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Dynamic behaviors of constant on-time one-cycle controlled Boost converter

huwei9 添加于 2018/1/25 13:59:28  309次阅读 | 0次推荐 | 0个评论

In this study, the discrete-time model is used to analyse a constant on-time one-cycle controlled boost converter operating in continuous conduction mode. Then, it derives the critical boundary between continuous conduction mode and discontinuous conduction mode. In terms of Newton–Raphson methodology, the numerical solutions of fixed points are obtained. Thereafter, the stability of closed-loop boost converter is analysed based on its Jacobian matrix. It remarks that a couple of conjugate multipliers of Jacobian matrix of the system cross the unit circle gradually with constant on-time value increasing, while the step-up power stage moves from period-1 state into Neimark–Sacker bifurcation. Based on the stability analysis, an additional current loop is developed to improve the control for extending the stable region. Finally, simulation and experimental results well validate the theoretical analysis.

作 者:Hu Wei, Zhang Bo, Yang Ru, Qiu Dongyuan
期刊名称: IET Power Electronics
期卷页: 第11卷 第1期 160-167页
学科领域:工程材料 » 电气科学与工程 » 电力电子学
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原文链接:http://digital-library.theiet.org/content/journals/10.1049/iet-pel.2016.1013
DOI: 10.1049/iet-pel.2016.1013
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