Search Results

Now showing 1 - 4 of 4

Some of the metrics are blocked by your
consent settings
Low loss magnetic design for wireless power transfer
(2015-10-01)
Zenkner, Heinz
;
Khan-Ngern, Werachet
An electromagnetically power transmission system to transmit power at a high power density and with a high efficiency under consideration of EMC aspects is proposed. Product requirements like size and weight are taken into account. The system uses the resonance wave coupling and an impedance adaption for multi-stage conversion is implemented to optimize efficiency and impedance matching. The transferred power is up to 180 W at a frequency of 6.78 MHz with a distance between 30 mm and 80 mm. The results show that an efficiency up to 88% can be achieved. The transmitted power density reaches up to 14 W/cm<sup>2</sup>. It is shown that due to the evanescent wave resonance coupling the system emits only very little radiation and thus is capable to keep EMC/EMF regulations. Wireless power transfer applications such as electric vehicle charging and wireless power drive for LED lighting through a wall are demonstrated.
Some of the metrics are blocked by your
consent settings
The study of wireless power transmission under water-to-air mode
(2015-10-01)
Khan-Ngern, Werachet
;
Zenkner, Heinz
This research proposes the preliminary study whether the power transmission is possible or not. The wireless power transmission using particular resonance technique with series resonance for transmission and parallel resonance for receiver has been proposed. The study is focused on the wireless power transmission on waterto- air mode on reversed osmosis water and various salt water concentrations. The transmitted power is up to 7 W at a frequency of 6.78 MHz across a distance in the range between 10 mm to 60 mm has been demonstrated. Finally, the effect of water type and the percentage of salt concentration on wireless power transmission attenuation are presented and analyzed.
Some of the metrics are blocked by your
consent settings
Planar array antenna for WPT system at 2.4 GHz
(2015-01-28)
Pookkapund, Khanet
;
Boonying, Komkris
;
Dentri, Sitthichai
;
Phongcharoenpanich, Chuwong
This paper presents a rectifying antenna (rectenna) which can harvest the wireless power at 2.45 GHz band. The proposed antenna is designed to convert the wireless RF signal into DC power. The antenna structure consists of four printed dipoles located perpendicularly to one another to combine the pattern and increase the gain. The compact antenna radiates unidirectional pattern with the high gain. The rectifying circuit part is designed based on voltage diode with stub matching circuit.
Some of the metrics are blocked by your
consent settings
Design of planar rectangular spiral antennas for the wireless vehicle battery charging system
(2013-12-01)
Phaebua, K.
;
Torrungrueng, D.
;
Phongcharoenphanich, C.
A design of planar rectangular spiral antennas for the wireless vehicle battery charging system operating at 13.56 MHz is presented in this paper. The proposed antennas are designed with low-cost, low-complexity and low-profile constraints. The study is performed by analyzing the power transmission efficiency of the spiral antennas via scattering parameters and associated reflection coefficients. Moreover, the misalignment between the transmitting and receiving antennas and effects of a car structure on the power transmission efficiency are investigated. It is found that the misalignment and the car structure strongly affect the power transmission efficiency. © 2013 IEEE.

KMITL

Browse

Filters

Settings

Sort By

Results per page

Search Results