Transformer Simulation Issues – Clarification Required

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I am simulating a transformer with primary and secondary coils wound around the core limb. During the simulation, I encountered the following issues:

1. Issue with B-H Curve and Flux Density • I have assigned the B-H curve as the material property for the core. • After running a stationary study, the maximum flux density (Bmax) is showing approximately 400 T. • This value is physically unrealistic, since ferrite materials typically saturate around 0.3–0.5 T.

Question: Why is the simulation showing 400 T? Where could I be making a mistake in the setup?

2. Open Circuit and Short Circuit Giving Same Results

• When I excite one coil (either with voltage or current), • And apply open-circuit or short-circuit conditions to the other coil, • The simulation results remain the same in both cases. This behavior is unexpected because: • In open-circuit condition, only magnetizing current should flow. • In short-circuit condition, high current limited by leakage inductance should flow.

*Question: Why are both cases producing identical results? What mistake in the modeling or boundary conditions could be causing this issue? *



1 Reply Last Post 24 févr. 2026, 04:36 UTC−5
Edgar J. Kaiser Certified Consultant

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Posted: 4 hours ago 24 févr. 2026, 04:36 UTC−5

First of all you must add another Ampere's law with the BH constitutive relation for the core domain. There may be more issues.

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Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
First of all you must add another Ampere's law with the BH constitutive relation for the core domain. There may be more issues.

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