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Wireless power transfer (WPT) is widely used in portable devices with the advantage of flexibility and convenience. This paper proposes a cooperative multiple coil matrix transmitter (CMCM) structure. This design allows the mobile device receiver coil to be freely placed above the wireless charging pad which can select the appropriate transmitter coils to activate according to the location of the...
Wireless power transfer (WPT) is widely used in portable devices with the advantage of flexibility and conveniences. This paper aims to design a cube transmitter structure, which generates a spatially focused magnetic field providing effective power transfer. The phase shift in multiple coils has been optimized for maximum power transfer efficiency and free positioning in the charging spatial domain...
Inductive Power Transfer (IPT) techniques are gaining more and more interest in wireless power systems. The knowledge of the coupling factor of transmitter (TX) and receiver (RX) coil is a crucial, but mostly during operation not available parameter for such systems. In this manuscript a novel method to determine the coupling factor by measuring the self-resonating frequency of the postringing signal...
Wireless power transfer (WPT) system is to provide power transmission via near field magnetic resonant coupling between the transmitter and the receiver with the same frequency. In WPT system the most important parameter is efficiency. This paper proposes different cooperative transmitter matrixes with multiple coils. This design enables receiver coil to be freely placed and charged above the wireless...
In order to develop a high power transmission efficiency for an Inductive Power Transfer (IPT) system especially the parameters of the receiver (RX) coil have to be analyzed in detail. This becomes essential, when the RX coil is part of a medical implant and dramatically limited in size. The parameters, which completely describe a coil, are its inductance and ohmic losses. Both values are just dependent...
In this manuscript the authors discuss the issues of designing and implementing an H-Bridge circuit with respect to small switching losses, minimal hardware afford and maximal flexibility of excitation and control. The H-Bridge is targeted for a biomedical Wireless Power Transfer (WPT) application, where the receiver (RX) is small compared to the transmitter (TX) and, thus, negligible. Resonance is...
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