A resonant current-mode wireless power transfer for implantable medical devices: an overview
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- Title
- A resonant current-mode wireless power transfer for implantable medical devices: an overview
- Authors
- Kim Jong-Hun; Hassan Najam ul; Lee Seung-Ju; Jung Yeon-Woo; Shin Se-Un
- Date Issued
- 2022-08
- Publisher
- 대한의용생체공학회
- Abstract
- Implantable Medical Devices (IMDs) have been developing in ways to be lighter and lower-power systems. In the view of such developments, the battery recharging capacity to ensure the stable operation of the system is essential. Wireless power transfer (WPT) was proposed as a solution to recharge the battery without complex metallic contacts. However, due to limitations such as threshold voltage of power switches and minimal input power of the multi-stage structure (Rectifier + Regulator/DC-DC converter) of conventional voltage-mode (VM) WPT, there are drawbacks of an input power range above a certain threshold level and limitations due to strict regulations on the human body. These issues make the design of the IMD battery charger much harder and prevent IMDs from being a more viable option for people-in-need. This paper introduces distinguishing characteristics of resonant current-mode (RCM) WPT technology to overcome the aforementioned issues. It also describes the basic theory, conventional circuits of VM/RCM, comparisons, and major challenges of RCM. Finally, advanced and efficiency-enhancing techniques of the-state-of-art works among the RCM topologies will be discussed to follow up the trend of RCM WPT.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/120275
- DOI
- 10.1007/s13534-022-00231-1
- ISSN
- 2093-9868
- Article Type
- Article
- Citation
- Biomedical Engineering Letters (BMEL), vol. 12, no. 3, page. 229 - 238, 2022-08
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