CIRCUIT FOR SUPPLYING A PIEZOELECTRIC MOTOR

摘要

Circuit for supplying a piezoelectric motor (M) comprising a rotor (1) frictionally driven by a stator energized by a piezoelectric element (3) connected to two electrodes (11 and 12) supplied by two high frequency voltages (V1') and (V2') of the same amplitude, and phase shifted by approximately 90 DEG . According to the invention, the supply circuit comprises a single high frequency alternating supply source (V) and an adapting means (Q) connected to the alternating supply source (V) and to two electrodes (11 and 12) energizing the piezoelectric element (3) and generating both voltages (V1') and (V2'). The invention is for use in piezoelectric motors.