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94 Exercise :4.A square magnetic core Figure :4. has four 0.5 mm air gaps. The core...
Prob.l. A rectangular magnetic core shown in the below Fig, has square cross-section of area 16...
Prob.l. A rectangular magnetic core shown in the below Fig, has square cross-section of area 16 cm". An air-gap of 2 mm is cut across one of its limbs. Find the exciting current needed in the coil having 1000 turns wound on the core to create an airgap mu of 4 m Wb. The relative permeability of the core is 2000. N=1000 2 mm 25 cm - - 20 cm
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...
Magnetic Circuits y Part A - Calculate reluctances Learning Goal: To understand how magnetic structures can...
Magnetic Circuits y Part A - Calculate reluctances Learning Goal: To understand how magnetic structures can be analyzed by drawing an equivalent circuit, and to use the equivalent circuit to calculate magnetic fluxes and coll currents. When analyzing magnetic structures, the geometry is often complex enough that using the fundamental rules can be very difficult without numerical methods. However, there are approximate methods that are often sufficient for engineering calculations. When the magnetic field is mostly contained within cores of...
4. Referring to Figure 26.0, a magnetic circuit core is made of stalloy and has and...
4. Referring to Figure 26.0, a magnetic circuit core is made of stalloy and has and air gap of 1.2 mm. An exciter coil of 400-turn is wound at the center limb. The center limb cross sectional area is 1600 mm and the cross sectional area of both sides of limb is 1000mm?. Calculate the current required to establish a flux of 1000 uWb in the air gap. Neglect fringing effect and flux leakage. The B-H curve for stalloy is...
[Magnetic circuits – 20 points] A two-legged magnetic core with an airgap is shown in the...
[Magnetic circuits – 20 points] A two-legged magnetic core with an airgap is shown in the below figure. The cross-sectional area of the core is A. = 20 cm?, the mean length of the core is l. =80 cm, and the length of the airgap is 0.06 cm. The number of turns on the coil is 200. The relative permeability of the core can be assumed to be constant and equal to 2000. The fringing effect causes a 6% increase...
- 8 cm 8 cm 0.5 cm N=500 Consider the magnetic core with an air gap...
- 8 cm 8 cm 0.5 cm N=500 Consider the magnetic core with an air gap as shown in Figure Q3. The core material has a relative permeability of 6000 and a rectangular cross section 2cm x 3cm. The coil has 500 turns. Given that permeability of free space is Ho = 41 x 10-7. a) Lukiskan litar magnet yang berkenaan. Draw the equivalent magnetic circuit. (2 markah/marks) b) Tentukan keratan rentas (Acore) dan engganan (Rcore) untuk teras. Determine the...
3. [Magnetic circuits – 20 points] A two-legged magnetic core with an airgap is shown in...
3. [Magnetic circuits – 20 points] A two-legged magnetic core with an airgap is shown in the below figure. The cross-sectional area of the core is A = 20 cm², the mean length of the core is l. =80 cm, and the length of the airgap is 0.06 cm. The number of turns on the coil is 200. The relative permeability of the core can be assumed to be constant and equal to 2000. The fringing effect causes a 6%...
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...
A toroidal core has distributed air-gaps that make the relative permeability ur equal to 75. The...
A toroidal core has distributed air-gaps that make the relative permeability ur equal to 75. The cross-sectional area is 0.395 cm2 and the mean path length is 5.78cm. Calculate the number of turns required to obtain an inductance of 50uH.
02 (10 р.): The magnetic circuit shown is made of laminated core of cast steel. Each...
02 (10 р.): The magnetic circuit shown is made of laminated core of cast steel. Each lamination is a square with the dimensions shown in the figure (not to scale). The gap length, g, is 0.1 cm, the cross section of the core is a square. The coil has 750 turns. (a) Calculate the needed current in the coil to produce a flux of 2.16 m Wb in the airgap. (b) Answer question (a) assuming a stacking factor of 0.5455....
Prob.l. A rectangular magnetic core shown in the below Fig, has square cross-section of area 16 cm". An air-gap of 2 mm is cut across one of its limbs. Find the exciting current needed in the coil having 1000 turns wound on the core to create an airgap mu of 4 m Wb. The relative permeability of the core is 2000. N=1000 2 mm 25 cm - - 20 cm
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...
Magnetic Circuits y Part A - Calculate reluctances Learning Goal: To understand how magnetic structures can be analyzed by drawing an equivalent circuit, and to use the equivalent circuit to calculate magnetic fluxes and coll currents. When analyzing magnetic structures, the geometry is often complex enough that using the fundamental rules can be very difficult without numerical methods. However, there are approximate methods that are often sufficient for engineering calculations. When the magnetic field is mostly contained within cores of...
4. Referring to Figure 26.0, a magnetic circuit core is made of stalloy and has and air gap of 1.2 mm. An exciter coil of 400-turn is wound at the center limb. The center limb cross sectional area is 1600 mm and the cross sectional area of both sides of limb is 1000mm?. Calculate the current required to establish a flux of 1000 uWb in the air gap. Neglect fringing effect and flux leakage. The B-H curve for stalloy is...
[Magnetic circuits – 20 points] A two-legged magnetic core with an airgap is shown in the below figure. The cross-sectional area of the core is A. = 20 cm?, the mean length of the core is l. =80 cm, and the length of the airgap is 0.06 cm. The number of turns on the coil is 200. The relative permeability of the core can be assumed to be constant and equal to 2000. The fringing effect causes a 6% increase...
- 8 cm 8 cm 0.5 cm N=500 Consider the magnetic core with an air gap as shown in Figure Q3. The core material has a relative permeability of 6000 and a rectangular cross section 2cm x 3cm. The coil has 500 turns. Given that permeability of free space is Ho = 41 x 10-7. a) Lukiskan litar magnet yang berkenaan. Draw the equivalent magnetic circuit. (2 markah/marks) b) Tentukan keratan rentas (Acore) dan engganan (Rcore) untuk teras. Determine the...
3. [Magnetic circuits – 20 points] A two-legged magnetic core with an airgap is shown in the below figure. The cross-sectional area of the core is A = 20 cm², the mean length of the core is l. =80 cm, and the length of the airgap is 0.06 cm. The number of turns on the coil is 200. The relative permeability of the core can be assumed to be constant and equal to 2000. The fringing effect causes a 6%...
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...
02 (10 р.): The magnetic circuit shown is made of laminated core of cast steel. Each lamination is a square with the dimensions shown in the figure (not to scale). The gap length, g, is 0.1 cm, the cross section of the core is a square. The coil has 750 turns. (a) Calculate the needed current in the coil to produce a flux of 2.16 m Wb in the airgap. (b) Answer question (a) assuming a stacking factor of 0.5455....
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