System for generating acoustic ultrasonic vibration with improved amplitude control

A system for generating an ultrasonic acoustic vibration, comprising:

• a generator for generating an alternating electrical voltage U with a frequency f,
• a converter for converting the alternating electrical voltage into an ultrasonic acoustic vibration, and
• a regulation device which detects the vibration amplitude Aist of the ultrasonic vibration and compares it with a desired vibration amplitude Asoll and changes a manipulated variable with the aim of approximating the detected vibration amplitude Aist to the desired vibration amplitude Asoll,
• wherein the generator has a frequency control module with a frequency control input which determines the frequency f of the alternating voltage U to be generated as a function of a signal present at the frequency control input,
• wherein a drive control unit is provided which converts an input signal into a manipulated variable signal, the desired vibration amplitude Asoll being provided as the input signal, and the manipulated variable signal being connected to the frequency control input,
• wherein the frequency of the electrical alternating voltage is used as the manipulated variable, and
• wherein the regulation device outputs a control variable signal which is connected to the frequency control input.