WO2020191578A1 - Dc-dc converter - Google Patents

Dc-dc converter Download PDF

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Publication number
WO2020191578A1
WO2020191578A1 PCT/CN2019/079518 CN2019079518W WO2020191578A1 WO 2020191578 A1 WO2020191578 A1 WO 2020191578A1 CN 2019079518 W CN2019079518 W CN 2019079518W WO 2020191578 A1 WO2020191578 A1 WO 2020191578A1
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Prior art keywords
switch
full
converter
bridge rectifier
terminal
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PCT/CN2019/079518
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French (fr)
Chinese (zh)
Inventor
赵研峰
石磊
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西门子股份公司
西门子（中国）有限公司
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Application filed by 西门子股份公司, 西门子（中国）有限公司 filed Critical 西门子股份公司
Priority to PCT/CN2019/079518 priority Critical patent/WO2020191578A1/en
Priority to CN201980092968.2A priority patent/CN113474984A/en
Publication of WO2020191578A1 publication Critical patent/WO2020191578A1/en

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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

Definitions

  • This application relates to the field of circuit design. Specifically, this application relates to a DC-DC converter.
  • the resonance circuit is widely used in, for example, the DC-DC conversion of electric vehicle charging.
  • the converter switching frequency modulation range needs to be wide, which will cause some problems. For example, a large voltage gain makes closed-loop control very difficult, and even a small change in the switching frequency will cause a large voltage adjustment.
  • the wide range of switching frequency makes it difficult to fully utilize the high switching frequency performance of the device. For example, SiC or GaN devices have low switching losses and can be used in high switching frequency scenarios.
  • the transformer and the inductor can have a smaller size in the case of a high switching frequency. This makes the system has a lower cost. For a wide frequency range, the transformer and inductor will need to have a relatively large size, which will increase the cost of the converter.
  • the phase-shifted full-bridge converter is characterized by a fixed switching frequency, and its output voltage is modulated by duty cycle.
  • the PWM control strategy can increase the switching frequency of the element, which will reduce the capacity of the transformer or inductor. Therefore, the cost of the converter can be reduced.
  • the phase-shifted full-bridge converter also has some disadvantages. For example, the operating efficiency of the phase-shifted full-bridge converter is lower than that of the resonant circuit DC/DC resonant converter (LLC DC/DC resonant converter), and it is difficult for the phase-shifted full-bridge converter to achieve soft switching under light loads.
  • the embodiments of the present application provide a DC-DC converter to at least solve the problem of the wide input and wide output voltage range of the DC-DC converter in the prior art.
  • a DC-DC converter including: a first resonance unit, the positive terminal of the first resonance unit is connected to the positive terminal of the power grid input terminal; a second resonance unit, the second resonance The negative terminal of the unit is connected to the negative terminal of the grid input terminal; the first full bridge rectifier, the positive terminal of the first full bridge rectifier is connected to the positive terminal of the grid output terminal; the second full bridge rectifier, the negative terminal of the second full bridge rectifier is connected to the grid The negative terminal of the output terminal is connected; a first transformer, arranged between the first resonant unit and the first full-bridge rectifier; a second transformer, arranged between the second resonant unit and the second full-bridge rectifier; a first switch , The negative terminal of the first resonant unit is connected to the positive terminal of the second resonant unit through the first switch; and a second switch, the negative terminal of the first full bridge rectifier is connected to the second full bridge through the second switch Connect the positive terminal
  • two resonant units can be connected in series, and two full-bridge rectifiers can be connected in series, thereby having a high input voltage range and a high output voltage range relative to the conventional resonant circuit converter.
  • the DC-DC converter further includes: a third switch, the positive terminal of the first resonance unit is connected to the positive terminal of the second resonance unit through the third switch; and a fourth switch, the The negative terminal of the first resonance unit is connected to the negative terminal of the second resonance unit through the fourth switch; the fifth switch, the negative terminal of the first full-bridge rectifier is connected to the negative terminal of the second full-bridge rectifier through the fifth switch Terminal connection; and a sixth switch, the positive terminal of the first full-bridge rectifier is connected to the positive terminal of the second full-bridge rectifier through the sixth switch.
  • connection relationship between the resonant units and the connection relationship between the full-bridge rectifiers can be controlled by switching, so that the DC-DC converter can work in different modes and provide different input voltage ranges and output voltage ranges.
  • the DC-DC converter is configured to operate in a first mode.
  • the first switch and the second switch are closed, and the third switch, the The fourth switch, the fifth switch and the sixth switch are turned off.
  • the DC-DC converter can be operated in a high input voltage range and a high output voltage range mode by controlling the switch.
  • the DC-DC converter is configured to operate in a second mode, in which the first switch, the fifth switch, and the sixth switch are closed, and the The second switch, the third switch and the fourth switch are turned off.
  • the DC-DC converter can be operated in a high input voltage range and a low output voltage range by controlling the switch.
  • the DC-DC converter is configured to operate in a third mode, in which: the second switch, the third switch, and the fourth switch are closed, and the The first switch, the fifth switch, and the sixth switch are turned off.
  • the DC-DC converter is configured to operate in a fourth mode, in which: the third switch, the fourth switch, the fifth switch, and the sixth switch The switch is closed, and the first switch and the second switch are open.
  • the DC-DC converter can be operated in the normal input voltage range and the normal output voltage range by controlling the switch.
  • a technical solution is provided for using a switch control circuit to control the connection relationship of the resonant unit in the DC-DC converter and the connection relationship of the full-bridge rectifier, so as to at least solve the difficulty in realizing the wide input of the DC-DC converter And the technical problems of wide output voltage range, improve the performance of DC-DC converter, can dynamically change the parameters and topology in the circuit, and realize the technology that makes DC-DC converter adapt to different input voltage and output voltage range effect.
  • Fig. 1 is a topology diagram of a DC-DC converter according to an embodiment of the present application
  • Fig. 2 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application
  • Fig. 3 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application.
  • Fig. 4 is a topological diagram of a DC-DC converter according to an exemplary embodiment of the present application.
  • Fig. 5 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application.
  • Fig. 6 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application.
  • T1 the first transformer
  • T2 the second transformer
  • a process, method, system, product or device that includes a series of steps or modules or units is not necessarily limited to clearly listed Instead, those steps or modules or units listed may include other steps or modules or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.
