An Interleaved LLC Resonant Converter Operating at Constant Switching Frequency
The interleaving technique is necessary for LLC resonant converters to achieve high power level. The advantages include expanded power capacity, lower output ripple current, and higher light-load efficiency by using phase shedding. However, conventional frequency-controlled LLC converters will lose...
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| Veröffentlicht in: | IEEE transactions on power electronics 2014-06, Vol.29 (6), p.2931-2943 |
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| creator | ZHIYUAN HU YAJIE QIU LAILI WANG LIU, Yan-Fei |
| description | The interleaving technique is necessary for LLC resonant converters to achieve high power level. The advantages include expanded power capacity, lower output ripple current, and higher light-load efficiency by using phase shedding. However, conventional frequency-controlled LLC converters will lose regulation in individual phases if all the phases are operating at the same switching frequency, causing load sharing problem. Existing load sharing solutions for interleaved LLC converters all have limitations. In this paper, a switch-controlled capacitor (SCC) modulated LLC converter (SCC-LLC) is presented to solve the load-sharing problem. With constant switching frequency, interleaving and phase shedding can be achieved. A 600-W, two-phase interleaved constant frequency SCC-LLC prototype is built to verify the feasibility and demonstrate the advantages. |
| doi_str_mv | 10.1109/TPEL.2013.2273939 |
| format | Article |
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The advantages include expanded power capacity, lower output ripple current, and higher light-load efficiency by using phase shedding. However, conventional frequency-controlled LLC converters will lose regulation in individual phases if all the phases are operating at the same switching frequency, causing load sharing problem. Existing load sharing solutions for interleaved LLC converters all have limitations. In this paper, a switch-controlled capacitor (SCC) modulated LLC converter (SCC-LLC) is presented to solve the load-sharing problem. With constant switching frequency, interleaving and phase shedding can be achieved. A 600-W, two-phase interleaved constant frequency SCC-LLC prototype is built to verify the feasibility and demonstrate the advantages.</description><identifier>ISSN: 0885-8993</identifier><identifier>EISSN: 1941-0107</identifier><identifier>DOI: 10.1109/TPEL.2013.2273939</identifier><identifier>CODEN: ITPEE8</identifier><language>eng</language><publisher>New York, NY: IEEE</publisher><subject>Applied sciences ; Capacitors ; Circuit properties ; Control ; Controllers ; Converters ; Convertors ; Electric, optical and optoelectronic circuits ; Electrical engineering. 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The advantages include expanded power capacity, lower output ripple current, and higher light-load efficiency by using phase shedding. However, conventional frequency-controlled LLC converters will lose regulation in individual phases if all the phases are operating at the same switching frequency, causing load sharing problem. Existing load sharing solutions for interleaved LLC converters all have limitations. In this paper, a switch-controlled capacitor (SCC) modulated LLC converter (SCC-LLC) is presented to solve the load-sharing problem. With constant switching frequency, interleaving and phase shedding can be achieved. A 600-W, two-phase interleaved constant frequency SCC-LLC prototype is built to verify the feasibility and demonstrate the advantages.</description><subject>Applied sciences</subject><subject>Capacitors</subject><subject>Circuit properties</subject><subject>Control</subject><subject>Controllers</subject><subject>Converters</subject><subject>Convertors</subject><subject>Electric, optical and optoelectronic circuits</subject><subject>Electrical engineering. Electrical power engineering</subject><subject>Electrical machines</subject><subject>Electronic circuits</subject><subject>Electronics</subject><subject>Energy efficiency</subject><subject>Exact sciences and technology</subject><subject>Feasibility</subject><subject>Frequencies</subject><subject>Inductance</subject><subject>Load sharing</subject><subject>Mathematical problems</subject><subject>MOSFET</subject><subject>Power electronics, power supplies</subject><subject>Regulation and control</subject><subject>Resonant frequency</subject><subject>Resonant power conversion</subject><subject>Ripples</subject><subject>Shedding</subject><subject>Signal convertors</subject><subject>switched-mode power supplies</subject><subject>Switches</subject><subject>Switching</subject><subject>Switching frequency</subject><subject>Transformers</subject><subject>Zero voltage switching</subject><issn>0885-8993</issn><issn>1941-0107</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpdkFtLw0AQhRdRsF5-gPgSEMGX1J29Zh-l1AsEKl6el-12opG4qbup0n9vYksfnJeBOd-ZGQ4hZ0DHANRcvzxOyzGjwMeMaW642SMjMAJyClTvkxEtCpkXxvBDcpTSB6UgJIURmd2E7CF0GBt037jIynKSPWFqgwtdNmnDN8ZezGZLjK6rw1vm_sapG_Tnn7rz78P0NuLXCoNfn5CDyjUJT7f9mLzeTl8m93k5u3uY3JS551J1OaChhUPjuDJeLripuJj7SngvZMW1gIXRFZszMXdzpaVkmi0YgqFC9QUVPyZXm73L2PaXU2c_6-SxaVzAdpUsKA1SA6OmRy_-oR_tKob-OwvCKCWENqynYEP52KYUsbLLWH-6uLZA7RCxHSK2Q8R2G3Hvudxudsm7poou-DrtjKxQVFApeu58w9WIuJOVVBxowX8BG9uDCg</recordid><startdate>20140601</startdate><enddate>20140601</enddate><creator>ZHIYUAN HU</creator><creator>YAJIE QIU</creator><creator>LAILI WANG</creator><creator>LIU, Yan-Fei</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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The advantages include expanded power capacity, lower output ripple current, and higher light-load efficiency by using phase shedding. However, conventional frequency-controlled LLC converters will lose regulation in individual phases if all the phases are operating at the same switching frequency, causing load sharing problem. Existing load sharing solutions for interleaved LLC converters all have limitations. In this paper, a switch-controlled capacitor (SCC) modulated LLC converter (SCC-LLC) is presented to solve the load-sharing problem. With constant switching frequency, interleaving and phase shedding can be achieved. A 600-W, two-phase interleaved constant frequency SCC-LLC prototype is built to verify the feasibility and demonstrate the advantages.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TPEL.2013.2273939</doi><tpages>13</tpages></addata></record> |
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| subjects | Applied sciences Capacitors Circuit properties Control Controllers Converters Convertors Electric, optical and optoelectronic circuits Electrical engineering. Electrical power engineering Electrical machines Electronic circuits Electronics Energy efficiency Exact sciences and technology Feasibility Frequencies Inductance Load sharing Mathematical problems MOSFET Power electronics, power supplies Regulation and control Resonant frequency Resonant power conversion Ripples Shedding Signal convertors switched-mode power supplies Switches Switching Switching frequency Transformers Zero voltage switching |
| title | An Interleaved LLC Resonant Converter Operating at Constant Switching Frequency |
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