scholarly journals SYMBOLIC MODELS OF THE PULSE ENERGY CONVERSION SYSTEMS DYNAMICS

2014 ◽  
pp. 73-78
Author(s):  
S. L. Koschinsky ◽  
A. P. Sholonik ◽  
P. S. Ustinov
Keyword(s):  
Energy Conversion ◽  
Pulse Energy ◽  
Buck Converter ◽  
Systems Dynamics ◽  
Voltage Mode ◽  
Energy Conversion Systems

The derivation of developed symbolic models of dynamics of voltage mode controlled buck converter operated both in discontinuous and continuous conducting modes is given.

scholarly journals Bifurcation Approach to Condition Monitoring: Application to Pulse Energy Conversion Systems

OPSEARCH ◽  
2002 ◽  
Vol 39 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Yuri V. Kolokolov ◽  
Stanislav L. Koschinsky ◽  
Kondo H. Adjallah
Keyword(s):  
Energy Conversion ◽  
Condition Monitoring ◽  
Pulse Energy ◽  
Energy Conversion Systems ◽  
Monitoring Application

A Practice-Oriented Bifurcation Analysis for Pulse Energy Converters. Part 3: Transients

2018 ◽  
Vol 28 (06) ◽  
pp. 1850079
Author(s):  
Yury Kolokolov ◽  
Anna Monovskaya
Keyword(s):  
Energy Conversion ◽  
Bifurcation Analysis ◽  
Pulse Energy ◽  
Operating Regime ◽  
Bifurcation Diagrams ◽  
Operating Characteristics ◽  
Operating Process ◽  
Energy Conversion Systems ◽  
Basic Characteristics ◽  
And Performance

The paper continues the discussion on the bifurcation analysis conceptions for applications in practice-oriented solutions for pulse energy conversion systems (PEC-systems). This viewpoint means an attempt to resolve so-called conflict-of-units between the notions used to describe natural evolution (i.e. evolution of the operating process towards nonoperating processes and vice versa) and the notions used to describe a desirable artificial regime (i.e. the operating regime). In this connection, the correspondence between causes (degradation of the operating process stability) and effects (changes of the operating characteristics) is established in the following sequence: nonlinear dynamics output signal operating characteristics, where these characteristics include stability and performance. Two starting points follow from the previous parts. First, there are distinguishable thresholds of evolutional degradation, between which the operating process loses stability in a particular manner; and these particularities can be systematized by means of so-called uncertainty zones. Second, multi-D integrating translations of phase images with regular parametrical variation are combined with the corresponding boundaries of the operating stability and performance by means of the modified bifurcation diagrams. Then we focus on the basic characteristics of transients and first demonstrate and discuss some unified form of the modified bifurcation diagrams, to which a solution on the operating performance can be reduced. Namely, we show such solutions for an overshoot and a settling time in comparison with a control error. We believe that the practice-oriented bifurcation analysis could be interesting to pioneer research intended for the design of promising systems of pulse energy conversion.

A Practice-Oriented Bifurcation Analysis for Pulse Energy Converters: A Stability Margin

2017 ◽  
Vol 27 (09) ◽  
pp. 1750134 ◽  
Author(s):  
Yury Kolokolov ◽  
Anna Monovskaya
Keyword(s):  
Nonlinear Dynamics ◽  
Energy Conversion ◽  
Bifurcation Analysis ◽  
Pulse Energy ◽  
Stability Margin ◽  
Variable Structure ◽  
Operating Regime ◽  
Buck Converter ◽  
Practical Applications ◽  
Operating Process

The popularity of systems of pulse energy conversion (PEC-systems) for practical applications is due to the heightened efficiency of energy conversion processes with comparatively simple realizations. Nevertheless, a PEC-system represents a nonlinear object with a variable structure, and the bifurcation analysis remains the basic tool to describe PEC dynamics evolution. The paper is devoted to the discussion on whether the scientific viewpoint on the natural nonlinear dynamics evolution can be involved in practical applications. We focus on the problems connected with stability boundaries of an operating regime. The results of both small-signal analysis and computational bifurcation analysis are considered in the parametrical space in comparison with the results of the experimental identification of the zonal heterogeneity of the operating process. This allows to propose an adapted stability margin as a sufficiently safe distance before the point after which the operating process begins to lose the stability. Such stability margin can extend the permissible operating domain in the parametrical space at the expense of using cause-and-effect relations in the context of natural regularities of nonlinear dynamics. Reasoning and discussion are based on the experimental and computational results for a synchronous buck converter with a pulse-width modulation. The presented results can be useful, first of all, for PEC-systems with significant variation of equivalent inductance and/or capacity. We believe that the discussion supports a viewpoint by which the contemporary methods of the computational and experimental bifurcation analyses possess both analytical abilities and experimental techniques for promising solutions which could be practice-oriented for PEC-systems.

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