Wireless Battery Charger based on Sensorless Control for E-bike Station

The paper suggests a battery wireless charging control for e-bike sharing service implemented at University `Federico II' of Naples. The wireless battery charging system is based on Series-Series Resonant Converter (SS-RIPT) tracking of battery Constant Voltage (CV)/Constant Current (CC) mode. State of charge identification has been implemented using primary transformer current measurement. A Fourier frequency domain methodology has been implemented in order to identify the secondary coil current of resonant transformer and the battery voltage. Numerical results have been carried out in order to validate the identification procedure.