DEVICE AND METHOD TO CONTROL ULTRASONIC PIEZOELECTRIC DRIVE Russian patent published in 2011 - IPC H02N2/06 H01L41/04 F02D41/20 

FIELD: electricity.

SUBSTANCE: device additionally comprises a full resistance adaptation branch installed in parallel with drives, comprising a capacitor (C_R) of feedback, serially connected with a selective breaker (T_R). The breaker (T_R) is controlled both for closing and opening simultaneously with a selective breaker (S_i) of an excited drive so that voltage (V_R) at contacts of an adaptive capacitor (C_R) and voltage (V_Pi) at contacts of the selected drive are equal to zero in the end and at the beginning of injection.

EFFECT: method makes it possible to use a capacitance charge during a series of pulses that cause injection and to avoid sharp discharges in the beginning of the series.

5 cl, 6 dwg