CN112332671A - LLC topological structure of DC/DC converter - Google Patents
LLC topological structure of DC/DC converter Download PDFInfo
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- CN112332671A CN112332671A CN202010994615.6A CN202010994615A CN112332671A CN 112332671 A CN112332671 A CN 112332671A CN 202010994615 A CN202010994615 A CN 202010994615A CN 112332671 A CN112332671 A CN 112332671A
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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
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/066—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode particular circuits having a special characteristic
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/068—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode mounted on a 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention relates to a topological structure of a charging pile/charging device converter. A DC/DC converter LLC topological structure comprises a switch network, a resonance network and a rectifier network, wherein the switch network is formed by connecting two groups of bridge switches in series, each group of bridge switches is formed by connecting three standard groups of H-bridge circuits in parallel to form a switch sub-network and then connecting the switch sub-network in series to form the switch network, the output of each group of bridge switches is connected with the primary coils of a group of transformers forming the resonance network, the secondary side and each primary coil of each group of transformers are correspondingly provided with 2 secondary coils, the three secondary coils of each group of transformers adopt a star connection method, and the outputs of the three secondary coils are respectively connected into the rectifier sub-network. The LLC topological structure is suitable for high-power, wide-voltage and constant-power output, and is characterized by continuous output constant power, no switching action of output and improvement on the safety and reliability of products.
Description
Technical Field
The invention relates to a topological structure of a charging pile/charging device converter.
Background
According to the market demand of the charging pile industry, the direct current charging pile is evolving towards the direction of high power (30kW and above), wide voltage and constant power output (200V-1000V constant power output). Many manufacturers on the market use circuits with LLC topologies, but the traditional LLC scheme cannot realize wide-voltage constant-power output. Some improved LLC schemes use a 2-channel LLC structure, and realize a series mode (300-500 low-voltage interval constant power) or a parallel mode (500-750 high-voltage interval constant power) of the 2-channel LLC output through a relay, thereby realizing wide-voltage constant power output. This solution has obvious drawbacks, firstly the relay is a mechanical element with limited service life; secondly, at the moment of switching the relay, the output power is intermittent, and the customer experience is poor. Based on the above background and market demands, how to provide an LLC topology structure suitable for high power, wide voltage, constant power output, continuous output constant power, and high reliability becomes a research hotspot of those skilled in the art.
Chinese patent 20161097663.8 discloses a full-bridge LC resonance exchanger with a double-transformer series-parallel structure, which comprises a main circuit and a control module, wherein the main circuit comprises an input direct current source, a full-bridge switch network, an LC vibration network, a secondary side rectification filter circuit and a battery pack load which are connected in sequence, the control module comprises an output voltage sampling circuit, the full-bridge LC vibration converter adopts a double-converter series-parallel structure, primary windings of two transformers are connected in series, currents flowing through the primary windings are the same, automatic balance of secondary side currents can be achieved, the number of turns of the primary windings is reduced, current stress of the secondary side windings and rectifier diodes can be reduced due to the fact that the secondary windings are connected in parallel, the double-transformer series-parallel structure is beneficial to reducing the size of a magnetic core, hot spots are dispersed, heat management is facilitated, and the full-bridge LC vibration converter is suitable for occasions of medium-power and high-power electric vehicle chargers. The full-bridge LC resonance exchanger is a single LLC topology structure, and the upper limit of output power is lower than 10 kW. And the product in the present charging pile market is basically at the edge of eliminating 15kW, 20kW is the mainstream, and more than 30kW is a new competitive point. In addition, the output rectification of the patent uses a full-bridge rectification parallel output mode, and the output within a wide constant power range, such as 300-1000V constant power output, is difficult to realize, because LLC is frequency conversion control, the frequency changes within a large range, and the selection of all power devices is difficult.