  • the topological structure of the resonant circuit converter includes two parts, namely the resonant circuit part on the primary side of the transformer and the rectifier part on the slave side of the transformer.
  • the rectifier part can adopt a full bridge rectifier, a half bridge rectifier or a full wave rectifier.
  • the performance of the full-bridge rectifier and the full-wave rectifier using the typical topology is better than that of the half-bridge rectifier, but the cost will increase.
  • a DC-DC converter is provided.
  • Fig. 1 is a topology diagram of a DC-DC converter according to an embodiment of the present application.
  • the DC-DC converter is arranged in the DC circuit.
  • the left side of Figure 1 shows the input terminal of the DC circuit, including the resonant circuit part
  • the right side of Figure 1 shows the output terminal of the DC circuit, including all Bridge rectifier part.
  • a resonant unit is provided at the input end of the DC circuit as a resonant circuit, and the output end of the circuit is provided with a full bridge rectifier.
  • the current at the input end of the circuit passes through the resonant circuit and passes through the transformer between the resonant unit and the full bridge rectifier.
  • the output terminal of the circuit receives the output current obtained by the mutual inductance of the resonance unit and the full-bridge rectifier, thereby performing DC-DC conversion.
  • the DC-DC converter includes a resonant circuit part and a full-bridge rectifier part.
  • the resonance circuit part includes a first resonance unit LLC1 and a second resonance unit LLC2.
  • the positive terminal of the first resonance unit LLC1 is connected to the positive terminal IN+ of the power grid input terminal
  • the negative terminal of the second resonance unit LLC2 is connected to the negative terminal IN- of the grid input terminal.
  • the full bridge rectifier part includes a first full bridge rectifier FUB1 and a second full bridge rectifier FUB2.
  • the positive terminal of the first full-bridge rectifier FUB1 is connected to the positive terminal OUT+ of the power grid output terminal
  • the negative terminal of the second full-bridge rectifier FUB2 is connected to the negative terminal OUT- of the grid output terminal.
  • the negative terminal of the first resonance unit LLC1 is connected to the positive terminal of the second resonance unit LLC2 through the first switch K1, and the negative terminal of the first full bridge rectifier FUB1 is connected to the positive terminal of the second full bridge rectifier FUB2 through the second switch K2.
  • a first transformer T1 is provided between the first resonance unit LLC1 and the first full bridge rectifier FUB1.
  • a second transformer T2 is provided between the second resonance unit LLC2 and the second full bridge rectifier FUB2.
  • the first resonance unit LLC1 and the second resonance unit LLC2 have the same topological structure, and the first full-bridge rectifier FUB1 and the second full-bridge rectifier FUB2 have the same topological structure.
  • the current at the input end of the circuit is input to the first resonant unit LLC1 from the positive IN+ of the input end of the power grid, is input to the second resonant unit LLC2 through the circuit turned on by the first switch K1, and flows to the negative IN- of the input end of the power grid, the first transformer T1 and the The second transformer T2 provides mutual inductance current to the output terminal of the circuit.
  • the direction of the current is from the positive pole OUT+ of the grid output terminal through the first full bridge rectifier FUB1, the circuit turned on by the second switch K2, the second full bridge rectifier FUB2 and the negative pole of the grid output terminal OUT-.
  • the DC-DC converter with the topology shown in Figure 1 can connect two resonant units in series and connect two full-bridge rectifiers in series.
  • the input of the circuit has a large input voltage range, and the output of the circuit has Large output voltage range, which has a high input voltage range and a high output voltage range compared to the traditional resonant circuit converter.
  • Fig. 2 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application.
  • a circuit controlled by a plurality of switches is adopted to realize different connection modes of the resonant circuit part and the full-bridge rectifier part.
  • the DC-DC converter further includes: a third switch K3, a fourth switch K4, a fifth switch K5, and a sixth switch K6.
  • the positive terminal of the first resonance unit LLC1 is connected to the positive terminal of the second resonance unit LLC2 through the third switch K3.
  • the negative terminal of the first resonance unit LLC1 is connected to the negative terminal of the second resonance unit LLC2 through the fourth switch K4.
  • the negative terminal of the first full bridge rectifier FUB1 is connected to the negative terminal of the second full bridge rectifier FUB2 through the fifth switch K5.
  • the positive terminal of the first full bridge rectifier FUB1 is connected to the positive terminal of the second full bridge rectifier FUB2 through the sixth switch K6.
  • Fig. 3 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application.
  • the DC-DC converter is configured to operate in a first mode of a high input voltage range and a high output voltage range, wherein: the first switch K1 and the second switch K2 is closed, and the third switch K3, the fourth switch K4, the fifth switch K5, and the sixth switch K6 are opened.
  • the connection relationship between the resonant circuit part and the full-bridge rectifier part is the same as that of the DC-DC converter shown in FIG.
  • the DC-DC converter provides a high input voltage range and a high output voltage range.
  • Fig. 4 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application.
  • the DC-DC converter is configured to operate in a second mode of a high input voltage range and a low output voltage range, wherein: the first switch K1, the fifth switch K5 and the sixth switch K6 are closed, and the second switch K2, the third switch K3, and the fourth switch K4 are open.
  • the gain in the circuit is low.
  • the switching frequency needs to be very high, which will increase the switching frequency range of the element, making it difficult to obtain the advantage of low power loss of some switching elements.
  • Fig. 5 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application.
  • the DC-DC converter is configured to operate in a third mode of a low input voltage range and a high output voltage range, wherein: the second switch K2, the third switch K3 and the fourth switch K4 are closed, and the first switch K1, the fifth switch K5, and the sixth switch K6 are opened.
  • the third mode the gain in the circuit is high.
  • the control strategy is difficult to set, because at high gain, a small change in the switching frequency will cause a large change in the voltage gain.
  • Fig. 6 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application.
  • the DC-DC converter is configured to operate in a fourth mode of a normal input voltage range and a normal output voltage range, wherein: the third switch K3, the fourth switch K4, the fifth switch K5, and the sixth switch K6 are closed, and the first switch K1 and the second switch K2 are open.
  • the fourth mode two resonant units are connected in parallel, and two full-bridge rectifiers are connected in parallel, the input voltage and output voltage have small fluctuations, and the system has a simple control strategy. In this way, the DC-DC converter can provide the normal input voltage range and the normal output voltage range by controlling the switch.
  • the disclosed technical content can be implemented in other ways.
