scholarly journals Wireless power transfer through metal using inductive link

2019 ◽  
Vol 10 (4) ◽  
pp. 1906
Author(s):  
Tuan Anh Vu ◽  
Chi Van Pham ◽  
Anh-Vu Pham ◽  
Christopher S. Gardner
Keyword(s):  
Power Transfer ◽  
Wireless Power ◽  
Inductively Coupled ◽  
Stroke Width ◽  
Measurement Results ◽  
Power Transfer Efficiency ◽  
Collector Efficiency ◽  
Helical Coils ◽  
Efficient Power ◽  
Class E

<span style="color: #000000; font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">This paper presents a highly efficient power transfer system based on a co-design of a class-E power amplifier (PA) and a pair of inductively coupled Helical coils for through-metal-wall power transfer. Power is transferred wirelessly through a 3.1-mm thick aluminum barrier without any physical penetration and contact. Measurement results show that the class-E PA achieves a peak power gain of 25.2 dB and a maximum collector efficiency of 57.3%, all at 200 Hz. The proposed system obtains a maximum power transfer efficiency of 9% and it can deliver 5 W power to the receiver side through the aluminum barrier.</span>

scholarly journals Wireless power and data transfer through carbon composite using a common inductive link

2020 ◽  
Vol 11 (3) ◽  
pp. 1441
Author(s):  
Tuan Anh Vu ◽  
Chi Van Pham ◽  
William Tran ◽  
Anh-Vu Pham ◽  
Christopher S. Gardner
Keyword(s):  
Data Transfer ◽  
Data Communication ◽  
Carbon Composite ◽  
Power Transfer ◽  
Wireless Power ◽  
Inductive Link ◽  
Ac Power ◽  
Half Duplex ◽  
Power Transfer Efficiency ◽  
Helical Coils

This paper presents the design and development of an integrated wireless power transfer and data communication system. The power and data transfer share a common inductive link that consists of two identical Helical coils placed on both sides of a carbon composite barrier. Power and data are transferred simultaneously through a 5-mm thick carbon composite barrier without any physical penetration or contact. Power transfer measurements show that the system can deliver 9.7 AC power to the receiving coil with a power transfer efficiency of 36% through the carbon composite barrier. The system achieves a bidirectional half-duplex data communication with the data rate of unit 1.2kbit/s.

scholarly journals Design of Wireless Power and Information Transfer Systems Considering Figure of Merit for Information

2020 ◽  
Vol 20 (4) ◽  
pp. 241-247
Author(s):  
Gunyoung Kim ◽  
Bomson Lee
Keyword(s):  
Information Transfer ◽  
Figure Of Merit ◽  
Near Field ◽  
Power Transfer ◽  
Wireless Power ◽  
Resonant Structures ◽  
Inductively Coupled ◽  
Electromagnetic Simulations ◽  
Power Transfer Efficiency ◽  
System Configurations

Inductively coupled resonant wireless power transfer (WPT) systems can be used as a wireless power and information transfer (WPIT) system by properly adding the function of varying Rx loads. A new metric for the figure of merit for information transfer from Rx to Tx is proposed as the ratio of Tx input impedances for the Rx shorted and optimum loads to systematically assess the information transfer. While most of WPT and near-field communication (NFC) devices have been adopted for very short distances between Tx and Rx, this work shows that the WPIT systems using inductively coupled resonant structures with high Q-factor coils enable much longer working distances with the best power transfer efficiency and information transfer capability. Several design examples show that the newly proposed figure of merit for information transfer is an essential metric in the understanding and design of WPIT systems. The theory is validated with circuit and electromagnetic simulations for various system configurations.

Inductively coupled wireless power transfer with class-E2 DC-DC converter

2013 ◽  
Author(s):  
Tomoharu Nagashima ◽  
Kazuhide Inoue ◽  
Xiuqin Wei ◽  
Elisenda Bou ◽  
Eduard Alarcon ◽  
...  
Keyword(s):  
Wireless Power Transfer ◽  
Power Transfer ◽  
Wireless Power ◽  
Inductively Coupled ◽  
Class E

scholarly journals Maximizing Transfer Efficiency with an Adaptive Wireless Power Transfer System for Variable Load Applications

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1417
Author(s):  
Jung-Hoon Cho ◽  
Byoung-Hee Lee ◽  
Young-Joon Kim
Keyword(s):  
Loading Condition ◽  
Wireless Power Transfer ◽  
Input Voltage ◽  
Transfer Efficiency ◽  
Maximum Efficiency ◽  
Variable Load ◽  
Power Transfer ◽  
Wireless Power ◽  
Variable Loading ◽  
Power Transfer Efficiency

Electronic devices usually operate in a variable loading condition and the power transfer efficiency of the accompanying wireless power transfer (WPT) method should be optimizable to a variable load. In this paper, a reconfigurable WPT technique is introduced to maximize power transfer efficiency in a weakly coupled, variable load wireless power transfer application. A series-series two-coil wireless power network with resonators at a frequency of 150 kHz is presented and, under a variable loading condition, a shunt capacitor element is added to compensate for a maximum efficiency state. The series capacitance element of the secondary resonator is tuned to form a resonance at 150 kHz for maximum power transfer. All the capacitive elements for the secondary resonators are equipped with reconfigurability. Regardless of the load resistance, this proposed approach is able to achieve maximum efficiency with constant power delivery and the power present at the load is only dependent on the input voltage at a fixed operating frequency. A comprehensive circuit model, calculation and experiment is presented to show that optimized power transfer efficiency can be met. A 50 W WPT demonstration is established to verify the effectiveness of this proposed approach.

scholarly journals Synchronous Push-Pull Class E Rectifiers with Load-Independent Operation for Megahertz Wireless Power Transfer

2020 ◽  
pp. 1-1
Author(s):  
Xiaosheng Huang ◽  
Yi Dou ◽  
Shuyi Lin ◽  
Yuan Tian ◽  
Ziwei Ouyang ◽  
...  
Keyword(s):  
Wireless Power Transfer ◽  
Power Transfer ◽  
Wireless Power ◽  
Class E
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