CN105119486A - Low voltage stress bidirectional DC/DC converter - Google Patents
Low voltage stress bidirectional DC/DC converter Download PDFInfo
- Publication number
- CN105119486A CN105119486A CN201510612655.9A CN201510612655A CN105119486A CN 105119486 A CN105119486 A CN 105119486A CN 201510612655 A CN201510612655 A CN 201510612655A CN 105119486 A CN105119486 A CN 105119486A
- Authority
- CN
- China
- Prior art keywords
- buck
- voltage
- port
- source
- power switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims description 64
- 238000000034 method Methods 0.000 description 6
- 238000011217 control strategy Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
一种低电压应力双向DC/DC变换器，包含两个功率电感，两个功率开关，两个直流源和n个升降压单元，其中左端为低压直流源，右端为高压直流源；该拓扑可以实现能量的双向流动，即当左端的低压直流源作为输入源时，电路可作为一个升压变换器，将较低的直流电压转换为高压，当右端的高压直流源作为输入源时，此时电路可以作为一个升压变换器，将已知高压变换为所需低压；其中，当作为升压变换器时，升降压单元中的开关管可视为二极管；同理，当作为降压变换器时，输入侧两个开关管可视为两个二极管；该拓扑主要用于输入输出电压变化比较大的场合；与现有的双向变换器相比，本发明电路拓扑、变换器控制器设计及实现方案简单，不含有变压器及耦合电感，EMI特性好。本发明电路拓扑简单，并且可以大幅降低开关器件的电压应力，变换器整体工作效率得到了提高。
A low-voltage stress bidirectional DC/DC converter, including two power inductors, two power switches, two DC sources and n buck-boost units, in which the left end is a low-voltage DC source and the right end is a high-voltage DC source; the topology The two-way flow of energy can be realized, that is, when the low-voltage DC source at the left end is used as the input source, the circuit can be used as a boost converter to convert the lower DC voltage to high voltage, and when the high-voltage DC source at the right end is used as the input source, this The circuit can be used as a boost converter to convert the known high voltage into the required low voltage; wherein, when used as a boost converter, the switch tube in the buck-boost unit can be regarded as a diode; similarly, when used as a step-down In the case of a converter, the two switching tubes on the input side can be regarded as two diodes; this topology is mainly used in occasions where the input and output voltages vary greatly; compared with the existing bidirectional converter, the circuit topology and converter controller of the present invention The design and implementation scheme is simple, does not contain transformers and coupled inductors, and has good EMI characteristics. The circuit topology of the invention is simple, and the voltage stress of the switching device can be greatly reduced, and the overall working efficiency of the converter is improved.
Description
技术领域 technical field
本发明涉及一种直流-直流变换器，具体说是一种低电压应力双向DC/DC变换器。 The invention relates to a DC-DC converter, in particular to a low voltage stress bidirectional DC/DC converter.
背景技术 Background technique
在现有技术中，基本的双向buck-boost变换器其开关器件的电压应力为输入输出端电压较高侧电压，在直流输配电系统中，存在开关器件电压应力过大的问题。目前主要解决方案是通过模块化多电平的结构来降低各个开关器件的电压应力，但该方案存在各个子模块内部均流困难、控制策略复杂以及驱动复杂成本高等缺点。 In the prior art, the voltage stress of the switching device of the basic bidirectional buck-boost converter is the higher side voltage of the input and output terminals. In the direct current transmission and distribution system, there is a problem of excessive voltage stress of the switching device. At present, the main solution is to reduce the voltage stress of each switching device through a modular multi-level structure, but this solution has disadvantages such as difficulty in current sharing within each sub-module, complex control strategy, and high cost of driving complexity.
发明内容 Contents of the invention
解决传统方案开关器件电压应力高的问题，提出一种低电压应力双向DC/DC变换器，不含有变压器和耦合电感，EMI特性好，电路拓扑简单，控制系统设计和实现难度均较低。 To solve the problem of high voltage stress of switching devices in traditional solutions, a low voltage stress bidirectional DC/DC converter is proposed, which does not contain transformers and coupled inductors, has good EMI characteristics, simple circuit topology, and low difficulty in control system design and implementation.
