Sine-Wave Amplitude-Modulation Concept for Linear Behavior of Phase-Modulated Resonant Converters

Ferreira, Carlos; Borges, Beatriz

doi:10.1109/tie.2012.2228137

Cited by 9 publications

(1 citation statement)

References 23 publications

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“…H IGH efficiency and power density being the key features, resonant converters (RCs) have been widely used in electronic ballasts [1]- [2], domestic and industrial induction heating [3]- [4], electric vehicles (EV) [5], wireless power transfer [6]- [7], high frequency alternating current (HFAC) power systems [8], resonant mode power conversion based cycloconverters [9] and power supplies for electrostatic precipitator [10]. RC topologies, capable of providing high voltage transfer ratio (A v ) and galvanic isolation, are used as frontend dc-dc converter in solar photovoltaic (PV) systems [11]- [12] and telecom power supplies [13].…”

Section: Introductionmentioning

confidence: 99%

Gain-Relationship-Based Automatic Resonant Frequency Tracking in Parallel <inline-formula> <tex-math notation="LaTeX">$LLC$</tex-math></inline-formula> Converter

Kundu

Sensarma

2016

IEEE Trans. Ind. Electron.

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This paper proposes a generic control scheme for automatic resonant frequency tracking (ARFT) in resonant converters. The plant is modeled based on realistic ramp variation of resonant frequency due to slowly varying environmental conditions. The proposed ARFT scheme monitors the gain relationship between an exclusive electrical variable-pair to detect frequency drift. An analytical approach is presented to select the most suitable variable-pair for gain comparison. The effects of tank parameter variation and circuit non-idealities on the gain relationship of the chosen variable-pair have been analyzed. An online correction mechanism is proposed to nullify the influence of load variation on the proposed technique. Second order generalized integrator (SOGI) based low cost analog realization of the proposed strategy is detailed. Analytical predictions are experimentally validated by applying the control scheme to a parallel LLC tank based resonant dc-dc converter.Index Terms-Automatic resonant frequency tracking (ARFT), Gain comparator, Second order generalized integrator (SOGI), Parallel LLC tank, Dc-dc converter 0278-0046 (c)

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