Robust digital control for interleaved PFC boost converter using approximate 2DOF

Conference proceedings article

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Publication Details

Author list: Satake Y., Furuya H., Mochizuki Y., Fukaishi Y., Higuchi K., Chamnongthai K.

Publisher: Hindawi

Publication year: 2013

ISBN: 9781479905454

ISSN: 0146-9428

eISSN: 1745-4557

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883077918&doi=10.1109%2fECTICon.2013.6559546&partnerID=40&md5=f3106cdd1598b8a01396f1564ff77efd

Languages: English-Great Britain (EN-GB)

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Abstract

In recent years, improving of power factor and reducing harmonic distortion in electrical instruments are needed. In general, a current conduction mode boost converter is used for active PFC (Power Factor Correction). In a PFC boost converter, if a duty ratio, a load resistance and an input voltage are changed, the dynamic characteristics are varied greatly. This is the prime reason of difficulty of controlling the interleaved PFC boost converter. In this paper, a robust digital controller for suppressing the change of step response characteristics and variation of output voltage at a DC-DC buck converter load sudden change with high power factor and low harmonic is proposed. Experimental studies using a micro-processor for controller demonstrate that this type of digital controller is effective to improve power factor and to suppress output voltage variation. ฉ 2013 IEEE.

Keywords

Approximate 2DOF, Boost converter, Digital robust control, micro-processor, Power factor correction (PFC)