本发明所采用的技术方案是： The technical scheme adopted in the present invention is:
一种低电压应力双向DC/DC变换器，包含第一电感L1、第二电感L2，两个功率开关Sa、Sb，一个电容C0、一个低压直流源V1、一个高压直流源V2和n个升降压单元。该发明拓扑主要用于两端电压相差较大且需要实现能量双向流动的应用场合。其电路连接关系为： A low voltage stress bidirectional DC/DC converter, comprising a first inductance L1, a second inductance L2, two power switches Sa, Sb, a capacitor C0, a low voltage DC source V1, a high voltage DC source V2 and n l Buck unit. The topology of the invention is mainly used in applications where the voltage difference between the two ends is large and bidirectional flow of energy needs to be realized. Its circuit connection relationship is:
第一电感L1和第二电感L2的输入端、电容C0的上端同时接低压直流源V1的正极，第一电感L1和第二电感L2的输出端分别接两个功率开关Sa、Sb的漏极，电容C0的下端、低压直流源V1的负极与功率开关Sa、功率开关Sb的源极相连； The input ends of the first inductance L1 and the second inductance L2, and the upper end of the capacitor C0 are simultaneously connected to the positive pole of the low-voltage DC source V1, and the output ends of the first inductance L1 and the second inductance L2 are respectively connected to the drains of two power switches Sa and Sb , the lower end of the capacitor C0 and the negative pole of the low-voltage DC source V1 are connected to the source poles of the power switch Sa and the power switch Sb;
第一电感L1的输出端接第一个升降压单元的第一接口，同时接第偶数次个升降压单元的上下两个电容之间的节点； The output terminal of the first inductor L1 is connected to the first interface of the first buck-boost unit, and at the same time connected to the node between the upper and lower capacitors of the even-numbered buck-boost unit;
第二电感L2的输出端接第奇数次个升降压单元的上下两个电容之间的节点； The output terminal of the second inductance L2 is connected to a node between the upper and lower capacitors of the odd-numbered buck-boost unit;
第n个单元的第二、三个端口分别作为变换器输出端的正极和负极，与高压直流源V2的正负极相连； The second and third ports of the nth unit are respectively used as the positive pole and the negative pole of the output terminal of the converter, and are connected to the positive and negative poles of the high-voltage DC source V2;
第一个升降压单元的第二端口接第二个升降压单元的第一端口，第一个升降压单元的第三端口接第二个升降压单元的第四端口，第二个升降压单元的第二端口接第三个升降压单元的第一端口，第二个升降压单元的第三端口接第三个升降压单元的第四端口，以次类推，直到n个升降压单元； The second port of the first buck-boost unit is connected to the first port of the second buck-boost unit, the third port of the first buck-boost unit is connected to the fourth port of the second buck-boost unit, and the second The second port of the first buck-boost unit is connected to the first port of the third buck-boost unit, the third port of the second buck-boost unit is connected to the fourth port of the third buck-boost unit, and so on, Up to n buck-boost units;
其中，升降压单元由两个功率开关和两个电容组成，两个电容上下串联，上方功率开关的源极作为第一端口，上方电容与功率开关的漏极的结点作为第二端口，下方电容与下方功率开关的源极的结点作为第三端口，下方功率开关的漏极作为第四端口； Wherein, the buck-boost unit is composed of two power switches and two capacitors, the two capacitors are connected in series up and down, the source of the upper power switch is used as the first port, and the junction of the upper capacitor and the drain of the power switch is used as the second port, The junction of the lower capacitor and the source of the lower power switch is used as the third port, and the drain of the lower power switch is used as the fourth port;
各功率开关的栅极分别接各自的控制器。 The grids of the power switches are respectively connected to their respective controllers.
n为自然数，取值范围为n≧1。 n is a natural number, and the value range is n≧1.
一种低电压应力双向DC/DC变换器，其控制方式为各相功率开关采用交错控制策略；即升压模式时，功率开关Sa、Sb驱动相位之间相差180°，降压模式时，奇数次功率开关和偶数次功率开关驱动相位之间相差180°。 A low-voltage stress bidirectional DC/DC converter, the control method of which is that the power switches of each phase adopt an interleaved control strategy; that is, in the boost mode, the drive phases of the power switches Sa and Sb differ by 180°, and in the buck mode, the odd number There is a 180° difference between the driving phases of the secondary power switch and the even-numbered power switch.
相比现有技术，本发明一种低电压应力双向DC/DC变换器，具有如下有益效果： Compared with the prior art, a low voltage stress bidirectional DC/DC converter of the present invention has the following beneficial effects:
1）、电路中开关器件的电压应力低，所有功率开关的电压应力均降为传统变换器的n分之一。 1) The voltage stress of switching devices in the circuit is low, and the voltage stress of all power switches is reduced to one-nth of that of traditional converters.
