Research on multi-load wireless power transfer system considering coupling between receiving coils

Research on multi-load wireless power transfer system considering coupling between receiving coils | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Research on multi-load wireless power transfer system considering coupling between receiving coils yongxiu zhao, haoyang jia, longji zhu, yahui wang This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6855239/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract In the multi-load magnetic coupling resonance wireless power transmission（MCR-WPT）system, the multiple receiving coils are coupled with each other in close proximity, which affects the system transmission efficiency and the load receiving power. To solve this problem, an equivalent circuit model with controlled sources is established for the multi-load system, the influence of the coupling between the receiving coils on the transmission characteristics is explored. Then a decoupling method based on the series compensation capacitor in the receiving loop is proposed. For the decoupled system, a method is proposed to achieve the capacitor compensation decoupling and load resistance matching by controlling the phase and amplitude of input voltage for the PWM rectifier. Thus, the system can achieve decoupling while operating under two conditions: one that maximizes transmission efficiency and another that enhances the receiving power at a designated load after decoupling. The experimental results show that the coupling coefficient k12 between the receiving coils is in the range of 0-0.1, the system achieves decoupling and the transmission efficiency is higher than 87%, and the maximum efficiency is 89.7%. Input voltage VDC=30V, MP1=MP2=6μH, RL1=30Ω, RL2=25Ω, and k12=0.1, the maximum received power of load 1 is 21W, which verifies the correctness of the theoretical derivation. MCR-WPT Multiple loads Receiving inter-coil coupling Compensation capacitor PWM rectifier Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-6855239","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":495956706,"identity":"3c3e8c96-ed5b-424e-9e13-2641696a493e","order_by":0,"name":"yongxiu zhao","email":"","orcid":"","institution":"Xi'an University of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"yongxiu","middleName":"","lastName":"zhao","suffix":""},{"id":495956707,"identity":"e032fc40-ea84-4d46-8246-fca1bee62c31","order_by":1,"name":"haoyang jia","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA1klEQVRIiWNgGAWjYBACAyjNzMbAfODAhx+kaWFLPDizhwQtQMBjfJiDjQgt5uyHj0n83FHLzsd+5sNhBh4GeX6xA/i1WPakpUn2njnOzMaTu+FwgQWD4czZCQQcdiDHTIK37RjQL0AtM3gYEgxuE9Jy/o2Z5F+QFv43Dw7zsBGj5UaOmTRvWw0zm0QOA7FaniVby7YdAGp5ZgAMZAki/HI++eDNt211yfL9yY8/fPhhI88vTUALELBIMDAcToZyJAgqBwHmDwwMdXZEKR0Fo2AUjIKRCQAD+0SlOwhRnAAAAABJRU5ErkJggg==","orcid":"","institution":"Xi'an University of Science and Technology","correspondingAuthor":true,"prefix":"","firstName":"haoyang","middleName":"","lastName":"jia","suffix":""},{"id":495956708,"identity":"0a84d54a-1e51-4b18-a4a0-6b8c969b254a","order_by":2,"name":"longji zhu","email":"","orcid":"","institution":"Xi'an University of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"longji","middleName":"","lastName":"zhu","suffix":""},{"id":495956709,"identity":"5acf2ed1-9ff3-48ad-bd9e-d0df16f7acfc","order_by":3,"name":"yahui wang","email":"","orcid":"","institution":"Xi'an University of Science and Technology","correspondingAuthor":false,"prefix":"","firstName":"yahui","middleName":"","lastName":"wang","suffix":""}],"badges":[],"createdAt":"2025-06-09 14:08:20","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6855239/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6855239/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":109761882,"identity":"b58fc237-c748-40e9-b1a1-6f977a736697","added_by":"auto","created_at":"2026-05-22 07:30:35","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1262214,"visible":true,"origin":"","legend":"","description":"","filename":"BlindedManuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6855239/v1_covered_0391bc31-8463-41b8-a6f5-76a6f34e7853.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Research on multi-load wireless power transfer system considering coupling between receiving coils","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"MCR-WPT, Multiple loads, Receiving inter-coil coupling, Compensation capacitor, PWM rectifier","lastPublishedDoi":"10.21203/rs.3.rs-6855239/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6855239/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"In the multi-load magnetic coupling resonance wireless power transmission（MCR-WPT）system, the multiple receiving coils are coupled with each other in close proximity, which affects the system transmission efficiency and the load receiving power. To solve this problem, an equivalent circuit model with controlled sources is established for the multi-load system, the influence of the coupling between the receiving coils on the transmission characteristics is explored. Then a decoupling method based on the series compensation capacitor in the receiving loop is proposed. For the decoupled system, a method is proposed to achieve the capacitor compensation decoupling and load resistance matching by controlling the phase and amplitude of input voltage for the PWM rectifier. Thus, the system can achieve decoupling while operating under two conditions: one that maximizes transmission efficiency and another that enhances the receiving power at a designated load after decoupling. The experimental results show that the coupling coefficient k12 between the receiving coils is in the range of 0-0.1, the system achieves decoupling and the transmission efficiency is higher than 87%, and the maximum efficiency is 89.7%. 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