Chinese patent 201910748743.X proposes a charging module, a dc charging pile, and a method for controlling the dc charging pile, where the charging module includes a rectifying module, a C-vibration module, and a wave module: wherein, it is stable to utilize rectifier module control C to shake the input direct current voltage of module, and resonance module adopts fixed switching frequency control mode, consequently C shakes the output voltage of module and fixes or the range of variation is less, make resonance inductance and transformer among the LC spectrum vibration module obtain optimizing, thereby the design degree of difficulty of resonance inductance and transformer among the C circuit that shakes has been reduced, and adopt the output voltage scope of chopper module adjustment LLC resonance module, the final output voltage scope that makes the module of charging is wider, because LLC resonance module adopts the control of an open loop control mode of fixed switching frequency, so can set up this fixed switching frequency near C naoko shake the naoko frequency of module, thereby improve C shake the conversion efficiency of module. The patent specifies that its LLC operates in fixed frequency mode, in other words an open loop topology, with a constant output voltage. And finally, the function of adjusting the output voltage is realized by the post-stage chopping module. This chopping block, along with the last L, C, is effectively a Buck circuit. The patent uses an LLC + chopping module, and the output adjustable function is realized by 2-stage topology, so that the efficiency is not high. In addition, the Buck circuit is a step-down topology, so the output voltage of the front-stage LLC is higher than the highest voltage required by the load, the output is not adjustable because the front-stage LLC is controlled by a fixed-frequency open loop, and when the voltage required by the load is the lowest voltage, the difference value of the input voltage and the output voltage of the Buck circuit is extremely large, and the efficiency of the Buck circuit is further reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an LLC topological structure suitable for high-power, wide-voltage and constant-power output. Its advantages are continuous output constant power (no switching action), and high reliability.
The technical scheme adopted by the invention is as follows:
a DC/DC converter LLC topological structure comprises a switch network, a resonance network and a rectifier network, wherein the switch network is formed by connecting two groups of bridge switches in series, each group of bridge switches is formed by connecting three standard groups of H-bridge circuits in parallel to form a switch sub-network and then connecting the switch sub-network in series to form the switch network, the output of each group of bridge switches is connected with the primary coils of a group of transformers forming the resonance network, the secondary side and each primary coil of each group of transformers are correspondingly provided with 2 secondary coils, the three secondary coils of each group of transformers adopt a star connection method, and the outputs of the three secondary coils are respectively connected into the rectifier sub-network.
The rectifier network consists of 2 parts, which are respectively marked as Rtf1 and Rtf2, the Rtf1 and Rtf2 are connected in parallel or in series, and Rtf1 and Rtf2 are respectively formed by connecting 2 rectifier sub-networks in series or in parallel; the rectifier sub-network is composed of a three-phase rectifier bridge.
In the LLC topological structure of the DC/DC converter, a resonant network consists of 2 parts, which are respectively marked as Tank1 and Tank 2; the Tank1 consists of three sub-networks of a Tank1-1, a Tank1-2 and a Tank 1-3; the Tank2 consists of three sub-networks of Tank2-1, Tank2-2 and Tank 2-3; the primary sides of the 3 sub-resonant networks are staggered by 120 ° under the influence of the front-end H-bridge.
The DC/DC converter LLC topological structure forms a standard H-bridge circuit of a switching sub-network and consists of 4 switching tubes (Q1\ Q2\ Q3\ Q4), wherein two diagonally arranged switching tubes (Q1\ Q4) are driven to be in phase, and the driving phase of two diagonally arranged switching tubes (Q1\ Q4) is 180 degrees different from that of two diagonally arranged switching tubes (Q2\ Q3); the bridge switches that form the switching sub-network are in either a full bridge or half bridge configuration.
The DC/DC converter LLC topological structure is characterized in that two groups of bridge switches forming a switch network are connected in series and are respectively marked as an S1 network and an S2 network; the S1 network is formed by connecting three groups of H bridge circuits S1-1, S1-2 and S1-3 in parallel; the S2 network is formed by connecting three groups of H bridge circuits S2-1, S2-2 and S2-3 in parallel; the working states of the interior of each sub-network are the same, and in the switching network S1, the switching tubes at the same positions of the sub-networks S1-1, S1-2 and S1-3 are driven by 120 degrees; in the switching network S2, the switching tubes in the same positions of sub-networks S2-1, S2-2 and S2-3 are driven by 120 degrees. In the switching sub-network, S1-1 is out of phase with S2-1 by 30 ° or an integer multiple of 30 °.
The invention has the beneficial effects that:
1. the LLC topological structure of the DC/DC converter adopts a plurality of power conversion units to realize the effective work of the circuit through a specific connection mode and a specific control time sequence. The high-power, wide-voltage and constant-power output of the LLC topological structure can be realized, the output constant power is continuous (no switching action is output), and the reliability is high. The specific scheme uses an LLC topological structure consisting of 6H bridges and an interleaving technology, so that the power output of each LLC unit is reduced, and the problem of service life of the preceding-stage electrolytic capacitor and the subsequent-stage electrolytic capacitor can be solved.
