MULTI-LEVEL INVERTER FOR WIRELESS POWER TRANSMISSION

Described herein are controllers configured for a wireless power system and methods for such controllers and systems. The controller includes a control module configured to generate a first control signal having a first voltage level and a second control signal having a second voltage level and a modulator configured to (a) receive a signal representative of the output current and (b) generate carrier signals based on the output current. When a first carrier signal is greater than the first voltage level, a first gate drive signal for a first switch is high and when a second carrier signal is greater than the second voltage level, a second gate drive signal for a second switch is high, thereby driving an inverter to output a multi-level voltage having a first output level based on the first drive signal and a second output level based on the second drive signal.