scholarly journals Electromagnetic Induction Wireless Power Transmission Efficiency Research

2015 ◽  
Author(s):  
NingNing Chen
Keyword(s):  
Electromagnetic Induction ◽  
Power Transmission ◽  
Transmission Efficiency ◽  
Wireless Power ◽  
Wireless Power Transmission

scholarly journals Textile-Based Coils for Inductive Wireless Power Transmission

2021 ◽  
Vol 11 (9) ◽  
pp. 4309
Author(s):  
Sebastian Micus ◽  
Laura Padani ◽  
Michael Haupt ◽  
Götz T. Gresser
Keyword(s):  
Electromagnetic Induction ◽  
Power Transmission ◽  
Near Field ◽  
Electrical Energy ◽  
Transmission Efficiency ◽  
Maximum Efficiency ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Conductive Materials ◽  
Transmission Quality

We developed and evaluated different textile-based inductive coils for near-field wireless power transmission. The technology uses electromagnetic induction for the contactless transfer of electrical energy. Therefore, we investigated various methods for the attachment of conductive materials on a textile-based material and the production of textile-based coils based on QI standard. Afterwards, the textile-based coils were examined and evaluated due to their specific quality characteristics. This happens by calculating the transmission quality and the maximum efficiency of the system which enables comparison of different coil systems and indicates the transmission efficiency of the systems.

Compensating Resonant Frequency via Adjusting Adjustable Coil Automatically

2019 ◽  
Vol 12 (5) ◽  
pp. 432-438
Author(s):  
Jin Xu ◽  
Yuting Zhao
Keyword(s):  
Resonant Frequency ◽  
Power Transmission ◽  
Reference Value ◽  
Transmission Efficiency ◽  
Theoretical Research ◽  
Future Research ◽  
Wireless Power ◽  
Wireless Power Transmission ◽  
Resonant Coupling ◽  
Transmission Distance

Background: Detuning is the main problem that affects the efficiency and transmission distance of the resonant coupling Wireless Power Transmission (WPT). The distance of load and the offset of the load position could cause serious detuning. Methods: This paper presents an adjustable coil in which inductance can be adjusted. Then a model of WPT was established that could compensate resonant frequency automatically using the adjustable coil. Next, the relationship between the primary resonant frequency and the transmission efficiency is analyzed from the circuit. The analysis proved that the design of the adjustable coil could improve the transmission efficiency of the WPT system. Finally, a prototype of WPT system was built. Results: The experimental results showed that WPT system with adjustable coil can improve the transmission efficiency which proves the theoretical research. At the same time, it has essential reference value for the future research of WPT. Conclusion: In this paper, aiming at the system detuning caused by some other factors, such as the position shift of the load during the wireless power transmission, an adjustable coil is proposed.

Wireless Power Transmission Efficiency for Microwave Rocket Using 28 GHz Gyrotron

2020 ◽  
Vol 57 (3) ◽  
pp. 632-635
Author(s):  
Kohei Shimamura ◽  
Maho Matsukura ◽  
Naoto Ozaki ◽  
Kaisei Miyawaki ◽  
Shigeru Yokota ◽  
...  
Keyword(s):  
Power Transmission ◽  
Transmission Efficiency ◽  
Wireless Power ◽  
Wireless Power Transmission
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