Analysis and design of a load-independent class-E LCL resonant converter

Lucas S. Mendonça; Valmir  de Oliveira; Guilherme S. Simeão; Fábio E. Bisogno

doi:10.18618/REP.e202610

Authors

Lucas S. Mendonça Federal University of Technology - Paraná https://orcid.org/0000-0002-4927-6206
Valmir de Oliveira Federal University of Technology - Paraná https://orcid.org/0000-0001-5731-6127
Guilherme S. Simeão Federal University of Technology - Paraná https://orcid.org/0009-0006-2777-9140
Fábio E. Bisogno Hochschule Koblenz https://orcid.org/0000-0002-2006-3899

DOI:

https://doi.org/10.18618/REP.e202610

Keywords:

class-E amplifiers, load-independence, resonant converters

Abstract

This work brings in a load-independent Class-E LCL resonant converter. The intertwined soft-switching and load-independent functions in resonant topologies require high mathematical effort and leads to trade-off designing characteristics related to the operating frequency, output power and load range. Therefore, this paper shows the exact analysis for the Class-E LCL converter by axiomatically dealing with the second, third and fourth-order polynomials. In addition, a design method is proposed based on the implicit equations while considering the soft-switching and load-independence features. The measured built prototype operates at 1.2 MHz, which outperforms most of the state-of-the-art compared converters by x 1.2, while maintaining comparable output power and efficiency (92 %).

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Author Biographies

Lucas S. Mendonça, Federal University of Technology - Paraná

is a control and automation engineer (2015), master (2017) and doctor in Electrical Engineering (2021) with the Federal University of Santa Maria. He is currently a professor at Federal University of Technology-Paraná. His areas of interest are: resonant and pwm dc-dc converters, ac-dc resonant rectifiers and dc-ac resonant inverters.

Valmir de Oliveira, Federal University of Technology - Paraná

is an electrical industrial engineer (1993), master (2005) and doctor (2012) in Electrical Engineering and Informatics with the Federal University of Technology-Paraná. His areas of interest are: power electronics, microelectronics and photonics

Guilherme S. Simeão, Federal University of Technology - Paraná

is an undergraduted student in the Mechatronics Engineering Course at Federal University of Technology-Paraná. His areas of interest are: dc-ac inverters and ac-dc rectifiers for wireless power transfer and electric mobility applications.

Fábio E. Bisogno, Hochschule Koblenz

is an electrical engineer (1999), master (2001) in Electrical Engineering with the Federal University of Santa Maria, and doctor in Electrical Engineering with the Technische Universität Chemnitz (2006). He is currently a professor at Hochschule Koblenz. His areas of interest are: resonant converters, self-oscillating electronic converters and artificial lighting.

References

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