  • the above-described device embodiments are merely illustrative, for example, the division of the units or modules is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or modules or components. Can be combined or integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, modules or units, and may be in electrical or other forms.
  • the units or modules described as separate parts may or may not be physically separate, and the parts displayed as units or modules may or may not be physical units or modules, that is, they may be located in one place, or they may be distributed to Multiple network units or modules. Some or all of the units or modules may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • each functional unit or module in each embodiment of the present application can be integrated into one processing unit or module, or each unit or module can exist alone physically, or two or more units or modules can be integrated into one. Unit or module.
  • the above-mentioned integrated units or modules can be implemented in the form of hardware or software functional units or modules.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program code .

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Abstract

The present application relates to a DC-DC converter, comprising: a first resonance unit, the positive terminal of which being connected with the positive pole of the power grid input end; a second resonance unit, the negative terminal of which being connected with the negative pole of the power grid input end; a first full-bridge rectifier, the positive terminal of which being connected with the positive pole of the power grid output end; a second full-bridge rectifier, the negative terminal being connected with the negative pole of the power grid output end; a first transformer, disposed between the first resonance unit and the first full-bridge rectifier; a second transformer, disposed between the second resonance unit and the second full-bridge rectifier; a first switch, through which the negative terminal of the first resonance unit being connected to the positive pole of the second resonance unit; and a second switch, through which the negative terminal of the first full-bridge rectifier being connected to the positive terminal of the second full-bridge rectifier. The technical solution of the present application provides a wide input and output range for the DC-DC converter.

Description

直流-直流变换器DC-DC converter 技术领域Technical field
本申请涉及电路设计领域。具体地，本申请涉及直流-直流变换器。This application relates to the field of circuit design. Specifically, this application relates to a DC-DC converter.
背景技术Background technique
谐振电路(LLC)广泛应用于例如电动车充电的直流-直流变换中。为了满足较宽的输入和输出电压范围的需求，变换器开关频率调制范围需要宽，这会造成一些问题。例如，大的电压增益使闭环控制变得非常困难，即使开关频率的小幅改变也将造成较大的电压调整。此外，开关频率的宽范围使得难以完全利用设备的高开关频率性能。例如，SiC或GaN设备具有低开关损耗的特点，可用于高开关频率的场景中。同时，变压器和电感在高开关频率的情况下可以具有较小的尺寸。这使得***具有较低成本。对于宽的频率范围，变压器和电感将需要具有相对较大的尺寸，这会增加变换器的成本。The resonance circuit (LLC) is widely used in, for example, the DC-DC conversion of electric vehicle charging. In order to meet the needs of a wider input and output voltage range, the converter switching frequency modulation range needs to be wide, which will cause some problems. For example, a large voltage gain makes closed-loop control very difficult, and even a small change in the switching frequency will cause a large voltage adjustment. In addition, the wide range of switching frequency makes it difficult to fully utilize the high switching frequency performance of the device. For example, SiC or GaN devices have low switching losses and can be used in high switching frequency scenarios. At the same time, the transformer and the inductor can have a smaller size in the case of a high switching frequency. This makes the system has a lower cost. For a wide frequency range, the transformer and inductor will need to have a relatively large size, which will increase the cost of the converter.
移相全桥变换器具有固定的开关频率的特征，其输出电压是通过占空比调制的。PWM控制策略能够增加元件开关频率，这会降低变压器或电感的容量。因此，变换器成本可以降低。然而，移相全桥变换器也有一些缺点。例如，移相全桥变换器的工作效率低于谐振电路直流-直流变换器(LLC DC/DC resonant converter)，而且移相全桥变换器难以在轻负载下实现软开关。The phase-shifted full-bridge converter is characterized by a fixed switching frequency, and its output voltage is modulated by duty cycle. The PWM control strategy can increase the switching frequency of the element, which will reduce the capacity of the transformer or inductor. Therefore, the cost of the converter can be reduced. However, the phase-shifted full-bridge converter also has some disadvantages. For example, the operating efficiency of the phase-shifted full-bridge converter is lower than that of the resonant circuit DC/DC resonant converter (LLC DC/DC resonant converter), and it is difficult for the phase-shifted full-bridge converter to achieve soft switching under light loads.
发明内容Summary of the invention
本申请实施例提供了直流-直流变换器，以至少解决现有技术中难以实现直流-直流变换器的宽输入和宽输出电压范围的问题。The embodiments of the present application provide a DC-DC converter to at least solve the problem of the wide input and wide output voltage range of the DC-DC converter in the prior art.
根据本申请实施例的一个方面，提供了一种直流-直流变换器，包括：第一谐振单元，该第一谐振单元的正极端子与电网输入端的正极连接；第二谐振单元，该第二谐振单元的负极端子与电网输入端的负极连接；第一全桥整流器，该第一全桥整流器的正极端子与电网输出端的正极连接；第二全桥整流器，该第二全桥整流器的负极端子与电网输出端的负极连接；第一变压器，设置在该第一谐振单元与该第一全桥整流器之间；第二变压器，设置在该第二谐振单元与该第二全桥整流器之间；第一开关，该第一谐振单元的负极端子通过该第一开关与该第二谐振单元的正极端子连接；以及第 二开关，该第一全桥整流器的负极端子通过该第二开关与该第二全桥整流器的正极端子连接。According to one aspect of the embodiments of the present application, there is provided a DC-DC converter, including: a first resonance unit, the positive terminal of the first resonance unit is connected to the positive terminal of the power grid input terminal; a second resonance unit, the second resonance The negative terminal of the unit is connected to the negative terminal of the grid input terminal; the first full bridge rectifier, the positive terminal of the first full bridge rectifier is connected to the positive terminal of the grid output terminal; the second full bridge rectifier, the negative terminal of the second full bridge rectifier is connected to the grid The negative terminal of the output terminal is connected; a first transformer, arranged between the first resonant unit and the first full-bridge rectifier; a second transformer, arranged between the second resonant unit and the second full-bridge rectifier; a first switch , The negative terminal of the first resonant unit is connected to the positive terminal of the second resonant unit through the first switch; and a second switch, the negative terminal of the first full bridge rectifier is connected to the second full bridge through the second switch Connect the positive terminal of the rectifier.