2. According to the LLC topological structure of the DC/DC converter, switch networks S1 and S2 are connected in series, and rectifying networks Rtf1 and Rtf2 are connected in parallel. Through the connection and the matching, the voltage-sharing and current-sharing of the upper circuit and the lower circuit are realized. The rectifier network adopts a parallel connection method, and can effectively solve the problem of large current output. The output rectification uses a star-type three-phase full-bridge rectification mode, and the rectification mode is essentially different from the common full-bridge rectification, namely the output rectification voltage is doubled. The wide constant power range output is realized.
3. According to the LLC topological structure of the DC/DC converter, the phase difference of the driving of the switching sub-networks S1-1, S1-2 and S1-3 is 120 degrees, and the phase difference of the driving of the sub-networks S2-1, S2-2 and S2-3 is 120 degrees. And S1-1 is out of phase with S2-1 by 30 or an integer multiple of 30. At the moment, the output ripple is minimum, and the usability is high.
4. According to the LLC topological structure of the DC/DC converter, each secondary side of each transformer is provided with 2 independent windings, and the multiple windings are connected in a double star mode and then are connected in series through Rtf1-1 and Rtf1-2 to be output. The problem of wide output voltage can be effectively solved.
5. The LLC topological structure of the DC/DC converter is a closed-loop circuit with directly adjustable output voltage and does not need a chopping module. Wide application range and convenient use.
Drawings
FIG. 1 is a schematic diagram of an LLC topology implementation of a DC/DC converter according to the invention;
FIG. 2 is a waveform diagram of driving of various parts of the switching network;
3-1, 3-2 are schematic diagrams of connection relations of the resonant network;
FIG. 4 is a schematic diagram of a connection mode of a rectifier network (Rtf1, Rtf2 are connected in parallel, Rtf1-1/Rtf1-2 are connected in series, and Rtf2-1/Rtf2-2 are connected in series);
FIG. 5: the second schematic diagram of the embodiment of the LLC topology structure of the DC/DC converter of the invention;
FIG. 6: the invention discloses a second schematic diagram of a DC/DC converter LLC topological structure specific implementation mode.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
Example 1
Referring to fig. 1, 2, 3-1, 3-2, and 4, the LLC topology of the DC/DC converter of the present invention includes a switch network, a resonant network, and a rectifier network, where the switch network is formed by connecting two sets of bridge switches in series, each set of bridge switches is formed by connecting three standard H-bridge circuits in parallel to form a switch sub-network, and then connected in series to form the switch network, where the output of each set of bridge switches is connected to the primary coils of a set of transformers forming the resonant network, the secondary side and each primary coil of each set of transformers are correspondingly provided with 2 secondary coils (2 independent windings), and the three secondary coils (windings) of each set of transformers are connected to the rectifier sub-network by star connection, and the outputs of the three secondary coils (windings) are respectively connected. The rectifier network consists of 2 parts, which are respectively marked as Rtf1 and Rtf2, the Rtf1 and Rtf2 are connected in parallel, and Rtf1 and Rtf2 are respectively formed by connecting 2 rectifier sub-networks in series; the rectifier sub-network is composed of a three-phase rectifier bridge. In the schematic shown in fig. 4, Rtf1 is in parallel relationship with Rtf 2. Rtf1 is composed of Rtf1-1, Rtf1-2, etc. 2 sub-networks connected in series. Rtf2 are similar to Rtf1 and will not be described in detail.
As shown in fig. 3-1 and 3-2, in the DC/DC converter LLC topology of this embodiment, the resonant network is composed of 2 sets of transformers, which are respectively denoted as Tank1 and Tank 2; the Tank1 consists of three sub-networks of a Tank1-1, a Tank1-2 and a Tank 1-3; the Tank2 consists of three sub-networks of Tank2-1, Tank2-2 and Tank 2-3; the primary sides of the 3 sub-resonant networks are staggered by 120 ° under the influence of the front-end H-bridge. The secondary side of each transformer is provided with 2 independent windings, the windings T1S-1, T2S-1 and T3S-1 adopt a star connection method, and the output of the windings is connected into a rectifier sub-network Rtf 1-1. Similarly, the windings T1S-2, T2S-2 and T3S-2 adopt a star connection method, and the output of the star connection method is connected to the rectifier sub-network Rtf 1-2.
As shown in fig. 1, the standard H-bridge circuit constituting the switching sub-network is composed of 4 switching tubes (Q1\ Q2\ Q3\ Q4), wherein two diagonally arranged switching tubes (Q1\ Q4) are driven in phase, and wherein two diagonally arranged switching tubes (Q1\ Q4) are driven 180 ° out of phase with two diagonally arranged switching tubes (Q2\ Q3); the bridge switches that form the switching sub-network are in either a full bridge or half bridge configuration.
