COMSOL Forums: How to provide a pulsed input???

Re: How to provide a pulsed input???

Thu, 04 Oct 2012 09:48:46 +0000

Thank you sir!!!!

Re: How to provide a pulsed input???

Wed, 03 Oct 2012 20:54:22 +0000

Hi

in v4 under Definitions - Functions you find several predefined functions, and several have "smoothing " options for the else sharp edges, check the sub nodes of the functions

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Good luck
Ivar

Re: How to provide a pulsed input???

Wed, 03 Oct 2012 20:28:33 +0000

May i know where to find the step function?

Re: How to provide a pulsed input???

Wed, 03 Oct 2012 20:04:30 +0000

may i know where to find the step function?

Re: How to provide a pulsed input???

Wed, 03 Oct 2012 12:20:20 +0000

Thank you very much for reply Mr.Dinh
Since am totally new to comsol i would love the opportunity of receiving further assistance.
I had designed a model which include a circular dielectric material and two electrodes ?(Positive & ground)
All i know about applying voltage is to enter 1200 in the equation which appears when i click Electric potential under Electrostatics.May i kindly request your esteemed self to add more details such as where to enter the values etc.
Thank you.

Re: How to provide a pulsed input???

Wed, 03 Oct 2012 12:03:36 +0000

Hi,

You can use "step" function of COMSOL:

step1(t-t_start)*1200-step1(t-t_start-dt_pulse)*1200

t_start= instant that you want to impose the pulse
dt_pulse=1e-9
Set the size of transition zone of "step" function, time step enough small (<1e-9)

Regards,

Dinh

How to provide a pulsed input???

Wed, 03 Oct 2012 11:05:06 +0000

Hello,
Am working on AC/DC module and would be grateful if you guys could help me for my problem.
My issue is to give an pulsed input of 1200v with duration of 10^(-9)second.

Thanks in advance.