hi from ukraine(adsbygoogle = window.adsbygoogle || []).push({});

i'm a electronic engineering student at kiev polytechnic university

i need your helps

how can i calculate this question

The steel winding with the number of coils w= 200 is put on thr ring-like closed

core in regular intervals.The section is rectangular. The external diameter of a ring

D=16 sm, the interval diameter d=10 sm, thickness b=4 sm.Magnetic induction B in

the core have to be equal 1 T1. How will current and magnetic resistance changes,

if the nonmagnetic (air) 'interval b=0.5 mm would be made. Magnetic flux has to be

constant.Define the relative magnetic permeability and magnetic resistance of the

ferromagnetic steel and sheet steel 1512 cores, if the magnetic flux in the interval

(theta)=1.2x1/1000 Wb. Dependence B(H) for steel is approximate to a such data:

0,2(80)0,4(185)0,6(300)0,8(460)1,0(750)1,2(1500)

i find three links http://www.classictesla.com/download/indu_pt_1.pdf

http://www.classictesla.com/download/indu_pt_2.pdf

http://www.technick.net/public/code/...nce_calculator [Broken]

but i couldn't calculate

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# Magnetic permeability and magnetic resistance

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