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Using Sinusoidal Wave Forms
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where:
N = number of turns in winding
Bm = maximum flux density, gauss
E = RMS sinewave voltage of winding
H = magnetizing force, oersted
L = inductance, Henry.
µ
= permeability (CGS system), gauss/oersted
f = sinewave frequency, Hertz
Ac = core cross section area
(center leg width X.stackheight) inch2
Ks = lamination stacking factor
(Ks x Ac = effective core area)
I = current, ampere
ℓ= mean length of flux path, inch
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CONVERSION
TABLES |
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Decimal
(in.) |
Fraction
(in.) |
Metric (mm) |
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.016 |
1/64 |
.397 |
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.031 |
1/32 |
.794 |
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.047 |
3/64 |
1.191 |
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.063 |
1/16 |
1.588 |
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.078 |
5/64 |
1.984 |
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.094 |
3/32 |
2.381 |
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.109 |
7/64 |
2.778 |
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.125 |
1/8 |
3.175 |
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.141 |
9/64 |
3.572 |
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.156 |
5/32 |
3.969 |
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.172 |
11/64 |
4.366 |
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.188 |
3/16 |
4.763 |
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.203 |
13/64 |
5.159 |
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.234 |
7/32 |
5.556 |
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.250 |
15/64 |
5.953 |
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.266 |
1/4 |
6.350 |
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.281 |
17/64 |
6.747 |
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.297 |
9/32 |
7.144 |
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.313 |
19/64 |
7.541 |
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.328 |
5/16 |
7.938 |
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.344 |
21/64 |
8.334 |
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.359 |
11/32 |
8.731 |
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.375 |
23/64 |
9.128 |
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.391 |
3/8 |
9.525 |
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.406 |
25/64 |
9.922 |
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.422 |
13/32 |
10.319 |
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.438 |
27/64 |
10.716 |
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.453 |
7/16 |
11.113 |
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.469 |
29/64 |
11.509 |
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.484 |
15/32 |
11.906 |
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.500 |
31/64 |
12.303 |
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.516 |
1/2 |
12.700 |
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.531 |
33/64 |
13.097 |
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.547 |
17/32 |
13.494 |
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.563 |
35/64 |
13.891 |
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.578 |
9/16 |
14.288 |
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.594 |
37/64 |
14.684 |
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.609 |
19/32 |
15.081 |
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.625 |
39/64 |
15.478 |
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.641 |
5/8 |
15.875 |
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.656 |
41/64 |
16.272 |
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.672 |
21/32 |
16.669 |
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.688 |
43/64 |
17.066 |
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.703 |
11/16 |
17.463 |
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.719 |
45/64 |
17.859 |
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.734 |
23/32 |
18.256 |
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.750 |
47/64 |
18.653 |
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.766 |
3/4 |
19.050 |
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.781 |
49/64 |
19.446 |
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.797 |
25/32 |
19.844 |
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.813 |
51/64 |
20.241 |
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.828 |
13/16 |
20.638 |
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.844 |
53/64 |
21.034 |
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.859 |
27/32 |
21.431 |
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.859 |
55/64 |
21.828 |
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.875 |
7/8 |
22.225 |
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.891 |
57/64 |
22.622 |
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.906 |
29/32 |
23.019 |
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.922 |
59/64 |
23.416 |
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.938 |
15/16 |
23.813 |
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.953 |
61/64 |
24.209 |
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.969 |
31/32 |
24.606 |
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.984 |
63/64 |
25.003 |
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1.000 |
64/64 |
25.400 |
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CONVERSION
fACTORS |
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To Convert
From: |
Multiply By: |
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Gausses to lines per square inch |
6.4526 |
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Lines per square Inch to gausses |
0.1550 |
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Gausses to Teslas |
10-4 |
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Gausses to Maxwells per square
centimeter |
1.0 |
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Oersteds to amp-turns per inch |
2.0213 |
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Oersteds to amp-turns per
centimeter |
0.7958 |
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Amp-turns per centimeter to
oersteds |
1.2566 |
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Amp-turns per inch to oersteds |
0.4947 |
Watts{pound@60Hzto watts-pound@
50Hz
(15 kilogauss-approximate |
0.79 (non-oriented)
0.75(grain oriented) |
Watts/pound @ 60Hz to watts/kilogram
@ 50Hz
(15 kilogauss-approximate) |
1.74 (non-oriented)
1.65(grain oriented) |
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