DEVICE FOR CONTROLLING AN ULTRASONIC PIEZOELECTRIC ACTUATOR

摘要

The invention relates to a control device comprising: - a first stage (1) for raising DC voltage (Vbatt) to generate an intermediate voltage (Vinter), - a second stage (2) which is a storage stage powered by the first stage (1) comprising a first storage means (20) for storing the intermediate voltage (Vinter), - a third stage (3) for modulating the intermediate voltage (Vinter) to generate an AC excitation voltage (VE) for energizing an ultrasonic piezoelectric actuator (4). According to the invention, the second stage (2) comprises: - a second storage means (21) mounted in parallel with the first storage means (20) and designed to store the intermediate voltage (Vinter), - a first switching means (22) to command storage of the intermediate voltage (Vinter) by the second storage means (21) down to a low voltage setpoint (VBT) such that VBT inter.