As shown in fig. 1, two sets of bridge switches, which are connected in series to form a switch network, are respectively denoted as an S1 network and an S2 network; the S1 network is formed by connecting three groups of H bridge circuits S1-1, S1-2 and S1-3 in parallel; the S2 network is formed by connecting three groups of H bridge circuits S2-1, S2-2 and S2-3 in parallel; the working states of the interior of each sub-network are the same, and in the switching network S1, the switching tubes at the same positions of the sub-networks S1-1, S1-2 and S1-3 are driven by 120 degrees; in the switching network S2, the switching tubes in the same positions of sub-networks S2-1, S2-2 and S2-3 are driven by 120 degrees. The driving waveforms of the parts are shown in fig. 2: in the switching networks S1 and S2, the switching tubes in the same position are 30 ° out of phase. The S1-1Q 1\ Q4 drive is not limited to 30 ° out of phase with the S2-1Q 1\ Q4 drive. In theory the phases may differ by any angle.
The DC/DC converter LLC topological structure of the invention has the advantages of continuous output constant power, no switching action of output, good heat dissipation and improved safety and reliability of products.
Example 2
Referring to fig. 5, the DC/DC converter LLC topology of the present embodiment is different from that of embodiment 1 in that: sub-networks Rtf1 and Rtf2 are connected in series, which is suitable for higher voltage demand.
Example 3
Referring to fig. 6, the DC/DC converter LLC topology of the present embodiment is different from that of embodiment 1 in that: the sub-networks Rtf1-1 and Rtf1-2, and Rtf2-1 and Rtf2-2 are connected in parallel respectively, so that the high-current high-power-demand transformer is suitable for occasions with higher current demand.
The above examples are only for illustrating the present invention and should not be construed as limiting the scope of the claims of the present invention. The invention discloses a DC/DC converter LLC topological structure, a series-parallel connection mode of a switch network and a series-parallel connection mode of a rectifier network, which adopt the following combination: two sets of bridge switches of the switch network are connected in series, and the rectifier network adopts two sets of rectifier bridges connected in series. The series-parallel connection mode of the switch network and the series-parallel connection mode of the rectifier network adopt the following combination: the two groups of bridge switches forming the switch network are connected in parallel, and the two groups of rectifier bridges forming the rectifier network are connected in series or in parallel.
According to the LLC topological structure of the DC/DC converter, the primary side of each transformer is not limited to 1 winding, and a plurality of windings can be adopted; the secondary side of the transformer is not limited to 2 windings and can be provided with a plurality of windings; also, the plurality of windings is not limited to being within 1 entity, and the windings may be distributed among a plurality of entities; correspondingly, the number of the rectifier sub-networks is not limited to 2, and the number of the rectifier sub-networks can be more than one according to the number of the secondary windings of the transformer. The skilled in the art can make other modifications to the embodiments of the present invention or replace them with the conventional ones without creative work, and the scope of the claims of the present invention should be covered without departing from the spirit and scope of the technical solution of the present invention.
Claims (9)
1. A DC/DC converter LLC topological structure comprises a switch network, a resonance network and a rectification network, and is characterized in that: the switch network is formed by connecting two groups of bridge switches in series, each group of bridge switches is formed by connecting three standard groups of H-bridge circuits in parallel to form a switch sub-network and then connected in series to form the switch network, wherein the output of each group of bridge switches is connected with the primary coils of a group of transformers forming the resonance network, the secondary side and each primary coil of each group of transformers are correspondingly provided with 2 secondary coils, the three secondary coils of each group of transformers adopt a star connection method, and the outputs of the three secondary coils are respectively connected to a rectifier sub-network.
2. DC/DC converter LLC topology according to claim 1, characterized in that: the rectifier network consists of 2 parts, which are respectively marked as Rtf1 and Rtf2, the Rtf1 and Rtf2 are connected in parallel or in series, and Rtf1 and Rtf2 are respectively formed by connecting 2 rectifier sub-networks in series or in parallel; the rectifier sub-network is composed of a three-phase rectifier bridge.
3. DC/DC converter LLC topology according to claim 1, characterized in that: the resonant network consists of 2 parts, which are respectively marked as Tank1 and Tank 2; the Tank1 consists of three sub-networks of a Tank1-1, a Tank1-2 and a Tank 1-3; the Tank2 consists of three sub-networks of Tank2-1, Tank2-2 and Tank 2-3; the primary sides of the 3 sub-resonant networks are staggered by 120 ° under the influence of the front-end H-bridge.
