Resonant inductive converter

A work-surface, comprising:

• a non-ferromagnetic member having a top surface and a bottom surface;
• and
• a system that converts between electromagnetic configurations for power transfer from the bottom surface to the top surface, the system including:
• an inductive power supply defining a driver;
• a primary resonator coil powered by the driver;
• a secondary resonator coil, the secondary resonator coil being electromagnetically coupled to the primary resonator coil;
• a secondary inductive coil to transfer power to a wirelessly powered device, the secondary inductive coil being electrically connected to the secondary resonator coil;
• and
• an electromagnetic shield positioned to provide electromagnetic shielding of the secondary inductive coil from the secondary resonator coil.