This digest presents a wireless battery charging system that achieves optimal efficiency in real time without the need for communication. The methodology establishes equivalent conditions for optimal performance based solely on measurements from the primary side. The controller on the receiving side adjusts the output power to satisfy load demands, while the primary-side controller satisfies the equivalent conditions to maintain optimal efficiency in real time, even with dynamic coupling coefficients and load variations. Importantly, this approach does not require external communication, additional hardware, or knowledge of parameters such as coil inductance or resonant capacitance on the other side. Experimental results confirm the effectiveness and robustness of the proposed method.
