Achievement Of Zvt And Computation Of Its Time Of Occurrence For Power Converters

Authors

  • Vinícius Foletto Montagner Federal University of Santa Maria, GEPOC, Santa Maria, RS, Brazil.
  • Hélio Leães Hey Federal University of Santa Maria, GEPOC, Santa Maria, RS, Brazil.
  • Mário Lúcio da Silva Martins Federal University of Technology – Paraná, UTFPR, Campus Pato Branco, PR, Brazil.
  • Jumar Luís Russi Federal University of Pampa - UNIPAMPA, Campus Alegrete, RS, Brazil.

DOI:

https://doi.org/10.18618/REP.2010.3.193202

Keywords:

Design Guidelines, Mathematical Optimization, soft switching, ZVT

Abstract

This paper provides a mathematical expression to determine the occurrence of soft-switching for a general topology of ZVT converters with auxiliary resonant voltage source. This expression is used to help the designer in choosing appropriately the values of inductance and capacitance for the auxiliary resonant branch ensuring ZVT. The main advantage of the proposed methodology is to point out suitable sets of circuit parameters without relying only on time consuming numerical simulations of the entire converter. Additionally, numerical methods to compute the time of occurrence of ZVT for these power converters are provided. The proposed methods are given by second order approximations of a nonlinear function which describes the voltage on the ZVT snubber capacitor during the zero-voltage resonant stage. The results can be seen as applications of second order Taylor series and of quadratic interpolation. However, differently of simply finding the root of a given nonlinear equation, the conditions given here provide analytical expressions to compute the time of occurrence of ZVT based on the converter parameters. Then, the proposed conditions become useful for analysis and design, allowing evaluating operation sequence, total commutation time, resistive losses and other important parameters to describe the converter performance.

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Author Biographies

Vinícius Foletto Montagner, Federal University of Santa Maria, GEPOC, Santa Maria, RS, Brazil.

was born in Faxinal do Soturno, RS, Brazil, in 1974. He received the B.S. and M.S. degrees Electrical Engineering from Federal University of Santa Maria in 1996 and 2000, respectively. He received the PhD and post-doctoral degrees in Electrical Engineering from University of Campinas in 2005 and 2006, respectively. He also spent a year in Berkeley University, CA, in his doctoral internship. Currently, he is a professor at Electric Power Processing Department in Federal University of Santa Maria. His research interests include control theory and its applications.

Hélio Leães Hey, Federal University of Santa Maria, GEPOC, Santa Maria, RS, Brazil.

was born in Santa Maria, Brazil, in 1961. He received the B.S. degree from the Catholic University of Pelotas, Pelotas, Brazil, in 1985, and the M.S. and Ph.D. degrees from the Federal University of Santa Catarina, Florianópolis, Brazil, in 1987 and 1991, respectively. From 1989 to 1993, he was with the Federal University of Uberlândia, Uberlândia, Brazil. Since 1994, he has been with the Federal University of Santa Maria, where he is currently a Professor. He is also with the Power Electronics and Control Research Group (GEPOC). From 1995 to 1999, he was Editor of the Brazilian Power Electronics Journal. From 2005 to 2006, he was with the Electrical and Electronic Engineering Department, University of Oviedo, Oviedo, Spain, where he performed his postdoctoral research on power-factor-correction and soft-switching techniques. He has authored more than 140 papers published in power electronics journals and conference proceedings. His research interests include softswitching techniques, high-frequency power conversion, powerfactor-correction techniques, and renewable-energy applications.Group (GEPOC). From 1995 to 1999, he was Editor of the Brazilian Power Electronics Journal. From 2005 to 2006, he was with the Electrical and Electronic Engineering Department, University of Oviedo, Oviedo, Spain, where he performed his postdoctoral research on power-factor-correction and soft-switching techniques. He has authored more than 140 papers published in power electronics journals and conference proceedings. His research interests include soft-switching techniques, highfrequency power conversion, power factor-correction techniques, and renewable-energy applications.

Mário Lúcio da Silva Martins, Federal University of Technology – Paraná, UTFPR, Campus Pato Branco, PR, Brazil.

was born in Palmeira das Missões, RS, Brasil, in 1976. He received the B.S., M.S. and Ph.D. degrees in electrical engineering from the Federal University of Santa Maria, Santa Maria, Brazil, in 2000, 2002, and 2008, respectively. Since 2006, he has been with the Federal University of Technology – Paraná (UTFPR), Pato Branco, Brazil, where he is currently a Professor in Graduation and Pos-Graduation courses of Electrical Engineering, lecturing Electronics, Power Electronics and Circuit Analysis. His research interests include highperformance power converters, renewable-energy applications and variable speed drives. Dr. Martins was the recipient of the Second Prize Paper Award from the Industrial Power Converter Committee of the IEEE Industry Applications Society (IAS) at the 2005 IAS Annual Meeting and has authored 36 papers in power electronics journals and conference proceedings. Dr. Martins is a member of IEEE Power Electronics, Industrial Electronics and Industry Application Societies, and SOBRAEP.

Jumar Luís Russi, Federal University of Pampa - UNIPAMPA, Campus Alegrete, RS, Brazil.

was born in Passo Fundo, Brazil, in 1977. He received the B.S., M.S. and Ph.D. degrees from the Federal University of Santa Maria, Santa Maria, Brazil, in 2000, 2003 and 2007, respectively, in electrical engineering. Since 2007 he is a professor at the Federal University of Pampa in Alegrete-RS. His research interests include switched-mode power supplies, uninterruptible power supplies and high performance power converters.

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Published

2010-08-31

How to Cite

[1]
V. Foletto Montagner, H. Leães Hey, M. L. da Silva Martins, and J. Luís Russi, “Achievement Of Zvt And Computation Of Its Time Of Occurrence For Power Converters”, Eletrônica de Potência, vol. 15, no. 3, pp. 193–202, Aug. 2010.

Issue

Vol. 15 No. 3 (2010)

Section

Original Papers

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Copyright (c) 2010 Revista Eletrônica de Potência

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This work is licensed under a Creative Commons Attribution 4.0 International License.

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