Nonlinear dynamic behavior analysis of a DC/DC converter with an ultra-high frequency Z-source converter

作者：Li, Shan; Cui, Sen; Chen, Yan^*; Zheng, Yong; Si, Wenxu

来源：Journal of Vibroengineering, 2016, 18(8): 5506-5520.

DOI：10.21595/jve.2016.17620

• ultra-high frequency Z-source converter
• discrete iterative mapping
• bifurcation
• chaos
• stability

Z-source converters have been used in new energy sources because of their advantages. These converters have attracted considerable attention under high-frequency conditions given their high power density and high conversion efficiency. However, the stability of a system of ultra-high frequency Z-source converters are likely to be affected because of the inappropriate selection of parameters or the interference of weak signals in the process of the system. These factors will render such converters unable to work properly. The chaotic bifurcation behavior of Z-source converters based on peak current control mode is analyzed in this study. A precise discrete iterative mapping model for such converters is established, and the regional stability of a system is determined based on the characteristic value of changes in the Jacobian matrix. Finally, the bifurcation and chaos phenomena in a high-frequency Z-source converter and the accuracy of the aforementioned analysis are verified via experiments. The conclusion drawn from this study does not only can provide a reference for the stable operation of ultra-high frequency Z-source converters, but also presents a theoretical basis for optimizing system parameters and improving control performance.

• 出版日期2016-12
• 单位重庆理工大学