Patent ID: 9419199
Filing Date: 2016-08-16
CPC Classification: H01L,H02N

Claim Text:
1. An actuator system comprising a control arrangement and an actuator, wherein the actuator, which is expandable in a predefined direction, comprises: piezoelements arranged in a stacked fashion; first and second internal electrodes arranged alternately between the piezoelements; a first external electrode, which is electrically conductively connected to the first internal electrodes; a second external electrode, which is electrically conductively connected to the second internal electrodes; and a plurality of actuator sections comprising a first actuator section, which is arranged in the predefined direction relative to a second actuator section, wherein the second external electrode comprises separate electrode segments, which are electrically conductively connected in each case to the second internal electrodes in one of the actuator sections or in a group of the actuator sections, wherein the control arrangement is configured to apply a first control signal can be applied to the first actuator section or a first group of actuator sections using a time delay, and to apply a second control signal in a time-shifted manner to the second actuator section or a second group of actuator sections, in such a way that the control arrangement, based on the time delay, applies the first control signal to the first actuator section or the first group of actuator sections after applying the second control signal to the second actuator section or the second group of actuator sections, and wherein the time-shift depends on the velocity of sound in the actuator, so that elastic partial waves generated by control signals during the expansion of the actuator in the respective actuator sections or groups of actuator sections are superimposed.