以这样的方式，能够使两个谐振单元串联，并且使两个全桥整流器串联，从而相对于传统的谐振电路变换器具有高输入电压范围和高输出电压范围。In this way, two resonant units can be connected in series, and two full-bridge rectifiers can be connected in series, thereby having a high input voltage range and a high output voltage range relative to the conventional resonant circuit converter.
根据本申请的示例性实施例，直流-直流变换器还包括：第三开关，该第一谐振单元的正极端子通过该第三开关与该第二谐振单元的正极端子连接；第四开关，该第一谐振单元的负极端子通过该第四开关与该第二谐振单元的负极端子连接；第五开关，该第一全桥整流器的负极端子通过该第五开关与该第二全桥整流器的负极端子连接；以及第六开关，该第一全桥整流器的正极端子通过该第六开关与该第二全桥整流器的正极端子连接。According to an exemplary embodiment of the present application, the DC-DC converter further includes: a third switch, the positive terminal of the first resonance unit is connected to the positive terminal of the second resonance unit through the third switch; and a fourth switch, the The negative terminal of the first resonance unit is connected to the negative terminal of the second resonance unit through the fourth switch; the fifth switch, the negative terminal of the first full-bridge rectifier is connected to the negative terminal of the second full-bridge rectifier through the fifth switch Terminal connection; and a sixth switch, the positive terminal of the first full-bridge rectifier is connected to the positive terminal of the second full-bridge rectifier through the sixth switch.
以这样的方式，能够通过开关控制谐振单元之间的连接关系和全桥整流器之间的连接关系，使直流-直流变换器工作在不同的模式下，提供不同的输入电压范围和输出电压范围。In this way, the connection relationship between the resonant units and the connection relationship between the full-bridge rectifiers can be controlled by switching, so that the DC-DC converter can work in different modes and provide different input voltage ranges and output voltage ranges.
根据本申请的示例性实施例，该直流-直流变换器被配置为在第一模式下运行，在该第一模式下：该第一开关和该第二开关闭合，并且该第三开关、该第四开关、该第五开关和该第六开关断开。According to an exemplary embodiment of the present application, the DC-DC converter is configured to operate in a first mode. In the first mode: the first switch and the second switch are closed, and the third switch, the The fourth switch, the fifth switch and the sixth switch are turned off.
以这样的方式，可以通过控制开关使直流-直流变换器在高输入电压范围和高输出电压范围的模式下运行。In this way, the DC-DC converter can be operated in a high input voltage range and a high output voltage range mode by controlling the switch.
根据本申请的示例性实施例，该直流-直流变换器被配置为在第二模式下运行，在该第二模式下：该第一开关、该第五开关和该第六开关闭合，并且该第二开关、该第三开关和该第四开关断开。According to an exemplary embodiment of the present application, the DC-DC converter is configured to operate in a second mode, in which the first switch, the fifth switch, and the sixth switch are closed, and the The second switch, the third switch and the fourth switch are turned off.
以这样的方式，可以通过控制开关使直流-直流变换器在高输入电压范围和低输出电压范围的模式下运行。In this way, the DC-DC converter can be operated in a high input voltage range and a low output voltage range by controlling the switch.
根据本申请的示例性实施例，该直流-直流变换器被配置为在第三模式下运行，在该第三模式下：该第二开关、该第三开关和该第四开关闭合，并且该第一开关、该第五开关、和该第六开关断开。According to an exemplary embodiment of the present application, the DC-DC converter is configured to operate in a third mode, in which: the second switch, the third switch, and the fourth switch are closed, and the The first switch, the fifth switch, and the sixth switch are turned off.
以这样的方式，可以通过控制开关使直流-直流变换器在低输入电压范围和高输出电压范围的模式下运行。In this way, the DC-DC converter can be operated in a low input voltage range and a high output voltage range mode by controlling the switch.
根据本申请的示例性实施例，该直流-直流变换器被配置为在第四模式下运行，在该第四模式下：该第三开关、该第四开关、该第五开关和该第六开关闭合，并且该第 一开关和该第二开关断开。According to an exemplary embodiment of the present application, the DC-DC converter is configured to operate in a fourth mode, in which: the third switch, the fourth switch, the fifth switch, and the sixth switch The switch is closed, and the first switch and the second switch are open.
以这样的方式，可以通过控制开关使直流-直流变换器在正常输入电压范围和正常输出电压范围的模式下运行。In this way, the DC-DC converter can be operated in the normal input voltage range and the normal output voltage range by controlling the switch.
在本申请实施例中，提供了使用开关控制电路控制直流-直流变换器中的谐振单元的连接关系和全桥整流器的连接关系的技术方案，以至少解决难以实现直流-直流变换器的宽输入和宽输出电压范围的技术问题，提升了直流-直流变换器的性能，可以动态改变电路中的参数和拓扑结构，实现了使直流-直流变换器适应于不同的输入电压和输出电压范围的技术效果。In the embodiments of the present application, a technical solution is provided for using a switch control circuit to control the connection relationship of the resonant unit in the DC-DC converter and the connection relationship of the full-bridge rectifier, so as to at least solve the difficulty in realizing the wide input of the DC-DC converter And the technical problems of wide output voltage range, improve the performance of DC-DC converter, can dynamically change the parameters and topology in the circuit, and realize the technology that makes DC-DC converter adapt to different input voltage and output voltage range effect.
附图说明Description of the drawings
此处所说明的附图用来提供对本申请的进一步理解，构成本申请的一部分，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The exemplary embodiments and descriptions of the application are used to explain the application and do not constitute an improper limitation of the application. In the attached picture:
图1是根据本申请实施例的直流-直流变换器的拓扑图；Fig. 1 is a topology diagram of a DC-DC converter according to an embodiment of the present application;
图2是根据本申请示例性实施例的直流-直流变换器的拓扑图；Fig. 2 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application;
图3是根据本申请示例性实施例的直流-直流变换器的拓扑图；Fig. 3 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application;
图4是根据本申请示例性实施例的直流-直流变换器的拓扑图；Fig. 4 is a topological diagram of a DC-DC converter according to an exemplary embodiment of the present application;
图5是根据本申请示例性实施例的直流-直流变换器的拓扑图；Fig. 5 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application;
图6是根据本申请示例性实施例的直流-直流变换器的拓扑图。Fig. 6 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application.
