Hybrid-Mode PFM Control for LLC Resonant Converter
This article presents a new hybrid-mode pulse-frequency-modulation control method for an LLC resonant converter. In the proposed control method, the primary-side resonant current sensing signal of the current-mode control variable is combined with a ramp signal of the voltage-mode control variable t...
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| Veröffentlicht in: | IEEE transactions on power electronics 2022-01, Vol.37 (1), p.274-284 |
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| creator | Moon, Sang Cheol Chiu, Chen-Hua |
| description | This article presents a new hybrid-mode pulse-frequency-modulation control method for an LLC resonant converter. In the proposed control method, the primary-side resonant current sensing signal of the current-mode control variable is combined with a ramp signal of the voltage-mode control variable to determine an operating frequency. Then, the proposed control method mainly modulates the ramp signal in accordance with the output load condition. Therefore, the control-to-output voltage transfer function has both the current - mode control and voltage-mode control characteristics that provide fast frequency response and stable output voltage regulation in a light-load condition. In addition, since the ramp signal is also used for slope compensation of the resonant current sensing signal, an external slope compensation circuit is not required. A small-signal ac modeling and loop analysis of the proposed method verify the advantages. The proposed control method is implemented into a field programmable gate array (FPGA) board with an analog front-end board. An experiment is carried out on a 288-W LLC resonant converter. The result shows that the proposed control method provides fast dynamic performance and stable operation under a light-load condition without an additional slope compensation circuit. |
| doi_str_mv | 10.1109/TPEL.2021.3099779 |
| format | Article |
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In the proposed control method, the primary-side resonant current sensing signal of the current-mode control variable is combined with a ramp signal of the voltage-mode control variable to determine an operating frequency. Then, the proposed control method mainly modulates the ramp signal in accordance with the output load condition. Therefore, the control-to-output voltage transfer function has both the current - mode control and voltage-mode control characteristics that provide fast frequency response and stable output voltage regulation in a light-load condition. In addition, since the ramp signal is also used for slope compensation of the resonant current sensing signal, an external slope compensation circuit is not required. A small-signal ac modeling and loop analysis of the proposed method verify the advantages. The proposed control method is implemented into a field programmable gate array (FPGA) board with an analog front-end board. An experiment is carried out on a 288-W LLC resonant converter. The result shows that the proposed control method provides fast dynamic performance and stable operation under a light-load condition without an additional slope compensation circuit.</description><identifier>ISSN: 0885-8993</identifier><identifier>EISSN: 1941-0107</identifier><identifier>DOI: 10.1109/TPEL.2021.3099779</identifier><identifier>CODEN: ITPEE8</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Capacitors ; Circuits ; Compensation ; Control methods ; Control theory ; Converters ; dc-dc power converters ; Electric potential ; Field programmable gate arrays ; Frequency control ; Frequency response ; Integrated circuits ; Resonant converters ; Resonant frequency ; Sensors ; switched mode power supplies ; Transfer functions ; Voltage ; Voltage control</subject><ispartof>IEEE transactions on power electronics, 2022-01, Vol.37 (1), p.274-284</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2022</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c293t-17361b5c5c788408e964973a910ce93215e1ae1bd8939454458b0ea36b5c07843</citedby><cites>FETCH-LOGICAL-c293t-17361b5c5c788408e964973a910ce93215e1ae1bd8939454458b0ea36b5c07843</cites><orcidid>0000-0002-9183-1496</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/9496168$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,780,784,796,27924,27925,54758</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/9496168$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Moon, Sang Cheol</creatorcontrib><creatorcontrib>Chiu, Chen-Hua</creatorcontrib><title>Hybrid-Mode PFM Control for LLC Resonant Converter</title><title>IEEE transactions on power electronics</title><addtitle>TPEL</addtitle><description>This article presents a new hybrid-mode pulse-frequency-modulation control method for an LLC resonant converter. In the proposed control method, the primary-side resonant current sensing signal of the current-mode control variable is combined with a ramp signal of the voltage-mode control variable to determine an operating frequency. Then, the proposed control method mainly modulates the ramp signal in accordance with the output load condition. Therefore, the control-to-output voltage transfer function has both the current - mode control and voltage-mode control characteristics that provide fast frequency response and stable output voltage regulation in a light-load condition. In addition, since the ramp signal is also used for slope compensation of the resonant current sensing signal, an external slope compensation circuit is not required. A small-signal ac modeling and loop analysis of the proposed method verify the advantages. The proposed control method is implemented into a field programmable gate array (FPGA) board with an analog front-end board. An experiment is carried out on a 288-W LLC resonant converter. The result shows that the proposed control method provides fast dynamic performance and stable operation under a light-load condition without an additional slope compensation circuit.