本文選題：二次型Boost變換器 + 臨界電感值　； 參考：《電工技術(shù)學(xué)報(bào)》2014年08期

【摘要】：根據(jù)二次型Boost變換器輸入電感和儲(chǔ)能電感的工作模式,劃分了二次型Boost變換器的工作模式區(qū)域,并分析了不同能量傳輸模式時(shí)輸出電壓的紋波特性。根據(jù)儲(chǔ)能電感電流谷值與輸出電流的關(guān)系,分析了二次型Boost變換器在開關(guān)管關(guān)斷期間的能量傳輸模式:完全電感供能模式(CISM)和不完全電感供能模式(IISM),得出了CISM與IISM的臨界電感值和臨界工作條件。當(dāng)儲(chǔ)能電感工作于連續(xù)導(dǎo)電模式(CCM)時(shí),二次型Boost變換器既可以工作于CISM,也可以工作于IISM;當(dāng)儲(chǔ)能電感工作于不連續(xù)導(dǎo)電模式(DCM)時(shí),二次型Boost變換器只能工作于IISM。對(duì)于給定輸入電感、負(fù)載、電容和開關(guān)頻率的二次型Boost變換器,當(dāng)儲(chǔ)能電感工作于CCM-CISM模式時(shí),輸出電壓紋波最小,輸出電壓紋波僅由開關(guān)管導(dǎo)通期間輸出電容電壓的下降幅度決定,與儲(chǔ)能電感無關(guān);而當(dāng)儲(chǔ)能電感工作于DCM-IISM模式時(shí),輸出電壓紋波最大,輸出電壓紋波隨著儲(chǔ)能電感的減小而增大。最后,通過試驗(yàn)裝置驗(yàn)證了理論分析的正確性。
[Abstract]:According to the operating modes of input inductors and energy storage inductors of quadratic Boost converters, the operating mode regions of quadratic Boost converters are divided, and the ripple characteristics of output voltages in different energy transmission modes are analyzed.According to the relation between the current valley value of the energy storage inductor and the output current,The energy transfer modes of the secondary Boost converter during switching off are analyzed, which are the full inductance energy supply mode and the incomplete inductance energy supply mode. The critical inductance values and critical operating conditions of CISM and IISM are obtained.When the energy storage inductor works in the continuous conduction mode, the secondary Boost converter can work both at CISM and the IISM, and when the energy storage inductor works in the discontinuous conductive mode, the secondary Boost converter can only work on the IISM.For a quadratic Boost converter with a given input inductor, load, capacitance and switching frequency, the output voltage ripple is minimum when the energy storage inductor works in CCM-CISM mode.The output voltage ripple is determined only by the drop of the output capacitor voltage during the switching on period, and has nothing to do with the energy storage inductor, but when the energy storage inductor works in DCM-IISM mode, the output voltage ripple is the largest.The output voltage ripple increases with the decrease of the energy storage inductance.Finally, the correctness of the theoretical analysis is verified by the experimental device.
【作者單位】： 西南交通大學(xué)電氣工程學(xué)院;
【基金】：國家自然科學(xué)基金(51177140,61371033) 四川省青年科技基金(2013JQ0033)資助項(xiàng)目
【分類號(hào)】：TM46

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本文編號(hào)：1741974