A transformer core may look simple, but its final performance depends heavily on manufacturing precision.
One critical detail is burr height.
When laminations are cut with excessive burrs, the insulation coating between electrical steel sheets can be damaged. This may create local electrical contact between laminations, increasing circulating currents and localized heating.
The result can be:
• Higher no-load loss
• Increased excitation current
• Local hot spots
• Higher vibration and noise
• Reduced long-term reliability
At Chenfan Electric, transformer core manufacturing is controlled around two key parameters:
Burr height: < 0.02 mm
Stacking factor: > 97%
For CRGO transformer cores, precision cutting is not only about dimensional accuracy. It directly affects magnetic performance, assembly quality, and the final efficiency of the transformer.
A good transformer starts with a well-manufactured core.
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