| 摘要 |
Provided are a power receiving device and a power transmission system that can improve power supply balance. The power receiving device comprises: a first secondary-side resonance coil that receives power from a primary-side resonance coil by magnetic resonance; a rectification circuit that performs full-wave rectification of AC power inputted from the first secondary-side resonance coil; a smoothing circuit connected to the output side of the rectification circuit; a pair of output terminals connected to the output side of the smoothing circuit; a switch serially inserted in a line between the rectification circuit and the smoothing circuit for switching connection states; and a drive/control unit that drives the switch with a PWM drive pattern determined by a frequency equal to or less than the frequency of magnetic resonance and by a duty ratio established on the basis of a first power reception efficiency of the first secondary-side resonance coil, a first rated output of a first load connected to the pair of output terminals, a second power reception efficiency of a second secondary-side resonance coil of another power receiving device that receives power from the primary-side resonance coil by magnetic resonance with the primary-side resonance coil, and a second rated output of a second load to which power is supplied from the other power receiving device. |
