DIY Knowledge

Netztransformatoren

Transformadores de red

Transformateurs de puissance

Transformers are capable of converting electrical power to a specific voltage or current without mechanical motion. Their efficiency ratio lies between 90% and 98% depending on the size and type of transformer owing to the absence of moving parts.

Transformers consist of a lamellar iron core. Three different types of cross-sectional shapes are known:

Two separate windings are arranged as coils on the iron cores. They are only magnetically linked. If a current change occurs in the primary winding (N1), the magnetic field changes and a voltage is induced in the secondary winding (N2).

If the minimal losses are ignored, one can assume for an ideal transformer the following transmission ratio (Ü):

              N1         U1          I2



     Ü =           =           =          



              N2         U2          I1