Ngày tải lên :
04/06/2014, 12:42
... 18 92.]
ST'EINMETZ
ON
THE
LA
W
OF
HYSTERESIS.
39
With
regard
to
hysteresis,
this
kind
of
cast-steel
is
50
per
cent.
worse
than
the
annealed
cast-steel
No.
1,
but
still
twice
as
good
as
the
hardened
sample.
But,
magnetically,
it
is
poor-that
is,
of
low
conductivity,
giving
for
40
ampere
turns
M.
M.
F.
per
centimetre
leingth
only
-
6600
lines
of
magnetic
force
per
square
centimnetre.
while
the
annealed
steel
gives
,
14 ,000-that
is,
more
than
twice
as
many,
and
even
the
hardened
steel
gives
more,
8000.
SOFT
MACHINE
STEEL.
FIG.
12 .
TABLE
IX.
I.
IL
III.
F
Br
Bd
Br
Bd
F
Br
Bd
0
8.3
9.6
50
I5.9
i6.8
5
5.7
-+-I0.2
-
7-5
+11 .2
55
I6.4
I7.0
10
+
I.2
II
6
-
2
0
12 .4
6o
i6.9
17 .4
I5
7-4
12 .6
+
7.2
13 .5
65
I7.3
I7.7
20
1I.0
I1.4
10 .9
14 .2
70
17 .7
I8.0
25
12 .6
I3.8
12 .4
14 .8
7
5
I8.0
I8.2
30
13 .5
14 .2
13 .3 15 .3
8o
I8.3
I8.4
35
14 .2
14 -5
I4.0
15 .7
85
i8.6
I8.7
40
14 .8
I4.7
i6.o
90
I8.8
45
(39-0.)
I5-3
I6.4
(90.0.)
obs
44,400
64,ooo
.00944
!00928
Average,
;q-
.00936
hence
H
44,000
64,600
calc.
A
-400
+
600
1. 0
per
cent.
ặTHERFORCE ... 18 92.]
STEIN-METZ
ON
THE
LA
W
OF
HYSTERESIS.
F.
B.
1. 5
29700
2
4,350
3
7 ,10 0
4
8,850
5
10 ,000
6
10 ,800
TABLE
IV.
(1. )
F.
B.
7
1
J
,700
8
12 ,200
9
r2.700
10
13 ,10 00
12
23,900
14
24t500
i6
15 ,000
23
F.
B.
IS
15 ,450
20
I5,800
25
i6,400
30
xI6,8oo
35
17 ,200
40
17 ,500
HYSTERESIS.
B
magnetization,
in
Iiiues
of
magnetic
force
per
squiare
centimetre.
Hf
loss
of
energy
by
hysteresis,
in
ergs
per
cycle
and
cm'.
(
10 -7
joules)
-
t
+
H3
EIA
_
;y
B'6
loss
of
energy
by
hysteresis
proper,
in
ergs
per
cycle
and
cmin.
(-
10 -
joules).
ll,
e
N
12
-loss
of
energy
by
eddy-currents,.
in
ergs
per
cycle
and
cm'.
(-
10 -7
joules).
TABLE
IV.
(2.)
Frequency,
1N
78.
H ,11
11 2
J
1( I)i
calc.
2,o60
I,o8o
3 ,14 0
3,540
2 ,12 0
5,66o
7,740
5,600
13
,340
22,960
I10, 710
23,670
24,880
1
I2,720
27,600
17 ,280
T5,900
33,T80
.003 31
H,
2,650
4,490
1, 530
8,640
1, 300
I9,860
Ê
.1l
X
10 -6
obs.
3,060
+
8o
+
2.6
5,640
+
20
+
*3
I3,440
-
I00
-
.8
24,540
-
870
-
3-7
26,460
+I"40
+
4.0
33 .18 0
... 18 92.]
STEIN-METZ
ON
THE
LA
W
OF
HYSTERESIS.
F.
B.
1. 5
29700
2
4,350
3
7 ,10 0
4
8,850
5
10 ,000
6
10 ,800
TABLE
IV.
(1. )
F.
B.
7
1
J
,700
8
12 ,200
9
r2.700
10
13 ,10 00
12
23,900
14
24t500
i6
15 ,000
23
F.
B.
IS
15 ,450
20
I5,800
25
i6,400
30
xI6,8oo
35
17 ,200
40
17 ,500
HYSTERESIS.
B
magnetization,
in
Iiiues
of
magnetic
force
per
squiare
centimetre.
Hf
loss
of
energy
by
hysteresis,
in
ergs
per
cycle
and
cm'.
(
10 -7
joules)
-
t
+
H3
EIA
_
;y
B'6
loss
of
energy
by
hysteresis
proper,
in
ergs
per
cycle
and
cmin.
(-
10 -
joules).
ll,
e
N
12
-loss
of
energy
by
eddy-currents,.
in
ergs
per
cycle
and
cm'.
(-
10 -7
joules).
TABLE
IV.
(2.)
Frequency,
1N
78.
H ,11
11 2
J
1( I)i
calc.
2,o60
I,o8o
3 ,14 0
3,540
2 ,12 0
5,66o
7,740
5,600
13
,340
22,960
I10, 710
23,670
24,880
1
I2,720
27,600
17 ,280
T5,900
33,T80
.003 31
H,
2,650
4,490
1, 530
8,640
1, 300
I9,860
Ê
.1l
X
10 -6
obs.
3,060
+
8o
+
2.6
5,640
+
20
+
*3
I3,440
-
I00
-
.8
24,540
-
870
-
3-7
26,460
+I"40
+
4.0
33 .18 0
...