CN104779795A - High-gain direct-current boost converter based on improved impedance source - Google Patents
High-gain direct-current boost converter based on improved impedance source Download PDFInfo
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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
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
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- 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
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Abstract
本发明公开的一种基于改进阻抗源的高增益直流升压变换器，涉及一种高增益直流升压变换器，属于电力电子变换器技术领域。本发明包括直流电压源、改进阻抗源网络、MOS管和输出滤波电路。直流电压源正端连接改进阻抗源网络的输入端，改进阻抗源网络输出端分别连接MOS管的漏极和输出滤波电路的正端，MOS管的源极分别连接直流电压源负端和输出滤波电路的负端，输出滤波电路的另两端连接负载。本发明可利用较低的开关占空比实现高倍数升压，改进阻抗源网络电容电压应力较低，不存在启动冲击电流问题。相较传统Boost升压变换器，本发明在实现相同输出电压增益下，开关占空比更小，开关损耗更小，系统效率更高。
The invention discloses a high-gain DC boost converter based on an improved impedance source, relates to a high-gain DC boost converter, and belongs to the technical field of power electronic converters. The invention includes a DC voltage source, an improved impedance source network, a MOS tube and an output filter circuit. The positive end of the DC voltage source is connected to the input end of the improved impedance source network, the output end of the improved impedance source network is respectively connected to the drain of the MOS transistor and the positive end of the output filter circuit, and the source of the MOS transistor is respectively connected to the negative end of the DC voltage source and the output filter The negative end of the circuit, and the other two ends of the output filter circuit are connected to the load. The present invention can realize high multiple step-up by using a relatively low switch duty ratio, the improved impedance source network has low capacitive voltage stress, and does not have the problem of start-up surge current. Compared with the traditional Boost converter, the present invention has smaller switch duty cycle, smaller switch loss and higher system efficiency under the same output voltage gain.
Description
技术领域technical field
本发明涉及一种直流升压变换器，特别涉及一种高增益直流升压变换器，属于电力电子变换器技术领域。The invention relates to a DC boost converter, in particular to a high-gain DC boost converter, and belongs to the technical field of power electronic converters.
背景技术Background technique
随着化石能源使用带来的环境问题日益严重，以光伏、风电和燃料电池为代表的清洁型新能源发电得到飞速发展。在光伏和燃料电池发电中，光伏电池单体和燃料电池单体输出电压较低，通常将多个单体进行串并联组合来满足一定的功率和电压等级。一方面大量单体的串并联需解决均压和均流问题，将大大降低系统的可靠性；另一方面光伏和燃料电池的输出随外界环境和负载的变化而宽范围变化，无法满足用电设备或并网发电的要求。With the increasingly serious environmental problems caused by the use of fossil energy, clean new energy power generation represented by photovoltaics, wind power and fuel cells has developed rapidly. In photovoltaic and fuel cell power generation, the output voltage of photovoltaic cells and fuel cells is low, and multiple cells are usually combined in series and parallel to meet a certain power and voltage level. On the one hand, the series-parallel connection of a large number of monomers needs to solve the problem of voltage equalization and current equalization, which will greatly reduce the reliability of the system; equipment or grid-connected power generation requirements.
为此，通常在输出侧接入DC/DC升压变换器，用以稳定和提高输出电压。目前常用传统Boost变换器作为该级升压变换器，Boost变换器虽然理论上具备无穷大电压增益，但实际使用中能达到的电压增益较低。为实现较高增益，开关占空比将接近1，使得开关器件导通时间过长而截止时间过短，导致损耗和温升过大，变换器工作效率较低。For this reason, a DC/DC boost converter is usually connected to the output side to stabilize and increase the output voltage. At present, the traditional Boost converter is commonly used as the step-up converter of this stage. Although the Boost converter has infinite voltage gain in theory, the voltage gain that can be achieved in actual use is relatively low. In order to achieve a higher gain, the switch duty cycle will be close to 1, making the switching device conduction time too long and the cut-off time too short, resulting in excessive loss and temperature rise, and low converter efficiency.
