methods are required to be consistent.
In the H-bridge circuit of each phase, the modulation signals for controlling the two switching tubes are mutually in opposite phase. As shown in fig. 4, the circuit is a primary side of a main circuit of the DC/DC isolation converter and has a three-phase H-bridge structure.
The +400V power supply positive pole is connected with the 400V DC power supply through the switching tubes MS1 and MS2, the switch is controlled by a control circuit, the control circuit generates a switching signal for control, and a resonant inductor LR1 is connected in series when the H bridge is connected with the primary side of the transformer. The other end of the primary side of the transformer is also connected with a resonant capacitor CR1 in series. The specific circuit is shown in fig. 4. The magnetic cores of the three transformers form an E-shaped magnetic core, and the primary coil and the secondary coil of the isolation transformer are respectively wound on the three magnetic columns with the same sectional area.
The theoretical basis is as follows:
(2/π)*Vin*sin(wt)+(2/π)*Vin*sin(wt+120°)+(2/π)*Vin*sin(wt-120°)＝0；
LR1 LR2 LR3 resonant inductor;
a CR1 CR2 CR3 resonant capacitor;
TRF1 TRF2 TRF3 converter transformer (in practice, the AB C three-phase winding of one transformer);
MS1 MS2 forms a bridge arm which are opposite in phase, and a capacitor connected in parallel on each tube is not shown;
MS3 MS4 forms a bridge arm which are opposite in phase, and a capacitor connected in parallel on each tube is not shown;
MS5 MS6 forms a bridge arm which are opposite in phase, and a capacitor connected in parallel on each tube is not shown;
as shown in fig. 5, the full-wave rectifier circuit of the present embodiment is a three-way transformer output rectifier circuit or a full-bridge rectifier circuit.
Each path rectifies output V. 2.828/(n pi) Vin
n is the transformer transformation ratio and Vin is the input voltage.
In this embodiment, the output control circuit further includes an output control circuit for realizing low-voltage heavy current output by the output of the three full-bridge rectifier circuits in parallel and high-voltage constant power output by the three full-bridge rectifier circuits in series. The output control circuit is shown in fig. 6:
the total output of the DC/DC module is connected in parallel and in series by three rectification outputs to realize low-voltage heavy current output and high-voltage constant power output.
RL1, RL2, RL3 and RL5 relays are closed, RL4 and RL6 are opened, and the module outputs low-voltage large current.
RL1, RL2, RL3 and RL5 relays are opened, RL4 and RL6 are closed, and the module outputs high-voltage constant power.
The topological circuit is a three-phase H-bridge converter and can be decomposed into three paths of half-bridge LLC converters, and in order to realize transformer integration, the three paths of converters are controlled by 6 paths of three pairs of modulation signals which are complementary to each other. Each set of complementary modulation signals has the same frequency and phase difference of 120 degrees.
Claims (9)
1. A charging module DC/DC topological circuit comprises three-phase H bridge arm converters, wherein each phase H bridge arm converter is connected with a primary side of a transformer, and a secondary side of the transformer is provided with a respective rectifying circuit; the method is characterized in that: the three transformers are integrated into a whole, and the primary winding and the secondary winding of each transformer are respectively wound on an E-shaped magnetic column (2).
2. The charging module DC/DC topology circuit of claim 1, wherein: the cross sections of the three magnetic columns on the E-shaped magnetic column (2) are the same as those of the soft magnetic ferrite.
3. The charging module DC/DC topology circuit of claim 2, wherein: in the H bridge arm circuit of each phase, the modulation control signals for controlling the two switching tubes are mutually in opposite phase.
4. The charging module DC/DC topology circuit of claim 3, wherein: and two ends of each switching tube are connected with a capacitor in parallel.
5. The charging module DC/DC topology circuit of claim 2, wherein: and when any phase of H bridge arm is connected with the primary side of the transformer, a resonant inductor is also connected in series.
6. The charging module DC/DC topology circuit of claim 5, wherein: and the other end of the primary side of the transformer is also connected with a resonant capacitor in series.
7. The charging module DC/DC topology circuit of claim 2, wherein: the rectifying circuit output by the three isolation transformers (common magnetic cores, namely integrated magnetic cores) is a full-bridge rectifying circuit; each path rectifies output V. :
V。＝2.828/(n*π)*Vin
n is the transformer transformation ratio and Vin is the input voltage.
