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Stability Aspects in One-Cycle Controlled Buck ConvertersGURBINA, M. , LASCU, D.
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bifurcation, converter, one cycle control, simulation, stability
power(12), cycle(11), converters(11), control(11), converter(8), theory(7), circuits(7), systems(6), switching(6), bifurcation(6)
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About this article
Date of Publication: 2014-02-28
Volume 14, Issue 1, Year 2014, On page(s): 43 - 48
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2014.01007
Web of Science Accession Number: 000332062300007
SCOPUS ID: 84894639548
The paper aims to investigate issues related to one cycle controlled buck converters stability, in the situation when the integration capacitor discharging is performed through a non-zero value resistor, as it happens in practice. It is known that in this case the exponential discharge makes capacitor voltage theoretically never reach zero. Under these conditions, instability phenomena are expected when the discharge time is short, that is at high duty cycles. The stability condition is analytically derived with respect to the control voltage. It is shown that instability occurs with period doubling leading to a half switching frequency subharmonic. Computer simulations confirm the validity of theoretical considerations.
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