Operation method for piezo-electric oscillation drive - uses actuation frequency in range above preset resonance frequency value

摘要

The method is for the operation of a piezo-electrically actuated oscillation drive for variable loads including operation without load. A valve is selected for the actuation frequency which lies in a frequency range above the pre-set resonance frequency value for the maximum permissible diversion of this oscillation mode. The frequency distance is chosen to ensure that with alternating voltage actuation at this actuation frequency during non load operation only the maximum permissible diversion occurs. This avoids the danger of overload through too great an oscillation amplitude when operated under nonload conditions.