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Author: search.filters.author.Patil, U.Subject: search.filters.subject.CLL resonant converter

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    Analysis and design of a high frequency isolated full bridge CLL resonant DC-DC converter for renewable energy applications
    (Institute of Electrical and Electronics Engineers Inc., 2018) Patil, U.; Nagendrappa, H.
    In this paper, a new PWM gating scheme is proposed for fixed frequency full-bridge DC-DC CLL resonant converter with capacitive output filter. An approximate complex ac circuit approach is used for the steady state analysis of the converter. The optimum design of the converter is described with the help of design curves for a sample converter of rating 200 W, 40-80 V DC input and output DC voltage of 200 V. By applying the proposed gating scheme, higher conversion efficiency is obtained due to zero-voltage-switching of the converter switches for wide variations in input voltage and the load. PSIM simulations are performed to verify theoretical predictions about the performance of the converter for variations in load and input voltage. The theoretical and simulation results are given and discussed. © 2018 IEEE.
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    Analysis and Design of a Three Phase Interleaved CLL Resonant Converter with Fixed Frequency Modified PWM Control
    (Institute of Electrical and Electronics Engineers Inc., 2021) Patil, U.; Nagendrappa, H.
    A Three-phase interleaved CLL resonant DC-DC converter with fixed frequency modified PWM gating pattern is presented in this paper. The main benefit of the interleaving technique of the converter is to achieve higher power level, while reducing the size of filters due to lower ripples. Three identical single-phase full bridge inverter circuits with CLL resonant tank are allied in parallel on the primary of the high-frequency (HF) transformer. The operating modes of the converter for different intervals are explained with the aid of key operating waveforms. The fundamental harmonic approximation (FHA) approach is used to carry out the steady-state analysis of the converter. A 600W converter is designed and the design method is explained. PSIM simulations are done to substantiate the calculated predictions of the converter for distinct operating conditions. © 2021 IEEE.