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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...
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...
The contactless charging system has a wide application range and many advantages for portable consumer electronic products. Wireless power transfer (WPT) includes both the transmitter and the receiver which are in the state of resonance to achieve high efficiency. This paper presents a new multiple overlapping coil transmitter structure which enables the receiver has high efficiency within transmitter...
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