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Consider the iron structure in the figure...
2. The magnetic circuit of Fig. 1 consists of rings of magnetic material in a stack...
2. The magnetic circuit of Fig. 1 consists of rings of magnetic material in a stack of height h. The rings have inner radius Ri and outer radius Ro. Assume that the iron is of infinite permeability (μ → x) and neglect the effects of magnetic leakage and fringing Ri N turns For Ri-3.2 cm, Roー4.1 cm, ћ-1.8 cm, g = 0.15 cm, N-72 turns, calculate a. The mean core length le and the core corss-sectional area Ac. b. The...
94 Exercise :4.A square magnetic core Figure :4. has four 0.5 mm air gaps. The core...
94 Exercise :4.A square magnetic core Figure :4. has four 0.5 mm air gaps. The core material has a relative permeability of us = 800 and a coil of 1400 turns is wound around it. The core has a square cross-sectional area of dimensions 4 cm and a magnetic path length (including the air gaps) is 20 cm. A = 4 cm 2 N = 1400 4 Air gaps = 0.5 mm each Figure : 4. = 20 cm including...
QUESTION 2 a) Given a magnetic circuit as shown in Figure Q2 where its core is...
QUESTION 2 a) Given a magnetic circuit as shown in Figure Q2 where its core is cast steel. The center limb has a cross-sectional area of 800mm2 and the other side limbs have a cross sectional area of 500mm2. The effective air gap length, lac is Imm, core length, loc= 150mm . ladb = laeb = 340mm . A coil of 400 turns is wound on the center limb. Neglect any magnetic leakage and fringing effect. i. Draw the equivalent...
ET 103 - ELECTRICAL MACHINES I Assignment 01 QUESTION # 04 A ferromagnetic core with a...
ET 103 - ELECTRICAL MACHINES I Assignment 01 QUESTION # 04 A ferromagnetic core with a relative permeability of 1500 is shown in Figure The dimensions are as shown in the diagram, and the depth of the core is 5 cm. The air gaps on the left and right sides of the core are 0.050 and 0.070 cm, respectively. Because of fringing effects, the effective area of the air gaps is 5 percent larger than their physical size. If there...
B.1. Figure B.1 shows a magnetic circuit whose parameters are specified in the table below. For a coil of 800 turns carrying 1.5 amp, determine the flux densities in each material, the inductance of...
B.1. Figure B.1 shows a magnetic circuit whose parameters are specified in the table below. For a coil of 800 turns carrying 1.5 amp, determine the flux densities in each material, the inductance of the coil, the energy storage of the circuit, and the force between the faces of the air gap. Leakage flux and fringing at the air gap will be neglected Material Length Area 15.24 cm 3.23 cm2 300 15.24 cm 3.23 cm2 500 50.8 cm6.45 cm2 1000...
For problem f), the current value is not on the picture. How to find the force...
For problem f), the current value is not on the picture. How
to find the force and get the flux without current since F=Ni. Same
for problem g)
5. (34 points) A ferromagnetic core with a constant relative permeability of 2000 is shown in the following figure. The core depth is 6 cm, and all dimensions are as shown in the figure. The air gap length on the leftmost column of the core is 0.01 cm. Because of fringing effects,...
6) Figure Q4(b) shows a coils of 200 turns. The coil is uniformly wound around a...
6) Figure Q4(b) shows a coils of 200 turns. The coil is uniformly wound around a wooden ring with a mean circumference of 600mm and cross-section area of 500mm%. The current flowing into the call is 4A. (Permeability of free space fle = 4ex 10' Hm'. Calculate: L. the magnetic field strength (2 marks) flux density (1 marks) total flux (1 marks) turn I meter Figure Q4 (b) A magnetic circuit made of cast steel is arranged as in Figure...
EO Vuy vvvvvvvv NTurns 93 The relative permeability of the core material is 3500, and the...
EO Vuy vvvvvvvv NTurns 93 The relative permeability of the core material is 3500, and the average length of the core is 52cm as the cross- section of the core is 64cm2. The core is uniform of cross-section (all limbs have the same cross-section). There are 80 turns on the coil. Answer the following questions, 1) The reluctance of the core (AT/Wb) 2) Find the flux density (T) of the core if the current į in the coil is 0.75...
b) A portion of a solenoid is shown as in Figure Q3(b). The magnetic circuit comprises...
b) A portion of a solenoid is shown as in Figure Q3(b). The magnetic circuit comprises of cast iron yoke, sheet steel plunger, cast steel plunger and air gaps. The yoke and plunger have a cross section area of 4.8x10 m´and 4.5x10m respectively. A coil is wound on the center of the yoke. The effective length of the cast iron yake, sheet steel plunger and cast steel plunger are la = 0.25 m; 4 = 0.12 m and l =...