近几年提出的基于Z源(阻抗源)的直流升压变换器是一种高增益直流升压变换拓扑，相较传统Boost拓扑可利用较低开关占空比实现较高输出电压增益，同等条件下开关损耗更小，系统效率更高。但传统Z源拓扑存在启动冲击电流大，Z源网络电容电压应力高的问题。另一方面，升压比较高时，Z源拓扑变换器的开关占空比接近0.5，仍将带来开关损耗和系统效率问题。The DC boost converter based on Z source (impedance source) proposed in recent years is a high-gain DC boost conversion topology. Compared with the traditional Boost topology, it can use a lower switch duty cycle to achieve higher output voltage gain. Under these conditions, the switching loss is smaller and the system efficiency is higher. However, the traditional Z-source topology has the problems of large start-up surge current and high voltage stress on the Z-source network capacitor. On the other hand, when the boost ratio is high, the switching duty cycle of the Z-source topology converter is close to 0.5, which will still cause switching loss and system efficiency problems.
发明内容Contents of the invention
本发明针对传统Boost变换器高增益时开关损耗大，系统效率低和Z源型直流升压拓扑启动冲击电流大、电容电压应力高和高增益时开关损耗大的问题。本发明公开的一种基于改进阻抗源的高增益直流升压变换器，要解决的技术问题是降低传统Boost变换器高增益时的开关损耗，减小Z源型直流升压拓扑的启动冲击电流、电容电压应力和高增益时的开关损耗，提高系统效率。The invention aims at the problems of large switching loss when the traditional Boost converter has high gain, low system efficiency, large start-up impulse current of the Z-source DC boost topology, high capacitance voltage stress and large switching loss when the gain is high. The invention discloses a high-gain DC boost converter based on an improved impedance source. The technical problem to be solved is to reduce the switching loss of the traditional Boost converter at high gain and reduce the start-up surge current of the Z-source DC boost topology. , Capacitor voltage stress and switching loss at high gain, improving system efficiency.
本发明的目的是通过以下技术方案实现的：The purpose of the present invention is achieved through the following technical solutions:
本发明的一种基于改进阻抗源的高增益直流升压变换器，包括直流电压源、改进阻抗源网络、MOS管和输出滤波电路。所述的改进阻抗源网络在实现同样输出电压增益下可降低MOS管的占空比，进而降低开关损耗，此外，所述的改进阻抗源网络还可用于抑制启动冲击电流。具体连接关系如下：A high-gain DC step-up converter based on the improved impedance source of the present invention includes a DC voltage source, an improved impedance source network, a MOS transistor and an output filter circuit. The improved impedance source network can reduce the duty cycle of the MOS transistor while achieving the same output voltage gain, thereby reducing the switching loss. In addition, the improved impedance source network can also be used to suppress the start-up surge current. The specific connection relationship is as follows:
直流电压源正端连接改进阻抗源网络的输入端，改进阻抗源网络输出端分别连接MOS管的漏极和输出滤波电路的正端，MOS管的源极分别连接直流电压源负端和输出滤波电路的负端，输出滤波电路的另两端连接负载。由于所述的改进阻抗源网络串联于直流电压源和MOS管之间，因此可降低电容电压应力。The positive end of the DC voltage source is connected to the input end of the improved impedance source network, the output end of the improved impedance source network is respectively connected to the drain of the MOS transistor and the positive end of the output filter circuit, and the source of the MOS transistor is respectively connected to the negative end of the DC voltage source and the output filter The negative end of the circuit, and the other two ends of the output filter circuit are connected to the load. Since the improved impedance source network is connected in series between the DC voltage source and the MOS transistor, the capacitor voltage stress can be reduced.
所述的一种基于改进阻抗源的高增益直流升压变换器的工作过程为：直流电压源提供输入电压，改进阻抗源网络和MOS管组成升压电路，将直流电压源电压升压后，通过输出滤波电路供给负载。所述的改进阻抗源网络在实现同样输出电压增益下可降低MOS管的占空比，进而降低高增益时开关损耗，提高系统效率。由于所述的改进阻抗源网络串联于直流电压源和MOS管之间，因此可降低电容电压应力。The working process of the high-gain DC boost converter based on the improved impedance source is as follows: the DC voltage source provides the input voltage, the improved impedance source network and the MOS tube form a boost circuit, and after the voltage of the DC voltage source is boosted, It is supplied to the load through the output filter circuit. The improved impedance source network can reduce the duty cycle of the MOS tube when achieving the same output voltage gain, thereby reducing switching loss at high gain and improving system efficiency. Since the improved impedance source network is connected in series between the DC voltage source and the MOS transistor, the capacitor voltage stress can be reduced.
