高增益非隔離型Boost變換器拓撲及其衍生方法研究
發(fā)布時間：2018-11-23 17:44
【摘要】：近年來,隨著全球變暖和一次性能源的逐漸枯竭,太陽能、風能和燃料電池等綠色可再生能源的開發(fā)和利用在世界范圍內(nèi)備受矚目。然而,光伏電池和燃料電池等可再生能源的電力輸出通常是在較寬范圍內(nèi)變化的低直流電壓,因此需要具有高電壓增益的直流變換器將它們提升到較高的直流電壓以滿足并網(wǎng)發(fā)電或負載需求。另外,高增益直流變換器在HID、通信電源、電動汽車、醫(yī)療設(shè)備等工業(yè)領(lǐng)域具有廣泛的應(yīng)用價值。本文提出并研究了一系列高電壓增益直流-直流變換器,探索了電路的構(gòu)成機理及其衍生方法。全文主要內(nèi)容如下:本文首先分析了傳統(tǒng)Boost和抽頭/耦合電感Boost變換器(TI-Boost)內(nèi)在的結(jié)構(gòu)特點,研究了TI-Boost的升壓機理,在此基礎(chǔ)上提出了復(fù)合抽頭/耦合電感單元電路結(jié)構(gòu)。該單元結(jié)構(gòu)集成了多重功能:提高電壓增益;鉗位開關(guān)管的關(guān)斷電壓,降低功率器件的電壓應(yīng)力;可回收利用耦合電感的漏感能量等。進一步構(gòu)造了復(fù)合開關(guān)抽頭/耦合電感Boost(CSTI-Boost)和復(fù)合電源抽頭/耦合電感Boost(CVTI-Boost)兩種高電壓增益直流變換器。在不需極限占空比的情況下,兩種變換器均能實現(xiàn)高增益、高效率直流電能變換。論文還提出并研究了一種平方型復(fù)合開關(guān)抽頭/耦合電感Boost變換器(Q-CSTI-Boost),該變換器可以實現(xiàn)更高的電壓增益且具有傳統(tǒng)Boost輸入電流連續(xù)的優(yōu)點。論文深入分析和總結(jié)了基于交流變壓器和二極管-電容預(yù)儲能升壓單元的倍壓整流電路(DCC-TR)工作機理,通過分析該結(jié)構(gòu)的共性,提煉了可實現(xiàn)升壓功能的三類二極管-電容升壓單元(DCC)結(jié)構(gòu)。通過分解基本Boost變換器拓撲,提出了融合二極管-電容升壓單元的高增益Boost變換器(DCC-Boost)拓撲的構(gòu)造方法。進一步衍生了一系列基于二極管-電容升壓單元的單開關(guān)Boost變換器,推衍了融合DCC單元的輸入端交錯并聯(lián)的兩開關(guān)高增益Boost變換器(IP-DCC-Boost),及輸入、輸出均交錯串聯(lián)的Boost變換器(ISOS-DCC-Boost)拓撲結(jié)構(gòu)。對典型IP-DCC-Boost拓撲進行了仿真和實驗驗證,證明了理論分析的正確性。論文借助模塊組合的思想,提出了一種輸入并聯(lián)輸出串聯(lián)的高增益Boost變換器(IPOS Boost-Boost),分析了該變換器的工作原理及特性。通過交錯控制,IPOS Boost-Boost的兩個電感電流在輸入端交錯并聯(lián),減小了輸入電流紋波,輸出端的兩個電容交錯串聯(lián)充放電,既提高了變換器的電壓增益,又能將開關(guān)管的電壓應(yīng)力降低一半,有助于提高變換器效率。論文還提出了輸入并聯(lián)輸出串聯(lián)的優(yōu)化組合式高增益Boost-Sepic變換器(IPOS Boost-Sepic),并引入耦合電感進一步推衍出一系列高增益耦合電感IPOS CI-Boost-Sepic拓撲。在此基礎(chǔ)上又將兩個開關(guān)管合二為一,演繹出一系列輸入端共享、輸出端串聯(lián)的單開關(guān)高增益ICOS CI-Boost-Sepic變換器拓撲。論文對其中的典型拓撲工作原理及特性進行了理論分析及仿真實驗驗證,研究結(jié)果表明該類變換器不但具有較高的電壓增益,而且開關(guān)管的電壓應(yīng)力低,同時還具有輸入電流連續(xù)的優(yōu)點。為了衍生基于雙耦合電感的輸入端交錯并聯(lián)三態(tài)開關(guān)高增益Boost變換器(TSSC-DCI-Boost),根據(jù)耦合電感能夠提高電壓增益的機理,歸納和總結(jié)了利用雙耦合電感形成“注入電壓源”升壓單元的基本結(jié)構(gòu),分析了應(yīng)用雙耦合電感實現(xiàn)高增益TSSC-DCI-Boost需要遵循的基本約束條件。提出了在三態(tài)開關(guān)Boost變換器不同位置插入基于雙耦合電感的“注入電壓源”單元生成新型拓撲的方法。基于此方法分別構(gòu)造了高端疊加型、低端疊加型、混合疊加型、IVPS串聯(lián)增強型和IVS串聯(lián)增強型等5類非隔離型TSSC-DCI-Boost變換器拓撲。論文的第六章針對輸入電流紋波會對前級變換器或供電電源產(chǎn)生電磁干擾(EMI),甚至影響前級電源的發(fā)電效率或使用壽命的問題,提出一類基于耦合電感且具有低輸入電流紋波的單相高增益Boost變換器(RR-CI-Boost)。該類變換器既可以在合適占空比條件下,通過調(diào)整耦合電感的匝比進一步提高其電壓增益,又能降低開關(guān)管的電壓應(yīng)力,同時可近似實現(xiàn)零輸入電流紋波,有效抑制了電路對輸入電源的電磁干擾。
[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，
本文編號：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，
本文編號：2352276
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