Come on, let's go for a post devoted to self-construction.
The tenors, go show your achievements and your calculations.
Objective 200 W at any wind. No more .
Self wind turbine construction with radial rotor
- plasmanu
- Econologue expert
- posts: 2847
- Registration: 21/11/04, 06:05
- Location: The 07170 Lavilledieu viaduct
- x 180
a little thing like that (mini)?
http://www.projectfreepower.com/wind-po ... rbine.html
Is there something to do with the small brushless motors (of recovery)
I just dropped there:
amazing what we don't see
http://www.energieplus-lesite.be/energi ... htm?reload
http://www.projectfreepower.com/wind-po ... rbine.html
Is there something to do with the small brushless motors (of recovery)
I just dropped there:
amazing what we don't see
http://www.energieplus-lesite.be/energi ... htm?reload
0 x
"Not to see Evil, not to hear Evil, not to speak Evil" 3 little monkeys Mizaru
Here is an example of "diy"
Not on 200W, but there is everything.
creativity, resourcefulness and humor
http://www.mdpub.com/Wind_Turbine/
Not on 200W, but there is everything.
creativity, resourcefulness and humor
http://www.mdpub.com/Wind_Turbine/
0 x
"Talking about it is one thing, doing it another.
I made my choice"
I made my choice"
Ruthenian wrote:When I bought my copper the winder had told me that it was important to air gap them to direct the current. However, it seems to me that Dede had told me that it was not necessary with N45 magnets.
Is this the case?
answer with basic sharp courses:
http://fr.wikipedia.org/wiki/Circuit_magn%C3%A9tique
http://en.wikipedia.org/wiki/Magnetic_circuit
http://en.wikipedia.org/wiki/Magnetic_reluctance
http://fr.wikipedia.org/wiki/R%C3%A9luctance
http://en.wikipedia.org/wiki/Saturation_%28magnetic%29
http://www.technique.mecaniqueindustrie ... rnatif.PDF
The induction reaches saturation too easily without any air gap, with very little excitation current, with very low excitation, which causes problems, non-linearity, and the like.
Air gaps can be created in the cores of certain transformers to reduce the effects of saturation. This increases the reluctance of the magnetic circuit, and enables it to store more energy before core saturation. This effect is also used in the flyback transformer.
When AC signals are applied, this nonlinearity can cause the generation of harmonics and intermodulation distortion. To prevent this, the level of signals applied to iron core inductors must be limited so they don't saturate. To lower its effects, an air gap is created in some kinds of transformer cores.
On the other hand, saturation is exploited in some electronic devices. Saturation is employed to limit current in saturable-core transformers, used in arc welding. When the primary current exceeds a certain value, the core is pushed into its saturation region, limiting further increases in secondary current. In a more sophisticated application, saturable core inductors and magnetic amplifiers use a DC current through a separate winding to control an inductor's impedance. Varying the current in the control winding moves the operating point up and down in the saturation curve, controlling the AC current through the inductor. These are used in variable fluorescent light ballasts, and power control systems. [
http://en.wikipedia.org/wiki/Flyback_transformer
this exists in any weaker engine or alternator, since the magnetic circuit varies over time:
http://en.wikipedia.org/wiki/Reluctance_motor
a souvenir machine:
http://en.wikipedia.org/wiki/Alexanderson_alternator
Powerful magnets saturate mild steel to see their induction values.
So there is an optimum.
But I would tend to use them without a soft iron frame, for easier starting, and a little less power.
We must see the exact realization of the current alternator and how is its magnetic circuit, closed how.
0 x
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