所述改进阻抗源网络由两路相同的开关电感、两个等值电容C1和C2、功率二极管D7组成；所述的两路相同的开关电感包括第一路开关电感和第二路开关电感。所述第一路开关电感的上端作为改进阻抗源网络的输入，第二路开关电感的上端作为改进阻抗源网络的输出；所述两个等值电容呈X形放置；两个等值电容之间不连接；等值电容C1的负端连接第一路开关电感的上端，等值电容C1的正端连接功率二极管D7的阴极和第二路开关电感的下端；等值电容C2的正端连接第二路开关电感的上端，等值电容C2的负端连接功率二极管D7的阳极和第一路开关电感的下端。由于改进阻抗源网络采用两路开关电感代替传统阻抗源网络电感，利用开关电感的并联充电和串联放电特性，可利用较低的电感充电时间，实现高电压增益输出，从而在同样输出电压增益下，降低开关占空比。The improved impedance source network is composed of two identical switching inductors, two equivalent capacitors C1 and C2, and a power diode D7; the two identical switching inductors include a first switching inductor and a second switching inductor. The upper end of the first switch inductance is used as the input of the improved impedance source network, and the upper end of the second switch inductance is used as the output of the improved impedance source network; the two equivalent capacitors are placed in an X shape; the two equivalent capacitors are The negative end of the equivalent capacitor C1 is connected to the upper end of the first switch inductor, the positive end of the equivalent capacitor C1 is connected to the cathode of the power diode D7 and the lower end of the second switch inductor; the positive end of the equivalent capacitor C2 is connected to The upper end of the second switching inductor and the negative end of the equivalent capacitor C2 are connected to the anode of the power diode D7 and the lower end of the first switching inductor. Since the improved impedance source network uses two switch inductors instead of the traditional impedance source network inductor, the parallel charging and series discharging characteristics of the switching inductors can be used to achieve high voltage gain output with a lower inductor charging time, so that the same output voltage gain , reducing the switching duty cycle.
作为优选，所述第一路开关电感由功率二极管D1、D2、D3和电感L1、L2组成；所述功率二极管D1的阳极连接L1的上端，D1的阴极连接D2的阴极和L2的上端，D2的阳极连接L1的下端和D3的阳极，D3的阴极连接L2的下端。Preferably, the first switching inductance is composed of power diodes D1, D2, D3 and inductors L1, L2; the anode of the power diode D1 is connected to the upper end of L1, the cathode of D1 is connected to the cathode of D2 and the upper end of L2, D2 The anode of D3 is connected to the lower end of L1 and the anode of D3, and the cathode of D3 is connected to the lower end of L2.
所述第二路开关电感由功率二极管D4、D5、D6和电感L3、L4组成；所述功率二极管D4的阳极连接电感L3的下端，功率二极管D4的阴极连接功率二极管D5的阴极和电感L4的下端，功率二极管D5的阳极连接电感L3的上端和功率二极管D6的阳极，功率二极管D6的阴极连接电感L4的上端。The second switch inductor is composed of power diodes D4, D5, D6 and inductors L3, L4; the anode of the power diode D4 is connected to the lower end of the inductor L3, and the cathode of the power diode D4 is connected to the cathode of the power diode D5 and the inductor L4. At the lower end, the anode of the power diode D5 is connected to the upper end of the inductor L3 and the anode of the power diode D6, and the cathode of the power diode D6 is connected to the upper end of the inductor L4.
所述电感L1、L2、L3、L4电感值均相同。The inductance values of the inductors L1, L2, L3, and L4 are all the same.
