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EURASIP Journal on Wireless Communications and Networking
Fig. 3 | EURASIP Journal on Wireless Communications and Networking

Fig. 3

From: An improved three-coil wireless power link to increase spacing distance and power for magnetic resonant coupling system

Fig. 3

Schematic of normalized energy exchanging. Normalized energy exchanging is solved by coupled mode method. In loose coupling mode, the power of the system quickly attenuates to zero. In weak coupling mode, the rate of energy exchange between the transmitter and the receiving end is very small; it means that the transmitting efficiency is low. In strong and tight coupling mode, the system will work in a highly efficient transmission and low-loss state. a Loose coupling mode. b Weak coupling mode. c Strong and tight coupling mode

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