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Rectangle pulse

Posted 19 avr. 2012, 22:35 UTC−4 Low-Frequency Electromagnetics Version 4.2 4 Replies

Huang Kang
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hello, everyone, i am a starter here. I want to describe a rectangle pulse, but I don't konw how to implement in comsol.
pulse width: 0.005 ms; frequency: 200 Hz; peak voltage: 300 V
could you tell me the function of this rectangle pulse, thank you very much!
4 Replies Last Post 20 avr. 2012, 21:05 UTC−4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 20 avr. 2012, 11:44 UTC−4
Hi

in V4.2 under Definition Functions you can get a predefined rectangle function with smooth transistions (without overshoot ;) check your right click lists and sub-lists

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Good luck
Ivar
Hi in V4.2 under Definition Functions you can get a predefined rectangle function with smooth transistions (without overshoot ;) check your right click lists and sub-lists -- Good luck Ivar
Huang Kang
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Posted: 1 decade ago 20 avr. 2012, 12:18 UTC−4
thank you for your reply.
But i only found the pre-defined function for square wave.
In my model, the time for high level voltage is different from the time for low level voltage.
So what should i do ?
thank you for your reply. But i only found the pre-defined function for square wave. In my model, the time for high level voltage is different from the time for low level voltage. So what should i do ?
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 20 avr. 2012, 12:45 UTC−4
Hi

then why not combine two "step function one going from 0 1 and the other from 1 to 0 with different transition times and slopes, then you combien them in an analytical function

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Good luck
Ivar
Hi then why not combine two "step function one going from 0 1 and the other from 1 to 0 with different transition times and slopes, then you combien them in an analytical function -- Good luck Ivar
Huang Kang
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Posted: 1 decade ago 20 avr. 2012, 21:05 UTC−4
thank you very much .
thank you very much .

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