Multilayer actuator i.e. piezoelectric motor, for window lifting drive of motor vehicle, has electrode planes comprising two electrode sections controlled independent of each other, where sections are arranged on collecting electrodes

摘要

The actuator (1) has a piezoelectric plane (2), and an electrode planes (3, 6) comprising two electrode sections (4, 5) controlled independent of each other. The electrode sections are arranged on collecting electrodes (7, 9, 10) in a distributed manner. The electrode sections are attached to the collecting electrodes and aligned with each other in a direction of a longitudinal extension of the actuator. Piezoelectric disks are held together at the electrode planes by using an external pretensioning unit. A central passage opening is provided at a spring.