(b) Figure Q3(b) shows a magnetic circuit with two different material, with a mean cross- sectional area of 25 cm?. The mean core length of steel, Lsı and Ls2 is 20 cm and 15 cm, respectively. The mean core length of iron, Ln and Ln is 20 cm and 14 cm, respectively. The air gap length, Lag is 1 cm. Relative permeability of steel and iron is 7000 and 4000 respectively. Fringing effect is excluded. Calculate: Steel Iron Ls1. L12 N2 Lag Steel N1 Iron LI1 Ls2 Figure Q3(b) (i) Total reluctances of this magnetic circuit. (ii) Total magnetomotive force required to produced 60 µWb of flux across the air- gap. (iii) Number of turns in coil 1, N1 if both electrical source supply the same amount of current, 5A, assume N1 = N2. 2)

(b) Figure Q3(b) shows a magnetic circuit with two different material, with a mean cross- sectional area of 25 cm?. The mean core length of steel, Lsı and Ls2 is 20 cm and 15 cm, respectively. The mean core length of iron, Ln and Ln is 20 cm and 14 cm, respectively. The air gap length, Lag is 1 cm. Relative permeability of steel and iron is 7000 and 4000 respectively. Fringing effect is excluded. Calculate: Steel Iron Ls1. L12 N2 Lag Steel N1 Iron LI1 Ls2 Figure Q3(b) (i) Total reluctances of this magnetic circuit. (ii) Total magnetomotive force required to produced 60 µWb of flux across the air- gap. (iii) Number of turns in coil 1, N1 if both electrical source supply the same amount of current, 5A, assume N1 = N2. 2)

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

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Similar questions

An air gap has a length of 0.1 cm. What length of iron core has the same reluctance as the air gap? The relative permeability of the iron is 5000. Assume that the cross-sectional areas of the gap and the core are the same.
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(b) Figure Q3(b) shows a magnetic circuit with two different material. with a mean cross- sectional area of 25 cm?. The mean core length of steel, Ls1 and Ls2 is 20 cm and 15 cm, respectively. The mean core length of iron, Li1 and Lp is 20 cm and 14 cm, respectively. The air gap length, Lag is 1 cm. Relative permeability of steel and iron is 7000 and 4000 respectively. Fringing effect is excluded. Calculate; Steel Iron Ls1. I2 N2 Steel N1 Iron L11 Ls2. Figure Q3(b) (i) Total reluctances of this magnetic circuit. (ii) Total magnetomotive force required to produced 60 µWb of flux across the air- gap. (iii) Number of turns in coil 1, N1 if both electrical source supply the same amount of current, 5A, assume N1 = N2.
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