Table of Contents
What is alternating flux in transformer?
The flux alternating flux produced in the transformer links the coils in the secondary winding and hence emf is induced in the secondary winding. Whenever an ac supply is given to the primary coil, flux is produced in the coil. These flux links with the secondary winding thereby inducing emf in the secondary coil.
What is flux in a transformer?
Transformers are static devices that transfer energy from one set of coils to another through a varying magnetic flux, provided that both sets are on a common magnetic circuit (core). A change in the magnitude of flux linkages with time induces electromotive forces (Figure 1).
What is function of flux in transformer?
The magnetic flux passes through the secondary coil with the help of the iron core. Thus, at the secondary side of the transformer, the output AC voltage (induced voltage) can be taken with the desired AC current. The ratio of the number of turns N1/N2 is decisive for the change in power or AC voltage and current.
Why is AC used in transformers?
Transformer only works in AC supply because for induction process, it is necessary to present change of flux. And in DC supply there will be no flux change phenomenon happen so induction process couldn’t be happen. That’s why transformer is used in AC supply.
What is EMF per turn?
Induced emf per turn = rate of change of flux per turn. Therefore, average emf per turn = 4f Φm ………. (Volts). Now, we know, Form factor = RMS value / average value. Therefore, RMS value of emf per turn = Form factor X average emf per turn.
Is flux constant in transformer?
Yes, the core flux in the transformer remains constant whatever the load condition if we neglect leakage flux in the primary as well as secondary winding.
Is a transformer AC or DC?
A transformer is a device which step-up or step-down the level of AC current or voltage without changing the primary (i.e. input source) frequency. Transformer only works on AC and can’t be operated on DC i.e. it has been designed to be operated only and only on alternating current and voltage.
How does AC transformer work?
When applying AC current to the primary winding of the transformer, the coil creates a pulsing magnetic field. Once the magnetic field reaches the secondary coil, it forces the electrons within it to move, creating an electric current via electromotive force (EMF).
What is E in a transformer?
from the above equations 1 and 2, This is called the emf equation of transformer, which shows, emf / number of turns is same for both primary and secondary winding. For an ideal transformer on no load, E1 = V1 and E2 = V2 . where, V1 = supply voltage of primary winding. V2 = terminal voltage of secondary winding.