附图标号说明：Description with icon number:
LLC1，第一谐振单元；LLC1, the first resonant unit;
LLC2，第二谐振单元；LLC2, the second resonance unit;
FUB1，第一全桥整流器；FUB1, the first full bridge rectifier;
FUB2，第二全桥整流器；FUB2, the second full bridge rectifier;
K1，第一开关；K1, the first switch;
K2，第二开关；K2, the second switch;
K3，第三开关；K3, the third switch;
K4，第四开关；K4, the fourth switch;
K5，第五开关；K5, the fifth switch;
K6，第六开关；K6, the sixth switch;
T1，第一变压器；T1, the first transformer;
T2，第二变压器；T2, the second transformer;
IN+，电网输入端的正极；IN+, the positive pole of the grid input terminal;
IN-，电网输入端的负极；IN-, the negative pole of the grid input terminal;
OUT+，电网输出端的正极；OUT+, the positive pole of the grid output terminal;
OUT-，电网输出端的负极。OUT-, the negative pole of the grid output.
具体实施方式detailed description
为了使本技术领域的人员更好地理解本申请方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分的实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本申请保护的范围。In order to enable those skilled in the art to better understand the solution of the application, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the protection scope of this application.
需要说明的是，本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或模块或单元的过程、方法、***、产品或设备不必限于清楚地列出的那些步骤或模块或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或模块或单元。It should be noted that the terms "first" and "second" in the description and claims of the application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or modules or units is not necessarily limited to clearly listed Instead, those steps or modules or units listed may include other steps or modules or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.
谐振电路变换器的拓扑结构中包括两部分，分别为变压器的主侧的谐振电路部分和变压器的从侧的整流器部分。整流器部分可以采用全桥整流器、半桥整流器或全波整流器。采用典型的拓扑结构的全桥整流器和全波整流器的性能比半桥整流器好，但是成本会增加。The topological structure of the resonant circuit converter includes two parts, namely the resonant circuit part on the primary side of the transformer and the rectifier part on the slave side of the transformer. The rectifier part can adopt a full bridge rectifier, a half bridge rectifier or a full wave rectifier. The performance of the full-bridge rectifier and the full-wave rectifier using the typical topology is better than that of the half-bridge rectifier, but the cost will increase.
根据本申请实施例，提供了一种直流-直流变换器。图1是根据本申请实施例的直 流-直流变换器的拓扑图。如图1所示，直流-直流变换器设置在直流电路中，图1的左侧示出直流电路的输入端，包括谐振电路部分，图1的右侧示出直流电路的输出端，包括全桥整流器部分。在直流电路的输入端设置有谐振单元用作谐振电路，电路的输出端设置有全桥整流器(full bridge rectifier)，电路的输入端的电流通过谐振电路，经过谐振单元与全桥整流器之间的变压器，电路的输出端接收通过谐振单元与全桥整流器的互感得到的输出电流，从而进行直流-直流变换。According to an embodiment of the present application, a DC-DC converter is provided. Fig. 1 is a topology diagram of a DC-DC converter according to an embodiment of the present application. As shown in Figure 1, the DC-DC converter is arranged in the DC circuit. The left side of Figure 1 shows the input terminal of the DC circuit, including the resonant circuit part, and the right side of Figure 1 shows the output terminal of the DC circuit, including all Bridge rectifier part. A resonant unit is provided at the input end of the DC circuit as a resonant circuit, and the output end of the circuit is provided with a full bridge rectifier. The current at the input end of the circuit passes through the resonant circuit and passes through the transformer between the resonant unit and the full bridge rectifier. , The output terminal of the circuit receives the output current obtained by the mutual inductance of the resonance unit and the full-bridge rectifier, thereby performing DC-DC conversion.
如图1所示，直流-直流变换器包括谐振电路部分和全桥整流器部分。谐振电路部分包括第一谐振单元LLC1和第二谐振单元LLC2。第一谐振单元LLC1的正极端子与电网输入端的正极IN+连接，第二谐振单元LLC2的负极端子与电网输入端的负极IN-连接。全桥整流器部分包括第一全桥整流器FUB1和第二全桥整流器FUB2。第一全桥整流器FUB1的正极端子与电网输出端的正极OUT+连接，第二全桥整流器FUB2的负极端子与电网输出端的负极OUT-连接。第一谐振单元LLC1的负极端子通过第一开关K1与第二谐振单元LLC2的正极端子连接，第一全桥整流器FUB1的负极端子通过第二开关K2与第二全桥整流器FUB2的正极端子连接。As shown in Figure 1, the DC-DC converter includes a resonant circuit part and a full-bridge rectifier part. The resonance circuit part includes a first resonance unit LLC1 and a second resonance unit LLC2. The positive terminal of the first resonance unit LLC1 is connected to the positive terminal IN+ of the power grid input terminal, and the negative terminal of the second resonance unit LLC2 is connected to the negative terminal IN- of the grid input terminal. The full bridge rectifier part includes a first full bridge rectifier FUB1 and a second full bridge rectifier FUB2. The positive terminal of the first full-bridge rectifier FUB1 is connected to the positive terminal OUT+ of the power grid output terminal, and the negative terminal of the second full-bridge rectifier FUB2 is connected to the negative terminal OUT- of the grid output terminal. The negative terminal of the first resonance unit LLC1 is connected to the positive terminal of the second resonance unit LLC2 through the first switch K1, and the negative terminal of the first full bridge rectifier FUB1 is connected to the positive terminal of the second full bridge rectifier FUB2 through the second switch K2.
第一谐振单元LLC1与第一全桥整流器FUB1之间设置有第一变压器T1。第二谐振单元LLC2与第二全桥整流器FUB2之间设置有第二变压器T2。第一谐振单元LLC1与第二谐振单元LLC2具有相同的拓扑结构，第一全桥整流器FUB1与第二全桥整流器FUB2具有相同的拓扑结构。A first transformer T1 is provided between the first resonance unit LLC1 and the first full bridge rectifier FUB1. A second transformer T2 is provided between the second resonance unit LLC2 and the second full bridge rectifier FUB2. The first resonance unit LLC1 and the second resonance unit LLC2 have the same topological structure, and the first full-bridge rectifier FUB1 and the second full-bridge rectifier FUB2 have the same topological structure.
