6 Starting and Operating
30
Version: 1.1.1
PZ245E
P-2x5 Piezo Actuator
6.2
Determining the Operating Parameters
6.2.1
Overview of Limiting Factors
Limiting factors for the operation of the piezo actuator:
Resonant frequency:
The operating frequency must
not
exceed one third of the resonant frequency of the
loaded piezo actuator:
−
Maximum operating frequency of the unloaded piezo actuator: Refer to "Maximum
Ratings" (p. 43).
−
Maximum operating frequency of the loaded piezo actuator: Refer to "Calculating
the Maximum Operating Frequency of the Loaded Piezo Actuator" (p. 31).
Maximum push/pull force capacity (p. 41):
The mass of the load to be moved and the operating frequency of the piezo actuator
must be selected so that any dynamic forces generated during operation do not exceed
the maximum push/pull force capacity of the piezo actuator. See "Calculating the
Forces that Occur During Dynamic Operation" (p. 32).
Maximum permissible operating temperature of the piezo actuator (p. 44):
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. 43).
When cooling measures (p. 25) are used, the limit values for the operating frequency,
operating voltage and operating time increase. The use of a temperature sensor (p. 13)
can prevent the piezo actuator from overheating.
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. 32).
The output current of the electronics does not exceed the maximum power
consumption of the piezo actuator. See "Maximum Ratings" (p. 43).