{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T01:10:31Z","timestamp":1760231431966,"version":"build-2065373602"},"reference-count":45,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2022,9,13]],"date-time":"2022-09-13T00:00:00Z","timestamp":1663027200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Coordena\u00e7\u00e3o de Aperfei\u00e7oamento de Pessoal de N\u00edvel Superior-Brasil (CAPES)-Finance Code 001 and CNPq","award":["Sul-Brasil-20\/2551-0000932-7"],"award-info":[{"award-number":["Sul-Brasil-20\/2551-0000932-7"]}]},{"name":"FAPERGS-Funda\u00e7\u00e3o de Amparo a Pesquisa do Estado do Rio Grande do","award":["Sul-Brasil-20\/2551-0000932-7"],"award-info":[{"award-number":["Sul-Brasil-20\/2551-0000932-7"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This work presents an inductive wireless power transfer system for powering an endoscopy capsule supplying energy to power electronic devices allocated inside a capsule of \u224826.1 mm \u00d7 9 mm. A receiver with three coils in quadrature with dimensions of \u22489 mm \u00d7 9 mm \u00d7 10 mm is located inside the capsule, moving freely inside a transmitter coil with 380 mm diameter through translations and revolutions. The proposed system tracks the variations of the equivalent magnetic coupling coefficient compensating misalignments between the transmitter and receiver coils. The power on the load is estimated and optimized from the transmitter, and the tracking control is performed by actuating on a capacitance in the matching network and on the voltage source frequency. The proposed system can prevent load overheating by limiting the power via adjusting of the magnitude of voltage source VS. Experimental results with uncertainties analysis reveal that, even at low magnetic coupling coefficients k ranging from (1.7 \u00d7 10\u22123, 3.5 \u00d7 10\u22123), the power on the load can be held within the range of 100\u2013130 mW. These results are achieved with any position of the capsule in the space, limited by the diameter of the transmitter coil and height of 200 mm when adjusting the series capacitance of the transmitter in the range (17.4, 19.4) pF and the frequency of the power source in the range (802.1, 809.5) kHz.<\/jats:p>","DOI":"10.3390\/s22186924","type":"journal-article","created":{"date-parts":[[2022,9,13]],"date-time":"2022-09-13T22:37:28Z","timestamp":1663108648000},"page":"6924","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Tracking and Dynamic Tuning of a Wireless Powered Endoscopic Capsule"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9208-2474","authenticated-orcid":false,"given":"Lucas","family":"Murliky","sequence":"first","affiliation":[{"name":"Department of Electrical Engineering, Universidade Federal do Rio Grande do Sul, Porto Alegre 91501-970, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4188-707X","authenticated-orcid":false,"given":"Gustavo","family":"Oliveira","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Universidade Federal do Rio Grande do Sul, Porto Alegre 91501-970, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1647-0421","authenticated-orcid":false,"given":"Fernando Rangel","family":"de Sousa","sequence":"additional","affiliation":[{"name":"Department of Electrical and Electronic Engineering, Universidade Federal de Santa Catarina, Florian\u00f3polis 88040-900, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6615-6134","authenticated-orcid":false,"given":"Valner Jo\u00e3o","family":"Brusamarello","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Universidade Federal do Rio Grande do Sul, Porto Alegre 91501-970, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,9,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"10929","DOI":"10.3390\/s140610929","article-title":"Application of Wireless Power Transmission Systems in Wireless Capsule Endoscopy: An Overview","volume":"14","author":"Basar","year":"2014","journal-title":"Sensors"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Kim, J.H., and Nam, S.J. 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