Principles of Piezoelectric Actuators

Basic knowlede of Piezoelectric Actuators
Piezoelectric Actuators

Features  from  utilizing solid transformation by driving voltage
  1. High accuracy 
  2. Quick response 
  3. High keeping suspension
  4. Low consumption
  5. Electromagnetic noiseless 
  6. High-density mounting is possible by  small size
  7. Simple structure


Piezoelectric Actuators

Vertical displacement X3=d33Vn
Horizontal displacement X1=d31VL/t

d33,d31: the piezoelectric constant , d33=-2d31
E: Impressed electric field
V: Impressed voltage (E=V/t)
n: Number of layer
t: Thickness per layer
L: Length

The displacement is defined by the piezoelectric constant ,
by the shape of the element and by the impressed electric field.
d33type and d31type image gif animation