Patent ID: 9088307
Filing Date: 2015-07-21
Classification: H02J,H04B

Abstract:
1. A wireless power transfer system suitable for wirelessly supplying power from an alternating current (AC) power supply to multiple power receivers, comprising: a power transmitter including a resonator circuit with a transmitter coil, and characterized by a resonance frequency, a quasi-resonant frequency band on either side of the resonance frequency, and upper and lower non-resonant frequency bands above and below the quasi-resonant frequency band, where the non-resonant frequency band is characterized by a coil voltage substantially equal to the Power supply voltage; the transmitter circuit configured to transmit power from the power supply through the transmitter coil at a transmitter frequency within the non-resonant frequency band; and multiple power receivers, each including a receiver circuit with a receiver coil, and configured to receive power through the receiver coil transmitted by the transmitter at the transmitter frequency; wherein power is transferred to the multiple receivers substantially simultaneously.