作为优选，所述MOS管S1的漏极连接阻抗源网络输出端，S1的源极连接电源负端。Preferably, the drain of the MOS transistor S1 is connected to the output terminal of the impedance source network, and the source of the MOS transistor S1 is connected to the negative terminal of the power supply.
作为优选，所述输出滤波电路由功率二极管D8和电容Cf组成；所述功率二极管D8的阳极作为输出滤波电路的正端，功率二极管D8的阳极连接MOS管S1的漏极，功率二极管D8的阴极连接电容Cf的正端；所述电容Cf的负端作为输出滤波电路的负端，电容Cf负端连接直流电压源的负端。Preferably, the output filter circuit is composed of a power diode D8 and a capacitor Cf; the anode of the power diode D8 is used as the positive terminal of the output filter circuit, the anode of the power diode D8 is connected to the drain of the MOS transistor S1, and the cathode of the power diode D8 Connect the positive terminal of the capacitor Cf; the negative terminal of the capacitor Cf is used as the negative terminal of the output filter circuit, and the negative terminal of the capacitor Cf is connected to the negative terminal of the DC voltage source.
有益效果：Beneficial effect:
1、在同样电压增益下，相较传统Boost升压变换器和Z源型直流升压变换器，本发明公开的一种基于改进阻抗源的高增益直流升压变换器，采用改进阻抗源网络，改进阻抗源网络在同样输出电压增益下可降低MOS管的占空比，进而降低高增益时开关损耗，工作效率更高。此外，改进阻抗源网络还可用于抑制启动冲击电流，相比传统Z源型直流升压变换器，本发明所提拓扑不存在启动冲击电流。1. Under the same voltage gain, compared with traditional Boost converters and Z-source DC boost converters, the present invention discloses a high-gain DC boost converter based on an improved impedance source, using an improved impedance source network , Improving the impedance source network can reduce the duty cycle of the MOS tube under the same output voltage gain, thereby reducing the switching loss at high gain, and the work efficiency is higher. In addition, the improved impedance source network can also be used to suppress the start-up inrush current. Compared with the traditional Z-source DC boost converter, there is no start-up inrush current in the topology proposed by the present invention.
2、本发明公开的一种基于改进阻抗源的高增益直流升压变换器，由于改进阻抗源网络串联于直流电压源和MOS管之间，因此可降低电容电压应力。2. A high-gain DC boost converter based on the improved impedance source disclosed in the present invention can reduce the capacitor voltage stress because the improved impedance source network is connected in series between the DC voltage source and the MOS tube.
附图说明Description of drawings
图1为本发明所提出的高增益直流升压变换器拓扑结构图；Fig. 1 is the topological structure diagram of the high-gain DC boost converter proposed by the present invention;
图2为基于Z源的直流升压变换器启动电流通路示意图(图中实线部分表示有电流流过，虚线部分表示无电流流过)；Fig. 2 is a schematic diagram of the starting current path of the DC boost converter based on the Z source (the solid line in the figure indicates that there is current flowing, and the dotted line indicates that there is no current flowing);
图3为本发明所提变换器工作在MOS管导通时的电路图；Fig. 3 is the circuit diagram when the proposed converter of the present invention works when the MOS tube is turned on;
图4为本发明所提变换器工作在MOS管关断时的电路图；Fig. 4 is the circuit diagram when the proposed converter of the present invention works when the MOS tube is turned off;
图5(a)为三种升压变换器输出电压增益对比图，图5(b)为本发明和基于传统Z源的直流升压拓扑电容电压应力对比图。Fig. 5(a) is a comparative diagram of the output voltage gains of three boost converters, and Fig. 5(b) is a comparative diagram of capacitor voltage stress of the DC boost topology based on the present invention and the traditional Z source.
具体实施方式Detailed ways
下面结合附图对本发明进行详细描述。本实施例在以本发明技术方案为前提下进行实施，给出了详细的实施方式和具体的操作过程，但本发明的保护范围不限于下述的实施例。The present invention will be described in detail below in conjunction with the accompanying drawings. This embodiment is carried out on the premise of the technical solution of the present invention, and the detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.
