EI Lamination: Core of Electrical Efficiency
EI laminations , named for their “E” and “I” shapes, are vital in electromagnetic devices for optimizing magnetic flux and energy transfer. Crafted from 0.35–0.5 mm silicon steel sheets, their stacked structure with insulated layers minimizes eddy current losses, a key factor in device efficiency. How They Work When AC flows through a winding, EI cores—with high magnetic permeability—channel alternating magnetic fields. This induces voltage in secondary windings per Faraday’s law, ensuring efficient energy transfer with minimal flux leakage. The laminated design prevents conductive loops, reducing heat loss and boosting performance. Material & Manufacturing Silicon steel (2–4% Si) is preferred for its high permeability and low resistivity, balancing flux transfer and eddy current reduction. Manufacturing involves: 1. Cutting/Stamping: Precision dies form “E”/”I” shapes from silicon steel sheets. 2. Annealing: Heating relieves stress and realigns magnetic...