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Indexed by:期刊论文

Date of Publication:2014-05-01

Journal:IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS

Included Journals:SCIE、EI、Scopus

Volume:10

Issue:2

Page Number:1307-1316

ISSN No.:1551-3203

Key Words:Capacitor charge balance principle; continuous conduction mode (CCM); dc-dc converter; digital control; limiting integral loop

Abstract:A new digital control technique is proposed to improve the speed of both load current and source voltage transient responses for dc-dc converters operating in continuous conduction mode (CCM). The key structure of the proposed control technique is a combination of a limiting integral loop and related arithmetic operations to produce the desired switching sequence during transient condition. The limiting integral loop is built as a novel structure for capacitor charge balance operation. In contrast to previous approaches, the proposed control technique is valid for three basic converters: 1) buck; 2) boost; and 3) buck-boost. Moreover, since the transient period is forced to be an integer multiple of the switching cycle, the advantage of fixed switching frequency is inherently provided. Simulation and experimental results from a noninverting synchronous buck-boost converter prototype are given to validate the effectiveness of the proposed solution.