Welcome to electrical and electronics engineering discussion website, Please login or register to continue.

Welcome to electrical and electronics engineering Q&A site...

Join our WhatsApp group

in Unit 3 by
Explain hysteresis loss, eddy current loss and skin effect limitations with reference to magnetic material.
Join me on Google Pay, a secure app for money transfers, bills and recharges. Enter my code 908dq to earn ₹51 back on your first payment!

Please log in or register to answer this question.

1 Answer

0 votes
Best answer

Hysteresis loss:

Hysteresis loss is a loss which occurs due to the friction of magnetic domain due to the change in magnetic field in ferromagnetic material like iron. Hysteresis loss causes power loss and heat and insulation damage. The figure shows the hysteresis loop. if the loop is fat then hysteresis losses will be more and if the hysteresis loop is thin then hysteresis losses will be less. If the coercive force is high hysteresis loop will be fat and if the coercive force is low hysteresis loop will be thin. Hysteresis loss reduces the efficiency. Hysteresis loss cannot be completely removed but it can be reduced by choosing the material with less hysteresis loop area. Because less hysteresis loop area material will have low hysteresis loss.

Hysteresis loss in transformer is given by,

W= Kf (Bm)1.6 watts


Eddy current loss:

Eddy current also increases heat in the circuit. The loss due to eddy current is known as eddy current loss. Eddy current is caused due to the alternating current which induced emf and that induced emf produce current this current is called eddy current. 

Suppose a coil is wound on a core. An alternating current is applied to the coil. This alternating current to the coil will produce alternating flux. Now according to Faraday's law of electromagnetic induction, this changing flux will generate induced emf in the core. This induced emf will cause current to flow in the core. This flow of current is called eddy current and the losses due to eddy current are called eddy current loss. Eddy current causes I2R losses means heat. If there is a solid core with less resistance then eddy current will be high. Eddy current reduces the efficiency. Complete removal of eddy current is not possible but it can be reduced.


Eddy current can be reduced by using laminated core and by using the material with the high resistivity magnetic material. High resistivity magnetic material like silicon.

Eddy current loss in transformer is given by,


Skin effect limitations:

Amazon Shopping

Welcome to Q&A site for electrical and electronics engineering discussion for diploma, B.E./B.Tech, M.E./M.Tech, & PhD study.
If you have a new question please ask in English.
If you want to help this community answer these questions.


Most popular tags

power motor dc circuit transformer voltage current used system phase factor resistance load synchronous energy ac induction generator electric series frequency use speed capacitor between meter electrical line type mosfet control transmission difference magnetic plant high single instrument bjt source advantages function diode machine unit winding torque amplifier define supply thyristor motors arduino field shunt maximum relay armature problem electricity time parallel on transformers types coil diagram state flow value material three starting and direction theorem method emf operating digital microprocessor test instruments efficiency ratio loss measure operation connected low applications wave effect single-phase working losses different network wattmeter temperature measuring constant signal controlled breaker device full compare drive wire resistivity logic materials machines inductance switch flux disadvantages converter transistor gain protection scr angle force core measurement number free principle rc generators law negative bridge friction open pole conductor conservation steam iron loop resistors hysteresis short computer using lines secondary station battery rectifier inverter linear relays nuclear regulation circuits design analog work rotor electronics gate forces diesel damping rlc connection factors capacitors minimum insulation basic moving running reactance systems air fault range direct main stability quality starter igbt eddy ideal ammeter rl 3-phase plants arc induced thermal error fuzzy biasing dielectric pressure balanced superposition errors rotation characteristics feedback measured electronic start alternator off back curve over solar three-phase tariff locomotive peak bias zener capacitance commutator surge rating universal potentiometer permanent mechanical copper self transducer capacity electrons memory adc excitation inductive transfer explain fuse pure harmonics application internal pmmc average reaction welding resonance traction breakers designed electromagnetic si generation brushes density switching shaded rate impedance distribution methods star oscillator reluctance semiconductor inductor simplification algebra 8085 boolean weston dynamometer insulating strength installation permeability definition fuel heating earth units neutral rms rated engineering conductors coefficient controller usually reverse excited analysis change body components