Table of Contents
- 1 What are mutual and leakage fluxes in a transformer?
- 2 How can transformers prevent flux leakage?
- 3 What is flux in transformer?
- 4 How do we minimize leakage?
- 5 What is the relation between reluctance flux and MMF of the machine?
- 6 What is flux and flux linkage?
- 7 What is function of flux in transformer?
- 8 Is there leakage flux on no-load transformer?
- 9 Which is the useful flux in a transformer?
- 10 Is there always a leakage flux in a machine?
What are mutual and leakage fluxes in a transformer?
In a transformer, both primary and secondary currents produce flux. The flux Ф which links both the windings is the useful flux and is called mutual flux. The flux such as Ф1 or Ф2 which links only one winding is called leakage flux, shown below. …
How can transformers prevent flux leakage?
Statement ( A ) : Flux leakage in a transformer can be minimized by winding the primary and secondary coils one over the other.
What is leakage flux definition?
Leakage flux is defined as the magnetic flux which does not follow the particularly intended path in a magnetic circuit. When a current is passed through a solenoid, magnetic flux is produced by it.
What is flux in transformer?
The main flux is the flux found in the core at a point not under either the primary or secondary winding, and has been commonly considered as being the flux which causes the secondary induced voltage. …
How do we minimize leakage?
Minimizing Leakage Inductance To minimize leakage inductance, the primary winding should be wound on a long bobbin, or tube, with the secondary wound as close as possible, using a minimum of insulation.
What is leakage factor?
[′lēk·ij ‚fak·tər] (electromagnetism) The total magnetic flux in an electric rotating machine or transformer divided by the useful flux that passes through the armature or secondary winding. Also known as leakage coefficient.
What is the relation between reluctance flux and MMF of the machine?
In both AC and DC fields, the reluctance is the ratio of the magnetomotive force (MMF) in a magnetic circuit to the magnetic flux in this circuit. In a pulsating DC or AC field, the reluctance also pulsates (see phasors). (“R”) is the reluctance in ampere-turns per weber (a unit that is equivalent to turns per henry).
What is flux and flux linkage?
Flux vs Flux Linkage Flux is the amount of the field through a particular surface. Flux linkage is the fraction of the outgoing flux from the source to the captured flux from the drain.
What is the role of flux in transformer?
A transformer is an electromagnetic machine used to transfer electric energy between two circuits through a varying magnetic flux. When an AC source energizes a transformer, under no-load conditions, a small exciting current flows generating a mutual flux and heat losses in the core.
What is function of flux in transformer?
This magnetic flux links the turns of both windings as it increases and decreases in opposite directions under the influence of the AC supply. However, the strength of the magnetic field induced into the soft iron core depends upon the amount of current and the number of turns in the winding.
Is there leakage flux on no-load transformer?
On no-load, there is no current in secondary and therefore no leakage flux exists across it. On load leakage flux φL2 is in phase with I2 and produces self-induced e.m.f. L2 = self-inductance of the secondary winding produced by secondary leakage flux φL2.
How to calculate leakage reactance of a transformer?
On load leakage flux φL2 is in phase with I2 and produces self-induced e.m.f. L2 = self-inductance of the secondary winding produced by secondary leakage flux φL2. By knowing the leakage reactance of the primary and secondary winding of the transformer. We can calculate the total leakage reactance of a transformer.
Which is the useful flux in a transformer?
In a transformer, both primary and secondary currents produce flux. The flux Ф which links both the windings is the useful flux and is called mutual flux. However, primary current would produce some flux Ф1 which would not link the secondary winding. Similarly, secondary winding would produce Ф2 that would not link the primary winding.
Is there always a leakage flux in a machine?
Hence, there always exists a leakage flux in machine. Leakage flux is represented by inductive reactances in series with winding resistances as shown below. Lets see how we reached this conclusion. The mmf N1I1 would produce leakage flux Ф1 which would be in phase with the current I1 , shown by the magnetisation curve of the air.