Transformer model 2D vs. 3D - QuickField simulation example
Example courtesy of Sergey Chishko
Magnetic flux through a transformer leg in front and side two-dimensional views, estimating the significance of coil-end effects omitted by a 2D model.
How to calculate the significance of coil-end effects in a 2D transformer model?
Answer Typical applications Geometry
Given
Task
Solution
Results
Magnetic flux in cross sections of the transformer in front and side models:
Engineering question
Compare front- and side-view 2D models; the side-view coil ends contribute only 1.7% of total leg flux and can usually be neglected.
power transformers, laminated core transformers, transformer limb sections
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Simulation problem
Problem Type
Plane-parallel problem of DC magnetics.
Core relative permeability 1000;
Coil conducts current I = 5 A.
Obtain and compare the values of magnetic flux over the cross section of a transformer leg holding the coil for transformer's front and side view problems sets.
To study the impact of end effects on the total magnetic flux in the transformer two models are simulated: front view and side view.
Front-view model (2D) considers only a part of a coil with a current direction "in" and "out" of the plane and neglecting end effects of "front" and "end" coil parts with currents flowing along the plane. Side-view (2D) model considers only "front" and "end" coil parts.
Both models features the same number of turns of the coil and the current.
Front-view model magnetic flux is 77.7 uWb (98.3%).
Side-view model magnetic flux is 1.3 uWb (1.7%).
Coil end parts produce only 1.7% of the total magnetic flux and could be neglected in most cases.
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