</description><subject>Capacitors</subject><subject>Circuits</subject><subject>Compensation</subject><subject>Control methods</subject><subject>Control theory</subject><subject>Converters</subject><subject>dc-dc power converters</subject><subject>Electric potential</subject><subject>Field programmable gate arrays</subject><subject>Frequency control</subject><subject>Frequency response</subject><subject>Integrated circuits</subject><subject>Resonant converters</subject><subject>Resonant frequency</subject><subject>Sensors</subject><subject>switched mode power supplies</subject><subject>Transfer functions</subject><subject>Voltage</subject><subject>Voltage control</subject><issn>0885-8993</issn><issn>1941-0107</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNo9kE1Lw0AQQBdRsFZ_gHgJeE6d2Y_szlFCa4UUi9TzkqRTaKnZukmF_nsTWjzNYd6bgSfEI8IEEehltZwWEwkSJwqIrKUrMULSmAKCvRYjcM6kjkjdiru23QGgNoAjIeenKm7X6SKsOVnOFkkemi6GfbIJMSmKPPnkNjRl0w2LX44dx3txsyn3LT9c5lh8zaarfJ4WH2_v-WuR1pJUl6JVGVamNrV1ToNjyjRZVRJCzaQkGsaSsVo7UqSN1sZVwKXKeges02osns93DzH8HLnt_C4cY9O_9NJYg0o6ZXsKz1QdQ9tG3vhD3H6X8eQR_JDGD2n8kMZf0vTO09nZMvM_T5oyzJz6A0fmXBo</recordid><startdate>202201</startdate><enddate>202201</enddate><creator>Moon, Sang Cheol</creator><creator>Chiu, Chen-Hua</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>JQ2</scope><scope>KR7</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-9183-1496</orcidid></search><sort><creationdate>202201</creationdate><title>Hybrid-Mode PFM Control for LLC Resonant Converter</title><author>Moon, Sang Cheol ; Chiu, Chen-Hua</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c293t-17361b5c5c788408e964973a910ce93215e1ae1bd8939454458b0ea36b5c07843</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Capacitors</topic><topic>Circuits</topic><topic>Compensation</topic><topic>Control methods</topic><topic>Control theory</topic><topic>Converters</topic><topic>dc-dc power converters</topic><topic>Electric potential</topic><topic>Field programmable gate arrays</topic><topic>Frequency control</topic><topic>Frequency response</topic><topic>Integrated circuits</topic><topic>Resonant converters</topic><topic>Resonant frequency</topic><topic>Sensors</topic><topic>switched mode power supplies</topic><topic>Transfer functions</topic><topic>Voltage</topic><topic>Voltage control</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Moon, Sang Cheol</creatorcontrib><creatorcontrib>Chiu, Chen-Hua</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005-present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>ProQuest Computer Science Collection</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>IEEE transactions on power electronics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Moon, Sang Cheol</au><au>Chiu, Chen-Hua</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hybrid-Mode PFM Control for LLC Resonant Converter</atitle><jtitle>IEEE transactions on power electronics</jtitle><stitle>TPEL</stitle><date>2022-01</date><risdate>2022</risdate><volume>37</volume><issue>1</issue><spage>274</spage><epage>284</epage><pages>274-284</pages><issn>0885-8993</issn><eissn>1941-0107</eissn><coden>ITPEE8</coden><abstract>This article presents a new hybrid-mode pulse-frequency-modulation control method for an LLC resonant converter. In the proposed control method, the primary-side resonant current sensing signal of the current-mode control variable is combined with a ramp signal of the voltage-mode control variable to determine an operating frequency. Then, the proposed control method mainly modulates the ramp signal in accordance with the output load condition. Therefore, the control-to-output voltage transfer function has both the current - mode control and voltage-mode control characteristics that provide fast frequency response and stable output voltage regulation in a light-load condition. In addition, since the ramp signal is also used for slope compensation of the resonant current sensing signal, an external slope compensation circuit is not required. A small-signal ac modeling and loop analysis of the proposed method verify the advantages. The proposed control method is implemented into a field programmable gate array (FPGA) board with an analog front-end board. An experiment is carried out on a 288-W LLC resonant converter. The result shows that the proposed control method provides fast dynamic performance and stable operation under a light-load condition without an additional slope compensation circuit.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TPEL.2021.3099779</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0002-9183-1496</orcidid></addata></record> |
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| ispartof | IEEE transactions on power electronics, 2022-01, Vol.37 (1), p.274-284 |
| issn | 0885-8993 1941-0107 |
| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Capacitors Circuits Compensation Control methods Control theory Converters dc-dc power converters Electric potential Field programmable gate arrays Frequency control Frequency response Integrated circuits Resonant converters Resonant frequency Sensors switched mode power supplies Transfer functions Voltage Voltage control |
| title | Hybrid-Mode PFM Control for LLC Resonant Converter |
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