电路的输入端的电流从电网输入端的正极IN+输入第一谐振单元LLC1，经由第一开关K1导通的电路输入到第二谐振单元LLC2，并流向电网输入端的负极IN-，第一变压器T1和第二变压器T2向电路的输出端提供互感电流，电流的方向为从电网输出端的正极OUT+经过第一全桥整流器FUB1、第二开关K2导通的电路、第二全桥整流器FUB2以及电网输出端的负极OUT-。The current at the input end of the circuit is input to the first resonant unit LLC1 from the positive IN+ of the input end of the power grid, is input to the second resonant unit LLC2 through the circuit turned on by the first switch K1, and flows to the negative IN- of the input end of the power grid, the first transformer T1 and the The second transformer T2 provides mutual inductance current to the output terminal of the circuit. The direction of the current is from the positive pole OUT+ of the grid output terminal through the first full bridge rectifier FUB1, the circuit turned on by the second switch K2, the second full bridge rectifier FUB2 and the negative pole of the grid output terminal OUT-.
采用图1所示的拓扑结构的直流-直流变换器，能够使两个谐振单元串联连接，并且使两个全桥整流器串联连接，电路的输入端具有大的输入电压范围，电路的输出端具有大的输出电压范围，从而相对于传统的谐振电路变换器具有高输入电压范围和高输出电压范围。The DC-DC converter with the topology shown in Figure 1 can connect two resonant units in series and connect two full-bridge rectifiers in series. The input of the circuit has a large input voltage range, and the output of the circuit has Large output voltage range, which has a high input voltage range and a high output voltage range compared to the traditional resonant circuit converter.
图2是根据本申请示例性实施例的直流-直流变换器的拓扑图。根据本申请的示例性实施例，采用通过多个开关控制的电路以实现谐振电路部分和全桥整流器部分的不同的连接方式。如图2所示，直流-直流变换器还包括：第三开关K3、第四开关K4，第五开关K5、以及第六开关K6。第一谐振单元LLC1的正极端子通过第三开关K3与第二谐振单元LLC2的正极端子连接。第一谐振单元LLC1的负极端子通过第四开关K4 与第二谐振单元LLC2的负极端子连接。第一全桥整流器FUB1的负极端子通过第五开关K5与第二全桥整流器FUB2的负极端子连接。第一全桥整流器FUB1的正极端子通过第六开关K6与第二全桥整流器FUB2的正极端子连接。采用如图2所示的拓扑结构，能够通过打开、闭合不同的开关控制谐振单元之间的连接关系和全桥整流器之间的连接关系，使直流-直流变换器在不同的谐振单元之间的连接关系和全桥整流器之间的连接关系的情况下具备四个工作模式。根据本申请示例性实施例，直流-直流变换器在不同的模式下工作，提供不同的输入电压范围和输出电压范围。Fig. 2 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application. According to the exemplary embodiment of the present application, a circuit controlled by a plurality of switches is adopted to realize different connection modes of the resonant circuit part and the full-bridge rectifier part. As shown in FIG. 2, the DC-DC converter further includes: a third switch K3, a fourth switch K4, a fifth switch K5, and a sixth switch K6. The positive terminal of the first resonance unit LLC1 is connected to the positive terminal of the second resonance unit LLC2 through the third switch K3. The negative terminal of the first resonance unit LLC1 is connected to the negative terminal of the second resonance unit LLC2 through the fourth switch K4. The negative terminal of the first full bridge rectifier FUB1 is connected to the negative terminal of the second full bridge rectifier FUB2 through the fifth switch K5. The positive terminal of the first full bridge rectifier FUB1 is connected to the positive terminal of the second full bridge rectifier FUB2 through the sixth switch K6. Using the topology shown in Figure 2, the connection relationship between the resonant units and the connection relationship between the full-bridge rectifiers can be controlled by opening and closing different switches, so that the DC-DC converter can be used between different resonant units. In the case of the connection relationship and the connection relationship between the full-bridge rectifier, there are four operating modes. According to an exemplary embodiment of the present application, the DC-DC converter works in different modes, providing different input voltage ranges and output voltage ranges.
图3是根据本申请示例性实施例的直流-直流变换器的拓扑图。如图3所示，根据本申请的示例性实施例，直流-直流变换器被配置为在高输入电压范围和高输出电压范围的第一模式下运行，其中：第一开关K1和第二开关K2闭合，并且第三开关K3、第四开关K4、第五开关K5和第六开关K6断开。在图3示出的直流-直流变换器的第一模式中，谐振电路部分和全桥整流器部分与图1所示的直流-直流变换器的连接关系相同，两个谐振单元串联连接，并且两个全桥整流器串联连接，***的增益是正常值，但是电路的输入端具有大的输入电压范围，电路的输出端具有大的输出电压范围，单个谐振单元和全桥整流器的增益基本不变，直流-直流变换器提供高输入电压范围和高输出电压范围。Fig. 3 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application. As shown in FIG. 3, according to an exemplary embodiment of the present application, the DC-DC converter is configured to operate in a first mode of a high input voltage range and a high output voltage range, wherein: the first switch K1 and the second switch K2 is closed, and the third switch K3, the fourth switch K4, the fifth switch K5, and the sixth switch K6 are opened. In the first mode of the DC-DC converter shown in FIG. 3, the connection relationship between the resonant circuit part and the full-bridge rectifier part is the same as that of the DC-DC converter shown in FIG. 1, two resonant units are connected in series, and two Two full-bridge rectifiers are connected in series, the gain of the system is normal, but the input end of the circuit has a large input voltage range, and the output end of the circuit has a large output voltage range. The gain of a single resonant unit and full-bridge rectifier is basically unchanged. The DC-DC converter provides a high input voltage range and a high output voltage range.
图4是根据本申请示例性实施例的直流-直流变换器的拓扑图。如图4所示，根据本申请的示例性实施例，直流-直流变换器被配置为在高输入电压范围和低输出电压范围的第二模式下运行，其中：第一开关K1、第五开关K5和第六开关K6闭合，并且第二开关K2、第三开关K3和第四开关K4断开。在第二模式中，电路中的增益低。对于传统的谐振电路拓扑结构，为了实现低增益，开关频率需要非常高，这会增加元件的开关频率范围，从而难以获得一些开关元件的低电力损耗的优势。而在如图4所示的第二模式中，两个谐振单元串联连接，并且两个全桥整流器并联连接。对于单个谐振单元和全桥整流器的增益保持基本不变，开关频率被限制在合适的范围内，通过控制开关使直流-直流变换器提供高输入电压范围和低输出电压范围。Fig. 4 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application. As shown in FIG. 4, according to an exemplary embodiment of the present application, the DC-DC converter is configured to operate in a second mode of a high input voltage range and a low output voltage range, wherein: the first switch K1, the fifth switch K5 and the sixth switch K6 are closed, and the second switch K2, the third switch K3, and the fourth switch K4 are open. In the second mode, the gain in the circuit is low. For the traditional resonant circuit topology, in order to achieve low gain, the switching frequency needs to be very high, which will increase the switching frequency range of the element, making it difficult to obtain the advantage of low power loss of some switching elements. In the second mode shown in FIG. 4, two resonant units are connected in series, and two full-bridge rectifiers are connected in parallel. The gain of the single resonant unit and the full-bridge rectifier remains basically unchanged, the switching frequency is limited to an appropriate range, and the DC-DC converter is controlled to provide a high input voltage range and a low output voltage range.
