POWER SUPPLY DEVICE, POWER SUPPLY SYSTEM, AND ELECTRONIC DEVICE

摘要

Provided are a power supply device, power supply system, and electronic device that can control transmission inefficiency according to device position when carrying out electric power transmission between devices by using a magnetic field. The power supply device is provided with a power transmission coil for carrying out electric power transmission using a magnetic field, and a power transmission unit having an auxiliary resonator unit that includes one or a plurality of resonators. The resonators have auxiliary coils wound so as to form a crevice in a region in at least one part.