Transformer is a device that uses the principle of electromagnetic induction to change AC voltage. The main components are primary coil, secondary coil and iron core (magnetic core). The main functions are voltage conversion, current conversion, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer) and so on. The utility model can be divided into distribution transformers, power transformers, full sealed transformers, combined transformers, dry-type transformers, oil immersed transformers, single-phase transformers, electric furnace transformers, rectifier transformers, etc..
Transformer manufacturing principle:
In a generator, whether coil movement through the moving magnetic field or magnetic field through the fixed coil, can induction voltage in the coil, the two kinds of circumstances, the magnetic flux values are unchanged, but with the coil intersection chain flux quantity is changed, this is the principle of mutual inductance should. A transformer is a device that uses electromagnetic mutual inductance to change voltage, current, and impedance.
According to the cooling way classification: dry (self cooling) transformer, oil immersed (self cooling) transformer, fluoride (evaporative cooling) transformer. According to the way of classification: open type transformer, potting transformer, sealed transformer.
According to the classification of the core or coil structure: core type transformer (core inserts, C cores, ferrite core, shell type transformer (core), insert the C cores, ferrite core), toroidal transformer, transformer metal foil.
According to the power supply classification: single-phase transformer, three-phase transformer, multi-phase transformer.
According to the use of classification: power transformers, voltage transformers, audio transformers, intermediate frequency transformers, high frequency transformers, pulse transformers.