Transformer core are laminated in order to
Transformer core are laminated in order to
Right Answer is:
Minimize eddy current loss
SOLUTION
- In a transformer, the eddy current loss is proportional to the square of the diameter of the core.
- Larger the diameter, the more the eddy current loss.
- In eddy current, the magnetic field that induces a voltage in the secondary of a transformer also induces a voltage in the core. This causes circulating (or eddy currents) in the core.
- Making the laminations as thin as possible reduces this loss.
- The laminations are coated with a thin insulating material to prevent current from flowing between them.
- Hence the transformer core is laminated so that the net effective diameter of the transformer core reduces and thus eddy current loss can be minimized.
High resistivity conducting path: To minimize any ‘eddy currents’ (circulating currents) resulting from undesirable voltages induced into the core; eddy currents are further minimized by manufacturing the core from laminations.