A transformer is an electrical arrangement designed to convert alternating current AC from one voltage to another. Therefore, the transformer in this subject is a Step down Transformer. Various specific electrical application designs require a variety of In many electronic devices, a transformer is used to convert voltage from the distribution wiring to convenient values for the circuit requirements, either directly at the power line frequency or through a Signal and audio transformers are used to couple stages of Faraday performed early experiments on induction between coils of wire, including winding a pair of coils around an iron ring, thus creating the first The first type of transformer to see wide use was the Induction coils with open magnetic circuits are inefficient at transferring power to In both designs, the magnetic flux linking the primary and secondary windings traveled almost entirely within the confines of the iron core, with no intentional path through air (see Transformers today are designed on the principles discovered by the three engineers. A voltage is then induced in the other coil, called the secondary or output coil. Hence, this type of transformer is used to reduce the voltage to specified levels of the circuit.

Therefore, both hysteresis and eddy current losses are constant during all loads.

Hence the core set up eddy currents in the core, thereby considerable eddy current losses occurs in the core.From the above two equations, it is to be observed that the supply voltage at a fixed frequency is constant and hence the flux in turn flux density in the core is almost constant. Santosh project maker design projects for students under 10th class, 11th class and 12th class and also for small kids bellow 10th standard

This EMF induced in each winding is proportional to the number of turns in it. If the secondary circuit is closed or the load is connected, secondary current starts flowing through it which causes to create demagnetizing magnetic flux. The efficiency is maximum at unity power factor and is determined by calculating the total losses from OC and SC tests.It’s really very helpful information,, thanQ so much.Because of simple, durable and rugged construction, transformers require a little maintenance. This voltage with increased levels is then transmitted to a distribution station.At the distribution station, the 440kV is reduced to 11kV using a Step down Transformer. The whole winding consists of stacked discs and in between the coils the insulation space is provided to form the horizontal insulating and cooling ducts.Berry transformer is the most commonly used shell type transformer. Concentric coils are used in core type transformers whereas sandwiched coils are used in shell type transformers. For example, if the circuit needs a high voltage we will connect the HV terminals to the load whereas the load or circuit needs a low voltage, we will connect the LV terminals to the load.The ratio of the voltage of a transformer is determined by the turns ratio. 4) Where is current. This varying flux at the secondary winding induces a varying The windings are wound around a core of infinitely high magnetic permeability so that all of the magnetic flux passes through both the primary and secondary windings. The transformer is a device used for converting a low alternating voltage to a high alternating voltage or a high alternating voltage into a low alternating voltage.

. It may be used to step up or step down the voltage.This article is about the electrical device. There are two types of transformers classified by their function: Step up Transformer and Step down Transformer.A Step up Transformer is a device which converts the low primary voltage to a high secondary voltage i.e. The power in a transformer is rated in Volt – Amps VA (or Kilo Volt – Amps kVA for larger transformers). This is due to the lesser number of coils in the primary compared to the secondary. Hysteresis and Closed-core transformers are constructed in 'core form' or 'shell form'. From the above efficiency equation, it may be noted that the efficiency is depends on the watts, but not in volt-ampere rating. Hence the core losses are also called as constant losses.By using the high grade core materials like silicon steel having very low hysteresis loop, hysteresis losses are minimized or reduced.

The most commonly used coils for the transformer include helical, sandwiched, disc and cross over coils.Other necessary parts of the transformer are conservator tank which is used to provide the necessary oil storage such that the pressure of the oil under heavy loads settles down. Transformers' efficiency tends to improve with increasing transformer capacity.


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