Piezoeletric voltage generation calculation

  • Thread starter Nap04011
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  • #1
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Main Question or Discussion Point

Hey,

I was wondering if someone could post or create/explain a simple piezoeletric problem in which a stress acts on a piezo material and creates a voltage.

I want to be able to understand how to caculate the voltage generated and current created.

Thanks for any help
 

Answers and Replies

  • #2
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Try here, under applications.
 
  • #3
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Thanks Timmay!
 
  • #4
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Ok real quick so I followed throught it and understand

But when the start working the problem they say

d33= 25 pC/N

but when the work the problem the use 10.10^-10 for their e value to C???
shouldnt that e be 25pC/N????
 
  • #5
122
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The first expression calculates the capacitance C of the sensor. Epsilon is the electrical permittivity of the material, A is the area, t thickness. C'' is the capacitance per unit area.

[tex]C^{''} = \frac {\epsilon} {t}[/tex]

[tex]C = \frac {\epsilon A} {t}[/tex]

[tex]C = 10E^{-10}\times\frac {1E^{-2}*1E^{-2}} {100E^{-6}}[/tex]

[tex]C = 100 pF[/tex]

To calculate the charge generated under a load of 10 N:

[tex]Q = 25 pC/N \times 10 N = 250 pC[/tex]

Knowing the relationship between voltage, charge and capacitance:

[tex]V = \frac {Q} {C}[/tex]

[tex]V = \frac {250 pC} {100 pF}[/tex]

[tex]V = 2.5 V[/tex]

Make a bit more sense?
 
Last edited:
  • #6
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Where exactly did you find these calculations. Im currently in a research team in highschool working on developing piezoelectric nanofibers.
 

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