实施例1Example 1
图1为本实施例一种基于改进阻抗源的高增益直流升压变换器的拓扑示意图，如图1所示，一种基于改进阻抗源的高增益直流升压变换器包括直流电压源、改进阻抗源网络、MOS管和输出滤波电路。所述的改进阻抗源网络在同样输出电压增益下可降低MOS管的占空比，进而降低高增益时开关损耗，此外，所述的改进阻抗源网络还可用于抑制启动冲击电流。Fig. 1 is a topological diagram of a high-gain DC boost converter based on an improved impedance source in this embodiment. As shown in Fig. 1, a high-gain DC boost converter based on an improved impedance source includes a DC voltage source, an improved Impedance source network, MOS tube and output filter circuit. The improved impedance source network can reduce the duty cycle of the MOS transistor under the same output voltage gain, thereby reducing the switching loss at high gain. In addition, the improved impedance source network can also be used to suppress the start-up surge current.
具体连接关系如下：直流电压源正端连接改进阻抗源网络的输入端，改进阻抗源网络输出端分别连接MOS管的漏极和输出滤波电路的正端，MOS管的源极分别连接直流电压源负端和输出滤波电路的负端，输出滤波电路的另两端连接负载。由于所述的改进阻抗源网络串联于直流电压源和MOS管之间，因此可降低电容电压应力。The specific connection relationship is as follows: the positive end of the DC voltage source is connected to the input end of the improved impedance source network, the output end of the improved impedance source network is respectively connected to the drain of the MOS transistor and the positive end of the output filter circuit, and the source of the MOS transistor is respectively connected to the DC voltage source The negative terminal and the negative terminal of the output filter circuit, and the other two ends of the output filter circuit are connected to the load. Since the improved impedance source network is connected in series between the DC voltage source and the MOS transistor, the capacitor voltage stress can be reduced.
所述的一种基于改进阻抗源的高增益直流升压变换器的工作过程为：直流电压源提供输入电压，改进阻抗源网络和MOS管组成升压电路，将直流电压源电压升压后，通过输出滤波电路供给负载。所述的改进阻抗源网络在同样输出电压增益下可降低MOS管的占空比，进而降低高增益时开关损耗，提高系统效率。由于所述的改进阻抗源网络串联于直流电压源和MOS管之间，因此可降低电容电压应力。The working process of the high-gain DC boost converter based on the improved impedance source is as follows: the DC voltage source provides the input voltage, the improved impedance source network and the MOS tube form a boost circuit, and after the voltage of the DC voltage source is boosted, It is supplied to the load through the output filter circuit. The improved impedance source network can reduce the duty cycle of the MOS transistor under the same output voltage gain, thereby reducing the switching loss at high gain and improving the system efficiency. Since the improved impedance source network is connected in series between the DC voltage source and the MOS transistor, the capacitor voltage stress can be reduced.
所述改进阻抗源网络由两路相同的开关电感、两个等值电容C1和C2、功率二极管D7组成；所述的两路相同的开关电感包括第一路开关电感和第二路开关电感。所述第一路开关电感的上端作为改进阻抗源网络的输入，第二路开关电感的上端作为改进阻抗源网络的输出；所述两个等值电容呈X形放置；两个等值电容之间不连接；等值电容C1的负端连接第一路开关电感的上端，等值电容C1的正端连接功率二极管D7的阴极和第二路开关电感的下端；等值电容C2的正端连接第二路开关电感的上端，等值电容C2的负端连接功率二极管D7的阳极和第一路开关电感的下端。由于改进阻抗源网络采用两路开关电感代替传统阻抗源网络电感，利用开关电感的并联充电和串联放电特性，可利用较低的电感充电时间，实现高电压增益输出，从而在同样输出电压增益下，降低开关占空比。The improved impedance source network is composed of two identical switching inductors, two equivalent capacitors C1 and C2, and a power diode D7; the two identical switching inductors include a first switching inductor and a second switching inductor. The upper end of the first switch inductance is used as the input of the improved impedance source network, and the upper end of the second switch inductance is used as the output of the improved impedance source network; the two equivalent capacitors are placed in an X shape; The negative end of the equivalent capacitor C1 is connected to the upper end of the first switch inductor, the positive end of the equivalent capacitor C1 is connected to the cathode of the power diode D7 and the lower end of the second switch inductor; the positive end of the equivalent capacitor C2 is connected to The upper end of the second switching inductor and the negative end of the equivalent capacitor C2 are connected to the anode of the power diode D7 and the lower end of the first switching inductor. Since the improved impedance source network uses two switch inductors instead of the traditional impedance source network inductor, the parallel charging and series discharging characteristics of the switching inductors can be used to achieve high voltage gain output with a lower inductor charging time, so that the same output voltage gain , reducing the switching duty cycle.
