高增益非隔离型Boost变换器拓扑及其衍生方法研究
发布时间：2018-11-23 17:44
【摘要】：近年来,随着全球变暖和一次性能源的逐渐枯竭,太阳能、风能和燃料电池等绿色可再生能源的开发和利用在世界范围内备受瞩目。然而,光伏电池和燃料电池等可再生能源的电力输出通常是在较宽范围内变化的低直流电压,因此需要具有高电压增益的直流变换器将它们提升到较高的直流电压以满足并网发电或负载需求。另外,高增益直流变换器在HID、通信电源、电动汽车、医疗设备等工业领域具有广泛的应用价值。本文提出并研究了一系列高电压增益直流-直流变换器,探索了电路的构成机理及其衍生方法。全文主要内容如下:本文首先分析了传统Boost和抽头/耦合电感Boost变换器(TI-Boost)内在的结构特点,研究了TI-Boost的升压机理,在此基础上提出了复合抽头/耦合电感单元电路结构。该单元结构集成了多重功能:提高电压增益;钳位开关管的关断电压,降低功率器件的电压应力;可回收利用耦合电感的漏感能量等。进一步构造了复合开关抽头/耦合电感Boost(CSTI-Boost)和复合电源抽头/耦合电感Boost(CVTI-Boost)两种高电压增益直流变换器。在不需极限占空比的情况下,两种变换器均能实现高增益、高效率直流电能变换。论文还提出并研究了一种平方型复合开关抽头/耦合电感Boost变换器(Q-CSTI-Boost),该变换器可以实现更高的电压增益且具有传统Boost输入电流连续的优点。论文深入分析和总结了基于交流变压器和二极管-电容预储能升压单元的倍压整流电路(DCC-TR)工作机理,通过分析该结构的共性,提炼了可实现升压功能的三类二极管-电容升压单元(DCC)结构。通过分解基本Boost变换器拓扑,提出了融合二极管-电容升压单元的高增益Boost变换器(DCC-Boost)拓扑的构造方法。进一步衍生了一系列基于二极管-电容升压单元的单开关Boost变换器,推衍了融合DCC单元的输入端交错并联的两开关高增益Boost变换器(IP-DCC-Boost),及输入、输出均交错串联的Boost变换器(ISOS-DCC-Boost)拓扑结构。对典型IP-DCC-Boost拓扑进行了仿真和实验验证,证明了理论分析的正确性。论文借助模块组合的思想,提出了一种输入并联输出串联的高增益Boost变换器(IPOS Boost-Boost),分析了该变换器的工作原理及特性。通过交错控制,IPOS Boost-Boost的两个电感电流在输入端交错并联,减小了输入电流纹波,输出端的两个电容交错串联充放电,既提高了变换器的电压增益,又能将开关管的电压应力降低一半,有助于提高变换器效率。论文还提出了输入并联输出串联的优化组合式高增益Boost-Sepic变换器(IPOS Boost-Sepic),并引入耦合电感进一步推衍出一系列高增益耦合电感IPOS CI-Boost-Sepic拓扑。在此基础上又将两个开关管合二为一,演绎出一系列输入端共享、输出端串联的单开关高增益ICOS CI-Boost-Sepic变换器拓扑。论文对其中的典型拓扑工作原理及特性进行了理论分析及仿真实验验证,研究结果表明该类变换器不但具有较高的电压增益,而且开关管的电压应力低,同时还具有输入电流连续的优点。为了衍生基于双耦合电感的输入端交错并联三态开关高增益Boost变换器(TSSC-DCI-Boost),根据耦合电感能够提高电压增益的机理,归纳和总结了利用双耦合电感形成“注入电压源”升压单元的基本结构,分析了应用双耦合电感实现高增益TSSC-DCI-Boost需要遵循的基本约束条件。提出了在三态开关Boost变换器不同位置插入基于双耦合电感的“注入电压源”单元生成新型拓扑的方法。基于此方法分别构造了高端叠加型、低端叠加型、混合叠加型、IVPS串联增强型和IVS串联增强型等5类非隔离型TSSC-DCI-Boost变换器拓扑。论文的第六章针对输入电流纹波会对前级变换器或供电电源产生电磁干扰(EMI),甚至影响前级电源的发电效率或使用寿命的问题,提出一类基于耦合电感且具有低输入电流纹波的单相高增益Boost变换器(RR-CI-Boost)。该类变换器既可以在合适占空比条件下,通过调整耦合电感的匝比进一步提高其电压增益,又能降低开关管的电压应力,同时可近似实现零输入电流纹波,有效抑制了电路对输入电源的电磁干扰。
[Abstract]:In recent years, with the gradual depletion of global warming and one-time energy, the development and utilization of green renewable energy, such as solar energy, wind energy and fuel cells, have attracted the attention of the world. However, the power output of a renewable energy source such as a photovoltaic cell and a fuel cell is typically a low DC voltage that varies over a wide range, so that a DC converter having a high voltage gain is required to raise them to a higher DC voltage to meet grid-connected power generation or load demand. in addition, that high-gain DC convert has wide application value in the industrial field of HID, communication power supply, electric automobile, medical equipment and the like. This paper presents and studies a series of high-voltage-gain DC-DC converters, and explores the formation mechanism of the circuit and its derivative method. The main contents of the thesis are as follows: Firstly, the structure characteristics of the traditional Boost and the tap/ coupled inductor Boost converter (TI-Boost) are analyzed, the boosting mechanism of TI-Boost is studied, and the circuit structure of the composite tap/ coupled inductor unit is put forward. The cell structure integrates multiple functions, namely, the voltage gain is improved, the power-off voltage of the clamp-bit switching tube is reduced, the voltage stress of the power device is reduced, and the leakage inductance energy and the like of the coupling inductor can be recovered. The combination switch tap/ coupled inductor boost (CSTI-Boost) and the composite power tap/ coupled inductor boost (CVTI-Boost) are further constructed. In the case of no limit duty cycle, both converters can realize high gain and high efficiency direct current conversion. In this paper, a kind of square-type composite switch tap/ coupled inductive boost converter (Q-CSTI-Boost) is