Electric transformers

In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits. A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core. Electrical energy can be transferred between separate coils without a metallic (conductive) connection between the two circuits. Faraday's law of induction, discovered in 1831, describes the induced voltage effect in any co

electrical resonant transformer circuit invented by Nikola Tesla

any chemical compound from a series of congeners based on biphenyl skeleton, differing from other compounds of this group by a number and position of chlorine atoms

thumb|right|300px|Single-phase tapped autotransformer with an output voltage range of 40–115% of input In electrical engineering, an autotransformer is an electrical transformer with only one winding. The "auto" (Greek for "self") prefix refers to the single coil acting alone. In an autotransformer, portions of the same winding act as both the primary winding and secondary winding sides of the transformer. In contrast, an ordinary transformer has separate primary and secondary windings that are not connected by an electrically conductive path between them.

current transformer

type of electrical transformer used to produce high-voltage pulses from a low-voltage direct current (DC) supply

thumb|right|Pair of AC&E 120 Ω twisted pair (Krone IDC) to 75Ω [[coaxial cable balun transformers. Actual length is about .]]

safety device for oil-filled electrical transformers

type of electrical transformer used for measuring linear displacement (position)

parallel connected type of instrument transformer, used for metering and protection in high-voltage circuits or phasor phase shift isolation

highly refined mineral oil

device used to isolate or transform voltage or current levels

transformer used to transfer electrical power from a source of alternating current (AC) power to some equipment or device while isolating the powered device from the power source

[[Image:Synchro.JPG|frame|Schematic of a synchro transducer. The complete circle represents the rotor. The solid bars represent the cores of the windings next to them. Power to the rotor is connected by slip rings and brushes, represented by the circles at the ends of the rotor winding. As shown, the rotor induces equal voltages in the 120° and 240° windings, and no voltage in the 0° winding. [Vex] does not necessarily need to be connected to the common lead of the stator star windings. |right]]

mechanism to change turn ratios in transformers

high frequency pulse transformer, commonly used to drive cathode ray tubes

wire with thin layer of insulation, for construction of coils

Leakage inductance derives from the electrical property of an imperfectly-coupled transformer

Type of rotary electrical transformer

method used in electrical engineering to determine the impedance in the excitation branch of a real transformer

Heat produced by electrical currents

electrical test

type of electrical device

phenomenon with inductive coupling

specialised power transformer used to control the flow of real power on three-phase electricity transmission networks

transformer that provides the final voltage transformation in an electric power distribution system

type of electrical circuit

type of auxiliary transformer, part of earthing systems

Is any energised conductor that passes through an earthed field in accordance with IEC60137

resonant transformer circuit

type of transformer

3-phase electric power transformer design

Type of electrical transformer

type of SMPS transformer

designation of electrical transformer configuration

special-purpose transformer

transformer with two parts that rotate in relation to each other

types of electrical transformer

magnetically coupled transformer winding polarities