Hi, I need to transfer electricity to components that are rotating on a shaft but the power source is stationary with respect to the rotating shaft. the electricity is AC. So I had an idea of a rotating capacitor , two round plates , one stationary then a stationary dielectric attached to the plate and then the other rotating and attached to a rotor.the other end of the shaft would be the return path with a conductive bearing or something similar. Assuming the plates , especially the rotating one have good geometry and and tolerances are kept close , could I achieve significant power transfer through such a capacitor if I use high frequency AC sine or square waveform ? Also since the rotating plates are round the charge density and potential difference across the capacitor doesnt change whether the plates are rotating or not right ?