Transformers
14 هزار بار بازدید -
4 سال پیش
-
TransformersTransformer is a device which
Transformers
Transformer is a device which works under the principles of mutual induction. Transformer is used either to step up a low AC voltage or to step down an AC voltage.
A transformer has a primary coil and a secondary coil in it, these coils are in the form of a solenoid which is wounded over a common soft iron core. AC with a particular voltage is send to the coil as input. The coil which carries the input ac is called primary coil. The coil which carries output voltage is called secondary coil.
Let’s see how this input voltage is transferred from primary coil to secondary coil. The transfer of electric energy from one coil to another is carried out by electromagnetic induction. Input AC in the primary coil creates magnetic flux in the soft iron core. The intensity and direction of the ac coil are continuously changing and due to this the induced flux is also a fluctuating one. Even though the secondary windings are in the same soft iron core and flux also passes through each windings in the coil. Due to the change in magnetic flux in the secondary coil there induces an emf. Thus, because of electromagnetic induction, the electrical energy from one coil transfers to another.
Generally, there are two types of transformers. They are step up and step down transformers.
Step up transformers
The step-up transformers convert low AC voltage to high voltage. In this, the primary windings are made up of thick wire and having less number of turns .But the secondary windings are made by thin wire and having more number of turns.
Step down transformers
The step down transformers convert a high AC voltage to low AC voltage. In this primary coils are made up of thin wires with maximum number of turns and secondary coils are made up of thick wires and having less number of turns.
The number of turns of the transformers and the induced emf are interrelated. Mathematically it can be written as
Vs / Vp = Ns/ Np
Transformer is a device which works under the principles of mutual induction. Transformer is used either to step up a low AC voltage or to step down an AC voltage.
A transformer has a primary coil and a secondary coil in it, these coils are in the form of a solenoid which is wounded over a common soft iron core. AC with a particular voltage is send to the coil as input. The coil which carries the input ac is called primary coil. The coil which carries output voltage is called secondary coil.
Let’s see how this input voltage is transferred from primary coil to secondary coil. The transfer of electric energy from one coil to another is carried out by electromagnetic induction. Input AC in the primary coil creates magnetic flux in the soft iron core. The intensity and direction of the ac coil are continuously changing and due to this the induced flux is also a fluctuating one. Even though the secondary windings are in the same soft iron core and flux also passes through each windings in the coil. Due to the change in magnetic flux in the secondary coil there induces an emf. Thus, because of electromagnetic induction, the electrical energy from one coil transfers to another.
Generally, there are two types of transformers. They are step up and step down transformers.
Step up transformers
The step-up transformers convert low AC voltage to high voltage. In this, the primary windings are made up of thick wire and having less number of turns .But the secondary windings are made by thin wire and having more number of turns.
Step down transformers
The step down transformers convert a high AC voltage to low AC voltage. In this primary coils are made up of thin wires with maximum number of turns and secondary coils are made up of thick wires and having less number of turns.
The number of turns of the transformers and the induced emf are interrelated. Mathematically it can be written as
Vs / Vp = Ns/ Np
4 سال پیش
در تاریخ 1399/03/15 منتشر شده
است.
14,028
بـار بازدید شده