1) A transformer works on the principle of mutual induction, where changing magnetic flux in one coil induces an EMF in a neighboring coil. 2) There are two types of transformers: step-up transformers which increase voltage, and step-down transformers which decrease voltage. 3) An ideal transformer has zero leakage flux between coils, windings with no resistance, an infinitely permeable core with zero reluctance, and is lossless with no hysteresis or eddy currents.

1. BY,
BHAVISHA PATEL

2. Working of transformer

3. Types of transformer
• A transformer works on the principle of mutual induction.
• Mutual induction is the phenomenon by which when the amount of
magnetic flux linked with a coil changes, an E.M.F. is induced in the
neighboring coil.
• Two types of transformer ,
1)step up transformer
2)step down transformer

4. Step-up transformer Step-down transformer

5. Ideal Transformer
• Zero leakage flux:
-Fluxes produced by the primary and secondary currents are confined within the core.
• The windings have no resistance:
- Induced voltages equal applied voltages.
• The core has infinite permeability:
- Reluctance of the core is zero.
- Negligible current is required to establish magnetic flux.
• Loss-less magnetic core:
- No hysteresis or eddy currents.
•

7. EMF EQUATION
OF
TRANSFORMER.

8. AUTO TRANSFORMER
An autotransformer is an electrical
transformer with only one winding.
An autotransformer with multiple taps
may be applied to adjust the voltage at
the end of a long distribution circuit to
correct for excess voltage drop; when
automatically controlled.