Inductive charger with up to 30 mm range

Good day,

I would like to commission a design of an inductive charger, which will be able to transmit current over a distance of at least 30 mm. The device is to be powered by 12 or 24 V DC, the issues of coil sizes and device operating parameters are arbitrary, the only element to which the design should be adjusted is the receiving coil, which we already have selected.