Piezoelectric power

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Jagan Mohan Reddy Kudimi

Jagan Mohan Reddy Kudimi

October 18, 2011 1:42pm UTC

Piezoelectric power

hi! all
I have designed the piezoelectric energy harvester structure in COMSOL. I have doubt regarding finding power. I found that current will be obtained by integrating the current density. Here is my doubt, generally to get power is to multiply voltage and current, but in COMSOL we will get open circuit voltage and current. In this situation it is right way to multiply open circuit voltage and current to get power without load. Another doubt is that I tried to connect the resistor to my piezo model through SPICE netlist but it is not working. Please clarify my doubts and grateful to help me.

Thank You
Jagan

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Jagan Mohan Reddy Kudimi

Jagan Mohan Reddy Kudimi

October 19, 2011 2:30am UTC in response to Jagan Mohan Reddy Kudimi

Re: Piezoelectric power

hi!

I tried to connect the resistor to a piezo model, but it is not working. Please help me in SPICE netlist.

Thanks,
Jagan

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Jagan Mohan Reddy Kudimi

Jagan Mohan Reddy Kudimi

October 19, 2011 4:20am UTC in response to Jagan Mohan Reddy Kudimi

Re: Piezoelectric power

Hi! again,

I tried the SPICE netlist to connect the resistor to the piezo model and finally I connected the resistor to the piezo model. But when I change the resistor value, the output voltage doesn't change with load resistor. Can any one give solution this problem.

Thanks
Jagan

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Ivar Kjelberg

Ivar Kjelberg

October 19, 2011 5:52am UTC in response to Jagan Mohan Reddy Kudimi

Re: Piezoelectric power

Hi

but does the current change ? and the total power ?

--
Good luck
Ivar

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Jagan Mohan Reddy Kudimi

Jagan Mohan Reddy Kudimi

October 19, 2011 6:30am UTC in response to Ivar Kjelberg

Re: Piezoelectric power

Hi! Ivar,

Yes current and power are changing with respect to the load resistor.

Thanks,
Jagan

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Ivar Kjelberg

Ivar Kjelberg

October 19, 2011 6:40am UTC in response to Jagan Mohan Reddy Kudimi

Re: Piezoelectric power

Hi

but then it's perhaps normal that the voltage is not changing.

As the PZT is a voltage to displacement (and reciprocal) transducer,
just like a voice coil is a current to force transducer,

or ?

--
Good luck
Ivar

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Edgar Kaiser

Edgar Kaiser

October 19, 2011 7:06am UTC in response to Jagan Mohan Reddy Kudimi

Re: Piezoelectric power

Hi,

In order to maximize the power output of the piezoelectric device you must find the correct impedance match, i.e. your load resistor must be equal to the impedance of the source. I would suggest to do a parameter study for the load resistor to see which value gives maximum power.

Cheers
Edgar

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Jagan Mohan Reddy Kudimi

Jagan Mohan Reddy Kudimi

October 19, 2011 7:37am UTC in response to Ivar Kjelberg

Re: Piezoelectric power

Thanks Ivar

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Jagan Mohan Reddy Kudimi

Jagan Mohan Reddy Kudimi

October 19, 2011 7:38am UTC in response to Edgar Kaiser

Re: Piezoelectric power

Thanks Edgar

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Oussama Trabelsi

Oussama Trabelsi

August 9, 2012 1:24pm UTC in response to Jagan Mohan Reddy Kudimi

Re: Piezoelectric power

how did you connect the resistor to the piezo model?? i need help .

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venkatesh

venkatesh

December 30, 2013 5:06am UTC in response to Jagan Mohan Reddy Kudimi

Re: Piezoelectric power

Hi
Can yo tell me how to connect resistor using SPICE netlist

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