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Modeling of electronic characteristics of power transistors and photoelectric converters in linearly-hyperbolic approximation


Author: Penin Alexandru
Degree:doctor of engineering
Speciality: 05.27.01 - Solid State Electronics, Microelectronics and Nanoelectronics
Year:2011
Scientific adviser: Anatolie Sidorenko
doctor habilitat, professor, Institute of the Electronic Engineering and Nanotechnologies
Institution: Institute of the Electronic Engineering and Nanotechnologies
Scientific council: DH 24-05.27.01
Institute of the Electronic Engineering and Nanotechnologies

Status

The thesis was presented on the 4 February, 2011
Approved by NCAA on the 31 March, 2011

Abstract

Adobe PDF document0.38 Mb / in romanian
Adobe PDF document0.34 Mb / in romanian

Keywords

solar cell, transistor, I-V characteristic, approximation, regime calculation, projective geometry, maximum power regime

Summary

Dissertation contents: introduction, five chapters, general conclusions and recommendations, bibliography - 101 references, 170 pages of the main part, 5 tables and 85 figures.

Number of publications: the obtained results are published in 18 scientific papers and 2 patents.

Field of research: power electronics.

The aim of the work: research and elaboration of convenient approximation of I-V characteristics of transistors, solar cells and of a method of an estimation of efficiency of their regimes used for elaboration of power electronics devices.

The research objectives: to validate the definition of a deviation and comparison of efficiency of modes for active two-poles with linear I-V characteristics ; for active two-poles with nonlinear I-V characteristics on an example offered quasi resonant voltage converters; to develop similarity the I-V characteristics of semi-conductor devices and the offered quasi resonant voltage converter for the uniform description and calculation of power supply systems; to develop the base approach giving a wide class of dependences convenient for engineering practice for the description of the I-V characteristics of various semi-conductor devices, to develop the approximation models of the I-V characteristics of various transistors; to apply the received results to an estimation of efficiency of SC regimes.

The scientific originality of the research consists in: application of methods of projective geometry to the analysis of electric circuits regimes; a substantiation of model of the equivalent generator of the quasi resonant voltage converter as active two-pole with current selfrestriction; the base approach for obtaining a wide class of expressions for representation of various characteristics on a basis I-V characteristics an active two-pole with current selfrestriction; application and development of similarity of characteristics of the quasi resonant voltage converter and such semi-conductor devices, as transistors and SC.

The theoretic and practical value of the research consists in: application of new mathematical apparatus in the theory of electric circuits, development of models of active twopoles, classification of typical I-V characteristics and characteristic regimes; uniform and validated description of characteristics and efficiency of regimes of voltage converters, transistors and SC; simple calculation procedures (direct analytical calculation) of voltage converters regimes, transistors and SC; techniques of an estimation of efficiency of regimes in the form of a deviation from a mode of maximum power of SC, the voltage converter; possible application of simple microcontrollers for the organization of a direct digital control of the power supply systems.