Explain hysteresis loop, Electrical Engineering

Assignment Help:

Explain Hysteresis loop.

Hysteresis loop: In a ferromagnetic material, the flux density B raises while external applied magnetic field H to it is raised. When the saturation gets, the raise in flux ceases even though H may be raised. This has been demonstrated by OS in the figure. If the external field is slowly reduced, the original curves OS is not retraced although follows curve SR. The external field H is decreased to zero but B does not reduce to zero that is the material keeps magnetised. The value of R flux density is termed as remanent flux density or residual magnetism. So as to demagnetise the material completely, external magnetic field must be reversed and while this reaches the value OC in reverse direction, this is seen that B is zero. This applied reverse magnetising force that causes B to become zero is termed as coercive force. Additional increase of H in reverse direction will now rise in B in reverse direction and again at the point S saturation arises. The residual magnetism in reverse direction is represented through OR and to neutralise this H should be increased in positive direction to the value OC. Additional increase in H will again magnetise the material and saturation will arise at S. The characteristic of magnetic behaviour of the ferromagnetic material is above in property. When the material is taken by one complete cycle of magnetisation, this traces a loop termed as hysteresis loop. While a material is subjected to cyclic changes of magnetisation, the domains modify the direction of their orientation in accordance along with H. Work is completed in changing the direction of domains, that leads to production of heat in the material. The energy needed to take the material by one complete cycle of magnetisation is proportional to the area enclosed through the loop.

2295_Hysteresis loop.png

Hysteresis loop


Related Discussions:- Explain hysteresis loop

Unconditional return, Unconditional Return RET Instruction: This  instr...

Unconditional Return RET Instruction: This  instruction is used to transfer the program sequence  from subroutine to the calling  program unconditionally. The instruction forma

Calculate the magnetic flux in the core, Q. A toroid with a circular cross ...

Q. A toroid with a circular cross section is shown in Figure. It is made from cast steel with a relative permeability of 2500. The magnetic flux density in the core is 1.25 Tmeasur

General purpose diodes - types of power diodes , General Purpose Diodes ...

General Purpose Diodes The  general purpose  diodes  have relatively high reverse recovery time. The  diodes are general  made  by diffusion. They  are used  in low  speed  app

Bcd to excess 3 code converter, What are the industrial applications of the...

What are the industrial applications of the project bcd to excess 3 code converter?

Superposition, find current across r3 with two voltage as sources

find current across r3 with two voltage as sources

Calculate total resistance, Calculate total resistance among terminal A and...

Calculate total resistance among terminal A and B for the circuit below.

Calculate the current flow using norton theorem, Calculate the current flo...

Calculate the current flow in 30Ω resistor for the circuit in figure using Norton Theorem.

Transmission - salient features of nep, Transmission: The policy empha...

Transmission: The policy emphasizes in which adequate and timely investment along within efficient and coordinated operation is essential for developing a robust and integrate

Chemistry, explain why entropy of a gas increases with volume and tempeart...

explain why entropy of a gas increases with volume and tempearture

Determine the peak magnetizing current, A forward converter has the followi...

A forward converter has the following parameters: input source voltage V s = 100 V, N 1 /N 2 = N 1 /N 3 = 1, magnetizing inductance L m = 5 mH, output inductor L o = 200 μH, C

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd