Predictive Synchronous Rectification Control Scheme for Resonant DC-DC Converters for Battery Charging and Telecom Application

Synchronous rectifier schemes for the resonant dc-dc converter significantly improve the power conversion efficiency. The predictive synchronous rectification scheme for an LCLC resonant converter for a battery charging and telecom application is proposed in this work. During converter operation, th...

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Bibliographic Details
Published in:IEEE journal of emerging and selected topics in industrial electronics (Print) 2024-10, Vol.5 (4), p.1698-1708
Main Authors: Chitpadi, Nagesha, Lakshminarasamma, N
Format: Article
Language:English
Subjects:
<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">LCLC Resonant Converter
Analog to digital converters
Batteries
Capacitors
Charging
Conduction losses
Energy conversion efficiency
MOSFET
MOSFETs
Predictive control
Rectifiers
resonant capacitor voltage sense
Resonant converters
Sensors
Switches
synchronous rectification
Telecommunications
Voltage converters (DC to DC)
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Summary:Synchronous rectifier schemes for the resonant dc-dc converter significantly improve the power conversion efficiency. The predictive synchronous rectification scheme for an LCLC resonant converter for a battery charging and telecom application is proposed in this work. During converter operation, the resonant capacitor voltage is sensed through an analog to digital converter, and based on the discretized time domain equations, the turn- on and turn- off instances are precisely computed using computation and synchronous MOSFET on time predictor block for varying switching frequency of operation. The proposed predictive technique eliminates the need for current sensors, reducing overall system cost and conduction loss associated with it. The proposed predictive synchronous rectification method is tested in a 1 kW hardware prototype for varying line and load conditions. The proposed control scheme is able to track turn- on and turn- off instances precisely with a low timing error of 2% to 3% of the synchronous MOSFET ON time.
ISSN:2687-9735
2687-9743
DOI:10.1109/JESTIE.2024.3393616