2）、与现有的双向变换器相比，不含有变压器和耦合电感，EMI特性好，电路拓扑简单，控制系统设计和实现难度均较低。 2) Compared with the existing bidirectional converter, it does not contain transformers and coupled inductors, has good EMI characteristics, simple circuit topology, and low difficulty in design and implementation of the control system.
附图说明 Description of drawings
图1是本发明所提出的一般电路原理图。 Fig. 1 is a schematic diagram of the general circuit proposed by the present invention.
图2是本发明所采取具体实施方式的电路原理图。 Fig. 2 is a schematic circuit diagram of a specific embodiment of the present invention.
图3是是本发明中所提出的单一升降压单元电路图。 FIG. 3 is a circuit diagram of a single buck-boost unit proposed in the present invention.
图3中：①-第一端口，②-第二端口，③-第三端口，④-第四端口。 In Fig. 3: ①-the first port, ②-the second port, ③-the third port, ④-the fourth port.
具体实施方式 Detailed ways
一种低电压应力双向DC/DC变换器，包含第一电感L1、第二电感L2，两个功率开关Sa、Sb，一个电容C0、一个低压直流源V1、一个高压直流源V2和n个升降压单元。该发明拓扑主要用于两端电压相差较大且需要实现能量双向流动的应用场合。其电路连接关系为： A low voltage stress bidirectional DC/DC converter, comprising a first inductance L1, a second inductance L2, two power switches Sa, Sb, a capacitor C0, a low voltage DC source V1, a high voltage DC source V2 and n l Buck unit. The topology of the invention is mainly used in applications where the voltage difference between the two ends is large and bidirectional flow of energy needs to be realized. Its circuit connection relationship is:
第一电感L1和第二电感L2的输入端、电容C0的上端同时接低压直流源V1的正极，第一电感L1和第二电感L2的输出端分别接两个功率开关Sa、Sb的漏极，电容C0的下端、低压直流源V1的负极与功率开关Sa、功率开关Sb的源极相连； The input ends of the first inductance L1 and the second inductance L2, and the upper end of the capacitor C0 are simultaneously connected to the positive pole of the low-voltage DC source V1, and the output ends of the first inductance L1 and the second inductance L2 are respectively connected to the drains of two power switches Sa and Sb , the lower end of the capacitor C0 and the negative pole of the low-voltage DC source V1 are connected to the source poles of the power switch Sa and the power switch Sb;
第一电感L1的输出端接第一个升降压单元的第一接口，同时接第偶数次个升降压单元的上下两个电容之间的节点； The output terminal of the first inductor L1 is connected to the first interface of the first buck-boost unit, and at the same time connected to the node between the upper and lower capacitors of the even-numbered buck-boost unit;
第二电感L2的输出端接第奇数次个升降压单元的上下两个电容之间的节点； The output terminal of the second inductance L2 is connected to a node between the upper and lower capacitors of the odd-numbered buck-boost unit;
第n个单元的第二、三个端口分别作为变换器输出端的正极和负极，与高压直流源V2的正负极相连； The second and third ports of the nth unit are respectively used as the positive pole and the negative pole of the output terminal of the converter, and are connected to the positive and negative poles of the high-voltage DC source V2;
第一个升降压单元的第二端口接第二个升降压单元的第一端口，第一个升降压单元的第三端口接第二个升降压单元的第四端口，第二个升降压单元的第二端口接第三个升降压单元的第一端口，第二个升降压单元的第三端口接第三个升降压单元的第四端口，以次类推，直到n个升降压单元； The second port of the first buck-boost unit is connected to the first port of the second buck-boost unit, the third port of the first buck-boost unit is connected to the fourth port of the second buck-boost unit, and the second The second port of the first buck-boost unit is connected to the first port of the third buck-boost unit, the third port of the second buck-boost unit is connected to the fourth port of the third buck-boost unit, and so on, Up to n buck-boost units;
其中，升降压单元由两个功率开关和两个电容组成，两个电容上下串联，上方功率开关的源极作为第一端口，上方电容与功率开关的漏极的结点作为第二端口，下方电容与下方功率开关的源极的结点作为第三端口，下方功率开关的漏极作为第四端口； Wherein, the buck-boost unit is composed of two power switches and two capacitors, the two capacitors are connected in series up and down, the source of the upper power switch is used as the first port, and the junction of the upper capacitor and the drain of the power switch is used as the second port, The junction of the lower capacitor and the source of the lower power switch is used as the third port, and the drain of the lower power switch is used as the fourth port;
各功率开关的栅极分别接各自的控制器。 The grids of the power switches are respectively connected to their respective controllers.
n为自然数，取值范围为n≧1。 n is a natural number, and the value range is n≧1.
