Simulation of a switched series-resonant receiver for wireless power transfer applications

There has recently been considerable renewed interest in commercial development of wireless power transfer (WPT) through magnetically-coupled resonant circuits. One of the problems inherent in WPT is the large variation in power delivered to the load if the flux-coupling coefficient from primary to secondary resonators is allowed to vary. Power delivery may be regulated by either supply-side or load-side regulation, but load-side regulation is less complex as it does not require feedback from the load to the source. The paper analyzes through state equations a proposed method of load-side regulation and develops and validates a linearized model.