WIRELESS POWER RECEIVING DEVICE, WIRELESS POWER SUPPLYING DEVICE, AND WIRELESS POWER SUPPLYING SYSTEM

摘要

An automatic tuning auxiliary circuit (30b) is coupled to a transmission antenna (20) and injects a correction current (IA) into or extracts the correction current (IA) from the transmission antenna (20). An H-bridge circuit (36) is provided between a first terminal (31) and a second terminal (32) which are coupled to the transmission antenna (20) and is switched at the same frequency as that of a driving voltage (VDRV). A third auxiliary coil (LA3) is provided between the output terminals of the H-bridge circuit (36).