一种低电压应力双向DC/DC变换器，其控制方式为各相功率开关采用交错控制策略；即升压模式时，功率开关Sa、Sb驱动相位之间相差180°，降压模式时，奇数次功率开关和偶数次功率开关驱动相位之间相差180°。 A low-voltage stress bidirectional DC/DC converter, the control method of which is that the power switches of each phase adopt an interleaved control strategy; that is, in the boost mode, the drive phases of the power switches Sa and Sb differ by 180°, and in the buck mode, the odd number There is a 180° difference between the driving phases of the secondary power switch and the even-numbered power switch.
实施例： Example:
如图2所示，以含有四个升降压单元为例的一种低电压应力双向DC/DC变换器为例，包含第一电感L1、第二电感L2，10个功率开关Sa、Sb、S1、S2、S3、S4、S5、S6、S7、S8和8个电容C1、C2、C3、C4、C5、C6、C7、C8；其电路连接关系为： As shown in Figure 2, taking a low-voltage stress bidirectional DC/DC converter with four buck-boost units as an example, it includes a first inductor L1, a second inductor L2, and 10 power switches Sa, Sb, S1, S2, S3, S4, S5, S6, S7, S8 and 8 capacitors C1, C2, C3, C4, C5, C6, C7, C8; the circuit connection relationship is:
第一电感L1和第二电感L2的输入端、电容C0的上端同时接低压直流源V1的正极，第一电感L1和第二电感L2的输出端分别接两个功率开关Sa、Sb的漏极，电容C0的下端、低压直流源V1的负极与功率开关Sa、Sb的源极相连。 The input ends of the first inductance L1 and the second inductance L2, and the upper end of the capacitor C0 are simultaneously connected to the positive pole of the low-voltage DC source V1, and the output ends of the first inductance L1 and the second inductance L2 are respectively connected to the drains of two power switches Sa and Sb , the lower end of the capacitor C0 and the negative pole of the low-voltage direct current source V1 are connected to the sources of the power switches Sa and Sb.
第一电感L1的输出端接第一个升降压单元的第一接口，同时接第二个和第四个升降压单元的上下两个电容之间的节点；第二电感L2的输出端接第一个和第三个升降压单元的上下两个电容之间的节点；第四个单元的第二、三个端口分别作为输出端的正极和负极，与高压直流源V2的正负极相连； The output terminal of the first inductor L1 is connected to the first interface of the first buck-boost unit, and at the same time connected to the node between the upper and lower capacitors of the second and fourth buck-boost units; the output terminal of the second inductor L2 Connect the node between the upper and lower capacitors of the first and third buck-boost units; the second and third ports of the fourth unit are respectively used as the positive and negative poles of the output terminal, and the positive and negative poles of the high-voltage DC source V2 connected;
第一个升降压单元的第二端口接第二个升降压单元的第一端口，第一个升降压单元的第三端口接第二个升降压单元的第四端口；第二个升降压单元的第二端口接第三个升降压单元的第一端口，第二个升降压单元的第三端口接第三个升降压单元的第四端口；第三个升降压单元的第二端口接第四个升降压单元的第一端口，第三个升降压单元的第三端口接第四个升降压单元的第四端口。 The second port of the first buck-boost unit is connected to the first port of the second buck-boost unit, and the third port of the first buck-boost unit is connected to the fourth port of the second buck-boost unit; The second port of the first buck-boost unit is connected to the first port of the third buck-boost unit, and the third port of the second buck-boost unit is connected to the fourth port of the third buck-boost unit; The second port of the buck unit is connected to the first port of the fourth buck-boost unit, and the third port of the third buck-boost unit is connected to the fourth port of the fourth buck-boost unit.
其中，升降压单元由两个功率开关和两个电容组成，两个电容上下串联，上方开关管的源极作为第一端口，上方电容与开关管的漏极的结点作为第二端口，下方电容与下方开关的源极的结点作为第三端口，下方开关管的漏极作为第四端口。 Wherein, the buck-boost unit is composed of two power switches and two capacitors, the two capacitors are connected in series up and down, the source of the upper switch tube is used as the first port, and the node between the upper capacitor and the drain of the switch tube is used as the second port, The junction of the lower capacitor and the source of the lower switch serves as the third port, and the drain of the lower switch transistor serves as the fourth port.
各功率开关的栅极分别接各自的控制器。 The grids of the power switches are respectively connected to their respective controllers.
