Robust digital control for an LLC current-resonant DC-DC converter
Conference proceedings article
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Publication Details
Author list: Nishimura T., Adachi Y., Ohta Y., Higuchi K., Takegami E., Tomioka S., Jirasereeamornkul K., Chamnongthai K.
Publisher: Hindawi
Publication year: 2012
ISBN: 9781467320245
ISSN: 0146-9428
eISSN: 1745-4557
Languages: English-Great Britain (EN-GB)
Abstract
If a pulse frequency, a load resistance of an LLC current-resonant DC-DC converter are changed, the dynamic characteristics is varied greatly, that is, the LLC current-resonant DC-DC converter has non-linear characteristics. In many applications of DC-DC converters, loads cannot be specified in advance, and they will be changed suddenly from no loads to full loads. A DC-DC converter system used a conventional single controller cannot be adapted to change dynamics and it occurs large output voltage variation. In this paper, a robust digital controller for suppress the change of step response characteristics and variations of output voltages in the load sudden changes is proposed. Experimental studies using a micro-processor for the controller demonstrate that this type of digital controller is effective to suppress the variations. ฉ 2012 IEEE.
Keywords
DC-DC converter, LLC current-resonant, micro-processor
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