6 Starting and Operating
P-88x.x5 Piezo Actuator
PZ266E
Version: 1.1.0
25
NOTICE
Destruction of the piezo actuator due to overheating!
During the operation of the piezo actuator, dielectric losses that are converted into heat
energy occur in the piezo ceramic due to ferroelectric polarization processes. Heat dissipation
to the outside is reduced due to the inert gas filling of the piezo actuator. The thermal energy
that is generated can overheat and destroy the piezo actuator, especially in dynamic operation.
The maximum operating temperature can already be exceeded inside the piezo actuator, when
the temperature measured on the outside is still within the permissible range.
If your application involves dynamic operation, contact our customer service department
(p. 37).
Adjust the operating voltage, operating frequency, and/or operating time so that the
maximum operating temperature of the piezo actuator is not exceeded; see "Ambient
Conditions and Classifications" (p. 41), "Maximum Ratings" (p. 40), and "Determining the
Operating Parameters" (p. 26).
Cool the piezo actuator. Liquid cooling is only possible under certain conditions. If liquid
cooling is to be used, contact our customer service department (p. 37).
NOTICE
Destruction of the piezo actuator due to rapid cooling or heating!
Cooling down or heating up too quickly leads to a thermomechanical load that can destroy the
piezo actuator.
Allow the piezo actuator to cool down or warm up slowly.
NOTICE
Uncontrolled oscillation!
Oscillation can cause irreparable damage to the P-88x.x5. Oscillation is indicated by a humming
noise and can be caused by the following:
A change in the load and/or dynamics requires the servo control parameters to be
adjusted.
The P-88x.x5 is operated near to its resonant frequency.
If you notice oscillation:
In closed-loop operation, switch off the servo mode immediately.
In open-loop operation, stop the P-88x.x5 immediately.
INFORMATION
The positive direction of motion (p. 10) corresponds to the expansion direction of the piezo
actuator when a positive voltage is applied.