The Cost of Optimizing Only for Minimum No-Load Loss
The lowest no-load-loss design is not necessa…
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Core design & magnetic performance
Practical engineering articles for transformer-core selection, design and production.
65 articles
Core-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 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 articleCore Diameter and Effective Area Are Not Interchangeable
Which diameter is on the drawing: the physica…
Read full articleLimb Centre Distance: Small Errors, Different Assembly Consequences
Two centre-distance deviations of the same ma…
Read full articleWindow Size Means Usable Winding Clearance, Not Just Two Dimensions
A winding can fit the nominal window and stil…
Read full articleLarge-Core Dimensional Chains: Why Every Part Can Pass and the Assembly Still Miss
Every dimension on the inspection sheet is gr…
Read full articleStanding and Flat Core Handling Need Different Mechanical Assumptions
A stack that is stable on a building table ha…
Read full articleWhich Core Tolerances Are Worth Tightening?
Tolerance should follow sensitivity. A critic…
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