also put forward, which can realize higher voltage gain and has the advantages of continuous current of the traditional Boost input current. In this paper, the working mechanism of the double-voltage rectifier circuit (DCC-TR) based on AC transformer and diode-capacitor pre-energy-storage step-up unit is analyzed and summarized, and three kinds of diode-capacitor step-up unit (DCC) structure which can realize the step-up function can be obtained by analyzing the commonness of the structure. By decomposing the topology of the basic Boost converter, a construction method of a high-gain boost converter (DCC-Boost) topology of a fusion diode-capacitor step-up unit is proposed. A series of single-switch boost converter based on diode-capacitor step-up unit is further derived, and the two-switch high-gain boost converter (IP-DCC-Boost) and the input and output of the two-switch high-gain boost converter (ISOS-DCC-Boost) are arranged in a staggered and parallel manner. The simulation and experimental verification of the typical IP-DCC-Boost topology are carried out, and the correctness of the theoretical analysis is proved. By means of the idea of module combination, a high-gain boost converter (IPOS Boost-Boost) with parallel output series is proposed, and the working principle and characteristics of the converter are analyzed. by the staggered control, the two inductor currents of the IPOS Boost-Boost are staggered in parallel at the input end, the input current ripple is reduced, the two capacitors of the output end are staggered in series to charge and discharge, the voltage gain of the converter is improved, and the voltage stress of the switching tube can be reduced by one half, and the efficiency of the converter can be improved. In this paper, an optimized combined high-gain boost-Sepic converter (IPOS Boost-Sepic), which is connected in series with parallel output, is also introduced, and a series of high-gain coupled inductors (IPOCI-Boost-Sepic) are further derived by introducing the coupling inductance. on the basis of which, two switching tubes are combined, and a series of single-switch high-gain ICOS CI-Boost-Sepic converter topology which is shared by a series of input terminals and connected in series at the output end is realized. The experimental results show that the converter not only has higher voltage gain, but also has the advantages of low voltage stress and continuous input current. In order to derive a high-gain boost converter (TSSC-DCI-Boost) of an input end of a double-coupled inductor and a high-gain boost converter (TSSC-DCI-Boost), the mechanism of the voltage gain can be improved according to the coupling inductance, and the basic structure of a 鈥渋njection voltage source鈥，
本文编号：2352276
[Abstract]:In recent years, with the gradual depletion of global warming and one-time energy, the development and utilization of green renewable energy, such as solar energy, wind energy and fuel cells, have attracted the attention of the world. However, the power output of a renewable energy source such as a photovoltaic cell and a fuel cell is typically a low DC voltage that varies over a wide range, so that a DC converter having a high voltage gain is required to raise them to a higher DC voltage to meet grid-connected power generation or load demand. in addition, that high-gain DC convert has wide application value in the industrial field of HID, communication power supply, electric automobile, medical equipment and the like. This paper presents and studies a series of high-voltage-gain DC-DC converters, and explores the formation mechanism of the circuit and its derivative method. The main contents of the thesis are as follows: Firstly, the structure