具体的，第一路开关电感由功率二极管D1、D2、D3和电感L1、L2组成，功率二极管D1的阳极连接电感L1的上端，功率二极管D1的阴极连接功率二极管D2的阴极和电感L2的上端，功率二极管D2的阳极连接电感L1的下端和功率二极管D3的阳极，功率二极管D3的阴极连接电感L2的下端。Specifically, the first switching inductor is composed of power diodes D1, D2, D3 and inductors L1, L2. The anode of the power diode D1 is connected to the upper end of the inductor L1, and the cathode of the power diode D1 is connected to the cathode of the power diode D2 and the upper end of the inductor L2. , the anode of the power diode D2 is connected to the lower end of the inductor L1 and the anode of the power diode D3, and the cathode of the power diode D3 is connected to the lower end of the inductor L2.
具体的，第二路开关电感由功率二极管D4、D5、D6和电感L3、L4组成，功率二极管D4的阳极连接电感L3的下端，功率二极管D4的阴极连接功率二极管D5的阴极和电感L4的下端，功率二极管D5的阳极连接电感L3的上端和功率二极管D6的阳极，功率二极管D6的阴极连接电感L4的上端。Specifically, the second switching inductor is composed of power diodes D4, D5, D6 and inductors L3, L4, the anode of the power diode D4 is connected to the lower end of the inductor L3, and the cathode of the power diode D4 is connected to the cathode of the power diode D5 and the lower end of the inductor L4 , the anode of the power diode D5 is connected to the upper end of the inductor L3 and the anode of the power diode D6, and the cathode of the power diode D6 is connected to the upper end of the inductor L4.
具体的，电感L1、L2、L3、L4电感值均相同。Specifically, the inductance values of the inductors L1, L2, L3, and L4 are all the same.
具体的，MOS管S1的漏极连接阻抗源网络输出端，S1的源极连接电源负端。Specifically, the drain of the MOS transistor S1 is connected to the output terminal of the impedance source network, and the source of the S1 is connected to the negative terminal of the power supply.
具体的，输出滤波电路由功率二极管D8和电容Cf组成，功率二极管D8的阳极作为输出滤波电路的正端，D8的阳极连接MOS管S1的漏极，功率二极管D8的阴极连接电容Cf的正端，电容Cf的负端作为输出滤波电路的负端，电容Cf负端连接直流电压源的负端，负载并联在电容Cf两端。Specifically, the output filter circuit is composed of a power diode D8 and a capacitor Cf, the anode of the power diode D8 is used as the positive terminal of the output filter circuit, the anode of D8 is connected to the drain of the MOS transistor S1, and the cathode of the power diode D8 is connected to the positive terminal of the capacitor Cf , the negative terminal of the capacitor Cf is used as the negative terminal of the output filter circuit, the negative terminal of the capacitor Cf is connected to the negative terminal of the DC voltage source, and the load is connected in parallel to both ends of the capacitor Cf.
本实施例的一种基于改进阻抗源的高增益直流升压变换器的具体工作过程：A specific working process of a high-gain DC boost converter based on an improved impedance source in this embodiment:
如图3所示，模态1为开关电感充电过程：MOS管S1导通，此时功率二极管D2、D5、D7、D8均截止。电容C1与直流电压源通过S1给第二路开关电感充电，其中功率二极管D4、D6导通，D5截止，电感L3与L4并联充电；电容C2与直流电压源通过S1给第一路开关电感充电，其中功率二极管D1、D3导通，D2截止，电感L1与L2并联充电。As shown in Figure 3, mode 1 is the switching inductor charging process: MOS transistor S1 is turned on, and power diodes D2, D5, D7, and D8 are all turned off at this time. Capacitor C1 and the DC voltage source charge the second switch inductor through S1, where the power diodes D4 and D6 are turned on, D5 is turned off, and the inductors L3 and L4 are connected in parallel to charge; capacitor C2 and the DC voltage source charge the first switch inductor through S1 , wherein the power diodes D1 and D3 are turned on, D2 is turned off, and the inductance L1 and L2 are charged in parallel.
