What is meant by fringing flux?

Flux fringing - a phenomenon in which the magnetic flux flowing in a magnetic core spreads out (or fringes out) into the surrounding medium, for example in the vicinity of an air gap. Flux crowding is closely related to flux fringing, but flux leakage is usually treated as a different phenomenon.
A.

What is mutual flux in transformer?

Mutual inductance is where the magnetic flux of two or more inductors are “linked” so that voltage is induced in one coil proportional to the rate-of-change of current in another. A transformer is a device made of two or more inductors, one of which is powered by AC, inducing an AC voltage across the second inductor.
• What do you mean by leakage flux?

Leakage flux is defined as the magnetic flux which does not follow the particularly intended path in a magnetic circuit. Taking an example of solenoid you can explain the leakage flux and the fringing both. When a current is passed through a solenoid, magnetic flux is produced by it.
• What is the principle of mutual induction?

Mutual Inductance is the basic operating principal of the transformer, motors, generators and any other electrical component that interacts with another magnetic field. Then we can define mutual induction as the current flowing in one coil that induces a voltage in an adjacent coil.
• What is the use of step down transformer?

A transformer that increases voltage from primary to secondary (more secondary winding turns than primary winding turns) is called a step-up transformer. Conversely, a transformer designed to do just the opposite is called a step-down transformer.
B.

What is a leakage transformer?

Leakage Transformers are transformers where the magnetic flux of the secondary is loosely coupled to the flux of the primary. This loose coupling ensures that the transformer can withstand short circuit conditions.
• What is meant by mutual flux?

Mutual inductance is where the magnetic flux of two or more inductors are “linked” so that voltage is induced in one coil proportional to the rate-of-change of current in another. A transformer is a device made of two or more inductors, one of which is powered by AC, inducing an AC voltage across the second inductor.
• What is the reactance?

In electrical and electronic systems, reactance is the opposition of a circuit element to a change in current or voltage, due to that element's inductance or capacitance.
• What is fringing in a magnetic circuit?

The fringing effect results from the presence of the air gap in the magnetic circuit. The main consequence of the fringing effect is to make the magnetic flux density of the air gap different from the flux density of the core due to the path of the flux.
C.

What is the meaning of transformer impedance?

Definition. The percentage impedance of a transformer is the volt drop on full load due to the winding resistance and leakage reactance expressed as a percentage of the rated voltage. It is also the percentage of the normal terminal voltage required to circulate full-load current under short circuit conditions.
• What is impedance of a circuit?

Electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied. Impedance extends the concept of resistance to AC circuits, and possesses both magnitude and phase, unlike resistance, which has only magnitude.
• What is the purpose of a zigzag transformer?

A zigzag transformer is a special-purpose transformer with a zigzag or "interconnected star" winding connection, such that each output is the vector sum of two (2) phases offset by 120°.
• What is the purpose of grounding transformer?

A grounding transformer or an earthing transformer is used to provide a ground path to either an ungrounded way or a delta-connected system. Uses: It provides a relatively low-impedance path to ground, thereby maintaining the system neutral at or near ground potential.

Updated: 2nd October 2019