CRGO lamination for Transformers

AMREST manufacturers, exporters and suppliers have own manufacturing and core slitting plant for CRGO lamination in India. We use different material & make as per customer required no-load losses, thickness, flux density and other technical specifications.
We supply CRGO lamination to many reputed transformer manufacturers worldwide.

Purpose of Laminations

Laminations are used in transformer cores to minimize energy losses caused by eddy currents. Eddy currents are loops of electric current induced within the core by the alternating magnetic field, which generate heat and waste energy. By using thin, insulated layers of magnetic material instead of a solid block, the formation of these currents is significantly reduced, thereby improving the transformer’s efficiency.

Cut Laminations for Transformers

Transformers are critical components in electrical systems, used to transfer electrical energy between two or more circuits through electromagnetic induction. One of the essential parts of a transformer is its core, which is made from thin sheets of magnetic material known as laminations.

Assembled Core for Transformer

The assembly of the transformer core involves several critical steps to ensure optimal performance and minimal energy loss:

• Preparation: Laminations, typically made of silicon steel, are cut and coated with an insulating material to prevent eddy currents.
• Stacking: Laminations are stacked in a specific pattern (step-lap or butt-lap) to ensure a continuous magnetic path and reduce gaps that could cause energy loss.
• Step-lap Stacking: Layers are staggered to minimize gaps and improve magnetic efficiency.
• Butt-lap Stacking: Layers are butted together, simpler but can cause slightly higher losses than step-lap.
• Clamping: The stacked laminations are clamped or bonded together to maintain alignment and structural integrity. Clamping ensures that the core remains compact and stable during operation.
• Insulation: Insulating materials are applied between layers to prevent short circuits and reduce eddy current losses. This insulation is crucial for maintaining the transformer’s efficiency and longevity.