Asking for piezoelectric bulk energy harvesting
Asking for piezoelectric bulk energy harvesting
(OP)
Hi all,
I' m new in this forum. Greeting to all.
I'm doing a project of energy harvesting from piezoelectric bulk type by force impact input. The output of the device when no load is a pulse like with amplitude 60-70 V.peak and pulse width about 500 us.
The standard technique of full bridge rectifier with parallel storage capacitor, the voltage across the cap. gets 20-30 mV(storage cap: 220-470 uF) at the first impact and rate decreases thereafter.
I would like to ask for any idea to get the storage energy more efficiently.
PS. The purpose is to store the harvested energy into a capacitor and give to a DC-DC converter for charging a battery. The energy sources brought from piezoelectric together with electromagnetic induction which now gets quite satisfactory energy output.
Can anyone help me on the piezoelectric energy harvesting issue? I also attach the photo and primary experiment.
Thank you.
Bundit
I' m new in this forum. Greeting to all.
I'm doing a project of energy harvesting from piezoelectric bulk type by force impact input. The output of the device when no load is a pulse like with amplitude 60-70 V.peak and pulse width about 500 us.
The standard technique of full bridge rectifier with parallel storage capacitor, the voltage across the cap. gets 20-30 mV(storage cap: 220-470 uF) at the first impact and rate decreases thereafter.
I would like to ask for any idea to get the storage energy more efficiently.
PS. The purpose is to store the harvested energy into a capacitor and give to a DC-DC converter for charging a battery. The energy sources brought from piezoelectric together with electromagnetic induction which now gets quite satisfactory energy output.
Can anyone help me on the piezoelectric energy harvesting issue? I also attach the photo and primary experiment.
Thank you.
Bundit





RE: Asking for piezoelectric bulk energy harvesting
RE: Asking for piezoelectric bulk energy harvesting
Have you done a literature survey? Surely there's some research data out there. There are already practical implementations of the concept.
RE: Asking for piezoelectric bulk energy harvesting
Best to you,
Goober Dave
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RE: Asking for piezoelectric bulk energy harvesting
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RE: Asking for piezoelectric bulk energy harvesting
RE: Asking for piezoelectric bulk energy harvesting
RE: Asking for piezoelectric bulk energy harvesting
RE: Asking for piezoelectric bulk energy harvesting
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RE: Asking for piezoelectric bulk energy harvesting
Depending on this answer, it may be completely impractical to use a switch mode power supply to increase the voltage. In fact, the entire system may be completely impractical.
RE: Asking for piezoelectric bulk energy harvesting
Do you have the practical idea to transfer this charges to accumulate with another energy generator,magnetic induction which produces energy 8000-9000 uJ for a sequential excitation of the system movement?
Thank you.
RE: Asking for piezoelectric bulk energy harvesting
RE: Asking for piezoelectric bulk energy harvesting
For 5 uJ (10 hits), but you need 9000 uJ (x1800), so you'd need 18,000 hits. At 3 seconds between hits, that's at least 15 hours of banging away. And that's assuming 100% efficiency and zero losses referenced to your 5 uJ reference point.
9000 uJ is .009 watt-seconds. Once every 15+ hours (if we make false assumptions).
I'd use a battery.