Magnetic Circuits - Equivalent Magnetic Circuits

[@robertpearson8546]

Your "equivalent magnetic circuits" are for small signals only. Large signals will cause the core to saturate. And hysteresis makes the small signals non-linear.

[@HarshKumar-jg3us]

Thanks, It helped me a lot.

[@EnergyConversionAcademy]

You are very welcome

[@legobuildingsrewiew7538]

First! I love this series!

[@EnergyConversionAcademy]

Thank you for your comment.

[@rayyan6939]

Nice lecture man.

[@EnergyConversionAcademy]

Glad you liked the lecture. Thanks.

[@insoleafptyptd3801]

Need clarification on the equation you used for resistance. Normally resistance is expressed as R=ρl/A or alternatively R=l/σA where ρ = 1/ σ. Conductivity is the reciprocal of resistivity and is normally represented by the greek letter sigma so is this what you mean't as resistivity is usually indicated by the greek letter rho.

[@EnergyConversionAcademy]

You are correct. It seems that I used wrong letter to represent and describe the conductivity. Yes I used rho instead of sigma. Thanks for your comment.

[@mustafaimad3109]

Dear Ehsan now we now that magnetic field intensity H is inversely proportional with L (Length) and reluctance proportional with L length, so in the example we see that length for nickel iron is more than two other medium so H for it is less than others, but what about reluctance it should be higher than others medium. is that right?

[@EnergyConversionAcademy]

Thank you for your question. In terms of the Reluctance, the reluctance is proportional to the length also it is inversely proportional to the permeability of the material (Note that In the example, the cross section area is same for all materials). So if we want to determine the Reluctance of each section, we need to calculate the the permeability first of each material (The permeability of section "a" is already calculated in the example), then calculate the reluctance of each section. Hope this explanation answers your question).

[@mustafaimad3109]

@@EnergyConversionAcademy thank u brother

[@mustafaimad3109]

Dear i have equations if the laminated isolated with varnish or paper how. The magnetic field will transfer

[@EnergyConversionAcademy]

Thank you for your question. The magnetic field will transfer or flow through the laminated magnetic core. So each sheet of magnetic material of the core will transfer or carry part of the magnetic field. Please review lecture 11 of chapter 1 (Eddy Currents ) and it may give better idea. Let me know if you need more explanation.