Automation Can Repeat the Wrong Core Recipe Very Precisely
An automated line can reproduce a wrong packe…
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Testing, standards & specification
Practical engineering articles for transformer-core selection, design and production.
65 articles
More Finished-Core Data Is Useful Only If It Changes a Decision
Would another twenty columns in the supplier …
Read full articleHow Efficiency Requirements Change the Core-Supplier Conversation
A tighter transformer loss budget changes wha…
Read full articleCore-Loss Margin: Name the Uncertainty Before Adding the Allowance
What does the loss margin cover that the buil…
Read full articleNo-Load Loss and Exciting Current Measure Different Things
Watts describe energy dissipation. RMS ampere…
Read full articleExciting Current: Read the Denominator Before the Percentage
An exciting-current percentage is incomplete …
Read full articleLow-Flux Testing: Useful Evidence with a Different Boundary
A low-voltage diagnostic result should not be…
Read full articleWhy an Approved 110% Excitation Point Can Be So Revealing
Suppose two cores agree near the reference po…
Read full articleOver-Fluxing Is a V/f and Magnetic-Circuit Question
Rated voltage does not establish rated flux w…
Read full articleStacking Factor: The Area Error That Changes the Operating Point
A stacking-factor assumption enters the magne…
Read full articleFour Quality Decisions That Should Not Be Collapsed into One
A core can be cosmetically acceptable, dimens…
Read full articleWhy a Visually Perfect Core Still Needs Magnetic Evaluation
Would a photograph of a core tell you which o…
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Engineering reference notes
Short reference notes complement the full published articles.