The influence of ferrite on the spiral inductors inductance used for the design of wireless power systems

Author(s):  
Marian Gliga ◽  
Adina Racasan ◽  
Calin Munteanu ◽  
Claudia Pacurar ◽  
Claudia Constantinescu ◽  
...  
Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 2052
Author(s):  
Milena Kurzawa ◽  
Cezary Jędryczka ◽  
Rafał M. Wojciechowski

In this paper, the feasibility of applying a multi-branch equivalent model employing first- and second-order Cauer circuits for the analysis of electromagnetic transducers used in systems of wireless power transfer is discussed. A method of formulating an equivalent model (EqM) is presented, and an example is shown for a wireless power transfer system (WPTS) consisting of an air transformer with field concentrators. A method is proposed to synthesize the EqM of the considered transducer based on the time-harmonic field model, an optimization algorithm employing the evolution strategy (ES) and the equivalent Cauer circuits. A comparative analysis of the performance of the considered WPTS under high-frequency voltage supply calculated using the proposed EqM and a 3D field model in the time domain using the finite element method (FEM) was carried out. The selected results of the conducted analysis are presented and discussed.


Author(s):  
Claudia Pacurar ◽  
Vasile Topa ◽  
Adina Giurgiuman ◽  
Calin Munteanu ◽  
Claudia Constantinescu ◽  
...  

2019 ◽  
Vol 9 (18) ◽  
pp. 3769
Author(s):  
Yi-Hung Liao ◽  
Yue Lin

This paper presents a bidirectional wireless power transfer system for mobile power applications. A novel 2-switch bidirectional wireless power transfer system with dual-side control is proposed for mobile power applications. Although only two switches are adopted, the energy can be transferred from the transmitter side to the receiver side and vice versa. The term bidirectional means that the power-flow is bidirectional and also that the transmitter is also a receiver and the receiver is also a transmitter. The output energy can be easily controlled by the duty ratios of the two switches. Thus, the proposed bidirectional power transfer system uses only one circuit to achieve bidirectional power transfer. Hence, the system cost and volume can be reduced so that the system is small and convenient for mobile power systems, portable and/or wearable electronic devices. A prototype system is constructed and the experimental results verify the validity of the proposed bidirectional wireless power transfer system.


MRS Bulletin ◽  
2008 ◽  
Vol 33 (7) ◽  
pp. 690-696 ◽  
Author(s):  
Takao Someya ◽  
Bholanath Pal ◽  
Jia Huang ◽  
Howard E. Katz

AbstractWe discuss some recent advances in the use of organic semiconductor devices with additional or enhanced functionality beyond simple electrical switching. These include diodes that act as local temperature sensors or that filter reverse-bias currents at tens of megahertz frequency. Transistors are described with a range of sensing and reporting functions, for such properties as pressure, magnetic field, and chemical vapor. Because these devices will likely be employed in arrays and assemblies, we also present concepts of some larger, integrated components such as artificial skin, sensor arrays, and wireless power systems. The common theme of these devices is that they build on an extensive and growing understanding of the parent transistors and diodes, but represent a departure into new physical phenomena and application areas.


Author(s):  
Fatima Alrashdan ◽  
Joshua Chen ◽  
Amanda Singer ◽  
Benjamin Avants ◽  
Kaiyuan Yang ◽  
...  
Keyword(s):  

2017 ◽  
Vol 32 (9) ◽  
pp. 6689-6699 ◽  
Author(s):  
Abhilash Kamineni ◽  
Michael J. Neath ◽  
Grant A. Covic ◽  
John T. Boys

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