【摘要】：電容電流反饋控制是一種新穎的控制技術(shù),尚未有文獻(xiàn)開(kāi)展電容電流模式開(kāi)關(guān)功率變換器的開(kāi)環(huán)控制特性動(dòng)力學(xué)研究。通過(guò)對(duì)三種開(kāi)關(guān)狀態(tài)的描述和不同開(kāi)關(guān)狀態(tài)內(nèi)的時(shí)域求解,建立了電容電流模式Buck變換器的具有兩條切換邊界的二維精確離散時(shí)間模型。利用分岔圖和最大Lyapunov指數(shù)譜等分析方法,揭示了負(fù)載電阻變化時(shí)電容電流模式Buck變換器的開(kāi)環(huán)動(dòng)力學(xué)行為。結(jié)果說(shuō)明:在不同的負(fù)載電阻下,該變換器運(yùn)行在正常的周期振蕩、非正常的次諧波振蕩即混沌等狀態(tài),尤其在部分負(fù)載電阻時(shí),電容電流模式控制器失控,輸出電壓不能正常調(diào)節(jié)。此外,建立了PSIM電路仿真模型,并研制了相應(yīng)的硬件電路。仿真和實(shí)驗(yàn)捕捉的時(shí)域波形和相軌圖有效地驗(yàn)證了理論分析的正確性。
[Abstract]:Capacitive current feedback control is a novel control technology, but there is no literature on the open-loop control dynamics of capacitive current-mode switching power converter. Based on the description of three switching states and the time-domain solution in different switching states, a two-dimensional precise discrete-time model with two switching boundaries for capacitive current-mode Buck converters is established. The open-loop dynamic behavior of capacitive current-mode Buck converter is revealed by means of bifurcation diagram and maximum Lyapunov exponent spectrum. The results show that under different load resistors, the converter operates in normal periodic oscillation, abnormal sub-harmonic oscillation is chaos, especially in partial load resistance, capacitive current-mode controller is out of control. The output voltage cannot be adjusted properly. In addition, the simulation model of PSIM circuit is established, and the corresponding hardware circuit is developed. The time domain waveform and the phase track diagram captured by simulation and experiment verify the correctness of the theoretical analysis.
【作者單位】： 常州大學(xué)信息科學(xué)與工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(51607013) 常州市基礎(chǔ)研究計(jì)劃(自然科學(xué)基金)(CJ20159026)資助
【分類號(hào)】：TM46

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