What Is Transformer?

                                            What Is  Transformer?

A transformer is a passive electrical device that transfers electrical energy from one electrical circuit to another, or multiple circuits without change of frequency.

A transformer consists of two electrically isolated coils and operates on Faraday's principal of “mutual induction”, in which an EMF is induced in the transformers secondary coil by the magnetic flux generated by the voltages and currents flowing in the primary coil winding.

Working Principle -:The operation principle of the single-phase transformer is: the AC voltage source injects the AC current through the transformer primary winding. ... Thus the voltage is induced in the secondary winding with the same frequency as the voltage of the primary side. The induced voltage value is determine by Faraday's Law

Uses -: Transformers are most commonly used for increasing low AC voltages at high current (a step-up transformer) or decreasing high AC voltages at low current (a step-down transformer) in electric power applications, and for coupling the stages of signal processing circuits.

Types-: Contents

• 1Power transformer
  • 1.1Laminated core
  • 1.2Toroidal
  • 1.3Autotransformer
  • 1.4Variable autotransformer
  • 1.5Induction regulator
  • 1.6Polyphase transformer
  • 1.7Grounding transformer
  • 1.8Phase-shifting transformer
  • 1.9Variable-frequency transformer
  • 1.10Leakage or stray field transformer
    • 1.10.1Uses
  • 1.11Resonant transformer
    • 1.11.1Constant voltage transformer
  • 1.12Ferrite core
    • 1.12.1Planar transformer
  • 1.13Oil-cooled transformer
  • 1.14Cast resin transformer
  • 1.15Isolating transformer
  • 1.16Solid-state transformer
• 2Instrument transformer
  • 2.1Current transformer
  • 2.2Voltage transformer or potential transformer
  • 2.3Combined instrument transformer
• 3Pulse transformer
• 4RF transformer
  • 4.1Air-core transformer
    
    • • 4.2Ferrite-core transformer
      • 4.3Transmission-line transformer
      • 4.4Balun
    • 5IF transformer
    • 6Audio transformer
      • 6.1Loudspeaker transformer
      • 6.2Output transformer
      • 6.3Small-signal transformer
      • 6.4Interstage and coupling transformer
    • 7Other types
      • 7.1Transactor
      • 7.2Hedgehog
      • 7.3Variometer and variocoupler
      • 7.4Rotary transformer
      • 7.5Variable differential transformer
      • 7.6Resolver and synchro
      • 7.7Piezoelectric transformer