WEBVTT

1
00:00:00.453 --> 00:00:02.393
The outer core dimensions can be right

2
00:00:02.408 --> 00:00:04.117
while the steel section is wrong.

3
00:00:05.004 --> 00:00:08.194
Net steel area equals geometric area multiplied

4
00:00:08.209 --> 00:00:09.479
by stacking factor.

5
00:00:10.363 --> 00:00:11.939
Use the article's example:

6
00:00:12.145 --> 00:00:13.912
a design at one point seven zero

7
00:00:13.927 --> 00:00:16.115
tesla assumes ninety-seven percent.

8
00:00:16.999 --> 00:00:19.652
Build the same geometry at ninety-four percent,

9
00:00:19.765 --> 00:00:20.942
with the same flux.

10
00:00:21.799 --> 00:00:23.673
The steel now operates at about one

11
00:00:23.688 --> 00:00:25.197
point seven five tesla.

12
00:00:26.081 --> 00:00:27.418
This is a calculation,

13
00:00:27.664 --> 00:00:29.240
not a measured loss result.

14
00:00:30.124 --> 00:00:31.301
Burrs, sheet shape,

15
00:00:31.414 --> 00:00:33.846
coating space, debris and loose clamping can

16
00:00:33.861 --> 00:00:35.117
all reduce the factor.

17
00:00:36.002 --> 00:00:38.048
Check the assembled packet height under the

18
00:00:38.063 --> 00:00:39.812
specified clamping condition.

19
00:00:40.696 --> 00:00:43.287
Compare mass with steel density and geometric

20
00:00:43.302 --> 00:00:45.051
volume, excluding ducts.

21
00:00:45.935 --> 00:00:47.777
Measure the steel section you built,

22
00:00:48.036 --> 00:00:50.104
rather than assuming the one you designed.