Large-signal stability of a boost regulator by means of linear control laws

ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465) Pub Date : 1999-07-12 DOI:10.1109/ISIE.1999.801794

R. Leyva, L. Martínez-Salamero, J. Maixe, R. Giral, F. Guinjoan

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引用次数: 1

Abstract

The problem of stabilizing a boost regulator in large-signal situations using linear control laws is investigated in this paper. The control law is derived by means of a circuit-oriented procedure. After establishing a large-signal circuit model for the boost regulator including state-feedback, conditions for passivity in the resulting two-port are studied. As a consequence, a control law is directly derived from two-port passivity conditions, this ensuring regulator global stability even if the control saturation is taken into account. Subsequently, a linear analysis is performed in order to design the desired dynamics and robust behavior of the switching regulator. The linear analysis shows that only one feedback gain is necessary, provided that the coordinates of the equilibrium point are known. The use of regulator root locus, gain margin and phase margin diagrams as a function of the feedback gain allows to choose the proper value of this gain solving a certain trade-off for good dynamic response and robust behavior. ACSL simulations verify the analytical predictions.

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利用线性控制律研究升压调节器的大信号稳定性

本文研究了在大信号情况下利用线性控制律稳定升压调节器的问题。通过面向电路的程序推导出控制律。在建立了包含状态反馈的升压调节器的大信号电路模型后，研究了其双端口无源性的条件。因此，控制律直接来源于双端口无源条件，即使考虑到控制饱和，这也确保了调节器的全局稳定性。随后，进行了线性分析，以设计所需的动力学和开关调节器的鲁棒性。线性分析表明，在已知平衡点坐标的情况下，只需要一个反馈增益。使用调节器根轨迹、增益裕度和相位裕度图作为反馈增益的函数，可以选择适当的增益值，解决了良好动态响应和鲁棒性的某种权衡。ACSL仿真验证了分析预测。

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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ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465)

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