does anyone know how to add a transformer in orcad capture?

[jarthel]

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.

[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

[jarthel]

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)?