Electrical engineers

Theory of Transformer on Load and off Load Operation We have discussed about the theory and their phasor diagram of ideal transformer for better understanding of actual elementary theory of transformer . Now we will go through the practical aspects one by one of an electrical power transformer and try to draw vector diagram of transformer in every step. As we said that, in an ideal transformer; there are no core losses in transformer i.e. loss free core of transformer. But in practical transformer, there are hysteresis and eddy current losses in transformer core. Theory of Transformer on off-Load Having No Winding Resistance and No Leakage Reactance Let us consider one electrical transformer with only core losses, which means, it has only core losses but no copper loss and no leakage reactance of transformer . When an alternating source is applied in the primary, the source will supply the current for magnetizing the core of transformer .But this current is not the actual magn

EMF Equation of Transformer Turns Voltage Transformation Ratio of Transformer  Emf Equation of Transformer EMF Equation of transformer can be established in a very easy way. Actually in electrical power transformer , one alternating electrical source is applied to the primary winding and due to this, magnetizing current flowing through the primary winding which produces alternating flux in the core of transformer . This flux links with both primary and secondary windings. As this flux is alternating in nature, there must be a rate of change of flux. According to Faraday’s law of electromagnetic induction if any coil or conductor links with any changing flux, there must be an induced emf in it. As the current source to primary is sinusoidal, the flux induced by it will be also sinusoidal. Hence, the function of flux may be considered as a sine function. Mathematically, the derivative of that function will give a function for the rate of change of flux linkage with respect to time.

Transformer Construction The three main parts of a transformer: Primary Winding of Transformer Magnetic Core of Transformer Secondary Winding of Transformer Primary Winding of Transformer Which produces magnetic flux when it is connected to an electrical source . Magnetic Core of Transformer The magnetic flux produced by the primary winding, that will pass through this low reluctance path linked with secondary winding and create a closed magnetic circuit . Secondary Winding of Transformer The flux, produced by primary winding, passes through the core, will link with the secondary winding. This winding also wounds on the same core and gives the desired output of the transformer .

What is a Transformer? A  transformer  is defined as a  passive electrical device  that transfers electrical energy from one circuit to another through the process of  electromagnetic induction . It is most commonly used to increase (‘step up’) or decrease (‘step down’)  voltage  levels between circuits. Working Principle of Transformer The working principle of a transformer is very simple. Mutual induction between two or more windings (also known as coils) allows for electrical energy to be transferred between circuits. This principle is explained in further detail below. Transformer Theory Say you have one winding (also known as a coil) which is supplied by an alternating electrical source. The alternating current through the winding produces a continually changing and alternating flux that surrounds the winding. If another winding is brought close to this winding, some portion of this alternating flux will link with the second winding. As this flux is continually changing in its a