Laminated Steel Core Transformer

However when a magnetic flux flows in a transformers steel core two types of losses occur in the.

Laminated steel core transformer. The core is laminated to reduce these to a minimum as they interfere with the efficient transfer of energy from the primary coil to the secondary one. Transformers for use at power or audio frequencies typically have cores made of high permeability silicon steel. Thus to reduce the losses solid core is not used in transformer. Laminated core transformer showing edge of laminations at top of photo.

Small hysteresis area resulting in low power loss per cycle low core loss and high permeability. Electrical steel is usually manufactured in cold rolled strips less than 2 mm thick. Most transformer cores are constructed from low carbon steels which can have permeabilities in the order of 1500 compared with just 1 0 for air. But a solid iron core has some own disadvantage due to to some losses.

Thin laminated iron core is stacked up to form the complete core. This means that a steel laminated core can carry a magnetic flux 1500 times better than that of air. Interleaved e i transformer laminations showing air gap and flux paths. A magnetic core is a piece of magnetic material with a high magnetic permeability used to confine and guide magnetic fields in electrical electromechanical and magnetic devices such as electromagnets transformers electric motors generators inductors magnetic recording heads and magnetic assemblies it is made of ferromagnetic metal such as iron or ferrimagnetic compounds such as ferrites.