根据能量流动方向的不同，可以将电路分为两种工作方式： According to the direction of energy flow, the circuit can be divided into two working modes:
1)：升压模式：根据功率开关状态不同分为以下3种工作状态： 1): Boost mode: According to the different states of the power switch, it is divided into the following 3 working states:
模态1：控制器控制功率开关Sa、Sb导通，此时低压电源V1通过功率开关Sa和功率开关Sb分别向电感L1和电感L2充电；电容C3和C4给此时的高压直流源V2充电；功率开关S1、S2、S3、S4、S5、S6、S7、S8均关断。 Mode 1: The controller controls the power switches Sa and Sb to be turned on. At this time, the low-voltage power supply V1 charges the inductor L1 and the inductor L2 respectively through the power switch Sa and the power switch Sb; the capacitors C3 and C4 charge the high-voltage DC source V2 at this time. ; The power switches S1, S2, S3, S4, S5, S6, S7, and S8 are all turned off.
模态2：控制器控制功率开关Sa导通，Sb关断，S2、S6、S3、S7体二极管导通。此时电感L2的电流一部分通过开关管S2及低压输入电源V1向电容C2充电，一部分通过电容C4、开关管S6、开关管Sa及低压电源V1向电容C6充电，一部分通过电容C1、开关管S3、开关管Sa及低压电源V1向电容C3充电，另一部分通过电容C5、开关管S7、开关管Sa及低压电源V1向电容C7充电，一部分流经电容C5、开关管S7、电容C8，该过程中低压输入电源V1、电感L2、电容C4、C1、C5、C8均处于放电状态，电容C2、C6、C3、C7处于充电状态；此时功率开关Sa保持开通状态，低压电源V1通过功率开关Sa向电感L1充电。 Mode 2: The controller controls the power switch Sa to be turned on, Sb to be turned off, and the body diodes of S2, S6, S3, and S7 to be turned on. At this time, part of the current of the inductor L2 charges the capacitor C2 through the switch tube S2 and the low-voltage input power supply V1, part of it charges the capacitor C6 through the capacitor C4, the switch tube S6, the switch tube Sa and the low-voltage power supply V1, and part of it passes through the capacitor C1 and the switch tube S3 , the switch tube Sa and the low-voltage power supply V1 charge the capacitor C3, and the other part charges the capacitor C7 through the capacitor C5, the switch tube S7, the switch tube Sa and the low-voltage power supply V1, and a part flows through the capacitor C5, the switch tube S7, and the capacitor C8. The medium and low voltage input power supply V1, inductor L2, capacitors C4, C1, C5, and C8 are all in the discharging state, and the capacitors C2, C6, C3, and C7 are in the charging state; at this time, the power switch Sa remains on, and the low-voltage power supply V1 passes through the power switch Sa Charges the inductor L1.
模态3：控制器控制功率开关Sb导通，Sa关断，S1、S4、S5、S8体二极管导通。此时电感L1的电流一部分通过开关管S1及低压电源V1向电容C1充电，一部分通过电容C2、开关管S4、Sb及低压电源V1向电容C4充电，一部分通过电容C3、开关管S5、开关S2及低压电源V1向电容C5充电，另一部分通过电容C6、开关管S8、开关Sb及低压电源V1向电容C8充电，一部分流经电容C7、开关管S8、电容C6，该过程中低压电源V1、电感L1、电容C2、C6、C3、C7处于放电状态，电容C4、C1、C5、C8均处于充电状态；此时功率开关Sb保持开通状态，低压电源V1通过功率开关Sb向电感L2充电。 Mode 3: The controller controls the power switch Sb to be turned on, Sa to be turned off, and the body diodes of S1, S4, S5, and S8 to be turned on. At this time, part of the current of the inductor L1 charges the capacitor C1 through the switch tube S1 and the low-voltage power supply V1, partly charges the capacitor C4 through the capacitor C2, the switch tubes S4, Sb and the low-voltage power supply V1, and partly passes through the capacitor C3, the switch tube S5, and the switch S2 And the low-voltage power supply V1 charges the capacitor C5, and the other part charges the capacitor C8 through the capacitor C6, the switch tube S8, the switch Sb and the low-voltage power supply V1, and a part flows through the capacitor C7, the switch tube S8, and the capacitor C6. During the process, the low-voltage power supply V1, Inductor L1, capacitors C2, C6, C3, and C7 are in a discharging state, and capacitors C4, C1, C5, and C8 are in a charging state; at this time, the power switch Sb remains on, and the low-voltage power supply V1 charges the inductor L2 through the power switch Sb.
