Instructions For Using Piezoelectrical Elements And Power Supplies - piezosystem 12V40 Series Instruction Manual

4. Instructions for using piezoelectrical elements and power
supplies

Piezoelectric actuators from piezosystem jena are controlled by voltages of
up to 150 V. These values can be quite hazardous. Therefore, read the
installation instructions carefully. Only authorized personnel should handle
the power supply.

After transportation, piezoelectric actuators should be allowed to adapt to
room temperature for approximately 2 hours before being switched on.

Piezoelectric actuators are made from ceramic materials with and without
metallic casings. The piezo-ceramic is a relatively brittle material. This
should be noted when handling piezoelectrical actuators. All piezo elements
are sensitive to bending or shock forces.

Due to the piezoelectric effect, piezo actuators can generate electrical
charges by changing the mechanical load or the temperature, or by such
actions as those described above.

Piezoelectric actuators are able to work under high compressive forces, but
only actuators with pre-load can be used under tensile loads (these tensile
forces must be less than 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) can cause damage to
the actuator.

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 the specified values cited below.

With increasing temperature, up to the Curie temperature (usual values
approx. 140°C - 250°C), the piezoelectric effect disappears.

Piezoelectric actuators, such as stacks or various tables, work electrically as
a capacitor. These elements are able to store electrical energy over a long
period (up to some days) and the stored energy may be dangerous.

If the actuator remains connected to the drive electronics, it is discharged
within a second after shutdown and quickly reaches harmless voltage
values.

Piezo actuators can only generate voltages by warming or cooling. The
discharge potential should not be ignored due to the inner capacitance. This
effect is insignificant at usual room temperature.

Piezo actuators from piezosystem jena are adjusted and glued. Any
opening of the unit will cause misalignment or possible malfunction, and the
guarantee will become invalid.

Please contact piezosystem jena, or your local representative, if there are
any problems with your actuator or power supply.
Caution! Shock forces may damage the built-in ceramic element. Please avoid
such forces, and handle the units with care, otherwise the guarantee will
become invalid.
Tel: +49(0)3641/66880 • Fax +49(0)3641/668866 • • www.piezosystem.de
info@piezojena.com
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