Wind generator problem

[darwenn]

Hello, I bought this 500w 12V wind generator.
https://www.comptoireolien.fr/generateu ... page1.html

On a test bench I run it at 450 rpm (measurement with an electronic lap counter) and the diode bridge output voltage is only 9.6V DC when empty. Between each phase, always at 450 rpm, I measure 7.6V always empty.

The DC no load voltage of 9.6 V is therefore insufficient to charge a 12V battery. But that doesn't seem normal to me. At 450 rpm the generator should have largely started to charge and when empty, its voltage should exceed 15 to 17 Volts.

I suppose that the voltages of the 3 phases should add up in continuous output, right? However, I have wired my 3 diode bridges well this way:



Where do you think the problem is coming from?

Goods.

[thibr]

this is not added ...

7.6V? peak, Rms ...
is there a useless diode bridge?

[darwenn]

Thanks, I'm not a physics and math pro, however. The phases are therefore not added, but, that does not solve my concerns. Why do I only have 9.6V continuous at 450 rpm?

Edit: I just saw your second image, I will try with 2 diode bridges.

[darwenn]

Well, well with 2 diode bridges it's still the same problem with only 9.6v idle at 450rpm. An idea ?

[thibr]

it is normal that this does not change the result the diodes were in //
the measurement of the AC voltage is 7.6V? peak, Rms ...
measured with what?
maybe there are HS diodes on diode bridges?
what is the charge?
it's directly the battery! ?

[darwenn]

it is normal that this does not change the result the diodes were in //
the measurement of the AC voltage is 7.6V? peak, Rms ...
measured with what?
maybe there are HS diodes on diode bridges?
what is the charge?
it's directly the battery! ?

I tested with other diode bridges, same concerns (50A)

The 7.6V between the phases are measured with the multimeter in Alternative mode
The 9.6V are measured in the same way in continuous mode at the output of diode bridges.

As a charge, I do not put any for my measurements. Logically the DC voltage when empty (therefore without load) should necessarily be higher than 9.6V, otherwise it will never be possible to charge a 12V battery.

Anyway I tried to put a battery, just to see, and not surprisingly the ammeter remains at 0: no charge due to insufficient voltage delivered by the generator at 450 rpm

What I would like to know is already if it is normal to measure 7.6V between the phases at 450 rpm. Because if not, it would mean that the generator has a problem and no need to go further.

[darwenn]

I just got an answer from the store where I bought it

- Unfortunately your rotation is not enough to raise a 500w generator to need to rotate between 1200tr and 3000tr / m

Well, well ... I'll have to use a high torque X6 speed multiplier system (to counter the resistance of the generator when it starts to charge and continue to drive it)

[thibr]

add a capacitor at the output of the diode bridge and it may be better

[izentrop]

Hello,
It is not normal that a seller does not give the characteristics of a wind generator, or the brand.
After research it would be a Ista Brezze I500G / 12 V
She would start producing from 1200 rpm https://www.istabreeze.com/online/wind- ... grafik.pdf

And at 500 w it doesn't have to last long otherwise it smokes

For correct operation, instead of simple rectifiers, a charge regulator like this should be used. https://www.ebay.fr/itm/12V-24V-600W-Tu ... 3131112420

[darwenn]

It is indeed this generator model. 1200 turns is huge before producing. But I will manage with that. It is not to make a wind turbine, just a charging system by drive, it is mainly experimental so that should be enough. I indeed ordered the regulator of this type this afternoon saying to myself that it would be better than the diode bridges. Thank you ;)

More than pondering multiplication with the couple that is going well. Thank you for your answers.