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For the series-parallel magnetic circuit in Fig. 12.45, find the value of I required to establish a flux in the gap of
Area for sections other than
Fig. 12.45
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Laboratory Manual for Introductory Circuit Analysis
- A magnetic circuit consists of an iron ring of mean circumference 80 cm with cross-sectional area 12cm2 throughout. A current of 2A in the magnetising coil of 200 turns produces a total flux of 1.2mWb in the iron. Calculate : (a) the flux density in the iron(b) the absolute and relative permeabilities of iron(c) the reluctance of the circuit [ANSWER: 1 Wb/m2 ; 0.002, 1,590 ; 3.33 × 105 AT/Wb]arrow_forwardAn infinitely long straight conductor with a circular cross section of radius b carries a steady current I. Let I=3 A, b=2 cm. Calculate magnetic flux density outside the conductor at a distance of r=5 cm .(Use Amper’s Circuital Law) Lütfen birini seçin: a. 2.4x10-5 T b. 1.2x10-5 T c. 5.5x10-5 T d. 4.8x10-5 T e. 6.9x10-5 Tarrow_forwardBar type CT has the following parameters:CT ratio = 2000/5 AMaximum primary current = 40 kAMaximum flux density in the core = 1.6 TImpedance (Actual burden) = 0.31 ΩCore cross sectional area = 20 cm2Find the maximum burden permissible if no saturation occurs.arrow_forward
- 11. The eddy current loss of a given solid core is 80 W at 50 Hz. What would be the loss of 60 Hz if the core flux density remained the same at the two frequencies. Answer: 115.2 W a. 55.55 W b. 66.67 W c. 96 W d. 115.2 Warrow_forward5-5.When one coil of a magnetically coupled pair has a current 5.0 A the resulting fluxes ?11and ?12 are 0.2mWb and 0.4mWb, respectively. If the turns are N1= 500 and N2=1500, find L1, L2, M, and the coefficient of coupling karrow_forwardCalculate the core area in Cm 2 required for a 1600kVA, 6600/440 V, 50Hz single phasetransformer. Assume maximum flux density of 1.2 Wb/m 2 and induced voltage per turn 0f30Varrow_forward
- ) A conductor moves with a velocity of 15 m/s at an angle of (a) 90◦, (b) 60◦ and (c) 30◦ to a magnetic field produced between two square-faced poles of side length 2 cm. If the flux leaving a pole face is 5 μWb, find the magnitude of the induced e.m.f. in each case. (b) Determine the delta-connected equivalent network for the star-connected impedances shown inarrow_forward13. A non-magnetic ring having a cross-sectional area of 10 cm2 is uniformly wound with 300 turns of a given wire. If a current of 1 A is passed through the coil, 2.4 µWb of flux generated inside the ring. Determine the average diameter of the ring.arrow_forwardThe insulation resistance of a single-core cable is 432 Mohm per km. If the core diameter is 2.87 cm and resistivity of insulation is 5.1 x 10^14 ohm-cm, find the insulation thickness.arrow_forward
- (b) A coil of insulated wire of 500 turns and of resistance 5ohm is closely wound on an iron ring. The ring hasa mean diameter of 0.5 m and a uniform cross-sectional area of 600 sq.mm. Calculate the total flux in thering when a d.c. supply of 6 V is applied to the ends of the winding. Assume a relative permeability of 560.arrow_forwardIn the magnetic circuit, the magnetic permeability of the iron media is infinite. In the middle leg where the winding is located, B=0,23 Wb / m2 from forming a flux of wanted. Calculate the winding current and winding inductance accordingly. Winding winding N = 600 turns, the cross-sectional area of the surface through which the magnetic flux passes in both airs A = 3 cm2 and the magnetic permeability coefficient of the gap is μ0=4π10-7 H / m. g1: 2 g2: 4arrow_forwardConsider a ferromagnetic ring (nucleus) that has a mean circumference of 40 cm, 300coiled copper turns and a sectional area of 5 cm2. A current of 2 is appliedA to winding, producing a flux of 1.5 mWb.Determine the permeability of the core material.Determine the relative permeability of the core material.If the ferromagnetic ring has an air gap of 2 mm. Find the required MMFso that the flux density in the gap is 0.5 T.arrow_forward
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