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Peak-current-mode-controlled buck converter with positive feedforward control

The closed-loop control stability of a switching converter can be compromised when the source voltage is not an ideal voltage source, but presents finite Theacutevenin impedance. This phenomenon is called source subsystem interaction. As an active approach to improve the stability degraded by the so...

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Main Authors:	Cho, H.Y., Santi, E.
Format:	Conference Proceeding
Language:	English
Subjects:	Adaptive control Buck converters constant power load Control systems Degradation Frequency Impedance negative input impedance Output feedback positive feedforward control Stability stability g-parameter representation subsystem interaction Switching converters Unified impedance criterion Voltage control
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description	The closed-loop control stability of a switching converter can be compromised when the source voltage is not an ideal voltage source, but presents finite Theacutevenin impedance. This phenomenon is called source subsystem interaction. As an active approach to improve the stability degraded by the source subsystem interaction, the positive feedforward (PFF) control is proposed for the peak-current-mode-controlled buck converter. PFF control stabilizes the input port in the frequency range where the source subsystem interaction affects system stability, while allowing the feedback controller to maintain tight output voltage regulation at lower frequencies. The approach results in greatly improved stability with a slight reduction of output feedback control bandwidth. Small-signal models are developed based on g-parameter representation. The design technique of the positive feedforward controller is discussed. Also, the total system stability is analyzed based on the unified impedance criterion. This approach is validated by simulation.
doi_str_mv	10.1109/ECCE.2009.5316267
format	conference_proceeding
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This approach is validated by simulation.</description><subject>Adaptive control</subject><subject>Buck converters</subject><subject>constant power load</subject><subject>Control systems</subject><subject>Degradation</subject><subject>Frequency</subject><subject>Impedance</subject><subject>negative input impedance</subject><subject>Output feedback</subject><subject>positive feedforward control</subject><subject>Stability</subject><subject>stability g-parameter representation</subject><subject>subsystem interaction</subject><subject>Switching converters</subject><subject>Unified impedance criterion</subject><subject>Voltage control</subject><issn>2329-3721</issn><issn>2329-3748</issn><isbn>1424428939</isbn><isbn>9781424428939</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>2009</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><recordid>eNo9kMtOwzAURA0CiVL6AYiNf8Dh-hXbSxSFglQEi-4rJ74WpmlTOWkr_h4kIlYzZzFnMYTccyg4B_dYV1VdCABXaMlLUZoLcsuVUEpYJ90lmQkpHJNG2av_LvgNWQzDFwDw0goLfEbePtBvWXvMGfcj2_UBWdvvx9x3HQbaHNst_eUT5hEzPafxkx76IY3phDQihtjns8-BTps7ch19N-BiyjlZP9fr6oWt3pev1dOKJQcjc611WitAacpgdKMbKTW0MsogJIjodYuNBWFiiNE6BwIU59yU1jtnlJFz8vCnTYi4OeS08_l7Mx0hfwCQ8E_U</recordid><startdate>200909</startdate><enddate>200909</enddate><creator>Cho, H.Y.</creator><creator>Santi, E.</creator><general>IEEE</general><scope>6IE</scope><scope>6IL</scope><scope>CBEJK</scope><scope>RIE</scope><scope>RIL</scope></search><sort><creationdate>200909</creationdate><title>Peak-current-mode-controlled buck converter with positive feedforward control</title><author>Cho, H.Y. ; Santi, E.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i90t-9c895540e376d75b5b3350c3f3d2302fa5ceb8027fdff8990204111768a997473</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Adaptive control</topic><topic>Buck converters</topic><topic>constant power load</topic><topic>Control systems</topic><topic>Degradation</topic><topic>Frequency</topic><topic>Impedance</topic><topic>negative input impedance</topic><topic>Output feedback</topic><topic>positive feedforward control</topic><topic>Stability</topic><topic>stability g-parameter representation</topic><topic>subsystem interaction</topic><topic>Switching converters</topic><topic>Unified impedance criterion</topic><topic>Voltage control</topic><toplevel>online_resources</toplevel><creatorcontrib>Cho, H.Y.</creatorcontrib><creatorcontrib>Santi, E.</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan All Online (POP All Online) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE/IET Electronic Library</collection><collection>IEEE Proceedings Order Plans (POP All) 1998-Present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Cho, H.Y.</au><au>Santi, E.</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>Peak-current-mode-controlled buck converter with positive feedforward control</atitle><btitle>2009 IEEE Energy Conversion Congress and Exposition</btitle><stitle>ECCE</stitle><date>2009-09</date><risdate>2009</risdate><spage>2928</spage><epage>2935</epage><pages>2928-2935</pages><issn>2329-3721</issn><eissn>2329-3748</eissn><eisbn>1424428939</eisbn><eisbn>9781424428939</eisbn><abstract>The closed-loop control stability of a switching converter can be compromised when the source voltage is not an ideal voltage source, but presents finite Theacutevenin impedance. This phenomenon is called source subsystem interaction. As an active approach to improve the stability degraded by the source subsystem interaction, the positive feedforward (PFF) control is proposed for the peak-current-mode-controlled buck converter. PFF control stabilizes the input port in the frequency range where the source subsystem interaction affects system stability, while allowing the feedback controller to maintain tight output voltage regulation at lower frequencies. The approach results in greatly improved stability with a slight reduction of output feedback control bandwidth. Small-signal models are developed based on g-parameter representation. The design technique of the positive feedforward controller is discussed. Also, the total system stability is analyzed based on the unified impedance criterion. This approach is validated by simulation.</abstract><pub>IEEE</pub><doi>10.1109/ECCE.2009.5316267</doi><tpages>8</tpages></addata></record>
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source	IEEE Xplore All Conference Series
subjects	Adaptive control Buck converters constant power load Control systems Degradation Frequency Impedance negative input impedance Output feedback positive feedforward control Stability stability g-parameter representation subsystem interaction Switching converters Unified impedance criterion Voltage control
title	Peak-current-mode-controlled buck converter with positive feedforward control
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