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Old 13th August 2006, 01:12 PM   #1
jarthel is offline jarthel  Australia
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Join Date: Jan 2002
Location: somewhere in Australia
Default does anyone know how to add a transformer in orcad capture?

could you also tell me how to customize it?

primary is 230VAC
secondary is 9V 5.5A.

I am currently using XFRM_LINEAR and I'm confused. I can only change it's inductance and I do not how it relates to the winding voltage rating.

Thank you for the help.
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Old 13th August 2006, 07:20 PM   #2
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Location: Minnesota
I don't know anything about the XFRM_LINEAR model you are using. However, a transformer is made of coupled inductors on a common core. The following equations apply:

Vsec=Nsec*Vpri/Npri

Lpri/Lsec=(Npri/Nsec)^2

Using these 2 equations

Vsec=sqrt(Lpri/Lsec)*Vpri

For your case N=9/230=.0391 and N^2=.00153.
Therefore, Lsec=.00153*Lpri
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Old 14th August 2006, 12:10 AM   #3
jarthel is offline jarthel  Australia
diyAudio Member
 
Join Date: Jan 2002
Location: somewhere in Australia
Quote:
Originally posted by sawreyrw
I don't know anything about the XFRM_LINEAR model you are using. However, a transformer is made of coupled inductors on a common core. The following equations apply:

Vsec=Nsec*Vpri/Npri

Lpri/Lsec=(Npri/Nsec)^2

Using these 2 equations

Vsec=sqrt(Lpri/Lsec)*Vpri

For your case N=9/230=.0391 and N^2=.00153.
Therefore, Lsec=.00153*Lpri
thank you.

another question:

to add the AC source from the electric company, do I just include "VAC" (from the source library)?
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