1. 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

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

3. Impedance Transformation

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

5. 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 load.