1
00:00:00,000 --> 00:00:00,870
The tip of these

2
00:00:00,870 --> 00:00:01,750
blades moves at more

3
00:00:01,750 --> 00:00:02,850
than 300 kilometers

4
00:00:02,850 --> 00:00:03,690
per hour,

5
00:00:03,690 --> 00:00:04,570
but the rotor turns

6
00:00:04,570 --> 00:00:05,570
only 15 times a

7
00:00:05,570 --> 00:00:06,210
minute.

8
00:00:06,210 --> 00:00:06,990
So how do you

9
00:00:06,990 --> 00:00:07,850
get electricity from

10
00:00:07,850 --> 00:00:09,170
something so slow?

11
00:00:09,170 --> 00:00:10,510
The wind pushes three

12
00:00:10,510 --> 00:00:11,610
blades more than 50

13
00:00:11,610 --> 00:00:12,430
meters long,

14
00:00:12,430 --> 00:00:13,310
and each one turns

15
00:00:13,310 --> 00:00:14,230
on its own axis

16
00:00:14,230 --> 00:00:15,330
to catch only the

17
00:00:15,330 --> 00:00:16,470
wind it needs.

18
00:00:16,470 --> 00:00:17,770
Inside the nacelle,

19
00:00:17,770 --> 00:00:18,790
the slow shaft enters

20
00:00:18,790 --> 00:00:20,450
a step-up gearbox.

21
00:00:20,450 --> 00:00:21,350
Here the gearbox does

22
00:00:21,350 --> 00:00:22,150
the opposite of a

23
00:00:22,150 --> 00:00:22,950
gas turbine.

24
00:00:22,950 --> 00:00:23,790
It multiplies the

25
00:00:23,790 --> 00:00:24,770
speed more than 100

26
00:00:24,770 --> 00:00:25,410
times,

27
00:00:25,410 --> 00:00:26,490
from 15 to about

28
00:00:26,490 --> 00:00:28,530
1,700 revolutions.

29
00:00:28,530 --> 00:00:29,310
That drives a

30
00:00:29,310 --> 00:00:30,790
doubly-fed generator.

31
00:00:30,790 --> 00:00:31,390
Its stator goes

32
00:00:31,390 --> 00:00:32,470
straight to the grid,

33
00:00:32,470 --> 00:00:33,250
and its rotor,

34
00:00:33,250 --> 00:00:34,170
through slip rings,

35
00:00:34,170 --> 00:00:34,650
connects to a

36
00:00:34,650 --> 00:00:35,590
converter that handles

37
00:00:35,590 --> 00:00:36,390
about a third of

38
00:00:36,390 --> 00:00:37,230
the power.

39
00:00:37,230 --> 00:00:37,930
That is how it

40
00:00:37,930 --> 00:00:39,210
delivers 60 hertz,

41
00:00:39,210 --> 00:00:39,810
even as the wind

42
00:00:39,810 --> 00:00:41,050
changes.

43
00:00:41,050 --> 00:00:42,030
Other designs drop the

44
00:00:42,030 --> 00:00:42,870
gearbox.

45
00:00:42,870 --> 00:00:43,710
A huge permanent

46
00:00:43,710 --> 00:00:44,730
magnet generator,

47
00:00:44,730 --> 00:00:45,670
with many poles,

48
00:00:45,670 --> 00:00:46,590
turns as slowly as

49
00:00:46,590 --> 00:00:47,250
the blades,

50
00:00:47,250 --> 00:00:48,190
and a full converter

51
00:00:48,190 --> 00:00:49,750
adjusts the frequency.

52
00:00:49,750 --> 00:00:50,610
The generator puts out

53
00:00:50,610 --> 00:00:51,950
690 volts,

54
00:00:51,950 --> 00:00:52,650
and a transformer

55
00:00:52,650 --> 00:00:54,270
steps up the voltage.

56
00:00:54,270 --> 00:00:55,510
Every gust punishes

57
00:00:55,510 --> 00:00:56,290
windings,

58
00:00:56,290 --> 00:00:56,650
rings,

59
00:00:56,650 --> 00:00:57,490
and bearings.

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00:00:57,490 --> 00:00:58,950
At TEMISA Power Gen,

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00:00:58,950 --> 00:00:59,570
we have serviced more

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00:00:59,570 --> 00:01:00,730
than 30 wind turbine

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00:01:00,730 --> 00:01:01,850
generators.

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00:01:01,850 --> 00:01:02,510
Get a quote at

65
00:01:02,510 --> 00:01:04,720
temisapowergen.mx