Practical application of valley current mode control in a flyback converter with a large duty cycle

Chu, GML; Lu, DDC; Agelidis, VG

Practical application of valley current mode control in a flyback converter with a large duty cycle

Chu, GML Lu, DDC

Agelidis, VG

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Publication Type:: Journal Article
Citation:: IET Power Electronics, 2012, 5 (5), pp. 552 - 560
Issue Date:: 2012-05-01

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Field	Value	Language
dc.contributor.author	Chu, GML	en_US
dc.contributor.author	Lu, DDC https://orcid.org/0000-0003-2145-0580	en_US
dc.contributor.author	Agelidis, VG	en_US
dc.date.issued	2012-05-01	en_US
dc.identifier.citation	IET Power Electronics, 2012, 5 (5), pp. 552 - 560	en_US
dc.identifier.issn	1755-4535	en_US
dc.identifier.uri	http://hdl.handle.net/10453/115138
dc.description.abstract	This study proposes the application of valley current mode (VCM) control in a flyback dc-dc converter with a large duty cycle. The use of VCM control eliminates the need of slope compensation in operation under a duty cycle greater than 50%. For operation with duty cycle near the boundary value (50%), a relatively small compensation ramp is required comparing with that of the conventional peak current mode (PCM) control. Moreover, the noise sensitivity issue of PCM control is also addressed by the change of the current sensing position in VCM and hence the immunity against the current spike. The VCM-controlled flyback converter achieves consistent steady-state and transient-response performances as its PCM-controlled counterpart. Stability analyses of inner current loop and overall closed-loop system are presented. Experiments are also conducted to evaluate the effectiveness of VCM control in controlling the flyback dc-dc converter. © 2012 The Institution of Engineering and Technology.	en_US
dc.relation.ispartof	IET Power Electronics	en_US
dc.relation.isbasedon	10.1049/iet-pel.2011.0225	en_US
dc.subject.classification	Electrical & Electronic Engineering	en_US
dc.title	Practical application of valley current mode control in a flyback converter with a large duty cycle	en_US
dc.type	Journal Article
utslib.citation.volume	5	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	closed_access
pubs.issue	5	en_US
pubs.publication-status	Published	en_US
pubs.volume	5	en_US

Abstract:

This study proposes the application of valley current mode (VCM) control in a flyback dc-dc converter with a large duty cycle. The use of VCM control eliminates the need of slope compensation in operation under a duty cycle greater than 50%. For operation with duty cycle near the boundary value (50%), a relatively small compensation ramp is required comparing with that of the conventional peak current mode (PCM) control. Moreover, the noise sensitivity issue of PCM control is also addressed by the change of the current sensing position in VCM and hence the immunity against the current spike. The VCM-controlled flyback converter achieves consistent steady-state and transient-response performances as its PCM-controlled counterpart. Stability analyses of inner current loop and overall closed-loop system are presented. Experiments are also conducted to evaluate the effectiveness of VCM control in controlling the flyback dc-dc converter. © 2012 The Institution of Engineering and Technology.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/115138