2）、降压模式：根据功率开关状态不同分为以下3种工作状态： 2) Step-down mode: According to the different states of the power switch, it is divided into the following 3 working states:
模态1：控制器控制功率开关S2、S3、S6、S7导通，S1、S4、S5、S8关断，Sa的体二极管导通，Sb关断。L1的电流经Sa向输出电容C0和低压电源V1放电；L2的电流一部分经S2向C2充电，一部分通过S3、C1向C3充电，一部分通过S6、C4向C6充电，同时另一部分流经S7、C5、C8及高压电源V2向C7充电，在这一过程中，高压电源V2、L1、C1、C4、C5、C8放电，L2、C2、C3、C6、C7充电，高压电源V2给电容C1、C2充电。 Mode 1: The controller controls the power switches S2, S3, S6, and S7 to turn on, S1, S4, S5, and S8 to turn off, the body diode of Sa to turn on, and Sb to turn off. The current of L1 discharges to the output capacitor C0 and the low-voltage power supply V1 through Sa; part of the current of L2 charges C2 through S2, part of it charges C3 through S3 and C1, and part of it charges C6 through S6 and C4, while the other part flows through S7, C5, C8 and high-voltage power supply V2 charge C7. In this process, high-voltage power supply V2, L1, C1, C4, C5, and C8 discharge, L2, C2, C3, C6, and C7 charge, and high-voltage power supply V2 charges capacitors C1, C2 charges.
模态2：控制器控制功率开关S1、S3、S5、S7、S2、S4、S6、S8关 Mode 2: The controller controls the power switches S1, S3, S5, S7, S2, S4, S6, S8 to close
断，Sa和Sb的体二极管导通。该模态，电感L1、L2给电容C0和低压电源V1充电。 The body diodes of Sa and Sb are turned on. In this mode, the inductors L1 and L2 charge the capacitor C0 and the low-voltage power supply V1.
模态3：控制器控制功率开关S1、S4、S5、S8导通，S2、S3、S6、S7关断，Sb的体二极管导通，Sa关断。L2的电流经Sb向输出电容C0和低压电源V1放电；L1的电流一部分经S1向C1充电，一部分通过S4、C2向C4充电，一部分通过S5、C3向C5充电，同时另一部分通过S8、C6、C7及高压电源V2向C8充电，在这一过程中，L1、C1、C4、C5、C8充电，L2、C2、C3、C6、C7放电，高压电源V2给电容C1、C2充电。 Mode 3: The controller controls the power switches S1, S4, S5, and S8 to turn on, S2, S3, S6, and S7 to turn off, the body diode of Sb to turn on, and Sa to turn off. The current of L2 discharges to the output capacitor C0 and the low-voltage power supply V1 through Sb; part of the current of L1 charges C1 through S1, part of it charges C4 through S4 and C2, part of it charges C5 through S5 and C3, and the other part passes through S8 and C6 , C7 and high-voltage power supply V2 charge C8. In this process, L1, C1, C4, C5, and C8 are charged, L2, C2, C3, C6, and C7 are discharged, and high-voltage power supply V2 charges capacitors C1 and C2.
