We propose a highly efficient wireless power transfer system with automatic impedance tuning control for practical applications with variable operating distances. Under misalignment between the transmitting and receiving antenna or any operating distance, the proposed distance-adaptive WPT system achieves an improved PTE of maximum 160% by minimizing the reflection coefficient in the transmitting system. It can be useful in wireless charging without the response of the portable receiving device.

[System Specification] 

Freq. band : 13.56 MHz 

Distance : more than 00 cm (Related to the coil size)

Power Transfer Efficiency : more than 50% (Related to the Q of the coils)

Characteristics : Automatic tuning algorithm

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Usage : Wireless charging for mobile device or EVs.