Average W/kg Can Hide a Local Problem
A core can have an acceptable average loss wh…
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Core design & magnetic performance
Practical engineering articles for transformer-core selection, design and production.
65 articles
What 90%, 100% and 110% Excitation Can Reveal
One excitation point gives you a result. Seve…
Read full articleNormal Loss, High Exciting Current: Where to Start
The watts are acceptable. The exciting curren…
Read full articleThe Magnetic Consequences of a Punched Hole
A hole is a missing piece of the magnetic pat…
Read full articleLamination Alignment Is a Magnetic and Assembly Variable
An offset lamination is not just an untidy ed…
Read full articleMore Step-Lap Steps Do Not Automatically Make a Better Core
Adding steps changes a joint design. It does …
Read full articleThe Smallest Step-Lap Gap Is Not the Whole Objective
"Close the gap as much as possible" is not a …
Read full articleClamping Pressure Is Not a More-Is-Better Setting
The torque wrench clicks. The core is still n…
Read full articleMechanical Stress After the Core Is Built
The chemistry has not changed. The magnetic r…
Read full articleTransformer Core Drawings and Manufacturing Recipe Control
Look at two cores made to the same drawing. T…
Read full articleTransformer Core Building Factor: Define the Baseline First
What does a building factor of 1.15 actually …
Read full articleTwo domain-refined GOES sheets at 1.7 T, 50 Hz:
Compare 0.20 mm and 0.23 mm domain-refined GO…
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