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Advanced Virtual Lab on Electrical Machines
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Concepts of reluctance, flux, flux density and mmf
Problem overview Back to Virtual Lab
Consider the system shown in Figure1. The parameters of the system are as follows:
(1) The relative permeability of the ferromagnetic core is:

μr=80000

(2) The input voltage:

Vin=10V

(3) Number of turns in the coil:

N=200

(4) Mean length of the flux lines travelling in the ferromagnetic material:

lmean=50cm

(5) Area of cross section of the core

Acore=5cm2

(6) The air gap length:

g=20mm



The coil is connected to a variable resistance and the resistance is varied according to following sequence: