# Magnetic circuit in my simulation and magnetic losses **URL:** \ **Category:** PLECS\ **Tags:** magnetic-circuit\ **Created:** [March 11, 2025, 6:27pm UTC](https://forum.plexim.com/t/magnetic-circuit-in-my-simulation-and-magnetic-losses/1894 "2025-03-11T18:27:50Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![maaqibsh](https://avatars.discourse-cdn.com/v4/letter/m/94ad74/32.png) [@maaqibsh](https://forum.plexim.com/u/maaqibsh)\ **Post date:** [March 11, 2025, 6:27pm UTC](https://forum.plexim.com/t/magnetic-circuit-in-my-simulation-and-magnetic-losses/1894/1 "2025-03-11T18:27:50Z")
Dear PLECs Team, I hope you are doing well. I am currently facing difficulties with the magnetic circuit in my simulation. I initially simulated using an ideal transformer, and everything was working perfectly. However, after inserting a magnetic model of the three-winding, three-leg transformer, I started receiving some unexpected results. I have attached the simulation file for your reference. Could you kindly review it and let me know where I might be making a mistake? Additionally, I would like to calculate the losses in the core and winding of the transformer. I have come across the concept of magnetic resistance, but I am unsure how to calculate its value. I would greatly appreciate your guidance on this process. Thank you for your time and assistance. Regards, Aaqib Sheikh [TAB\_2.plecs](https://forum.plexim.com/uploads/short-url/76b5J6foVUhGhg59VMZ9XGwzwzl.plecs) (170.0 KB) ---
**Author:** ![RetoChristen](https://dub1.discourse-cdn.com/flex006/user_avatar/forum.plexim.com/retochristen/32/1225_2.png) [@RetoChristen](https://forum.plexim.com/u/RetoChristen)\ **Post date:** [March 13, 2025, 6:57am UTC](https://forum.plexim.com/t/magnetic-circuit-in-my-simulation-and-magnetic-losses/1894/2 "2025-03-13T06:57:31Z")
This is currently being addressed in the support channel, and the solution will be shared in this post.