Black Series 300 600 and 600S from Prevent

[Ruthenian]

I will check, very hard because the blades rotate almost all the time !!!
I may have a problem with the scope. I will check on the 220VAC / 50Hz

[dedeleco]

A simple strobe, in the dark, with an LED powered by a pulse generator, which lights up the blades a little, allows you to measure the speed of rotation !!
Or with a strobe for car engine to adjust.
By filming we have a stroboscopic effect clearly visible on youtube, blades immobile if the rotation / 3 is a multiple of the frequency of shots !!

The vibrations of the mat, low frequency are with a component at the speed of rotation, or triple.
We can detect with a piezo pellet at € 0,5 against the mat and connected directly to an oscilloscope !! as :
http://www.conrad.fr/ce/fr/product/690635/
very good for detecting faults of all kinds, balancing, static and dynamic, vortices, weakened mat before rupture, etc.

By putting at the end of a mast a simple rod or flexible sheet that touches the blades a little, we will hear triple the speed !!

An armada of methods !!!

There is something to learn physics !!!

[dedeleco]

Instead of filming, we can look through a cardboard disc rotating on an axis, through thin slits cut on this disc and see how fast the wind turbine stops spinning by elementary strobe effect, and measure this speed of rotation of the disc with the oscilloscope, (LED diode as photoelectric detector of light cut by the disc for example, or end of the disc tapping on the piezo at each turn, small magnet passing in front of a small coil, etc.).

http://en.wikipedia.org/wiki/Phenakistoscope
http://en.wikipedia.org/wiki/Stroboscope

[Ruthenian]

Here is a measurement in AC on the oscilloscope:
Caught on the three sons



and in DC:



We are in Tramontane period (beginning).

The performances do not seem to me to be there.

[dedeleco]

4 traces 2 to 2 similar phase shifted by 60 ° or 1/6 of a turn.
The time per tile seems 5ms and the frequency almost unchanged, period 10 tiles or 50ms.
Traces measured between what and what?
The mass connected to each wire, of the three wires, gives 2 traces, making a total of 6 curves.
Which pair of curves is double?
3 wires and therefore 3 measurements in principle at 60 ° from each other
Why different between the two photos, is it associated with the difference 2 coils 5 and one at 8 Ohms, in what way?

One has the impression, that the traces inclined at max voltage flattened flat by the current in the diodes, on the others are inclined as a result of voltage induced in the coils in addition as a result of the switching of the rectifying diodes on the coils unbalanced, one of which has a higher inductance and resistance, which gives a wobbly three-phase. (wiring error?)

The production does not look better with the same wind on this site:

http://blackwindturbine.com/courbe-prod ... ack600.php



280W max power, half of 600W max!

[Ruthenian]

This curve is a little odd because in peak wind I find these results a little example this morning gust at 58 km / h, average 40 km / h, the windmaster produced 385 W in instant.
By cons at low speed around 4-5 m / s, I do not have these results at all, much less.
Is it because of the windmaster settings? Not sure, but as you often say there is a very big inconsistency between the betz limit and the reality:
with this wind:


and:



the Black600 produced only 1.1kwh

For the three wires, they are those from the Black 600 release

[dedeleco]

average 40 km / h, the windmaster produced 385 W in instant.
By cons at low speed around 4-5 m / s, I do not have these results at all, much less.

The law with respect to the wind speed for any wind-driven machine (force as V ^ 2 multiplied by the speed of movement as V of the wind) is the cube of the speed and therefore between 11,1m / s = 40km / h and 5m / S is 2,2 ¨3 or 11 times less, so the fact remains that 380W / 11 = 35W possible at best.

the limit of Betz at 11m / s is 815W / m2 or 1630W for the Black 600 of 2 m2, and therefore it gives 380/1630 = 23% of Betz, between 1/5 and 1/4, in my opinion correct for blades with low finesse, not elongated.

The manual of the Black600 gives nothing on the reality of the Black600, only the imaginary perfect limit of Betz, energy in the wind !!
http://blackwindturbine.com/docs/Manuel ... reseau.pdf

It is almost a psychological scam.

To get much closer to the limit of Betz, you need a wind without any vortices and blades with very great finesse very elongated, as for very large wind turbines of 150m in diameter in the open sea.

[Ruthenian]

on page 16:
config windmaster they put:
U0 28 Automatic
U1 35 0,0
U2 40 0,1
U3 50 0,5
U4 70 Automatic

and a page further:
U0 35 Automatic
U1 50 0,3
U2 70 1,5
U3 82 3,0
U4 100 Automatic

pffffffffff !!!!!!!!!!!

[dedeleco]

It is inconsistent and they write anything.

You have to measure the exact characteristics.

One more problem; the three-phase seems wobbly, not 3 equal coils !!

[Ruthenian]

In fact the AC and DC deformation take place as soon as the windmaster produces. Before no ...