Building the sickest ® VAWT ever. Brilliant minds unite please!!

[brandnewb]

but before I do any of that I am going to see if feeding the VFD with 3 phase power and a more finer understanding of the settings will allow for a loaded 100Hz feed.

Basically the battery bank connected without protection. Going in dry one might call it.

I have asked before and will do so once more.

What if I deplete all cells / bottom balance the array?

And then start going in dry?

 

[brandnewb]

pretty cool looking but I'm not that crazy about the stuff I find it best used were not seen.
However my father built a bathhouse out of a prefabricated shed building it contained a water heater toilet sink tub shower washer dryer and dresser insulating and covering the inside structure with the osb then polyurethaned and trimming it with wood he used this in conjunction with a camping trailer when he originally developed his SC farm property.

View attachment 241892This picture taken today structure was built over 20 years ago.

View attachment 241885View attachment 241889View attachment 241888View attachment 241891View attachment 241887View attachment 241883View attachment 241884

yes brother.

It is good to find someone that can appreciate OSB to it's fullest extend.

Hedges, I am not making a snag remark towards you and your troubled history with OSB. I am merely stating that perhaps you should come on board

 

[Bananaman321]

yes brother.

It is good to find someone that can appreciate OSB to it's fullest extend.

Hedges, I am not making a snag remark towards you and your troubled history with OSB. I am merely stating that perhaps you should come on board

I believe there is still hope for @Hedges we just have to get that bad taste out of his mouth.

 

[brandnewb]

Ok Gary, we are going for 1:121 then.

I mean why not?

I am still counting on you to tell me more about how to hook up this 3 x 5KW (3phase heater) yes?

 

[brandnewb]

so regarding this 1:121

Am I doing it correctly?

1:11 * 1:11?

= 1:121?

 

[brandnewb]

it is what is known as
'pushing the envelope'

 

[brandnewb]

 

[brandnewb]

I think I was just confirmed by our (un)trusty AI pal

I have been lead on a wild goose chase for soo long thinking that what ever voltage I produce with a PMA is a good basis to work from.

Well. I for now firmly believe that is no longer the case. I base this all from my own /scientific/ research

The PMA in this scenario in 3 phase.

The only open circuit voltage we should be interested in is the RMS one. NOT the PP one I have been doing for YEARS!!!!!!!!!!!!!!!!!!!

I am so steaming right now That someone told me once before and I just did not see or forgot. Or worse. Even the folks at the hugest in esteem forum for this subject matter (not this one, this one is the best for all topics solar for real) either also did not know or thought 'you know what? lets just let this guy struggle with ignorance while we watch with glee'

This RANT has no influence on the current process though as I was, since a few months ago, operating from my (by now confirmed) assumption.

 

[brandnewb]

argg. I managed to get all of the 3 main phases to trip in my breaker cabinet.

and a whole lot of sparks from either the VFD or the motor!! for real!!

How? Trying to connect a 5 wire source to a 3 wire input VFD. Or maybe 4 ? there is this weird icon I still do not know what it is.

Ill share the situation.



I am looking for advice so that I can test far more PMA configurations then when I have to go out and set the whole damned Turbine/PMA up.

ahh but as usual I might have blown up a whole lot of time and money.

I hate this trail and error. grrrrrrrr

needles to say yes is that I might have blown up quite a few of currency worth here just now.

Who dares to take a jab and try this again (with possible faulty component assessment procedures)?

 

[brandnewb]

ok gang

I will go back to 1:11 first. 1:121 is ridiculous

Why, one might wonder though.

Ok i'll tell one;

You see after the disaster with the VFD, lets call it the 3 phase drive incident, I kept dreaming that I should work from small to large in steps.

Not starting small and then going to the other end of the spectrum.

But why still, I hear one wondering.

hmm well.
Ok, things are just more easy to predict and handle if one starts from a known working basis, however sad the output.
Slowly ramping up is tedious yes. Not exciting at all yes.

ehh let me rephrase that.
fn boring as excrement.

but for now I think it is better to avoid blowing up valuable equipment or even maybe more than that.

mind you that last time the 1:11 failed due to poor engineering.
this time around I will try and make sure my engineering is a bit less worthless.

 

[brandnewb]

this time around i think what ever we throw at the 1:11 (the below being the PMA pully)

it will hold. I think I know, I guess, I hope... I have no clue what so ever



luckily I fell in love again with my printer as she is now behaving better than ever after the countless of advise I have gotten, mostly here.

yes yes one could argue about the surface pealing up. But then again, We only care about functionality at this stage.

Estecics come later.





probably never

 

[brandnewb]

@justgary

aii?



lets see if this one will not break apart yes?

 

[brandnewb]

ok gang. I am back on track after a few very serious issues that needed dealing with.

The VFD is back in action, although only single phase , and ready to determine what gear ratio is best to start with.



The image above does not yet have any stages of gearing. It is still the original 1:11 single stage.

After my very unscientific calculations I think I'd like to try a 1:88 in 2 stages (1:11 * 1:8) of gear ratio.
So that would mean a Hz of 285.33 at 88 times the speed of the turbine rotation.

