this is great news. and @ericgibbs this was one of the things on my check list.

Now I go single or 3 phase? I have a post here with pros and cons. Also finding a suitable mppt wind charge controller seems difficult for single phase

 

All three windings generate the same voltage:
View attachment 269109

as far as I understood. schematic #2 is used to minimize stall is it? stall as in the breaking force of when a load is applied. Or is that an urban myth?

 

Alternating them and giving enough space so each end would prefer to interact with the stator coil than a neighboring magnet will be key to your design.

Finally I managed to understand a little bit
of all told in this thread (what denotes my poor background on these matters).

 

Finally I managed to understand a little bit
of all told in this thread (what denotes my poor background on these matters).

can you please give me the post# I have missed that one.
i thin it is an important one as I am already fearing stall.

 

can you please give me the post# I have missed that one.
i thin it is an important one as I am already fearing stall.

@MrSalts' #70

 

as far as I understood. schematic #2 is used to minimize stall is it? stall as in the breaking force of when a load is applied. Or is that an urban myth?

Second winding is more convenient in fabrication and installation.
See example:
https://forum.allaboutcircuits.com/attachments/1653242797768-png.267826/

 

And stacking (forcing) magnets with the same orientation next to each other only makes a weird looking field. Alternating them and giving enough space so each end would prefer to interact with the stator coil than a neighboring magnet will be key to your design. The goal is to make AC current, that means alternating which pole of the magnet is over a stator coil.

Could you please elaborate a bit more? a repelling arrangement is also alternating btw. I am worried about the disk unable to move without a HUGE torque when under the slightest load on the coils

 

Second winding is more convenient in fabrication and installation.
See example:
https://forum.allaboutcircuits.com/attachments/1653242797768-png.267826/

do you have an open voltage output / rpm chart?
the reason why I have such an insane amount of poles is because I need the rpm to stay low while still outputting something scarry

 

do you have an open voltage output / rpm chart?

Ask @cmartinez about parameters.
But it will give you nothing, because of different dimensions of generators and different magnetic systems.

the reason why I have such an insane amount of poles is because I need the rpm to stay low while still outputting something scarry

You should be interested in parameters of yours generator.
So,
use one magnet on wheel;
use one coil;
connect load to coil;
rotate wheel with desired RPM;
measure peak voltage and average power on load;
multiply measured voltage with 96, multiply measured power with 96^2.
----------
Now you have all parameters of generator.
Mechanical power, needed for rotation of wheel equals calculated electrical power of generator.

 

I really do not like it when people, especially from the old school, just say things. without any support.

I al least am trying to support where I am coming from.

It's 2022 everybody!!

It is 2022 but the laws of physics that Lenz, Maxwell and all of the others discovered still apply today. You can do what ever your gut tells you but the laws still hold.

 

Ask @cmartinez about parameters.
But it will give you nothing, because of different dimensions of generators and different magnetic systems.

You should be interested in parameters of yours generator.
So,
use one magnet on wheel;
use one coil;
connect load to coil;
rotate wheel with desired RPM;
measure peak voltage and average power on load;
multiply measured voltage with 96, multiply measured power with 96^2.
----------
Now you have all parameters of generator.
Mechanical power, needed for rotation of wheel equals calculated electrical power of generator.

@cmartinez can you please tell us a bit more regarding open circuit voltage vs rpm in the generator referred to earlier?

I am fully aware I can't use those values for this generator but I would really be helped to learn non the less.

Reason being is that I have seen countless DIY generators and also some cheap china ones. They all fail to fall into what I am looking for.
Low RPM, High output.

 

@cmartinez can you please tell us a bit more regarding open circuit voltage vs rpm in the generator referred to earlier?

I am fully aware I can't use those values for this generator but I would really be helped to learn non the less.

Reason being is that I have seen countless DIY generators and also some cheap china ones. They all fail to fall into what I am looking for.
Low RPM, High output.

Define "high output". High voltage, high power - how much? 10Watts? 100Watts, 1000Watts? More?
10W may be possible but your 3D printed frame may collapse at 100W (I'm not even sure how your input power will be applied (hand crank, water wheel, pedal power, ...)?

 

Define "high output". High voltage, high power - how much? 10Watts? 100Watts, 1000Watts? More?
10W may be possible but your 3D printed frame may collapse at 100W (I'm not even sure how your input power will be applied (hand crank, water wheel, pedal power, ...)?

My earlier tests suggest an open circuit voltage of around 380 to 400 volts at 120 rpm. I will admit that these tests could be bogus but it's all I got at the moment.

The drive will be a massive (in a DIY context) VAWT at 2m diamter and 3m height. Stack-able at that to make 2x6 2x9m etc.

 

10W may be possible but your 3D printed frame may collapse at 100W

challenge accepted

ADDITION: I think with a drive like this then at least 1.4kw at 2x3m turbine at 4m/s wind speed. There is this calculator online but I must have misplaced the link. I'll follow up once I find it again and wil confirm the values.

 

found it.
https://www.omnicalculator.com/ecology/wind-turbine
But after putting in the values again then I get no closer to
115W at 4m/s ;(

ADDITION: the good thing though is that my area has quite high m/s all the time. like now we have like 7.8m/s and lets not forget that this beast will be stack-able eventually

 

@cmartinez can you please tell us a bit more regarding open circuit voltage vs rpm in the generator referred to earlier?

I am fully aware I can't use those values for this generator but I would really be helped to learn non the less.

Reason being is that I have seen countless DIY generators and also some cheap china ones. They all fail to fall into what I am looking for.
Low RPM, High output.

I built a tiny thing a couple of years ago to test an energy harvesting theory that I had. The generator worked, and although its output was good enough to sustain a circuit that I had designed, its cost did not justify its intended use.

Anyway, voltage under load dropped significantly (about 30% to 40%). And one has to pay attention at the wire gauge one uses and how its coils are connected depending on what one wants. High voltage or high amps or high effective power.

 

And one has to pay attention at the wire gauge one uses and how its coils are connected depending on what one wants. High voltage or high amps or high effective power.

Max respect for your contribution.
Can you please elaborate? In this context we need all the knowledge we can have.

 

When people are free to pursue goals unfettered by presumed limitations on what they can accomplish, they just may manage some extraordinary feats through the combined application of native talent and hard work. - David Mikkelson

this is my point all this time. Let's not forget my transformer that ended up working without anyone believe it ever would

 

The structural engineer, responsible for all the required calculations in order to get a building permit for the house I designed, applied for, and built, once told me.
You seem to not be limited by any knowledge and / or understanding. (because I have non)

I take that as a compliment

 

uggg.

I am soo confused at the moment.

My tesla meter, as I was still collecting data, started to give wildly fluctuating readings before it stopped reading all together.
So I am no longer confident that any of my readings with that cheap tool were of any trustworthiness at any moment in time ;(

I see no alternative but to run the 4 test magnets in different arrangements over an actual serpentine coil to measure open circuit voltage.

If anyone has a suggestion on how to best go about the coil for this test purposes then please tell.

I do not have expensive lab equipment so I think what we need is a full disk of coils. I am worried that only having 2 coils will give blibs that barely register on my multimeter.