Definition of Transformer:
Transformers are commonly used in applications which require the conversion of AC voltage from one voltage level to another (Step Up or Step Down),without changing frequency or constant frequency.or
A transformer is a static electrical machine used for deliver power from one circuit to another without electrical coupling at constant frequency.
Working Principle Of Transformers:-
Transformers works on the principle of mutual induction.An important property of electricity is that a magnetic field is produced around a wire in which electrical current is flowing.The more current that flows, the stronger is the magnetic field. An even stronger magnetic field can be produced by winding the wire into a coil. Now the magnetic fields of adjacent wires add together to form one strong magnetic field. When a magnetic field moves across a wire, a voltage is induced into the wire.This is the most basic concept of the theory of transformer.
Here we take two coils named primary and secondary as shown in above figure,flux produces due to voltage in primary and voltage produce due to flux in core by following mutual induction.
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| Mutual Induction In Coils |
Mutual induction:-If the wire forms a complete circuit, current will flow in the wire. If a second coil of wire is placed in a moving magnetic field, then a voltage will be induced in this second coil. This phenomenon is called mutual induction.
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| Internal construction of transformers |
-Electrical energy is converted into magnetic field and then converted back into electrical energy in a second winding,with little or no loss of energy.
The three main parts of a transformer are,
1.Primary Winding of transformer - which produces magnetic flux when it is connected to electrical source.
2.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.
3.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.
| Also Read: Buchholz Relay - Construction, Working OC & SC Test On Transformers |
Main Constructional Parts of Transformer:
The three main parts of a transformer are,
1.Primary Winding of transformer - which produces magnetic flux when it is connected to electrical source.
2.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.
3.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.
Types Of Power Transformer:-
Step Up Transformer:- This type of transformers we can only at power generation places to step up,because we generate power with low voltage if we transmit low power losses will be high,so to reduce transmission losses we step up the voltage.transformers used to step up the voltage are called Step Up Transformers.
Step Down Transformer:-Transformers used to step down the voltage are called Step Down Transformers. we find at streets,sub stations,industries.
Uses of Power Transformer:-
-Transformer can rise or lower the level of level of Voltage or Current ( when voltage increases, current decreases and vice virsa because P =V x I, and Power is same ) in an AC Circuit.
-Used in reduction of capital cost of the system and it also improves the voltage regulation of the transmission system.
-Transformer can increase or decrease the value of capacitor, an inductor or resistance in an AC circuit. It can thus act as an impedance transferring device.
-Transformer can be used to prevent DC from passing from one circuit to the other.
-Transformer can isolate two circuits electrically.
Tags:what is transformer and its types,types of transformer,power transformer pdf,step up and step down transformer,types of transformer windings,electrical transformers types,applications of transformers,transformer working principle pdf
Tags:what is transformer and its types,types of transformer,power transformer pdf,step up and step down transformer,types of transformer windings,electrical transformers types,applications of transformers,transformer working principle pdf
