Download Chaos Analysis and Chaotic EMI Suppression of DC-DC by Bo Zhang PDF

By Bo Zhang

Introduces chaos conception, its analytical equipment and the capacity to use chaos to the switching energy offer design

DC-DC converters are normal switching structures that have lots of nonlinear behaviors, akin to bifurcation and chaos. The nonlinear behaviors of DC-DC converters were studied seriously over the last twenty years, but researchers are nonetheless not sure of the sensible software of bifurcations and chaos in switching converters. The electromagnetic interference (EMI), which resulted from the excessive premiums of adjustments of voltage and present, has develop into a big layout criterion in DC-DC converters as a result of vast functions of assorted digital units in and lifestyle, and the query of ways to minimize the irritating, damaging EMI has attracted a lot learn curiosity. This ebook makes a speciality of the research and alertness of chaos to lessen destructive EMI of DC-DC converters.   

After a evaluation of the basics of chaos behaviors of DC-DC converters, the authors current a few contemporary findings akin to Symbolic Entropy, Complexity and Chaos aspect procedure, to investigate the characters of chaotic DC-DC converters. utilizing those tools, the statistic characters of chaotic DC-DC converters are extracted and the rules for the subsequent researches of chaotic EMI suppression are strengthened. the focal point then transfers to estimating the ability spectral density of chaotic PWM converters in the back of an advent of easy rules of spectrum research and chaotic PWM strategy. Invariant Density, and Prony and Wavelet research equipment are advised for estimating the facility spectral density of chaotic PWM converters.  ultimately, a few design-oriented purposes supply a superb instance of using chaos concept in engineering perform, and illustrate the effectiveness on suppressing EMI of the proposed chaotic PWM. 

  • Introduces chaos concept, its analytical equipment and the capacity to use chaos to the switching strength provide design
  • Approaches the topic in a scientific demeanour from examining technique, chaotic phenomenon and EMI features, analytical equipment for chaos, and utilising chaos to lessen EMI (electromagnetic interference)
  • Highlights complicated learn paintings within the fields of statistic characters of nonlinear behaviors and chaotic PWM expertise to suppress EMI of switching converters
  • Bridges the distance among numerical concept and real-world functions, allowing strength electronics designers to either research the results of chaos and leverage those results to minimize EMI

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Additional info for Chaos Analysis and Chaotic EMI Suppression of DC-DC Converters

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6 10 20 30 Code 40 50 60 Symbol series histogram of logistic map with L = 8 In order to quantify the nonlinear behavior of the dynamic system, a concept termed Shannon entropy from information theory is illustrated to measure the uncertainty of a discrete finite set, because the histogram is a graphical representation. In fact, entropy is a concept derived from thermodynamics, and was extended to the field of chaotic dynamics by Shanon and Kolmogorov in 1970s. Moreover, some generalized entropy as indices of nonlinearity of the inspection system also has a very good effect.

Second, how to characterize the irregular orbits? The period-doubling bifurcation is the most common bifurcation behavior of switching power converters. In order to demonstrate the usefulness of symbolic description, we shall study the symbolic dynamics of periodic orbits of one-dimensional mappings first. 7) One says that the mapping has reached a fixed point (namely period-1) where the line and map curve intersect. With an increasing parameter ????, the fixed point xp may move from the increasing branch to the decreasing branch.

However, converters are designed to work in these two or three topologies cyclically (CCM or DCM), and the transform from one topology to another is controlled by the external driving signal, which is a typical digital signal or discrete-valued. Therefore, DC–DC converters are definitely piecewise-smooth hybrid systems which include continuous and discrete systems synchronously. Therefore, they may have complex nonlinear behavior. M. 3 Characterization of Nonlinear Behavior It is well known that linear methods applied alone cannot give a reasonable explanation of nonlinear phenomena.

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