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

Posted 11 giu 2012, 00:26 GMT-4 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 22 ott 2012, 13:59 GMT-4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 11 giu 2012, 00:58 GMT-4
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 24 ago 2012, 11:31 GMT-4
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 22 ott 2012, 11:56 GMT-4
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 22 ott 2012, 13:59 GMT-4
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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