characteristics of the traditional Boost and the tap/ coupled inductor Boost converter (TI-Boost) are analyzed, the boosting mechanism of TI-Boost is studied, and the circuit structure of the composite tap/ coupled inductor unit is put forward. The cell structure integrates multiple functions, namely, the voltage gain is improved, the power-off voltage of the clamp-bit switching tube is reduced, the voltage stress of the power device is reduced, and the leakage inductance energy and the like of the coupling inductor can be recovered. The combination switch tap/ coupled inductor boost (CSTI-Boost) and the composite power tap/ coupled inductor boost (CVTI-Boost) are further constructed. In the case of no limit duty cycle, both converters can realize high gain and high efficiency direct current conversion. In this paper, a kind of square-type composite switch tap/ coupled inductive boost converter (Q-CSTI-Boost) is also put forward, which can realize higher voltage gain and has the advantages of continuous current of the traditional Boost input current. In this paper, the working mechanism of the double-voltage rectifier circuit (DCC-TR) based on AC transformer and diode-capacitor pre-energy-storage step-up unit is analyzed and summarized, and three kinds of diode-capacitor step-up unit (DCC) structure which can realize the step-up function can be obtained by analyzing the commonness of the structure. By decomposing the topology of the basic Boost converter, a construction method of a high-gain boost converter (DCC-Boost) topology of a fusion diode-capacitor step-up unit is proposed. A series of single-switch boost converter based on diode-capacitor step-up unit is further derived, and the two-switch high-gain boost converter (IP-DCC-Boost) and the input and output of the two-switch high-gain boost converter (ISOS-DCC-Boost) are arranged in a staggered and parallel manner. The simulation and experimental verification of the typical IP-DCC-Boost topology are carried out, and the correctness of the theoretical analysis is proved. By means of the idea of module combination, a high-gain boost converter (IPOS Boost-Boost) with parallel output series is proposed, and the working principle and characteristics of the converter are analyzed. by the staggered control, the two inductor currents of the IPOS Boost-Boost are staggered in parallel at the input end, the input current ripple is reduced, the two capacitors of the output end are staggered in series to charge and discharge, the voltage gain of the converter is improved, and the voltage stress of the switching tube can be reduced by one half, and the efficiency of the converter can be improved. In this paper, an optimized combined high-gain boost-Sepic converter (IPOS Boost-Sepic), which is connected in series with parallel output, is also introduced, and a series of high-gain coupled inductors (IPOCI-Boost-Sepic) are further derived by introducing the coupling inductance. on the basis of which, two switching tubes are combined, and a series of single-switch high-gain ICOS CI-Boost-Sepic converter topology which is shared by a series of input terminals and connected in series at the output end is realized. The experimental results show that the converter not only has higher voltage gain, but also has the advantages of low voltage stress and continuous input current. In order to derive a high-gain boost converter (TSSC-DCI-Boost) of an input end of a double-coupled inductor and a high-gain boost converter (TSSC-DCI-Boost), the mechanism of the voltage gain can be improved according to the coupling inductance, and the basic structure of a 鈥渋njection voltage source鈥，
本文编号：2352276
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