由于D8截止，滤波电容Cf放电供给负载。Due to the cut-off of D8, the filter capacitor Cf discharges to supply the load.
如图4所示，模态2为开关电感放电过程，MOS管S1关断，此时功率二极管D1、D3、D4、D6截止。第一路开关电感通过D7给电容C1充电，其中，D1、D3截止，D2导通，电感L1与L2串联放电；第二路开关电感通过D7给电容C2充电，其中，D4、D6截止，D5导通，电感L3与L4串联放电。As shown in Figure 4, mode 2 is the switching inductor discharge process, the MOS transistor S1 is turned off, and the power diodes D1, D3, D4, and D6 are turned off at this time. The first switching inductance charges the capacitor C1 through D7, where D1 and D3 are cut off, D2 is turned on, and the inductor L1 and L2 are discharged in series; the second switching inductance charges the capacitor C2 through D7, where D4 and D6 are cut off, and D5 conduction, the inductance L3 and L4 are discharged in series.
由于D8导通，直流电源通过D7、第一路和第二路开关电感给负载供电，同时给滤波电容Cf充电。Since D8 is turned on, the DC power supplies power to the load through D7, the first and second switching inductors, and charges the filter capacitor Cf at the same time.
稳态时，输出电压Vo与直流电源电压Vin的关系为：其中D为MOS管占空比。改进阻抗源网络电容电压VC与直流电源电压的关系为：基于Z源的直流升压变换拓扑中Z源电容电压与直流电源电压的关系为：输出电压增益为：传统Boost直流升压变换拓扑输出电压增益为： In steady state, the relationship between the output voltage V o and the DC power supply voltage V in is: Among them, D is the duty cycle of the MOS tube. The relationship between the capacitance voltage V C of the improved impedance source network and the DC power supply voltage is: The relationship between the Z-source capacitor voltage and the DC power supply voltage in the Z-source-based DC boost conversion topology is: The output voltage gain is: The output voltage gain of the traditional Boost DC boost conversion topology is:
三种拓扑的输出电压增益B与开关占空比D的关系如图5(a)所示，在同样输出电压增益下，本实施例所述的拓扑需要的开关占空比远远小于另两种拓扑，因此开关损耗更小，系统效率更高。基于Z源的直流升压变换器启动时存在如图2所示的电流通路，直流电源和Z源网络内两个等值电容直接串联，由于启动时等值电容电压为0，相当于直流侧电源发生短路，电路中将流过很大的冲击电流。本实施例所述的升压变换拓扑启动时不存在上述串联通路，因此不存在启动冲击电流。本实施例和基于Z源的直流升压变换器电容电压应力如图5(b)所示，整体来看本实施例所述的拓扑电容电压应力小于基于Z源的升压变换拓扑。The relationship between the output voltage gain B and the switch duty cycle D of the three topologies is shown in Figure 5(a). Under the same output voltage gain, the switch duty cycle required by the topology described in this embodiment is much smaller than that of the other two topologies. This topology results in lower switching losses and higher system efficiency. There is a current path as shown in Figure 2 when the DC boost converter based on the Z source is started. The DC power supply and the two equivalent capacitors in the Z source network are directly connected in series. Since the voltage of the equivalent capacitor is 0 at startup, it is equivalent to If the power supply is short-circuited, a large inrush current will flow in the circuit. The above-mentioned series path does not exist when the boost conversion topology described in this embodiment is started, so there is no start-up surge current. This embodiment and the capacitor voltage stress of the DC boost converter based on the Z source are shown in Figure 5(b). Overall, the capacitor voltage stress of the topology described in this embodiment is smaller than that of the boost conversion topology based on the Z source.
