File Download
  • No File Attached
 
Links for fulltext
(May Require Subscription)
 
Supplementary

Conference Paper: A model to analyze and improve dynamic response of high light load efficiency multi-mode converters
  • Basic View
  • Metadata View
  • XML View
TitleA model to analyze and improve dynamic response of high light load efficiency multi-mode converters
 
AuthorsRuiyang, Y1
Pong, MH1
 
Issue Date2009
 
Citation2009 Ieee 6Th International Power Electronics And Motion Control Conference, Ipemc '09, 2009, p. 1372-1377 [How to Cite?]
DOI: http://dx.doi.org/10.1109/IPEMC.2009.5157598
 
AbstractReduced switching frequency peak current mode is a popular method to boost up light load efficiency of isolated power converters. However, transient response decreases dramatically when low switching frequency is adopted. This paper covers small signal analysis of control scheme that peak current and switching frequency both modulated by the control signal. An interesting result is found that the control scheme can be decomposed into two parts: peak current mode part and frequency modulation mode part. At low switching frequency light load conditions the bandwidth from control to output is low. According to the proposed model, special design on voltage control oscillator is desirable to boost up the bandwidth at light load conditions. By the time domain concept the switching frequency should be designed to rise quickly during step up transient in order to overcome the drawbacks caused by low switching frequency and prevent transformer saturation. Experimental prototype Two-FET-Forward converter is build to verify the proposed idea. ©2009 IEEE.
 
DescriptionIPEMC International Power Electronics & Motion Control Conference
 
DOIhttp://dx.doi.org/10.1109/IPEMC.2009.5157598
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorRuiyang, Y
 
dc.contributor.authorPong, MH
 
dc.date.accessioned2010-07-13T03:54:02Z
 
dc.date.available2010-07-13T03:54:02Z
 
dc.date.issued2009
 
dc.description.abstractReduced switching frequency peak current mode is a popular method to boost up light load efficiency of isolated power converters. However, transient response decreases dramatically when low switching frequency is adopted. This paper covers small signal analysis of control scheme that peak current and switching frequency both modulated by the control signal. An interesting result is found that the control scheme can be decomposed into two parts: peak current mode part and frequency modulation mode part. At low switching frequency light load conditions the bandwidth from control to output is low. According to the proposed model, special design on voltage control oscillator is desirable to boost up the bandwidth at light load conditions. By the time domain concept the switching frequency should be designed to rise quickly during step up transient in order to overcome the drawbacks caused by low switching frequency and prevent transformer saturation. Experimental prototype Two-FET-Forward converter is build to verify the proposed idea. ©2009 IEEE.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.descriptionIPEMC International Power Electronics & Motion Control Conference
 
dc.identifier.citation2009 Ieee 6Th International Power Electronics And Motion Control Conference, Ipemc '09, 2009, p. 1372-1377 [How to Cite?]
DOI: http://dx.doi.org/10.1109/IPEMC.2009.5157598
 
dc.identifier.doihttp://dx.doi.org/10.1109/IPEMC.2009.5157598
 
dc.identifier.epage1377
 
dc.identifier.hkuros162734
 
dc.identifier.scopuseid_2-s2.0-77951143859
 
dc.identifier.spage1372
 
dc.identifier.urihttp://hdl.handle.net/10722/62107
 
dc.languageeng
 
dc.relation.ispartof2009 IEEE 6th International Power Electronics and Motion Control Conference, IPEMC '09
 
dc.relation.referencesReferences in Scopus
 
dc.titleA model to analyze and improve dynamic response of high light load efficiency multi-mode converters
 
dc.typeConference_Paper
 
<?xml encoding="utf-8" version="1.0"?>
<item><contributor.author>Ruiyang, Y</contributor.author>
<contributor.author>Pong, MH</contributor.author>
<date.accessioned>2010-07-13T03:54:02Z</date.accessioned>
<date.available>2010-07-13T03:54:02Z</date.available>
<date.issued>2009</date.issued>
<identifier.citation>2009 Ieee 6Th International Power Electronics And Motion Control Conference, Ipemc &apos;09, 2009, p. 1372-1377</identifier.citation>
<identifier.uri>http://hdl.handle.net/10722/62107</identifier.uri>
<description>IPEMC International Power Electronics &amp; Motion Control Conference</description>
<description.abstract>Reduced switching frequency peak current mode is a popular method to boost up light load efficiency of isolated power converters. However, transient response decreases dramatically when low switching frequency is adopted. This paper covers small signal analysis of control scheme that peak current and switching frequency both modulated by the control signal. An interesting result is found that the control scheme can be decomposed into two parts: peak current mode part and frequency modulation mode part. At low switching frequency light load conditions the bandwidth from control to output is low. According to the proposed model, special design on voltage control oscillator is desirable to boost up the bandwidth at light load conditions. By the time domain concept the switching frequency should be designed to rise quickly during step up transient in order to overcome the drawbacks caused by low switching frequency and prevent transformer saturation. Experimental prototype Two-FET-Forward converter is build to verify the proposed idea. &#169;2009 IEEE.</description.abstract>
<language>eng</language>
<relation.ispartof>2009 IEEE 6th International Power Electronics and Motion Control Conference, IPEMC &apos;09</relation.ispartof>
<title>A model to analyze and improve dynamic response of high light load efficiency multi-mode converters</title>
<type>Conference_Paper</type>
<description.nature>Link_to_subscribed_fulltext</description.nature>
<identifier.doi>10.1109/IPEMC.2009.5157598</identifier.doi>
<identifier.scopus>eid_2-s2.0-77951143859</identifier.scopus>
<identifier.hkuros>162734</identifier.hkuros>
<relation.references>http://www.scopus.com/mlt/select.url?eid=2-s2.0-77951143859&amp;selection=ref&amp;src=s&amp;origin=recordpage</relation.references>
<identifier.spage>1372</identifier.spage>
<identifier.epage>1377</identifier.epage>
</item>
Author Affiliations
  1. The University of Hong Kong