3 ms·
50kHz ultrasound in the demo. I expect the efficiency to be terrible, which will be the failure point. Do you want to have an always-on 300W device just to avo
by Scaevolus 14y ago
50kHz ultrasound in the demo.
I expect the efficiency to be terrible, which will be the failure point. Do you want to have an always-on 300W device just to avoid finding a cord?
- jurjenh 14y agoRadial power transfer efficiency drops off proportional to r^2, as does omni-directional sound. Unless there is some sort of directional beam established to focus the energy transfer, I imagine these power losses will indeed occur. Note that room effects may well be non-negligible - reflections may mean more power arrives at the receiver than the naive estimate. So I would imagine the ceiling mounted charging station would be a fairly heavy duty outfit with a multi-kW rating if it is to be able to service a large room.