以上所述的具体描述，对发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施例而已，并不用于限定本发明的保护范围，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The specific description above further elaborates the purpose, technical solution and beneficial effect of the invention. It should be understood that the above description is only a specific embodiment of the present invention and is not used to limit the protection of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634275A (en) * | 2016-03-23 | 2016-06-01 | 西安工业大学 | Boost converter of switch inductor |
| CN108462391A (en) * | 2018-03-13 | 2018-08-28 | 广东工业大学 | A kind of impedance network DC-DC converter |
| CN109462330A (en) * | 2018-11-13 | 2019-03-12 | 天津大学 | The high voltage boosting dc converter of belt switch inductance and switching capacity |
| CN111697826A (en) * | 2020-06-02 | 2020-09-22 | 上海交通大学 | Parallel charging and serial discharging type high-power booster circuit and control method thereof |
| CN114726215A (en) * | 2022-04-19 | 2022-07-08 | 广东工业大学 | Grid-shaped impedance network soft switching high-gain boost converter |
| CN115864816A (en) * | 2022-11-07 | 2023-03-28 | 三峡大学 | Sepic type power correction circuit based on switch inductance |
| CN118659651A (en) * | 2024-05-31 | 2024-09-17 | 中山市宝利金电子有限公司 | Power supply circuit for DC microgrid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882869A (en) * | 2010-06-21 | 2010-11-10 | 华南理工大学 | High Gain Boost Converter with LC Switching Network |
| CN102223095A (en) * | 2011-06-21 | 2011-10-19 | 哈尔滨工业大学（威海） | High-gain Z-source inverter |
| CN103490628A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Single-phase high-gain boost converter |
-
2015
- 2015-04-28 CN CN201510206683.0A patent/CN104779795A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882869A (en) * | 2010-06-21 | 2010-11-10 | 华南理工大学 | High Gain Boost Converter with LC Switching Network |
| CN102223095A (en) * | 2011-06-21 | 2011-10-19 | 哈尔滨工业大学（威海） | High-gain Z-source inverter |
| CN103490628A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Single-phase high-gain boost converter |
Non-Patent Citations (1)
| Title |
|---|
| OMAR ABDEL-RAHIM 等: "Modified Maximum Power Point Tracking Technique Based on Fixed Frequency Model Predictive Control for PV Applications", 《INDUSTRIAL ELECTRONICS SOCIETY, IECON 2014 - 40TH ANNUAL CONFERENCE OF THE IEEE》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105634275A (en) * | 2016-03-23 | 2016-06-01 | 西安工业大学 | Boost converter of switch inductor |
| CN108462391A (en) * | 2018-03-13 | 2018-08-28 | 广东工业大学 | A kind of impedance network DC-DC converter |
| CN109462330A (en) * | 2018-11-13 | 2019-03-12 | 天津大学 | The high voltage boosting dc converter of belt switch inductance and switching capacity |
| CN111697826A (en) * | 2020-06-02 | 2020-09-22 | 上海交通大学 | Parallel charging and serial discharging type high-power booster circuit and control method thereof |
| CN111697826B (en) * | 2020-06-02 | 2021-08-31 | 上海交通大学 | A parallel-charging-serial-amplifying high-speed booster circuit and its control method |
| CN114726215A (en) * | 2022-04-19 | 2022-07-08 | 广东工业大学 | Grid-shaped impedance network soft switching high-gain boost converter |
| CN114726215B (en) * | 2022-04-19 | 2022-11-08 | 广东工业大学 | High-gain boost converter for soft switching of impedance network shaped like Chinese character' tian |
| CN115864816A (en) * | 2022-11-07 | 2023-03-28 | 三峡大学 | Sepic type power correction circuit based on switch inductance |
| CN118659651A (en) * | 2024-05-31 | 2024-09-17 | 中山市宝利金电子有限公司 | Power supply circuit for DC microgrid |
| CN118659651B (en) * | 2024-05-31 | 2024-12-03 | 中山市宝利金电子有限公司 | Power supply circuit for DC microgrid |
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