Power Transformer Spice Model - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 19th July 2006, 07:13 PM   #1
Account Disabled
 
Join Date: Feb 2004
Send a message via AIM to classd4sure Send a message via MSN to classd4sure
Default Power Transformer Spice Model

Hi,

Just wondering if anyone can help me out with a fairly accurate Pspice model of a toroidal power transformer.

It would be nice to able to model core saturation based on the level of DC present, and perhaps some of the parasitics as well.

Thanks,
Chris
  Reply With Quote
Old 19th July 2006, 11:59 PM   #2
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
the most straightforward transformer models just contain the inductances of primary and secondary and their coupling ratio together with the DC winding resistance -- you should add the leakage inductance of the secondary, and the capacitance between primary and secondary into your analysis.


here's a PhD thesis dealing with the topic:
http://www.eece.ksu.edu/vlsi/spiralmod/thesis.pdf

You can find Dr. Leach's article on his website -- just google it:
W. Marshall Leach, Jr., "SPICE models for vacuum-tube amplifiers," J. Audio Eng. Soc. Vol 43, No. 3, March 1995, p. 117


this is a little stray from what you are looking for -- but interesting nonetheless-- a way of getting a BH curve using LabView -- http://www.edn.com/contents/images/6294161.pdf

here's a non-linear transformer model from EWB:
[/i]
.SUBCKT nlt_pq_4_10 2 1 4 3
R0 2 5 66
L0 5 6 146m
A0 (6 1) (7 0) nlt_pq_4_10_lcpl_0
A1 (7 8) nlt_pq_4_10_mcore
A2 (9 3) (8 0) nlt_pq_4_10_lcpl_1
L1 9 10 1.11m
R1 10 4 500m
.MODEL nlt_pq_4_10_lcpl_0 lcouple(num_turns=1.622K)
.MODEL nlt_pq_4_10_mcore core(
+ H_array=[0 13.89 51.58 222.22]
+ B_array=[0 1 1.5 1.7]
+ area=130u length=76.15m
+ input_domain=10m fraction=TRUE mode=1)
.MODEL nlt_pq_4_10_lcpl_1 lcouple(num_turns=141)
.ENDS
  Reply With Quote
Old 20th July 2006, 04:32 PM   #3
Account Disabled
 
Join Date: Feb 2004
Send a message via AIM to classd4sure Send a message via MSN to classd4sure
Ewwwwwwwb? I remember that NIGHTMARE!!!!

Thanks for the tips I'll look them up. I figure it would be handy to have as realistic a transformer model as possible. Alot of the variables will have to be guess work as I can't measure what I do have...
  Reply With Quote
Old 20th July 2006, 04:50 PM   #4
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Quote:
Originally posted by classd4sure
Ewwwwwwwb? I remember that NIGHTMARE!!!!

Thanks for the tips I'll look them up. I figure it would be handy to have as realistic a transformer model as possible. Alot of the variables will have to be guess work as I can't measure what I do have...
EWB, please, it's a Canadian nightmare -- but under the wings of National Instruments it has gotten better. I think that NATI has a better way.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
spice model for UL output transformer? docali Tubes / Valves 30 5th May 2013 01:52 AM
Help With 6v6 Spice Model porcatroya Tubes / Valves 0 5th May 2008 07:41 AM
Spice model of power FET Kashmire Pass Labs 0 20th January 2006 07:20 PM
output transformer spice model Paracelsus Tubes / Valves 6 9th September 2005 03:52 PM
SPICE model Prune Parts 6 16th October 2004 04:22 PM


New To Site? Need Help?

All times are GMT. The time now is 02:52 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2