The iron core serves as the structural framework of the entire transformer and is the main component of its construction. In addition, its other crucial function is to provide a magnetic circuit. When the windings are energized, they generate a magnetic field, and the magnetic flux lines travel through the iron core to form a closed magnetic circuit. This maximizes the magnetic field strength throughout the magnetic path and minimizes magnetic leakage losses. It can be said that the iron core is one of the most essential components in a transformer.