Abstract: An electrical machine for a motor vehicle, including a stator and a rotor mounted on the stator such that it is able to rotate by a rotation shaft and a plurality of rolling modules. At least one rolling element of at least one rolling module includes a “main” piezoelectric transceiver configured to transmit an ultrasonic supply signal, the electrical machine including a sensor mounted inside the rotor.

Abstract: An electric machine for a motor vehicle, includes a stator and a rotor mounted on the stator movably in rotation by a rotary shaft and a plurality of bearing modules>A fixed element of at least one bearing module includes a “main” piezoelectric transceiver configured to transmit an ultrasonic power supply signal, and the electric machine includes a sensor mounted inside the rotor.

Abstract: A device for measuring a parameter, including a main module and a remote module. The main module includes a control stage and a piezoelectric transmitter that is configured to transmit ultrasonic signals. The control stage being configured to electrically power the piezoelectric transmitter and to command transmission of signals by the piezoelectric transmitter. The remote module includes a piezoelectric receiver, a sensitive element configured to measure the parameter and to generate a measurement signal, and a measurement stage configured to collect and store the energy of the signals received by the piezoelectric receiver with a view to electrically powering the sensitive element, to receiving a measurement signal generated by the sensitive element, to extracting from said received measurement signal the values of the measured parameter and to commanding transmission of signals containing the extracted parameter values.