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piezo energy harvestor with open circuit voltage to closed circuit voltage?

Posted Jun 11, 2012, 12:26 a.m. EDT Low-Frequency Electromagnetics, MEMS & Nanotechnology, MEMS & Piezoelectric Devices, Structural Mechanics Version 4.2 4 Replies

Vineet Tiwari
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hello freinds,

i construct a piezoelectic energy harvestor in comsol 4.2. this model can give us induced open circuit voltage based on applied force of some frequency.but open circuit voltage is hardly of any use.so,please anybody can tell me how we can obtain closed circuit voltage across some load resistance through this model.i also attached my comsol file.
4 Replies Last Post Oct 22, 2012, 1:59 p.m. EDT
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Jun 11, 2012, 12:58 a.m. EDT
Hi

what about combing it with an ACDC CIR physics, wheere you give the RCL impedance of your load ?

--
Good luck
Ivar
Hi what about combing it with an ACDC CIR physics, wheere you give the RCL impedance of your load ? -- Good luck Ivar
Yang Li
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Posted: 1 decade ago Aug 24, 2012, 11:31 a.m. EDT
Hi,
I am trying his module, but there are many errors. and the errors code are changing each time.
How can I solve this problems?



the problems only for study 1

Failed to find a solution.
In segregated group 1:
The relative error (77) is greater than the relative tolerance.
Returned solution is not converged.

.Failed to find a solution.
In segregated group 1:
The relative error (27) is greater than the relative tolerance.
Returned solution is not converged.
Hi, I am trying his module, but there are many errors. and the errors code are changing each time. How can I solve this problems? the problems only for study 1 Failed to find a solution. In segregated group 1: The relative error (77) is greater than the relative tolerance. Returned solution is not converged. .Failed to find a solution. In segregated group 1: The relative error (27) is greater than the relative tolerance. Returned solution is not converged.
Victor Klymko
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Posted: 1 decade ago Oct 22, 2012, 11:56 a.m. EDT
One can try to connect a resistor and make it large or small. Zero resistance drives the solver crazy, I think. Also in the solver configurations, stationary solver branch, you can change the nonlinearity settings to "nonlinear".

One can try to connect a resistor and make it large or small. Zero resistance drives the solver crazy, I think. Also in the solver configurations, stationary solver branch, you can change the nonlinearity settings to "nonlinear".
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Oct 22, 2012, 1:59 p.m. EDT
Hi

you can use the terminal node, use power input, set the power to "0" W and play with the impedance Z eom 1e-1 to 1e3 ohm

--
Good luck
Ivar
Hi you can use the terminal node, use power input, set the power to "0" W and play with the impedance Z eom 1e-1 to 1e3 ohm -- Good luck Ivar

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