图5是根据本申请示例性实施例的直流-直流变换器的拓扑图。如图5所示，根据本申请的示例性实施例，直流-直流变换器被配置为在低输入电压范围和高输出电压范围的第三模式下运行，其中：第二开关K2、第三开关K3和第四开关K4闭合，并且第一开关K1、第五开关K5、和第六开关K6断开。在第三模式中，电路中的增益高。对于传统的谐振电路拓扑结构，控制策略难以设置，因为在高增益下，开关频率的小变化会导致电压增益的大的改变。而在如图5所示的第三模式中，两个谐振单元并联连接，并且两个全桥整流器串联连接。对于单个谐振单元和全桥整流器的增益保持基本不变，***具有简单的控制策略，以这样的方式，可以通过控制开关使直流-直流变换 器提供低输入电压范围和高输出电压范围。Fig. 5 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application. As shown in FIG. 5, according to an exemplary embodiment of the present application, the DC-DC converter is configured to operate in a third mode of a low input voltage range and a high output voltage range, wherein: the second switch K2, the third switch K3 and the fourth switch K4 are closed, and the first switch K1, the fifth switch K5, and the sixth switch K6 are opened. In the third mode, the gain in the circuit is high. For the traditional resonant circuit topology, the control strategy is difficult to set, because at high gain, a small change in the switching frequency will cause a large change in the voltage gain. In the third mode shown in FIG. 5, two resonant units are connected in parallel, and two full-bridge rectifiers are connected in series. The gain of a single resonant unit and full-bridge rectifier remains basically unchanged, and the system has a simple control strategy. In this way, the DC-DC converter can be controlled to provide a low input voltage range and a high output voltage range by controlling the switch.
图6是根据本申请示例性实施例的直流-直流变换器的拓扑图。如图6所示，根据本申请的示例性实施例，直流-直流变换器被配置为在正常输入电压范围和正常输出电压范围的第四模式下运行，其中：第三开关K3、第四开关K4、第五开关K5和第六开关K6闭合，并且第一开关K1和第二开关K2断开。在第四模式中，两个谐振单元并联连接，并且两个全桥整流器并联连接，输入电压和输出电压具有很小的波动，***具有简单的控制策略。以这样的方式，可以通过控制开关使直流-直流变换器提供正常输入电压范围和正常输出电压范围。Fig. 6 is a topology diagram of a DC-DC converter according to an exemplary embodiment of the present application. As shown in FIG. 6, according to an exemplary embodiment of the present application, the DC-DC converter is configured to operate in a fourth mode of a normal input voltage range and a normal output voltage range, wherein: the third switch K3, the fourth switch K4, the fifth switch K5, and the sixth switch K6 are closed, and the first switch K1 and the second switch K2 are open. In the fourth mode, two resonant units are connected in parallel, and two full-bridge rectifiers are connected in parallel, the input voltage and output voltage have small fluctuations, and the system has a simple control strategy. In this way, the DC-DC converter can provide the normal input voltage range and the normal output voltage range by controlling the switch.
在本申请的上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。In the above-mentioned embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in an embodiment, reference may be made to related descriptions of other embodiments.
在本申请所提供的几个实施例中，应理解到，所揭露的技术内容，可通过其它的方式实现。其中，以上所描述的装置实施例仅仅是示意性的，例如所述单元或模块的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或模块或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，模块或单元的间接耦合或通信连接，可以是电性或其它的形式。In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the above-described device embodiments are merely illustrative, for example, the division of the units or modules is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or modules or components. Can be combined or integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, modules or units, and may be in electrical or other forms.
所述作为分离部件说明的单元或模块可以是或者也可以不是物理上分开的，作为单元或模块显示的部件可以是或者也可以不是物理单元或模块，即可以位于一个地方，或者也可以分布到多个网络单元或模块上。可以根据实际的需要选择其中的部分或者全部单元或模块来实现本实施例方案的目的。The units or modules described as separate parts may or may not be physically separate, and the parts displayed as units or modules may or may not be physical units or modules, that is, they may be located in one place, or they may be distributed to Multiple network units or modules. Some or all of the units or modules may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
另外，在本申请各个实施例中的各功能单元或模块可以集成在一个处理单元或模块中，也可以是各个单元或模块单独物理存在，也可以两个或两个以上单元或模块集成在一个单元或模块中。上述集成的单元或模块既可以采用硬件的形式实现，也可以采用软件功能单元或模块的形式实现。In addition, each functional unit or module in each embodiment of the present application can be integrated into one processing unit or module, or each unit or module can exist alone physically, or two or more units or modules can be integrated into one. Unit or module. The above-mentioned integrated units or modules can be implemented in the form of hardware or software functional units or modules.
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者技术方案的全部或部分可以以软件产品的形式体现出来，计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可为个人计算机、服务器或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘 等各种可以存储程序代码的介质。If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program code .
以上所述仅是本申请的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。The above are only the preferred embodiments of this application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of this application, several improvements and modifications can be made, and these improvements and modifications are also Should be regarded as the scope of protection of this application.

