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How to calculate power output in piezoelectric material?

  1. Mar 10, 2013 #1

    I want to use piezoelectric material to harvest compression energy, i need to calculate the power output but i can't find enough information on the web to figure it out...

    First, I want to learn how to calculate the power output of piezoelectric material using d33 and g33 data.

    Second, what kind of piezoelectric material should i buy to get the most power at low frequency under a stress of 0,5 kN for the price.

    Third, how piezo cable perform vs ceramics, because it would be a lot easier to install them in my device.

    Thank you all for your responses!
  2. jcsd
  3. Apr 19, 2013 #2

    The most important parameter for energy generation with a piezoelectric material is its electromechanical coupling factor, in your case k33. Its mechanical quality factor is also important. PZT is the most common piezoelectric material and may be a good start, depending on your application.

    But that's not the only thing: if your mechanical input is a force, you should also design a structure that resonates at the same frequency than that of the force. You mention "low frequencies" in your post. Which range are you talking about?
  4. Apr 19, 2013 #3


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    Staff: Mentor

    Force isn't energy: you need to know the displacement to calculate available input energy.
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