Unified Discrete-Mapping Model and Dynamical Behavior Analysis of Current-Mode Controlled Single-Inductor Dual-Output DC–DC Converter

2019 ◽  
Vol 7 (1) ◽  
pp. 366-380 ◽  
Author(s):  
Shuhan Zhou ◽  
Guohua Zhou ◽  
Shaohuan Zeng ◽  
Shungang Xu ◽  
Hongbo Ma
Keyword(s):  
Behavior Analysis ◽  
Dynamical Behavior ◽  
Current Mode ◽  
Mapping Model

Nonlinear Behavior in Current Mode Research of Z-Source DC/DC Converter

2010 ◽  
Vol 44-47 ◽  
pp. 1677-1681
Author(s):  
Ke Guo ◽  
Yan Chen ◽  
Lin Zhou ◽  
Lu Dai
Keyword(s):  
Theoretical Basis ◽  
Nonlinear Behavior ◽  
Current Mode ◽  
Power Converter ◽  
Current Control ◽  
Nonlinear Characteristic ◽  
Characteristic Analysis ◽  
Mapping Model ◽  
And Control ◽  
Conduction Mode

Z-source converter as a kind of power converter will be responsible for the energy transmission, the paper focuses on the nonlinear characteristic analysis of Z-source DC/DC converter, in the continuous conduction mode (CCM), take Z-source converter with peak current control as the research object, establish stroboscopic mapping model for analyzing its nonlinear characteristic. the experiment result proves that Z-source converter stroboscopic mapping model is correct for analyzing its nonlinear behavior, which provides a theoretical basis for optimal design and control.

Nonlinear Behavior Analysis of a Rotor Supported on Fluid-Film Bearings

2005 ◽  
Vol 128 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Guangyan Shen ◽  
Zhonghui Xiao ◽  
Wen Zhang ◽  
Tiesheng Zheng
Keyword(s):  
Behavior Analysis ◽  
Dynamical Behavior ◽  
Nonlinear Behavior ◽  
Fluid Film ◽  
Diagnostic Tools ◽  
Nonlinear Phenomena ◽  
Frequency Spectra ◽  
Nonlinear Dynamical ◽  
Synchronous Motion ◽  
Period Motion

A fast and accurate model to calculate the fluid-film forces of a fluid-film bearing with the Reynolds boundary condition is presented in the paper by using the free boundary theory and the variational method. The model is applied to the nonlinear dynamical behavior analysis of a rigid rotor in the elliptical bearing support. Both balanced and unbalanced rotors are taken into consideration. Numerical simulations show that the balanced rotor undergoes a supercritical Hopf bifurcation as the rotor spin speed increases. The investigation of the unbalanced rotor indicates that the motion can be a synchronous motion, subharmonic motion, quasi-period motion, or chaotic motion at different rotor spin speeds. These nonlinear phenomena are investigated in detail. Poincaré maps, bifurcation diagram and frequency spectra are utilized as diagnostic tools.

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