Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-05-01

Journal: IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS

Included Journals: Scopus、EI、SCIE

Volume: 10

Issue: 2

Page Number: 1307-1316

ISSN: 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.