Efficient, Load Independent and Self-Regulated Wireless Power Transfer with Multiple Loads for Long Distance IoT Applications
Department of Electrical Engineering, Incheon National University, Incheon 22012, Korea
*
Authors to whom correspondence should be addressed.
Energies 2021, 14(4), 1035; https://doi.org/10.3390/en14041035
Received: 13 January 2021
/
Revised: 7 February 2021
/
Accepted: 11 February 2021
/
Published: 16 February 2021
(This article belongs to the Special Issue Next Generation Wireless Charging System for Mobile Devices)
This paper proposes a wireless power transfer (WPT) system by placing repeater coils to transfer power to multiple loads for the internet of things (IoT) devices and sensors in smart grid applications. The proposed system intermediate resonators (repeaters) not only function as power relays to enhance the transfer distance but also supplies power to its load attached to them. Equal power distribution and load-independent characteristics were obtained without efficiency degradation when any one of the loads was changed during system operation. Identical high-quality factor coils were designed using Litz-wire to reduce the skin effect. The coil size was 15.5 cm × 15.5 cm and the four relays achieved total efficiency of 51.7%, delivering 2 W power and output voltage of 5 V to each load with a total power transfer distance of 62 cm.
View Full-Text
▼
Show Figures
Figure 1
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
MDPI and ACS Style
Hassan, N.u.; Lee, W.; Lee, B. Efficient, Load Independent and Self-Regulated Wireless Power Transfer with Multiple Loads for Long Distance IoT Applications. Energies 2021, 14, 1035. https://doi.org/10.3390/en14041035
AMA Style
Hassan Nu, Lee W, Lee B. Efficient, Load Independent and Self-Regulated Wireless Power Transfer with Multiple Loads for Long Distance IoT Applications. Energies. 2021; 14(4):1035. https://doi.org/10.3390/en14041035
Chicago/Turabian StyleHassan, Najam u., Woochan Lee, and Byunghun Lee. 2021. "Efficient, Load Independent and Self-Regulated Wireless Power Transfer with Multiple Loads for Long Distance IoT Applications" Energies 14, no. 4: 1035. https://doi.org/10.3390/en14041035
Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
