Indirect Output Voltage Control in Negative Output Elementary Super Lift Luo Converter Using PIC plus FLC in Discontinuous Conduction Mode

电路与系统(英文) Pub Date : 2016-09-06 DOI:10.4236/CS.2016.711310

S. Muthukaruppasamy, A. Abudhahir

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引用次数: 3

Abstract

In this paper, the design of a proportional integral controller (PIC) plus fuzzy logic controller (FLC) for the negative output elementary super lift Luo converter (NOESLLC) operated in discontinuous conduction mode (DCM) is presented. In spite of the many benefits viz. the high voltage transfer gain, the high efficiency, and the reduced inductor current and the capacitor voltage ripples, it natured with non-minimum phase. This characteristic makes the control of NOESLLC cumbersome. Any attempt of direct controlling the output voltage may erupt to instability. To overcome this problem, indirect regulation of the output voltage based on the two-loop controller is devised. The savvy in the inductor current control improves the dynamic response of the output voltage. The FLC is designed for the outer (voltage) loop while the inner (current) loop is controlled by the PIC. For the developed ?19.6 V NOESLLC, the dynamic performances for different perturbations (line, load and component variations) are obtained for PIC plus FLC and compared with PIC plus PIC. The study of two cases is performed at various operating regions by developing the MATLAB/Simulink model.

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断续导通模式下PIC + FLC负输出初等超升力罗变换器的间接输出电压控制

针对工作在不连续导通模式(DCM)下的负输出初等超升力罗变换器(NOESLLC)，设计了比例积分控制器(PIC)加模糊控制器(FLC)。尽管它具有高电压转移增益、高效率、减小电感电流和电容器电压波动等优点，但它具有非最小相位的特性。这个特性使得NOESLLC的控制很麻烦。任何直接控制输出电压的企图都可能导致不稳定。为了克服这一问题，设计了基于双环控制器的输出电压间接调节。电感电流控制的巧妙改进了输出电压的动态响应。FLC设计用于外部(电压)环，而内部(电流)环由PIC控制。对于开发的19.6 V NOESLLC，获得了PIC + FLC在不同扰动(线路、负载和分量变化)下的动态性能，并与PIC + PIC进行了比较。通过开发MATLAB/Simulink模型，在不同的操作区域对两个案例进行了研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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电路与系统(英文)

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