Design of A2DOF controller for LLC current-resonant DC-DC converters with delay time
Conference proceedings article
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Publication Details
Author list: Umetsu T., Suzuki T., Higuchi K., Jirasereeamornkul K.
Publisher: Hindawi
Publication year: 2015
ISBN: 9781479979608
ISSN: 0146-9428
eISSN: 1745-4557
Languages: English-Great Britain (EN-GB)
Abstract
When a pulse frequency and a load resistance of LLC current-resonant converters are changed, the static and dynamic characteristics are varied greatly. This is the prime reason why controlling LLC converters is difficult. In particular, the influence of delay time isn't negligible at sudden load change. In this paper, an A2DOF (Approximate 2-Degree-Of Freedom) controller with considering the input delay time is proposed to suppress the output voltage variation at the load sudden change and improve the settleing time of output voltage in dynamic load response. Experimental studies using a micro-processor for the controller demonstrate that this type of digital controller is effective to suppress the variation and influences of input delay time. ฉ 2015 IEEE.
Keywords
input delay time