综上所述，本发明所提变换器既可以将电压从较低值升为较高值，又可以将高压变换为较低的电压，实现了能量的双向流动，同时具备开关器件电压应力低的优点。 To sum up, the converter proposed in the present invention can not only increase the voltage from a lower value to a higher value, but also convert high voltage to a lower voltage, realize the bidirectional flow of energy, and at the same time have low voltage stress of switching devices The advantages.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510612655.9A CN105119486A (en) | 2015-09-23 | 2015-09-23 | Low voltage stress bidirectional DC/DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510612655.9A CN105119486A (en) | 2015-09-23 | 2015-09-23 | Low voltage stress bidirectional DC/DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105119486A true CN105119486A (en) | 2015-12-02 |
Family
ID=54667408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510612655.9A Pending CN105119486A (en) | 2015-09-23 | 2015-09-23 | Low voltage stress bidirectional DC/DC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105119486A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108023476A (en) * | 2017-12-14 | 2018-05-11 | 天津大学 | Energy composite energy source electric car switching capacity molded breadth gain two-way DC converter |
| US10020737B1 (en) | 2016-12-19 | 2018-07-10 | Hewlett Packard Enterprise Development Lp | Plurality of converters extending duty cycle by checking voltage thresholds |
| CN110445382A (en) * | 2019-09-11 | 2019-11-12 | 珠海格力电器股份有限公司 | Bidirectional DC conversion circuit, bidirectional DC converter and electrical equipment |
| CN111082662A (en) * | 2019-12-11 | 2020-04-28 | 西安工业大学 | A high-gain bidirectional soft-switching DC/DC converter based on fully coupled inductors |
| CN113796004A (en) * | 2021-01-29 | 2021-12-14 | 华为数字能源技术有限公司 | Conversion circuit, voltage conversion device and electric automobile |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1508957A1 (en) * | 2003-08-22 | 2005-02-23 | Alcatel | System for controlling the energy flow in an energy conversion system |
| CN101803163A (en) * | 2007-08-31 | 2010-08-11 | 科世达工程电子有限责任公司 | With the multi-channel DC controller of independently of output power with critical conduction mode work |
| CN102208868A (en) * | 2011-04-29 | 2011-10-05 | 南京航空航天大学 | Direct-current to direct-current converter with high boost transformation ratio |
| CN102223068A (en) * | 2011-06-23 | 2011-10-19 | 安徽工业大学 | Combined type DC-DC (direct current) converter |
| CN102510218A (en) * | 2011-11-04 | 2012-06-20 | 安徽工业大学 | Direct current to direct current (DC-DC) power converter with high boost ratio |
| CN102969917A (en) * | 2012-10-26 | 2013-03-13 | 中国电力科学研究院 | Two-way buck-boost direct current (DC) converter applied to energy storage system |
| CN102969893A (en) * | 2012-12-12 | 2013-03-13 | 重庆大学 | High-gain boosting type direct-current converter |
| CN103066834A (en) * | 2012-12-12 | 2013-04-24 | 重庆大学 | Staggered parallel high-gain boost type direct current (DC) converter |
| CN103872920A (en) * | 2014-03-13 | 2014-06-18 | 北京理工大学 | Leakage inductance current slope direct control method of isolation type two-way three-level converter |
| CN103944401A (en) * | 2014-04-29 | 2014-07-23 | 上海交通大学 | Bidirectional high-voltage DC/DC control method of multi-coil single-phase intermediate-frequency square wave transformer |
| CN203734529U (en) * | 2013-10-23 | 2014-07-23 | 国家电网公司 | Novel bidirectional bipolar direct-current converter |
| TW201436437A (en) * | 2013-03-13 | 2014-09-16 | Univ Yuan Ze | High-efficiency bidirectional single-input and multi-outputs DC/DC converter |
| CN104218801A (en) * | 2014-09-26 | 2014-12-17 | 三峡大学 | Non-isolated high-gain DC/DC convertor |
| US20150131330A1 (en) * | 2013-11-14 | 2015-05-14 | National Tsing Hua University | Bidirectional dc-dc converter system and circuit thereof |
-
2015
- 2015-09-23 CN CN201510612655.9A patent/CN105119486A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1508957A1 (en) * | 2003-08-22 | 2005-02-23 | Alcatel | System for controlling the energy flow in an energy conversion system |
| CN101803163A (en) * | 2007-08-31 | 2010-08-11 | 科世达工程电子有限责任公司 | With the multi-channel DC controller of independently of output power with critical conduction mode work |
| CN102208868A (en) * | 2011-04-29 | 2011-10-05 | 南京航空航天大学 | Direct-current to direct-current converter with high boost transformation ratio |
| CN102223068A (en) * | 2011-06-23 | 2011-10-19 | 安徽工业大学 | Combined type DC-DC (direct current) converter |
| CN102510218A (en) * | 2011-11-04 | 2012-06-20 | 安徽工业大学 | Direct current to direct current (DC-DC) power converter with high boost ratio |
| CN102969917A (en) * | 2012-10-26 | 2013-03-13 | 中国电力科学研究院 | Two-way buck-boost direct current (DC) converter applied to energy storage system |
