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Wireless Micro Soft Actuator without Payloads Using 3D Helical Coils. | LitMetric

Wireless Micro Soft Actuator without Payloads Using 3D Helical Coils.

Micromachines (Basel)

Department of Control and Instrumentation Engineering, Korea University, Sejong 30019, Korea.

Published: May 2022

AI Article Synopsis

  • - The study explores the creation of three-dimensional helical inductors for wireless power transfer, which outperform traditional two-dimensional spiral inductors by better capturing magnetic flux.
  • - Using a unique three-dimensional printed soluble mold technique, researchers developed a heater with helical coils that greatly increases heating area and efficiency.
  • - This innovative heater design boosted temperature in the actuator significantly, leading to a much longer stroke and paving the way for advanced wireless micro soft robots without the need for heavy batteries.

Article Abstract

To receive a greater power and to demonstrate the soft bellows-shaped actuator's wireless actuation, micro inductors were built for wireless power transfer and realized in a three-dimensional helical structure, which have previously been built in two-dimensional spiral structures. Although the three-dimensional helical inductor has the advantage of acquiring more magnetic flux linkage than the two-dimensional spiral inductor, the existing microfabrication technique produces a device on a two-dimensional plane, as it has a limit to building a complete three-dimensional structure. In this study, by using a three-dimensional printed soluble mold technique, a three-dimensional heater with helical coils, which have a larger heating area than a two-dimensional heater, was fabricated with three-dimensional receiving inductors for enhanced wireless power transfer. The three-dimensional heater connected to the three-dimensional helical inductor increased the temperature of the liquid and gas inside the bellows-shaped actuator while reaching 176.1% higher temperature than the heater connected to the two-dimensional spiral inductor. Thereby it enables a stroke of the actuator up to 522% longer than when it is connected to the spiral inductor. Therefore, three-dimensional micro coils can offer a significant approach to the development of wireless micro soft robots without incurring heavy and bulky parts such as batteries.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9143378PMC
http://dx.doi.org/10.3390/mi13050799DOI Listing

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