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Transformers for lower cut in speed?
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10
comments (10 topical, editorial)
Re: Transformers for lower cut in speed?
(
none / 0
) (
#1
)
by kmitchel on Sat Oct 25th, 2003 at 02:11:19 PM MST
(
User Info
)
Try
http://members.tripod.com/~schematics/xform/xformer1.htm
Detailed info on winding your own power transformers.
Re: Transformers for lower cut in speed?
(
none / 0
) (
#3
)
by bob golding (
photoman290 at yahoo dot com
) on Sat Oct 25th, 2003 at 04:06:52 PM MST
(
User Info
)
hi hannu,
all transformers need a certain voltage before they will work. this is called the magnetising current. basicly if you think of the electrical circuit and the magnetic circuit seperatly you will understand. below the magnetising current the primary of the transformer is just a coil of wire not connected to the secondary magneticly because below the magnatising current there is no magnetic circuit to transfer the energy to the secondary. once there is enough current to magnatise the core the magnetic circuit is completed and the current in the primary is transfered to the secondary.transformers are pretty effiecient but as hugh points out in wind power workshop everyone takes there cut. in the case of transformers it is magnetising current and wire resistance plus eddy current losses. usually about 2 to 5 % depending on the waveform and fequency. iron cores are good up to about 400 hz or so. this is a over simplifacation but hope you get the idea. bit rusty so if i have got this all wrong please feel free to correct me.
bob
[
Parent
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Transformers for lower cut in speed?
|
10
comments (10 topical, 0 editorial)
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