Question 7 A magnetic core is shown in Figure 1. Relative permeability of the core is...
Question 7 A magnetic core is shown in Figure 1. Relative permeability of the core is 14 = 2000. Total number of winding turns in the left winding is NL = 100 and in the right winding is Nr = 10. Assume that the core cross section is uniform and the combined length of all air-gaps is much smaller than the dimensions of the core cross-section. Calculate the following: a) The magnetomotive force in the core if i = 2...
2. The magnetic circuit of Fig. 1 consists of rings of magnetic material in a stack of height h. The rings have inner radius Ri and outer radius Ro. Assume that the iron is of infinite permeability (μ → x) and neglect the effects of magnetic leakage and fringing Ri N turns For Ri-3.2 cm, Roー4.1 cm, ћ-1.8 cm, g = 0.15 cm, N-72 turns, calculate a. The mean core length le and the core corss-sectional area Ac. b. The...
94 Exercise :4.A square magnetic core Figure :4. has four 0.5 mm air gaps. The core material has a relative permeability of us = 800 and a coil of 1400 turns is wound around it. The core has a square cross-sectional area of dimensions 4 cm and a magnetic path length (including the air gaps) is 20 cm. A = 4 cm 2 N = 1400 4 Air gaps = 0.5 mm each Figure : 4. = 20 cm including...
QUESTION 2 a) Given a magnetic circuit as shown in Figure Q2 where its core is cast steel. The center limb has a cross-sectional area of 800mm2 and the other side limbs have a cross sectional area of 500mm2. The effective air gap length, lac is Imm, core length, loc= 150mm . ladb = laeb = 340mm . A coil of 400 turns is wound on the center limb. Neglect any magnetic leakage and fringing effect. i. Draw the equivalent...
ET 103 - ELECTRICAL MACHINES I Assignment 01 QUESTION # 04 A ferromagnetic core with a relative permeability of 1500 is shown in Figure The dimensions are as shown in the diagram, and the depth of the core is 5 cm. The air gaps on the left and right sides of the core are 0.050 and 0.070 cm, respectively. Because of fringing effects, the effective area of the air gaps is 5 percent larger than their physical size. If there...
B.1. Figure B.1 shows a magnetic circuit whose parameters are specified in the table below. For a coil of 800 turns carrying 1.5 amp, determine the flux densities in each material, the inductance of the coil, the energy storage of the circuit, and the force between the faces of the air gap. Leakage flux and fringing at the air gap will be neglected Material Length Area 15.24 cm 3.23 cm2 300 15.24 cm 3.23 cm2 500 50.8 cm6.45 cm2 1000...
For problem f), the current value is not on the picture. How
to find the force and get the flux without current since F=Ni. Same
for problem g)
5. (34 points) A ferromagnetic core with a constant relative permeability of 2000 is shown in the following figure. The core depth is 6 cm, and all dimensions are as shown in the figure. The air gap length on the leftmost column of the core is 0.01 cm. Because of fringing effects,...
6) Figure Q4(b) shows a coils of 200 turns. The coil is uniformly wound around a wooden ring with a mean circumference of 600mm and cross-section area of 500mm%. The current flowing into the call is 4A. (Permeability of free space fle = 4ex 10' Hm'. Calculate: L. the magnetic field strength (2 marks) flux density (1 marks) total flux (1 marks) turn I meter Figure Q4 (b) A magnetic circuit made of cast steel is arranged as in Figure...
EO Vuy vvvvvvvv NTurns 93 The relative permeability of the core material is 3500, and the average length of the core is 52cm as the cross- section of the core is 64cm2. The core is uniform of cross-section (all limbs have the same cross-section). There are 80 turns on the coil. Answer the following questions, 1) The reluctance of the core (AT/Wb) 2) Find the flux density (T) of the core if the current į in the coil is 0.75...
b) A portion of a solenoid is shown as in Figure Q3(b). The magnetic circuit comprises of cast iron yoke, sheet steel plunger, cast steel plunger and air gaps. The yoke and plunger have a cross section area of 4.8x10 m´and 4.5x10m respectively. A coil is wound on the center of the yoke. The effective length of the cast iron yake, sheet steel plunger and cast steel plunger are la = 0.25 m; 4 = 0.12 m and l =...
Question 7 A magnetic core is shown in Figure 1. Relative permeability of the core is 14 = 2000. Total number of winding turns in the left winding is NL = 100 and in the right winding is Nr = 10. Assume that the core cross section is uniform and the combined length of all air-gaps is much smaller than the dimensions of the core cross-section. Calculate the following: a) The magnetomotive force in the core if i = 2...
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