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| Autores principales: | , , , |
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| Formato: | Artículo Open Access |
| Publicado: |
Wiley
2024
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| Materias: | |
| Acceso en línea: | https://onlinelibrary.wiley.com/doi/10.1002/cta.4351 |
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- Wireless Power Transfer System for Cardiac Pacemakers Based on Spiral Ring mu‐Negative Materials Souleiman Hassan Guirreh Feiyu Zhu Weihua Chen Jishen Peng International Journal of Circuit Theory and Applications ABSTRACTConsidering the impact of metamaterials on the magnetic coupling effect and electromagnetic response characteristics in wireless power transfer systems for implantable cardiac pacemakers, this paper proposes a wireless power transfer system operating at the 300‐kHz frequency band, enhanced by spiral ring mu‐negative materials (SR‐MNG) to improve magnetic coupling efficiency. First, based on the resonance principle, the SR‐MNG is designed, and the system's mutual inductance coupling is analyzed using the magnetic dipole coupling model theory. Second, the impact of metamaterial thickness and loss on the system's coupling strength is investigated, and the performance of the system is analyzed when using FR4, polyimide, and aluminum nitride as dielectric substrate. The system's tolerance to misalignment is discussed bearing in mind the special implantation environment of the peacemaker. The experimental results indicate that, at a transmission distance of 20 mm, the system achieves optimal magnetic coupling strength with a thickness of 1.6 mm, resulting in a minimum power transmission efficiency of 71%. Increasing the thickness to 2 mm disrupts the trend of increasing efficiency, causing it to drop by at least 23.3%. The SR‐MNG with polyimide as the dielectric plate performs exceptionally well, maintaining an efficiency range of 17.3%–73.1% for lateral displacements between 0 and 30 mm and achieving a minimum efficiency of 39.2% for angular misalignment of 15°. 10.1002/cta.4351 http://onlinelibrary.wiley.com/termsAndConditions#vor