The two most important key performance indictors of piezo stack actuator are stroke and force. These data are directly related with the size of the stack:
The capacity C and the maximum operating voltage U are the key electrical data and is directly related with the size of the stack. In the following table key data are summarized and represent the range of actuator stacks.
Symbol |
Meaning |
Minimum |
Maximum |
Special Design |
X |
displacement |
2 µm |
100 µm |
1 µm - 400 µm |
Fb |
blocking force |
200 N |
4 kN |
50 kN |
A |
base area |
2 x 3mm2 |
10 x10 mm2 |
25 kN |
s |
active stress |
3500N/cm2 |
|
|
S |
active strain |
0,1% |
0,2% |
|
L |
length |
2 mm |
100mm |
1 mm, 400 mm |
C |
capacity |
typ. 3 mF/cm3 per active stack volume |
|
|
U |
voltage |
-30 to +150 V |
0 to 150 V |
300 V, 600 V |
T |
temperature |
-25 oC |
+ 85 oC |
cryo |
rH |
humidity |
< 60% rH |
100% |
To start with the design, consider the standard actuator program as a first reference and compare the performance data:
The analysis could be structured in a three-step approach:
Spring Force Load
Spring-Mass Load
Performance made of Passion.
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Piezotechnics GmbH
Germany