TRANSFORMERS

Term and definition

Transformer

is an alternating device that transfers power from one circuit to another without a rotating part and change or frequency

Transformer

it works on the principle of mutual induction

Mutual induction

is the basis of transformer between two circuits link by a common magnetic flux.

Joseph Henry and Michael Faraday 1030s

work with electromagnets and discover the property of induction independently on separate continent

Rev. Nicholas Callan 1836

invents the induction coil

Pavel Yablochkov 1876

uses induction coils in his lighting system

Ganz Company 1878-1885

uses induction coils in their lighting system with AC incandescent systems. This is the first appearance and use of toroidal shaped transformer.

Charles F. Brush 1881

develops his own design of transformer

Sebastian Ziani de Ferranti 1880-1882

design one of the earliest AC power system with William Thompson. He creates early transformer

Lucien Gaulard and John Dixon Gibbs 1882

first built a “secondary generator” or in today’s terminology a step down transformer

transformer timeline in 1884

Otto Blathy suggested the use of closed-cores, Karoly Zipernowsky the use of shunt connections, and Miksa Deri had performed the experiment.

William Stanley 1885

makes the transformer more practical due to some design changes

Step-up transformer

the function of converting low voltage and high current from the transformer primary side to high voltage and low current value on the transformers secondary side.

Step-down transformer

converts high voltage with low current from the primary side of the transformer to low voltage and high current value on the secondary side of transformer.

Core-type construction

it is in the form of rectangular frame made from cold rolled grain oriented sheet steel ( C.R.G.O) with silicon steel lamination.

Shell-type construction

the magnetic circuit (core) surrounds a considerable portion of windings. The primary and secondary windings are place on a central limb of the core. 

Single-phase transformer

is an electrical device that accepts singe-phased AC power and output single-phase AC. They are used as a step-down transformer to decrease the home voltage to a suitable value without change in frequency.

Three-phase transformer

are used for electrical power generation, transmission, and distribution, as well as for industrial uses.