The air gaps of the relay in figure 1.2 are both 0.5 cm. the magnetic flux densities of the air gap and the core are assumed to be equal, ignoring the flux leakage and scattering effect. the relay core (including its pallet) is physically and structurally identical and of square cross-section, made of cast steel with the magnetization curve given in figure 1.1. the sides of the cross-sectional area are 4 em. other dimensions given in figure 1.2. the magnetic flux density is always required for the relay to pull the pallet and for the pallet to stay pulled. the number of turns of the relay is n=4480. for the relay to pull the pallet find how much current is required (to activate) (il-?). how much current is needed (i2-?) for the relay to remain on when its pallet is drawn (with the air gap closed) and this in this case, find what is the reluctance (r-?) of the core. find the magnetic circuit inductance (l-?) when the air gap of the relay is closed (activated) and the current i2 is drawn. your solution write the results you have found by doing it legibly, by drawing a box as below.
The air gaps of the relay in figure 1.2 are both 0.5 cm. the magnetic flux densities of the air gap and the core are assumed to be equal, ignoring the flux leakage and scattering effect. the relay core (including its pallet) is physically and structurally identical and of square cross-section, made of cast steel with the magnetization curve given in figure 1.1. the sides of the cross-sectional area are 4 em. other dimensions given in figure 1.2. the magnetic flux density is always required for the relay to pull the pallet and for the pallet to stay pulled. the number of turns of the relay is n=4480. for the relay to pull the pallet find how much current is required (to activate) (il-?). how much current is needed (i2-?) for the relay to remain on when its pallet is drawn (with the air gap closed) and this in this case, find what is the reluctance (r-?) of the core. find the magnetic circuit inductance (l-?) when the air gap of the relay is closed (activated) and the current i2 is drawn. your solution write the results you have found by doing it legibly, by drawing a box as below.
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter17: Commercial And Industrial Air-conditioning Control Systems
Section: Chapter Questions
Problem 12RQ
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The air gaps of the relay in figure 1.2 are both 0.5 cm. the magnetic flux densities of the air gap and the core are assumed to be equal, ignoring the flux leakage and scattering effect.
the relay core (including its pallet) is physically and structurally identical and of square cross-section, made of cast steel with the magnetization curve given in figure 1.1. the sides of the cross-sectional area are 4 em. other dimensions
given in figure 1.2. the magnetic flux density is always required for the relay to pull the pallet and for the pallet to stay pulled. the number of turns of the relay is n=4480. for the relay to pull the pallet
find how much current is required (to activate) (il-?). how much current is needed (i2-?) for the relay to remain on when its pallet is drawn (with the air gap closed) and this
in this case, find what is the reluctance (r-?) of the core. find the magnetic circuit inductance (l-?) when the air gap of the relay is closed (activated) and the current i2 is drawn. your solution
write the results you have found by doing it legibly, by drawing a box as below.
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3:08 pm
12/04/2023
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Step 1: Given information.
VIEWStep 2: Calculation of permeability of the magnetic core.
VIEWStep 3: Calculations of reluctances for the first subpart.
VIEWStep 4: Calculation of current for the first case.
VIEWStep 5: Calculations of equivalent reluctance for the second case.
VIEWStep 6: Calculation of current for the second case.
VIEWStep 7: Calculation of magnetic inductance for the second case.
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