Re: ultrasonic power transmission Yes it is possible to transfer power by ultrasound without too high losses. Piezoelectric transformers, where power is transmitted by a ultrasonic field instead of an magnetic field has been known for a long time. One of the first attempts were made in the 60'ies by L.D. Rosen. Transformers based on his design is used as high voltage supply (1 kV, 5 mA) for the backlight in notebook computers. More resent designs have been used for supplying low voltage, high currents (12 V, 1 A) as well. Efficiency is between 95-99,? %
: Does anyone know if it is possible to tranmit power with ultrasons : (about 20W) and to convert it for example in electrical energy ? : Would the losses be important ? . : Regards, . : Christophe Greffe .