It will allow for coils that are smaller in every which way but mm2. the mm2 of the wires can be much larger that way. Although I am not going to do that at first. Better to first go for density. This means smaller wires in parallel as opposed to a single huge wire.

Also soon(TM) in line are huge set of aluminum plates to house the coils so this endless fine tuning with the wooden holders becomes a thing of the past. It should be as simple as insert coils into alu holders and then let things rip.

Just know that I am still on this case but also please understand sometimes there are things more important

 

[brandnewb]

this is what is printing now




The cavity to be filled with resin.

If we'd to print this full then it would take one day and 9 hours plus of print time.

yeah.. NO..

Better to go for post processing in these types of scenarios.

 

[brandnewb]

 

[brandnewb]

nah this one is better



somewhere hidden should be the word 'sickest' but I can't find it still.

this is just me having a bit of a blast with my (un)trusty friend

 

[brandnewb]

ahh yes.

nothing like a failed print that also destroyed the z probe



ok gang. it will need more time yet again

 

[brandnewb]

@anyone, @Hedges @justgary

Please look over my shoulders with me to see if my conclusion that having many smaller wires as opposed to fewer more thick wires makes any sense.

After many tests, with all kinds of coils, that were conducted in the utmost of precise manner of how to NOT do scientific experiments.
It came to more smaller is better than less larger.

I have here a model image that underlines this believe.



If we need this to go the scientific route then that would add 5 years to this mission and countless of souls will be lost

774.584817 mm² of dead space for the larger wire configuration.

193.646204 mm² of dead space for the smaller wire configuration.

Yet now we have to make up for the area discrepancy.

the ticker wire has 2825.415183 mm² of area

the smaller one has 706.353796 mm² of area

How do we theoretically make a case for the compact version?

 

[brandnewb]

well one thing is to be sure that we should double the wire count in the small version. else it not be of benefit to the amperage ability.

anyway gang. I am at the edge of what I can do in terms of using this platform to state my case. I think there are amongst us people that know far better.

 

[justgary]

If we need this to go the scientific route then that would add 5 years to this mission and countless of souls will be lost

LOL, it has always been on the scientific route.

Wire diameter is chosen by its maximum current carrying capability. Number of turns is chosen by its ability to make current in a specific magnetic field.

Power available is determined by expected wind and the rotor design. This number should guide the choice of the others.

 

[brandnewb]

LOL, it has always been on the scientific route.

Wire diameter is chosen by its maximum current carrying capability. Number of turns is chosen by its ability to make current in a specific magnetic field.

Power available is determined by expected wind and the rotor design. This number should guide the choice of the others.

i'll make it so my captain.

I dare to say this now as I finally have got the VFD working again.

So I am going to do things a little different this time around.

step one is to asses which frequency I need to get to a single coil running at around 57Vac(rms)

2) work in progress. Hook up all coil pairs in parallel and in a delta config. All I care now is about amps
3) measure the VDC after rectification.
4) if around 56VDC then rock on. If not start over.
5) measure the amperage with which the battery bank is charging.
6) if pathetic then start over but this time double the frequency and half the length of wires in the coil. If a win then I will wear my badge of pride and bragging rights sooner than I thought. (one must know. It is a secret though . I am not sure I can make it in time )
7) if hopeful, create pullies that will get the PMA to the target frequency. Mind you that even though we now have a turbine a bit more than 8m in diam. I can and probably will try go just for this nice round 10m diam.

I mean why not? :0

I still think having an equal amount, in terms of area of running parallel smaller wires is better than having a single larger wire with equal area.
You lot is forgetting the sheer difficulty it is to work with any wire larger than lets say 0.8mm diam

I dare one. I double dare one to tell me they have mastered the skill of to DIY a 2mm diam wires into coils
I tried........

 

[brandnewb]

ahh no.. I have not tried all options yet. I recently figured that a meander pattern in coils does not have to be completed.

So any size of wire is back on the menu gang!!

Feast at it!!

I mean the snake thingy. I have long thought it needs to be all around thus making it not practical for this scenario. But now I want to try just leaving the ends far apart.

 

[brandnewb]

ohh wow. serpentine is what I meant.

You see. I might not make it in time gang. Enjoy life to the fullest!!

 

[brandnewb]

ohh wow. did you guys notice the funk in the waveform is no longer there while the motor is driving the PMA?

I just realized.. It tells me that I finally have gotten the parameters of the VFD right (or at a minimum less bad) so that it does not produce these tremors in the wave.

I sure do hope that when I hook up the battery bank things will this time not grind to a halt again

 

[brandnewb]

one final log book entry the comming 10 minutes then.

I forgot to show off


scope creep anyone?

nah please do not worry. the turbine will not go floating before it has been battle tested as is. No more scope creep.

cough cough.

no more scope creep that anyone notices then ok?

I will tell my kid to use this flotsam for the plants (it's true intend) in my legacy.

A turbine of our scope will need more barrels and far more apart than this







Good thing I have more barrels.