6 Starting and Operating
P-88x/P-08x Piezo Actuator
PZ259E
Version: 1.1.0
33
NOTICE
Destruction of the piezo actuator due to excessive operating frequencies!
An excessive operating frequency can cause thermal and mechanical overloading that destroys
the piezo actuator.
Select the operating frequency so that the following conditions are met:
−
The operating frequency of the piezo actuator does not exceed one third of the
resonant frequency. The resonant frequency according to the data table (p. 47) applies
to unclamped operation without load. In an arrangement with unilateral clamping, the
value must be halved. For loaded piezo actuators that are clamped on one side, see
"Calculating the Maximum Operating Frequency of the Loaded Piezo Actuator" (p. 37).
−
The dynamic forces occurring during operation do
not
exceed the maximum
compressive/tensile stress capacity of the piezo actuator (see "Calculating the Forces
that Occur During Dynamic Operation" (p. 38) and "Compressive/Tensile Stress
Capacity and Preload" (p. 51)).
Reduce the voltage at high operating frequencies to minimize the heating of the piezo
actuator.
If your application involves the operation of a piezo actuator which is not clamped on both
sides, contact our customer service department (p. 45).
NOTICE
Damage due to steep edges in the control signal!
If the actuator does not have a preload, steep edges in the control signal can trigger strong
dynamic forces which damage the piezo actuator. Steep edges can occur, for example, when
digital wave generators are switched on.
Avoid steep edges in the control signal on actuators with low preload.
NOTICE
Damage after reconnecting due to a charged piezo actuator!
The piezo actuator can remain charged when the connecting cable of the piezo actuator is
pulled out of the electronics during operation. Reconnecting a charged piezo actuator to
electronics during operation can cause a mechanical impulse that will damage the piezo
actuator.
Do
not
pull the connecting cable of the piezo actuator out of the electronics during
operation.
If the connecting cable of the piezo actuator was accidentally pulled out of the electronics
during operation:
Discharge the piezo actuator accordingly before reconnecting (p. 39).
Switch off the electronics before you reconnect the piezo actuator.