Calculating The Effective Mass - PI P-88 Series User Manual

6 Starting and O
Maximum compressive/tensile stress capacity (p. 51):
The mass of the load to be moved, the preload, and the operating frequency of the piezo
actuator must be selected so that 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).
Maximum permissible operating temperature of the piezo actuator (p. 52):
The greater the operating frequency, the operating voltage (peak-to-peak), and the capacitance
of the piezo actuator, the greater the thermal power generated in the piezo actuator. The
operating frequency, operating voltage and operating time must be selected so that the
maximum permissible operating temperature of the piezo actuator is not exceeded. For the
maximum permissible operating frequency without cooling, see column B of the table in
"Maximum Ratings" (p. 50).
When cooling measures are used, the limit values for the operating frequency, operating
voltage and operating time increase.
Peak and average output current of the electronics (p. 12) used:
The electronics must be selected so that they fulfill the following requirements:
The electronics can provide the required current. See "Calculating the Power

Requirement for Sinusoidal Operation" (p. 38).
The output current of the electronics does not exceed the maximum power

consumption of the piezo actuator. See "Maximum Ratings" (p. 50).
6.2.2

Calculating the Effective Mass

Figure 16:
36 Version: 1.1.0
Calculation of the effective mass of a unilaterally clamped piezo stack actuator without load
(left) and with additional load (right).
PZ259E P-88x/P-08x Piezo Actuator