本文選題：線性電子負載 + 開關型電子負載��； 參考：《哈爾濱工業(yè)大學》2015年碩士論文

【摘要】：負載作為電源測試的必需品,它的發(fā)展與應用變得日益復雜化,傳統(tǒng)的靜態(tài)負載已很難滿足測試需求。線性電子負載憑借高動態(tài)響應的優(yōu)勢,雖然得到廣泛使用,但也受到功率等級的限制,且能量消耗很大。開關型電子負載可以實現(xiàn)能量回饋,符合國家節(jié)能減排的要求,并且提升了測試負載的功率等級。本文根據(jù)線性電子負載和開關型電子負載的優(yōu)缺點,采用線性負載與開關型負載協(xié)同工作的方式,使其優(yōu)勢互補,提高電子負載的動態(tài)響應速度,并可實現(xiàn)能量回饋,提高負載效率,對輸入電流紋波進行一定程度的補償縮小。本文對功率MOSFET作為線性電子負載進行研究,分析其工作原理并設計了具有高帶寬運算放大器的驅(qū)動電路,使線性負載具有較高的動態(tài)響應。分析MOSFET等效模型及運算放大器環(huán)路穩(wěn)定性,設計線性負載的補償網(wǎng)絡,確保線性電子負載單元工作的可靠性。在此基礎上介紹多路線性負載并聯(lián)的方式,拓寬線性負載的功率等級。各并聯(lián)支路采用相互獨立的驅(qū)動電路,可近一步提高線性電子負載的動態(tài)響應速度。本文選取Switching-Boost開關型電子負載進行研究,分析其工作原理并計算拓撲參數(shù)。并基于輸入濾波器的作用,可減小輸入電流紋波。介紹變換器小信號建模分析,并對輸入電流進行閉環(huán)補償網(wǎng)絡設計,提高負載模擬精度。同時該變換器具有較寬的輸入電壓范圍,還可以實現(xiàn)能量回饋。論文介紹了線性電子負載與開關型電子負載協(xié)同工作機理,分析電流鏡采樣電路,并設計線性負載基準值給定電路。通過控制線性負載電流,在負載切換時刻將線性負載投入使用,以此提高電子負載的動態(tài)響應速度。并在電路達到穩(wěn)態(tài)時,控制線性負載電流呈三角波的形式,補償輸入電流紋波。同時設計了母線電壓采樣電路和配電開關驅(qū)動電路,使電子負載工作于安全的電壓范圍內(nèi)。
[Abstract]:As the necessity of the power test, the development and application of the load become increasingly complex, and the traditional static load has been difficult to meet the requirement of testing. The linear electronic load has the advantage of high dynamic response. Although it is widely used, it is also limited by the power level and can be consumed greatly. The switched electronic load can achieve the energy. Based on the advantages and disadvantages of linear electronic load and switch type electronic load, this paper uses linear load and switch type load to work together to make its advantages complementary, improve the dynamic response speed of electronic negative load, and achieve energy feedback and increase. The load efficiency reduces the input current ripple to a certain extent. This paper studies the power MOSFET as a linear electronic load, analyzes its working principle and designs a driving circuit with a high bandwidth operational amplifier to make the linear load have a high dynamic response. The MOSFET equivalent model and the loop stability of the operational amplifier are analyzed. Qualitatively, the compensation network of linear load is designed to ensure the reliability of linear electronic load unit work. On this basis, the mode of multichannel linear load parallel is introduced and the power level of linear load is widened. The dynamic response speed of linear electronic load can be improved by the independent driving circuit of each parallel branch. This paper selects S in this paper. The witching-Boost switch type electronic load is studied, its working principle is analyzed and the topology parameters are calculated. Based on the function of the input filter, the input current ripple can be reduced. The small signal modeling analysis of the converter is introduced, and the closed loop compensation network for the input current is designed to improve the precision of the load simulation. At the same time, the converter is more wide. The input voltage range and the energy feedback can be realized. The paper introduces the cooperative working mechanism of the linear electronic load and the switch type electronic load, analyzes the current mirror sampling circuit, and designs the given circuit of the linear load reference value. By controlling the linear load current, the linear load is put into use at the load switching time to improve the electronic load. When the circuit reaches steady state, the control linear load current is in the form of triangular wave, and the input current ripple is compensated. At the same time, the bus voltage sampling circuit and the distribution switch drive circuit are designed to make the electronic load work in the safe voltage range.

【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM46

【參考文獻】

相關期刊論文 前1條

1 薛明，王影純;大負載電源產(chǎn)品出廠前試驗節(jié)能裝置[J];電聲技術;1996年06期

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本文編號：1876686