Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/135130
Title: NON RESONANT INDUCTIVE LINK DC-DC CONVERTERS FOR INDUSTRIAL APPLICATIONS
Authors: RAMPRAKASH KATHIRESAN
Keywords: Hold-up time, Data-centre PSU, Multi-channel LED Driver, Current mismatch, Purely Inductive Decoupling, Micro-inverter
Issue Date: 19-Aug-2016
Citation: RAMPRAKASH KATHIRESAN (2016-08-19). NON RESONANT INDUCTIVE LINK DC-DC CONVERTERS FOR INDUSTRIAL APPLICATIONS. ScholarBank@NUS Repository.
Abstract: High switching-frequency DC-DC converters with galvanic isolation are industry workhorse for wide range of applications. Power converter topologies are generally classified into resonant and non-resonant. The non-resonant converters are controlled by simple fixed switching frequency PWM control and their performance is immune to manufacturing variations. Non-resonant converters suffer from drastic efficiency reduction at mid and light loads due to loss of inherent soft-switching of semiconductor devices and fail to meet Energy Star efficiency standards. Resonant converters utilize an intermediate resonant tank and are controlled by variable frequency control. Resonant converters enjoy a wide range of natural soft switching but suffer from dynamic oscillations due to presence of resonant tank for which complicated trajectory control methods are necessary and exhibit a poor stability. This thesis proposes a novel inductive link non-resonant DC-DC converter with extended natural soft switching range for meeting energy star efficiency standards, controllable by simple frequency control and possess global asymptotic stability. Its forms in both isolated half-bridge and full-bridge configurations are investigated in this thesis and developed for application in LED lighting, data-center power supply and grid-integration of Solar-Photovoltaics.
URI: http://scholarbank.nus.edu.sg/handle/10635/135130
Appears in Collections:Ph.D Theses (Open)

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