本文選題：開關變換器　切入點：脈沖跨周期調(diào)制　出處：《物理學報》2014年19期 　論文類型：期刊論文

【摘要】：揭示了脈沖跨周期調(diào)制(pulse skipped modulation,PSM)電感電流連續(xù)導電模式(continuous conduction mode,CCM)Buck變換器中存在的低頻波動現(xiàn)象,分析了PSM調(diào)制CCM Buck變換器的能量轉(zhuǎn)換過程,闡述了低頻波動的產(chǎn)生機理,給出了低頻波動的判斷條件.建立了PSM調(diào)制CCM Buck變換器的同步開關映射模型,基于該模型給出了電感電流與輸出電壓隨輸出電容等效串聯(lián)電阻(equivalent series resistance,ESR)變化的分岔圖,分析了ESR對低頻波動的影響.為消除PSM調(diào)制CCM Buck中存在的低頻波動,提出了電容電流脈沖跨周期調(diào)制(capacitor current pulse skipped modulation,CC-PSM)方法.研究結果表明:在ESR較小時,CC-PSM調(diào)制CCM Buck變換器消除了PSM調(diào)制CCM Buck變換器存在的低頻波動.仿真與實驗結果驗證了理論分析的正確性.
[Abstract]:In this paper, the phenomenon of low frequency fluctuation in the continuous conducting mode of inductance current of pulse skipped modulationn (PSM) is revealed, the energy conversion process of PSM modulated CCM Buck converter is analyzed, and the mechanism of low frequency fluctuation is expounded. A synchronous switching mapping model of PSM modulated CCM Buck converter is established. Based on the model, the bifurcation diagram of the variation of inductance current and output voltage with the equivalent series resistance of output capacitance is given. The influence of ESR on low frequency fluctuation is analyzed. In order to eliminate the low frequency fluctuation in PSM modulated CCM Buck, A novel CC-PSM method for capacitors current pulse skipped modulationCC-PSM is proposed. The results show that the CC-PSM modulated CCM Buck converter can eliminate the low frequency fluctuation of PSM modulated CCM Buck converters when ESR is small. The simulation and experimental results show that the CC-PSM modulation CCM Buck converters can eliminate the low frequency fluctuations of PSM modulated CCM Buck converters. The correctness of the theoretical analysis is given.
【作者單位】： 磁浮技術與磁浮列車教育部重點實驗室 西南交通大學電氣工程學院;
【基金】：國家自然科學基金(批準號:51177140,61371033) 四川省青年科技基金(2013JQ0033) 中央高校基本科研業(yè)務費專項資金(批準號:2682013ZT20)資助的課題~~
【分類號】：TM46

【參考文獻】

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本文編號：1565516