Power Balance of Capacitive Wireless Power Transfer

The power balance analysis of the capacitive wireless power transfer was conducted in a general manner. The circuit model of a capacitive wireless power transfer chain was presented. The derivation of the power transfer efficiency through the chain in question as well as the active power delivered to the appliance terminating this chain was shown. The case of the maximal efficiency was treated and conditions for this optimum were found. The appliance power corresponding to the maximal efficiency was also expressed. For the optimal conditions, the appliance power was written in the normalized form, which enabled to express it as a function of single variable in the same way as the efficiency.