| CN102969893A (en) * | 2012-12-12 | 2013-03-13 | 重庆大学 | High-gain boosting type direct-current converter |
| CN103066834A (en) * | 2012-12-12 | 2013-04-24 | 重庆大学 | Staggered parallel high-gain boost type direct current (DC) converter |
| TW201436437A (en) * | 2013-03-13 | 2014-09-16 | Univ Yuan Ze | High-efficiency bidirectional single-input and multi-outputs DC/DC converter |
| CN203734529U (en) * | 2013-10-23 | 2014-07-23 | 国家电网公司 | Novel bidirectional bipolar direct-current converter |
| US20150131330A1 (en) * | 2013-11-14 | 2015-05-14 | National Tsing Hua University | Bidirectional dc-dc converter system and circuit thereof |
| CN103872920A (en) * | 2014-03-13 | 2014-06-18 | 北京理工大学 | Leakage inductance current slope direct control method of isolation type two-way three-level converter |
| CN103944401A (en) * | 2014-04-29 | 2014-07-23 | 上海交通大学 | Bidirectional high-voltage DC/DC control method of multi-coil single-phase intermediate-frequency square wave transformer |
| CN104218801A (en) * | 2014-09-26 | 2014-12-17 | 三峡大学 | Non-isolated high-gain DC/DC convertor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10020737B1 (en) | 2016-12-19 | 2018-07-10 | Hewlett Packard Enterprise Development Lp | Plurality of converters extending duty cycle by checking voltage thresholds |
| CN108023476A (en) * | 2017-12-14 | 2018-05-11 | 天津大学 | Energy composite energy source electric car switching capacity molded breadth gain two-way DC converter |
| CN110445382A (en) * | 2019-09-11 | 2019-11-12 | 珠海格力电器股份有限公司 | Bidirectional DC conversion circuit, bidirectional DC converter and electrical equipment |
| CN111082662A (en) * | 2019-12-11 | 2020-04-28 | 西安工业大学 | A high-gain bidirectional soft-switching DC/DC converter based on fully coupled inductors |
| CN111082662B (en) * | 2019-12-11 | 2022-11-08 | 西安工业大学 | A high-gain bidirectional soft-switching DC/DC converter based on fully coupled inductors |
| CN113796004A (en) * | 2021-01-29 | 2021-12-14 | 华为数字能源技术有限公司 | Conversion circuit, voltage conversion device and electric automobile |
| WO2022160305A1 (en) * | 2021-01-29 | 2022-08-04 | 华为数字能源技术有限公司 | Conversion circuit, voltage conversion apparatus and electric vehicle |
| CN113796004B (en) * | 2021-01-29 | 2024-04-09 | 华为数字能源技术有限公司 | A conversion circuit, a voltage conversion device and an electric vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102946194B (en) | A kind of high-gain alternation and parallel connection boosting converter | |
| CN102969893B (en) | A kind of high gain boost type DC converter | |
| CN105186866B (en) | A kind of non-isolation type soft-switching and high-gain DC/DC converters | |
| CN104052307B (en) | A kind of bridge type modular multi-level two-way switch electric capacity AC-AC Conversion device | |
| CN103187876A (en) | DC/DC circuit for UPS | |
| CN107086782B (en) | A High-Boost DC/DC Converter with Adjustable Phase Number Based on Voltage Doubler Unit | |
| CN107659154B (en) | Bidirectional DC-DC converter circuit | |
| CN203911754U (en) | Interleaved parallel zero-voltage switch-off high-gain DC/DC converter | |
| CN108365746A (en) | A kind of two-way four phase DC-DC converter of high-gain based on coupling inductance and control method | |
| CN108988634B (en) | A three-phase interleaved bidirectional large transformation ratio DCDC converter and its control method | |
| CN105119486A (en) | Low voltage stress bidirectional DC/DC converter | |
| CN106655775B (en) | Two-port input ZVT high-gain Boost converter with soft switch | |
| CN106533173B (en) | High-gain DC/DC converter with adjustable input phase number | |
| CN104868725A (en) | Booster type non-isolated three-port DC converter and control method thereof | |
| CN104218801A (en) | Non-isolated high-gain DC/DC convertor | |
| CN104218800B (en) | A kind of high blood pressure lowering non-isolation type DC/DC changer | |
| CN103066834A (en) | Staggered parallel high-gain boost type direct current (DC) converter | |
| CN105939108A (en) | A Switched Inductance Quasi-Switch Step-Up DC-DC Converter | |
| CN107171562A (en) | Isolated converter and method of work based on bus type equalising network | |
| CN206878702U (en) | A High Boost DC/DC Converter Based on Voltage Doubler Unit | |
| CN206962701U (en) | A kind of adjustable high boosting DC/DC converters of number of phases based on voltage doubling unit | |
| CN104734496B (en) | A kind of SEPIC feeds buck-boost converter | |
| CN206294079U (en) | A kind of two-port input ZVT high-gain Boosts containing Sofe Switch | |
| CN204068701U (en) | A Non-isolated DC/DC Converter with High Step-Down Ratio | |
| CN204068702U (en) | A Non-isolated High Gain DC/DC Converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151202 |
|
| RJ01 | Rejection of invention patent application after publication |