Claims (6)

  1. 一种直流-直流变换器，其特征在于，包括：A DC-DC converter is characterized in that it comprises:
    第一谐振单元(LLC1)，所述第一谐振单元的正极端子与电网输入端的正极连接；The first resonance unit (LLC1), the positive terminal of the first resonance unit is connected to the positive terminal of the power grid input terminal;
    第二谐振单元(LLC2)，所述第二谐振单元的负极端子与电网输入端的负极连接；The second resonance unit (LLC2), the negative terminal of the second resonance unit is connected to the negative terminal of the power grid input terminal;
    第一全桥整流器(FUB1)，所述第一全桥整流器的正极端子与电网输出端的正极连接；A first full-bridge rectifier (FUB1), the positive terminal of the first full-bridge rectifier is connected to the positive terminal of the power grid output terminal;
    第二全桥整流器(FUB2)，所述第二全桥整流器的负极端子与电网输出端的负极连接；A second full-bridge rectifier (FUB2), the negative terminal of the second full-bridge rectifier is connected to the negative terminal of the power grid output terminal;
    第一变压器(T1)，所述第一变压器设置在所述第一谐振单元与所述第一全桥整流器之间；A first transformer (T1), the first transformer is arranged between the first resonance unit and the first full-bridge rectifier;
    第二变压器(T2)，所述第二变压器设置在所述第二谐振单元与所述第二全桥整流器之间；A second transformer (T2), the second transformer is arranged between the second resonance unit and the second full bridge rectifier;
    第一开关(K1)，所述第一谐振单元的负极端子通过所述第一开关与所述第二谐振单元的正极端子连接；以及A first switch (K1), the negative terminal of the first resonance unit is connected to the positive terminal of the second resonance unit through the first switch; and
    第二开关(K2)，所述第一全桥整流器的负极端子通过所述第二开关与所述第二全桥整流器的正极端子连接。The second switch (K2), the negative terminal of the first full-bridge rectifier is connected to the positive terminal of the second full-bridge rectifier through the second switch.
  2. 根据权利要求1所述的直流-直流变换器，其特征在于，还包括：The DC-DC converter according to claim 1, further comprising:
    第三开关(K3)，所述第一谐振单元的正极端子通过所述第三开关与所述第二谐振单元的正极端子连接；A third switch (K3), the positive terminal of the first resonance unit is connected to the positive terminal of the second resonance unit through the third switch;
    第四开关(K4)，所述第一谐振单元的负极端子通过所述第四开关与所述第二谐振单元的负极端子连接；A fourth switch (K4), the negative terminal of the first resonance unit is connected to the negative terminal of the second resonance unit through the fourth switch;
    第五开关(K5)，所述第一全桥整流器的负极端子通过所述第五开关与所述第二全桥整流器的负极端子连接；以及A fifth switch (K5), the negative terminal of the first full-bridge rectifier is connected to the negative terminal of the second full-bridge rectifier through the fifth switch; and
    第六开关(K6)，所述第一全桥整流器的正极端子通过所述第六开关与所述第二全桥整流器的正极端子连接。The sixth switch (K6), the positive terminal of the first full-bridge rectifier is connected to the positive terminal of the second full-bridge rectifier through the sixth switch.
  3. 根据权利要求2所述的直流-直流变换器，其特征在于，所述直流-直流变换器被配置为在第一模式下运行，在所述第一模式下：The DC-DC converter of claim 2, wherein the DC-DC converter is configured to operate in a first mode, and in the first mode:
    所述第一开关和所述第二开关闭合，并且所述第三开关、所述第四开关、所述第五开关和所述第六开关断开。The first switch and the second switch are closed, and the third switch, the fourth switch, the fifth switch, and the sixth switch are open.
  4. 根据权利要求2所述的直流-直流变换器，其特征在于，所述直流-直流变换器被配置为在第二模式下运行，在所述第二模式下：The DC-DC converter of claim 2, wherein the DC-DC converter is configured to operate in a second mode, and in the second mode:
    所述第一开关、所述第五开关和所述第六开关闭合，并且所述第二开关、所述第三开关和所述第四开关断开。The first switch, the fifth switch, and the sixth switch are closed, and the second switch, the third switch, and the fourth switch are open.
  5. 根据权利要求2所述的直流-直流变换器，其特征在于，所述直流-直流变换器被配置为在第三模式下运行，在所述第三模式下：The DC-DC converter of claim 2, wherein the DC-DC converter is configured to operate in a third mode, and in the third mode:
    所述第二开关、所述第三开关和所述第四开关闭合，并且所述第一开关、所述第五开关、和所述第六开关断开。The second switch, the third switch, and the fourth switch are closed, and the first switch, the fifth switch, and the sixth switch are open.
  6. 根据权利要求2所述的直流-直流变换器，其特征在于，所述直流-直流变换器被配置为在第四模式下运行，在所述第四模式下：The DC-DC converter of claim 2, wherein the DC-DC converter is configured to operate in a fourth mode, and in the fourth mode:
    所述第三开关、所述第四开关、所述第五开关和所述第六开关闭合，并且所述第一开关和所述第二开关断开。The third switch, the fourth switch, the fifth switch, and the sixth switch are closed, and the first switch and the second switch are open.
PCT/CN2019/079518 2019-03-25 2019-03-25 Dc-dc converter WO2020191578A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112366950A (en) * 2020-11-02 2021-02-12 湖南大学 Electrodeless control series/parallel bidirectional power circuit and control method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003259643A (en) * 2002-03-04 2003-09-12 Orc Mfg Co Ltd Current resonance type soft switching power circuit
CN104410278A (en) * 2014-12-26 2015-03-11 阳光电源股份有限公司 DCDC converter
CN106160491A (en) * 2016-06-30 2016-11-23 浙江大学 Wide-voltage range High-current output DC/DC changer
CN106655771A (en) * 2016-08-31 2017-05-10 深圳市航天新源科技有限公司 Power supply converter suitable for coach powered by hydrogen proton membrane fuel cell
CN206611337U (en) * 2017-04-06 2017-11-03 湖州旭源电气科技有限公司 A kind of multistage LLC resonant converter circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003259643A (en) * 2002-03-04 2003-09-12 Orc Mfg Co Ltd Current resonance type soft switching power circuit
CN104410278A (en) * 2014-12-26 2015-03-11 阳光电源股份有限公司 DCDC converter
CN106160491A (en) * 2016-06-30 2016-11-23 浙江大学 Wide-voltage range High-current output DC/DC changer
CN106655771A (en) * 2016-08-31 2017-05-10 深圳市航天新源科技有限公司 Power supply converter suitable for coach powered by hydrogen proton membrane fuel cell
CN206611337U (en) * 2017-04-06 2017-11-03 湖州旭源电气科技有限公司 A kind of multistage LLC resonant converter circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112366950A (en) * 2020-11-02 2021-02-12 湖南大学 Electrodeless control series/parallel bidirectional power circuit and control method thereof

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