Evgeniy Popov, Nikolay Hinov

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This article formulates the new unified interpretation of the analysis of electromagnetic processes in the autonomous (usually resonant) inverters with power circuits having a serial RLC configuration either with or without free wheeling diodes. The investigation starts with clarifying the parameters of the inverter circuit by bringing the fourth order power network into such of a second order in a normalized form. On this basis the novel compendious relationships between the most important internal inverter parameters are given. A MATLAB program calculates and displays the frequency characteristics of both types of inverters and simulates their steady state. The results from characteristics and simulation confirm each other in many possible ways. They were proved also experimentally. The whole processed information helps for good understanding and for organizing intelligent design, measurement and control of the inverters for technological applications (induction heating).

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E. Popov, Analysis, Modeling and Design of Converter Units (Computer – Aided Design of Power Electronic Circuits), Technical University Printing House, Sofia, 2005 (In Bulg.), Chapters 2-3, pp. 59–80.

N.L.Hinov,Power converters of electrical energy with industrial application, Ph.D. Thesis, Technical University, Sofia, 1998, (In Bulg.), Chapters 3-4, pp. 45–88.

M. K. Kazimierczuk and D. Czarkowski, Resonant Power Converters, IEEE Press and John Wiley & Sons , New York, NY 2nd Edition, pp. 1-595, ISBN 978-0-470-90538-8, 2011.

N. Mohan, Undeland, Tore M.; Robbins, William P., Power Electronics - Converters, Applications, and Design (3rd Edition), © 2003 John Wiley & Sons.

G. Zinoviev, Fundamentals of Power Electronics - part II, Novosibirsk State University, Novosibirsk, Russia, 2004, (in Russian).

M. H. Rashid, Power Electronics: Circuits, Devices and Applications, Pearson/Prentice Hall, 2003.

B. L. Dokić, B. Blanuša, Power Electronics Converters and Regulators - Third Edition, © Springer International Publishing, Switzerland 2015, ISBN 978-3-319-09401-4.

E. I. Popov, “Direct determination of the steady-state mode in autonomous inverters”, Scientific Journal “Electrical Engineering and Electronics E+E”, vol. 11-12, 2004, Sofia, Bulgaria, (In Bulg.).

M. A. Trzynadlowski, Introduction to Modern Power Electronics, Wiley, New York, 2010.

John G. Kassakian, Martin F. Schlecht, George C. Verghese, Principles of Power Electronics, Addison-Wesley, Reading 1992.

E. I. Berkovitch, G. V. Ivenskiy, Yu. S. Yoffe, A. T. Matchak, V. V. Morgun, Higher frequency thyristor converters for electro technological units, St. Petersborough, Energoatomizdat, (1973), 1983., (In Russian).


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