当前位置: X-MOL 学术Int. J. Circ. Theory Appl. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Modeling and stability analysis of dynamic oscillation behaviors in double‐input Buck/Buck‐Boost DC‐DC converters using frequency selective approach
International Journal of Circuit Theory and Applications ( IF 2.3 ) Pub Date : 2020-09-22 , DOI: 10.1002/cta.2873
Hao Zhang 1 , Wei Liu 1 , Honghui Ding 1, 2 , Yongpeng Meng 1 , Donggang Cui 1
Affiliation  

Different from single‐input single‐output converters, stronger nonlinearity and coupling effect become ones of the most salient characteristics in the multiport DC‐DC converters (MPCs). Therefore, the MPCs can exhibit a great variety of more complex oscillation behaviors in different frequency regimes and seriously endanger system stability. In this paper, a frequency‐selective averaging model is proposed to investigate the low‐ and high‐frequency stability problem in the double‐input Buck/Buck‐Boost DC‐DC converter. At first, to characterize both low‐ and high‐frequency regime dynamics in one unified frame, the short‐time Fourier transform will be applied to obtain a frequency‐selective averaging model. Based on the proposed model, theoretical analysis is performed to identify subharmonic oscillation and low‐frequency oscillation by the movement of the eigenvalue loci. In particular, the underlying mechanism of the subharmonic oscillation and low‐frequency oscillation is uncovered deeply by participation analysis. It shows that period‐doubling bifurcation and Hopf bifurcation result in the subharmonic oscillation and low‐frequency oscillation, respectively. Moreover, some stability boundaries show the influence of varying parameters on system stability thoroughly, which is important to guide system stability enhancement. Finally, some circuit experiments are presented to verify the above theoretical and numerical results.

中文翻译:

双频率降压/降压-升压DC-DC转换器中动态振荡行为的建模和稳定性分析

与单输入单输出转换器不同,更强的非线性和耦合效应成为多端口DC-DC转换器(MPC)的最显着特征之一。因此,MPC在不同的频率范围内会表现出多种更复杂的振荡行为,并严重危害系统稳定性。本文提出了一种频率选择平均模型,以研究双输入Buck / Buck-Buck-Boost DC-DC转换器的低频和高频稳定性问题。首先,为了在一个统一的框架中同时表征低频和高频状态动力学,将使用短时傅立叶变换来获得频率选择平均模型。根据建议的模型,进行了理论分析,以通过特征值轨迹的移动来识别次谐波振荡和低频振荡。特别地,参与分析深刻地揭示了亚谐波振荡和低频振荡的潜在机理。结果表明,倍频分叉和Hopf分叉分别导致次谐波振荡和低频振荡。而且,一些稳定性边界充分显示了变化的参数对系统稳定性的影响,这对于指导系统稳定性的提高很重要。最后,通过一些电路实验验证了上述理论和数值结果。参与分析深刻地揭示了亚谐波振荡和低频振荡的潜在机理。结果表明,倍频分叉和Hopf分叉分别导致次谐波振荡和低频振荡。而且,一些稳定性边界充分显示了变化的参数对系统稳定性的影响,这对于指导系统稳定性的提高很重要。最后,通过一些电路实验验证了上述理论和数值结果。参与分析深刻地揭示了亚谐波振荡和低频振荡的潜在机理。结果表明,倍频分叉和Hopf分叉分别导致次谐波振荡和低频振荡。而且,一些稳定性边界充分显示了变化的参数对系统稳定性的影响,这对于指导系统稳定性的提高很重要。最后,通过一些电路实验验证了上述理论和数值结果。这对增强系统稳定性至关重要。最后,通过一些电路实验验证了上述理论和数值结果。这对增强系统稳定性至关重要。最后,通过一些电路实验验证了上述理论和数值结果。
更新日期:2020-09-22
down
wechat
bug