A transformer is a device working on mutual inductance principle to convert electrical energy from one voltage/ current level to another. There are different types of transformers used for different purposes.
(1) POWER TRANSFORMER
- Laminated core Transformer
- Toroidal Transformer
- Auto transformer
- Variable auto transformer
- Induction regulator Transformer(high voltage transformer)
- Polyphase transformer
- Grounding transformer
- Phase-shifting transformer
- Variable-frequency transformer(three-phase transformer)
- Leakage or stray field transformers
- Resonant transformer
- Constant voltage transformer
- Ferrite core transformer
- Planar transformer
- Oil cooled transformer
- Cast resin transformer
- Isolating transformer
(2) Instrument transformer
- Current transformer
- Voltage transformer or potential transformer
- Combined instrument transformer
(3) Pulse transformer
(4) RF transformer
- Air-core transformer
- Ferrite-core transformer
- Transmission-line transformer
- Balun transformer
(5) IF transformer
(6) Audio transformer
- Two speaker level audio transformer
- Five speaker level audio transformer
- Loudspeaker transformer
Output transformer
- Small signal transformer
- Inter stage and coupling transformers
Other types of transformers are
- Hedgehog transformer
- Rotary transformer
- Variable differential transformer