. instructions for using piezo electrical elements and power supplies
•Pie oelectric actuators from piezosystem jena are controlled by voltages up to
150V. These values can be quite ha ardous. Therefore read the installation
instructions carefully and only authori ed personal should handle the power supply.
•After transportation, pie oelectric actuators should be allowed to adapt for
approximately 2 hours to the room temperature before being switched on.
•Pie oelectric actuators are made from ceramic materials with and without metallic
casings. The pie o-ceramic is a relatively brittle material. This should be noted
when handling pie o electrical actuators. All pie o-elements are sensitive to
bending or shock forces.
•Due to the pie oelectric effect pie o-actuators can generate electrical charges by
changing the mechanical load or the temperature or such actions described above.
•Pie oelectric actuators are able to work under high compressive forces. Only
actuators with a pre-load can be used under tensile loads (these tensile forces must
be less then the pre-load, given in the data sheet).
•Please note that the acceleration of the ceramic material (e.g., caused by fall down,
discharging or high dynamic application) will occur.
•After excitation of the actuators by a voltage in the upper control range, the ceramic
will move and generate an opposite high voltage after disconnection.
•Heating of the ceramic material will occur during dynamic operation and is caused
by structure conditional loss processes. This may cause failure if the temperature
exceeds specified values cited below.
•The pie oelectric effect disappears at temperatures above the Curie temperature
(usual values approx. 140...250°C).
•Pie oelectric actuators such as stacks or other devices work electrically as a
capacitor. These elements are able to store electrical energy over a long period of
time (up to some days) and the stored energy may be dangerous.
•If the actuator remains connected to the drive electronics, it is unloaded within a
second after shutdown and quickly reaches harmless voltage values.
•Pie o actuators can generate voltages by warming or cooling only (caused by the
longitudinal change). The discharge potential should not be ignored due to the inner
capacitance. This effect is insignificant at usual room temperature.
•Pie o actuators from piezosystem jena are adjusted and glued. Any opening of the
unit will cause misalignment or possible malfunction and the guarantee will be lost.
•Please use only original parts from piezosystem jena.
•Please contact piezosystem jena or your local representative, if there are any
problems with your actuator or power supply.
19
piezosystem jena GmbH
Pruessingstrasse 27 • 07745 Jena
Tel ++49 3641 66 88 – 0 • Fax –49 3641 66 88 – 66 • e-mail: info@pie ojena.com • http://www.pie ojena.com
