Transformer core stability depends heavily on the quality of electrical steel laminations used during core assembly. Among the many manufacturing parameters, burr control and edge quality play a decisive role in ensuring mechanical integrity, magnetic performance, and long term operational reliability. Sarjani Coretech places strong emphasis on these factors across its CRGO slit coils and transformer laminations.
What burrs are and why they occur
Burrs are raised metal edges formed during slitting, shearing, or punching of CRGO steel. They typically occur due to worn tools, improper clearance, inconsistent strip tension, or incorrect cutting speeds. Sarjani Coretech follows controlled slitting practices and regular tool monitoring to ensure burr levels remain within strict limits.
Effect on mechanical stability
Poor edge quality leads to uneven stacking of laminations. Burrs prevent flat contact between layers, creating localized stress points within the core. Over time, these stresses can result in core movement, loosening of clamping pressure, and vibration during operation. Sarjani Coretech laminations are produced with uniform edge quality, supporting stable stacking and consistent clamping force across the core.
Impact on magnetic performance
Burrs can cause unintended electrical contact between laminations. This damages insulation coating and creates shorted paths within the core. As a result, eddy current losses increase and overall efficiency reduces. Sarjani Coretech maintains clean edges and controlled burr height to preserve insulation integrity and maintain the intended magnetic circuit.
Noise and vibration concerns
Uneven edges and burr related gaps contribute to higher operational noise due to irregular flux distribution. Transformers assembled with poor edge quality often show increased humming and vibration. The consistent edge finish achieved by Sarjani Coretech helps ensure uniform flux flow and quieter transformer performance.
Thermal effects and aging
Higher core losses caused by burr induced electrical contact lead to localized heating. This accelerates insulation aging and impacts transformer life. By maintaining low burr levels and consistent edge finish, Sarjani Coretech supports stable thermal behavior and long term reliability of transformer cores.
Importance during core assembly
Accurate edge quality allows precise stacking, proper step lap formation, and dimensional stability of the core. This is especially important for mitred and step lap laminations. Sarjani Coretech laminations support accurate assembly, reduced handling damage, and consistent core geometry during installation.
Conclusion
Burr control and edge quality directly influence transformer core stability, losses, noise levels, and service life. Through controlled manufacturing processes and strict quality checks, Sarjani Coretech delivers CRGO laminations and slit coils that support reliable transformer performance across applications.