8. The charging module DC/DC topology circuit of claim 7, wherein: the three-way full-bridge rectifier circuit outputs the parallel low-voltage heavy current output and the series high-voltage constant power output.
9. The charging module DC/DC topology circuit of claim 8, wherein: the method is characterized in that: the three-phase H-bridge converter consists of three paths of half-bridge LLC converters and is controlled by 6 paths of three pairs of modulation signals which are complementary pairwise; each set of complementary modulation signals has the same frequency and phase difference of 120 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110320655.7A CN113067479B (en) | 2021-03-25 | 2021-03-25 | DC/DC topological circuit of charging module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110320655.7A CN113067479B (en) | 2021-03-25 | 2021-03-25 | DC/DC topological circuit of charging module |
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| CN113067479A true CN113067479A (en) | 2021-07-02 |
| CN113067479B CN113067479B (en) | 2023-06-27 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685980A (en) * | 2008-09-27 | 2010-03-31 | 力博特公司 | Full-bridge zero-voltage boost switching resonant converter based on LLC used for UPS |
| US20100301982A1 (en) * | 2009-06-01 | 2010-12-02 | Osram Gesellschaft Mit Beschraenkter Haftung | High frequency transformer and multi-output constant current source with high frequency transformer |
| CN107294392A (en) * | 2017-08-11 | 2017-10-24 | 何晓东 | A kind of bidirectional DC/DC converter |
| CN107786090A (en) * | 2016-08-30 | 2018-03-09 | 雅达电子国际有限公司 | With the multi-phase power supply inverter for Transformer Winding and the integrated core of inductor winding |
| CN108429466A (en) * | 2018-04-12 | 2018-08-21 | 浙江大学 | A kind of three road output DC-DC converter of isolation hybrid modulation based on three-phase LLC resonance circuits and phase whole-bridging circuit |
| CN109510453A (en) * | 2018-12-11 | 2019-03-22 | 南京工程学院 | A kind of EV onboard charger based on SiC power device |
| CN209358441U (en) * | 2019-03-13 | 2019-09-06 | 南昌航空大学 | A kind of two-way changing circuit and converter comprising dual resonant cavity |
| US20190355506A1 (en) * | 2018-05-21 | 2019-11-21 | Virginia Tech Intellectual Properties, Inc. | Interleaved converters with integrated magnetics |
| CN111193398A (en) * | 2020-02-21 | 2020-05-22 | 固德威电源科技(广德)有限公司 | Isolated bidirectional DCDC converter and current bidirectional control method |
-
2021
- 2021-03-25 CN CN202110320655.7A patent/CN113067479B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685980A (en) * | 2008-09-27 | 2010-03-31 | 力博特公司 | Full-bridge zero-voltage boost switching resonant converter based on LLC used for UPS |
| US20100301982A1 (en) * | 2009-06-01 | 2010-12-02 | Osram Gesellschaft Mit Beschraenkter Haftung | High frequency transformer and multi-output constant current source with high frequency transformer |
| CN107786090A (en) * | 2016-08-30 | 2018-03-09 | 雅达电子国际有限公司 | With the multi-phase power supply inverter for Transformer Winding and the integrated core of inductor winding |
| CN107294392A (en) * | 2017-08-11 | 2017-10-24 | 何晓东 | A kind of bidirectional DC/DC converter |
| CN108429466A (en) * | 2018-04-12 | 2018-08-21 | 浙江大学 | A kind of three road output DC-DC converter of isolation hybrid modulation based on three-phase LLC resonance circuits and phase whole-bridging circuit |
| US20190355506A1 (en) * | 2018-05-21 | 2019-11-21 | Virginia Tech Intellectual Properties, Inc. | Interleaved converters with integrated magnetics |
| CN109510453A (en) * | 2018-12-11 | 2019-03-22 | 南京工程学院 | A kind of EV onboard charger based on SiC power device |
| CN209358441U (en) * | 2019-03-13 | 2019-09-06 | 南昌航空大学 | A kind of two-way changing circuit and converter comprising dual resonant cavity |
| CN111193398A (en) * | 2020-02-21 | 2020-05-22 | 固德威电源科技(广德)有限公司 | Isolated bidirectional DCDC converter and current bidirectional control method |
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| CN113067479B (en) | 2023-06-27 |
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