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Lösning<br />
a) H N ⋅<br />
=<br />
I 1250⋅3,<br />
04<br />
= = 19000 [ At / m ]<br />
l 0,<br />
2<br />
Ur diagrammet B = 1,6 [T, Wb/m 2 ]<br />
b) Remanenta flödestätheten avläses till<br />
B = 1,2 [T, Wb/m 2 ]<br />
c) Avmagnetisering kräver H = -5000 [At/m]<br />
H ⋅l<br />
5000⋅0,<br />
2<br />
I = = − = −0,8 [ A ]<br />
N 1250<br />
B [T] 1,6<br />
1,2<br />
-5000<br />
H [At/m]<br />
19000<br />
277s<br />
13
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