A 4-79 permalloy solenoid coil needs to produce a minimum inductance of 1.5 Wb/m2. If the maximum allowed current is 8mA, how many turns are required in a wire 132cm long? (extra info Fig 2)
A 4-79 permalloy solenoid coil needs to produce a minimum inductance of 1.5 Wb/m2. If the maximum allowed current is 8mA, how many turns are required in a wire 132cm long? (extra info Fig 2)
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A 4-79 permalloy solenoid coil needs to produce a minimum inductance of 1.5 Wb/m2. If the maximum allowed current is 8mA, how many turns are required in a wire 132cm long? (extra info Fig 2)
Transcribed Image Text:Table 20-4 Properties of selected soft magnetic materials
Permeability u,
Initial Maximum He(A - m-1)
Coercivity Retentivity Bmax Resistivity
B, (T)
(T)
(un . m)
Name
Composition
Ingot iron
99.8% Fe
150
5000
80
0.77
2.14
0.10
Low-carbon steel 99.5% Fe
200
4000
100
2.14
1.12
Silicon iron,
Fe-3% Si
270
8000
60
2.01
0.47
unoriented
Silicon iron,
Fe-3% Si
1400
50,000
7
1.20
2.01
0.50
grain-oriented
4750 alloy
Fe-48% Ni
11,000
80,000
2
1.55
0.48
4-79 permalloy
Fe-4% Mo-79% Ni
40,000
200,000
0.80
0.58
Superalloy
Fe-5% Mo-80% Ni 80,000
450,000
0.4
0.78
0.65
2V-Permendur
Fe-2% V-49% Co
800
450,000
0.4
0.78
0.65
Supermendur
Fe-2% V-49% Co
100,000
16
2.00
2.30
0.40
Metglas 2650SC Feg B13.5Sig.6C2
300,000
3
1.46
1.61
1.35
Metglas 2650S-2 Be7gB13S9
600,000
1.35
1.56
1.37
MnZn ferrite
MnZn ferrite
H5C2
10,000
7.
0.09
0.40
1.5 x 105
H5E
18,000
3
0.12
0.44
5 x 104
Nizn ferrite
K5b
290
80
0.25
0.33
2 x 1012
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