Ch. 13 – Ideal Transformers Recall Given: magnetic flux, Φ, a coil of N turns encircling Φ: Induced voltage Iron-core transformer Circuit Symbol: N1 – number of turns for primary N2 – number of turns for secondary

Ignore “dot” convention – used for defining polarity and current directions. Ideal Transformer - no loss

Impedance Transformation

Equivalent Circuits Original Circuit Reflecting secondary to primary side. Reflecting primary to secondary side.

Example. For the ideal transformer circuit shown find: a) I1 and I2, b) V1, V2, and V0, c) the real and reactive power supplied by the source.