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Micromachines 2017, 8(9), 269;

Miniaturization of Implantable Micro-Robot Propulsion Using a Wireless Power Transfer System

The Cho Chun Shik Graduate School for Green Transportation, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
Department of Electronic Engineering, the University of Suwon, Hwaseong 18123, Korea
Author to whom correspondence should be addressed.
Received: 1 August 2017 / Revised: 18 August 2017 / Accepted: 24 August 2017 / Published: 1 September 2017
(This article belongs to the Special Issue Wireless Microdevices and Systems for Biomedical Applications)
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This paper presents an efficient coil design for a mm-sized micro-robot which generates a propulsion force and torque and receives electrical energy using a wireless power transfer system. To determine the most efficient coil structures and produce propulsion and torque on the micro-robot, both helical and spiral coil modeling was conducted, and analytical formulations of the propulsion force and torque were derived for helical and spiral coil structures. Additionally, the dominant dimensional factors for determining propulsion and coil torque were analyzed in detail. Based on the results, an optimum coil structure for generating maximum force on the micro-robot was developed and is herein presented with dimensional analysis. Simulations and experiments were also conducted to verify the design, and good agreement was achieved. A 3-mm micro-robot that simultaneously generated a propulsion force and torque and received electrical energy via wireless power transfer was successfully fabricated using the proposed method and verified. View Full-Text
Keywords: micro-robot; biomedical devices; wireless power transfer; miniaturization; propulsion micro-robot; biomedical devices; wireless power transfer; miniaturization; propulsion

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Kim, D.; Hwang, K.; Park, J.; Park, H.H.; Ahn, S. Miniaturization of Implantable Micro-Robot Propulsion Using a Wireless Power Transfer System. Micromachines 2017, 8, 269.

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