4. DC/DC converter LLC topology according to claim 2, characterized in that: the resonant network consists of 2 parts, which are respectively marked as Tank1 and Tank 2; the Tank1 consists of three sub-networks of a Tank1-1, a Tank1-2 and a Tank 1-3; the Tank2 consists of three sub-networks of Tank2-1, Tank2-2 and Tank 2-3; the primary sides of the 3 sub-resonant networks are staggered by 120 ° under the influence of the front-end H-bridge.
5. DC/DC converter LLC topology according to claim 1, 2, 3 or 4, characterized by: the standard H-bridge circuit forming the switching sub-network consists of 4 switching tubes (Q1\ Q2\ Q3\ Q4), wherein two diagonally arranged switching tubes (Q1\ Q4) are driven to be in phase, and the driving phase of the two diagonally arranged switching tubes (Q1\ Q4) is 180 degrees different from that of the two diagonally arranged switching tubes (Q2\ Q3); the bridge switches that form the switching sub-network are in either a full bridge or half bridge configuration.
6. DC/DC converter LLC topology according to claim 5, characterized in that: two groups of bridge switches which are connected in series to form a switch network are respectively marked as an S1 network and an S2 network; the S1 network is formed by connecting three groups of H bridge circuits S1-1, S1-2 and S1-3 in parallel; the S2 network is formed by connecting three groups of H bridge circuits S2-1, S2-2 and S2-3 in parallel; the working states of the interior of each sub-network are the same, and in the switching network S1, the switching tubes at the same positions of the sub-networks S1-1, S1-2 and S1-3 are driven by 120 degrees; in the switching network S2, the switching tubes in the same positions of sub-networks S2-1, S2-2 and S2-3 are driven by 120 degrees.
7. DC/DC converter LLC topology according to claim 6, characterized in that: in the switching sub-network, S1-1 is out of phase with S2-1 by 30 ° or an integer multiple of 30 °.
8. DC/DC converter LLC topology according to claim 1, 2, 3, 6 or 7, characterized by: the series-parallel connection mode of the switch network and the series-parallel connection mode of the rectifier network adopt the following combination: two sets of bridge switches of the switch network are connected in series, and the rectifier network adopts two sets of rectifier bridges connected in series.
9. DC/DC converter LLC topology according to claim 1, 2, 3, 6 or 7, characterized by: the series-parallel connection mode of the switch network and the series-parallel connection mode of the rectifier network adopt the following combination: the two groups of bridge switches forming the switch network are connected in parallel, and the two groups of rectifier bridges forming the rectifier network are connected in series or in parallel.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113541493A (en) * | 2021-07-15 | 2021-10-22 | 深圳市优优绿能电气有限公司 | Ultra-high-power wide-range constant-power converter |
| CN114244123A (en) * | 2021-11-24 | 2022-03-25 | 北京动力源科技股份有限公司 | Full-bridge LLC constant-power wide-range converter topology and circuit |
| CN114244122A (en) * | 2021-11-24 | 2022-03-25 | 北京动力源科技股份有限公司 | Half-bridge LLC constant-power wide-range converter topology and circuit |
| CN115720047A (en) * | 2022-12-06 | 2023-02-28 | 深圳市优优绿能股份有限公司 | Power expansion device for three-phase LLC circuit |
| CN115912928A (en) * | 2022-11-07 | 2023-04-04 | 深圳市优优绿能股份有限公司 | Device suitable for super-high power |
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2020
- 2020-09-21 CN CN202010994615.6A patent/CN112332671A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113541493A (en) * | 2021-07-15 | 2021-10-22 | 深圳市优优绿能电气有限公司 | Ultra-high-power wide-range constant-power converter |
| CN114244123A (en) * | 2021-11-24 | 2022-03-25 | 北京动力源科技股份有限公司 | Full-bridge LLC constant-power wide-range converter topology and circuit |
| CN114244122A (en) * | 2021-11-24 | 2022-03-25 | 北京动力源科技股份有限公司 | Half-bridge LLC constant-power wide-range converter topology and circuit |
| CN115912928A (en) * | 2022-11-07 | 2023-04-04 | 深圳市优优绿能股份有限公司 | Device suitable for super-high power |
| CN115720047A (en) * | 2022-12-06 | 2023-02-28 | 深圳市优优绿能股份有限公司 | Power expansion device for three-phase LLC circuit |
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