The characteristic analysis of magnetically coupled resonant wireless power transmission based on SS compensation structure

Lumped parameter model was used to explain the working principle of magnetically coupled resonant wireless power transmission (MCR-WPT) system. A resonant magnetic coupling two-coil model with Series-Series (SS) structure was established based on the equivalent circuit theory. The mathematical expression of output power and transmission efficiency of the MCR-WPT system was obtained. The relationship between transmission efficiency and system frequency was analyzed, as well as the relationship between transmission efficiency and transmission distance. A magnetically coupled resonant WPT system was built. The experimental results verified the theoretical analysis.