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Abstract:
One of the main orientations in power electronics in the last decade has
been the development of switching-mode converters without inductors and
transformers.Light weight,small size and high power density are the
result of using only switches and capacitors in the power stage.The
request of miniaturization of the power supply was similar with the
process that lead to the development of active filters for replacing the
old ,bulky,passive filters.The switched-capacitor (SC) converters serve
as ideal power supplies for mobile electronic systems (cellular
phones,personal digital assistants,military equipment,etc).Due to their
large conversion ration,the SC converters are able to realize step-down
of the voltage to 3 V or even a smaller supply voltage for integrated
circuits,or steep step-up of the voltage for automotive industry or
internet services in the telecom industry.
The use of a switched-capacitor circuit for processing energy seemed
doomed to failure :it is known that charging a capacitor from zero is
achieved at a 50 % efficiency.Controlling the energy processing through
a switched-capacitor circuit (a task done previously by inductors) was
another challenge.Ten years of research were needed to overcome these
dilemmas and to develop high-efficient switched-capacitor controlled
energy-processing circuits.
Topics in this half-day course will include the presentation of the
theory of processing energy through a switched-capacitor
circuit,step-down,step-up and inverting structures of SC DC-DC
converters,SC DC-AC inverters,their design,transient and steady-state
characteristics,a discussion of the efficiency and ripple in the output
voltage,commercially-available SC converters,soft-switching converters
with SC circuit,bi-directional SC converters and continuous-input
current SC converters.
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About the Presenter:
Adrian Ioinovici published about 100 papers in the field of power
electronics:analysis ,simulation and stability-oriented design of
switching-mode circuits,soft-switching and switched-capacitor electronic
converters.He has served as an Associate-Editor for Power Electronics of
IEEE Transactions on CAS - Part I and Journal of Circuits,Systems and
Computers,Guest-Co-Editor of a special issue of Trans on CAS dedicated
to switching circuits,Chair of the Technical Committee on Power Systems
and Power Electronics of the CAS Society.
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