A resonant power supply (300) is provided for ozone generation. The power supply (300) advantageously reduces costs and increases reliability of ozone generators. The power supply (300) provides a first AC voltage from a power source (320) to a resonant circuit (330) and the resonant circuit (330) provides a second AC voltage to the ozone generating unit (110), the second AC voltage being greater than the first AC voltage. A controller (340) for the power supply (300) that adapts to the resonance of the circuit to provide control with a wide tolerance for the high Q circuit component values of the circuit.
