What is the primary function of a transformer core?

The primary function of a transformer core is to provide a path for magnetic flux. In a transformer, the core is typically made from ferromagnetic materials that are efficient at conducting magnetic fields. When alternating current flows through the primary winding, it creates a magnetic field that induces a magnetic flux in the core. This magnetic flux is then linked to the secondary winding, enabling the transfer of energy from the primary to the secondary side of the transformer through electromagnetic induction.

The core's ability to enhance the magnetic coupling between the primary and secondary windings significantly improves the transformer’s efficiency and performance. Without an effective core to guide the magnetic flux, much of the energy would be lost, and the transformer would not function effectively.