METHOD AND CIRCUITRY FOR CONTROLLING A TRANSMITTER OF A WIRELESS POWER TRANSFER SYSTEM

A method of reducing a duty cycle of a switching element of an inverter of a transmitter of a wireless power transfer system to reduce electromagnetic interference (EMI) of a field generated by the transmitter is described. Circuitry, a transmitter and a wireless power transfer system are also described. The method comprises reducing a period of time a switching element of the inverter is active during each cycle of an operating frequency of the inverter thereby reducing the duty cycle of the switching element.