₦airaland Forum

OandO is nice, they can take you to their flow station.

Who is murry? How can you guys be calling murry when, novak and roger are still in it? Abeg, no sentiments jor!
Murry is a terrible tennis player, he wins as a result of fluke and because he is the major british player he's giving that bit of publicity he does not deserve.
I can't remember the last time I watched murry play and he wins in straight sets, it always goes to the 5th set, and he loses the 1st most of the time.
Murry is an over-rated player, its that simple.

tutuwater: Any where in the north is fucking deadly.
My friend lost his life this Monday in Kaduna.
He was posted to serve NYSC in kaduna was sick and could not go out due to curfew. he lost his life. don't go to the north for anything not even to serve your country.

That's sad.
But just because there's a curfew doesn't measn you can't go get medical attention, my next door wife was sick and we took her to the hospital even with the curfew, but there was a police man with them.
As long as its an emergency, I believe the authorities would understand.

austengold: Hey, @ll prospective corp members, nothing is +ve about borno and yobe. ɪ̣̝̇ served in maiduguri 2010/11C and ɪ̣̝̇ must tell U̶̲̥̅̊, those peepz ova dere ‎​A̶̲̥̅re hungry blood sucking vampire transformed and militant oriented individuals. ɪ̣̝̇ will say this: D¤N'T GO †ЂΞЯ̩̥̊Ξ. If Ɣ☺ΰ​​ D̶̲̥̅̊o S✽̶ U̶̲̥̅̊ ® on Ɣ☺Your own. ɑ̤̥̈̊ word is enough Fø̲̣̣я̅ D̶̲̥̅̊ wise. †ђξя̩̥̊ξ ‎​A̶̲̥̅re two options redeploy or sit at home. Abuja, kaduna, plateau, kano, bauchi upwards ‎​A̶̲̥̅re really Antihuman being locations. Ɣ☺ΰ​​ have been warned Oº°˚˚°ºoo. Contributing these cos God kept ♍ε̲̣̣̣̥ alive during †̥hα̲̅†̥ time. Have mercy on ur parents. Peace!

Why are yo exaggerating?

Here's the plan, I'll go back tomorrow with a meter, then connect it to the terminals, rotated the motor and see the amount of voltage I can get, the one with highest wins!!
I know it sounds alil bit quacky, but I have to improvice a bit, naija factor.

This is AC
115VAC 50Hz
575rpm
Its a geared motor

This is a booster bump
It is DC
All I know it is 24 VDc

This is a DC motor but don't have the specifications.

Magnet pump
But the pump side would be removed
24VDC
1.46A
I don't know the rpm

This is an induction motor
Gear ratio- 1/4.6
115v 50/60Hz 20uf
40w 200/250rpm 1.4A

homerac7: Wow...wow...wow...

Bro, I guess u hav ur cart before the horse. U normally do all those calculations before u go on to select ur materials and determine d blade dimensions. If you can't even be sure of the wind speed and quality on site u want to use it, it appears you have been guess working wc is not good when working with wind because Its d most treacherous among all the renewable energy sources. It's highly site specific, so a turbine performance in Bauchi may not b same in Abeokuta or Dutse. In fact, d first data set u need before proceeding on design are your average windspeed, humidity and temperature and surface roughness class. The first 3 u can get ESTIMATE values for your locality from NIMET or ur climatology section of Geography department if such exists. Based on d data u get ur wind quantity and quality which is what helps u to derive ur availability and cut-in speed and cut-out speed ( these after u have done ur material selection against d energy available in d wind over ur availability period). By now you can calculate ur blade tip ratio and select ur angle of attack. At ds stage, d surface area of d blade can be calculated easily and from there u can select ur length of blade. At ds point u would also have known d wind force expected against ur blades and height u can harvest best wind quality and quantity.

U were mentioning "6", I guess that's ur tip speed ration. With that I expect a not-so-broad blade but slightly long designed to run fast under low wind. That u have chose 3 blades shows u want slightly more torque at speed expense. Good selection, I say.

Back to my earlier analysis, its at point of design of d prime mover (turbine) dt u were supposed to have selected and matched it with load torque requirements. Again, the calculations would help u to determine the RPM of the designed turbine. All these parameters u can alter to suite the characteristics of d generator or final load. It's at end of these that u go on and start construction based on ur earlier design.

Now, I can only hope along with you that ur gamble works. Wind is unlike any other energy source because of its treacherously unpredictability.

Your major concern for now I guess is on generator selection. Well AC motors r more compact than their DC equivalents, what dt means to u is that it will require lesser torque. U r faced wt compromise of dt with having extra circuitry for amplification and rectification on downstream side versus higher torque whc will demand higher machine (turbine) size.

I'll upload the calculations later

Sorry guys, my subscribtion finished with no warning. With the whole curfew thingy, one can't just go out any how.
So I went shopping for motor today, found some interesting choices.
Would upload the pics later when I get home.

homerac7: Hello Sadiq,

I just saw ur post after a friend (who posted earlier on pg 1) told me abt it. Well done, keep it up.

I did works on wind turbine in my undergraduate project and I have followed the technology passionately for over 6 years. I'm quick to notice that u haven't provided some basics before you selves Into construction.

1. What's d average windspeed of d area/site u plan mounting it?

2. What's d surface roughness class?

3. What's d cut-in speed and cut-out speed of d turbine?

4. Have you done your material strength analysis for d blades?

5. What's d blade tip speed ratio?

These r some of d basic info I think you will need even before you go ahead to construct. But ASSUMING u hav done these, then I understand the mix up between electric motor and generator. Usually, AC generators are more used. DC motors have limited use. That does not mean that it won't work though. An experienced electrician can explain better.

I can see that its a roof type u plan to construct, although I don't know what height u have selected to mount it and type of buildings and vegetation around u. I will also ask dt u consider needle bearings for d yaw assembly against roller balls bearing because of losses since d load is not much.

I may not b able to say much more than ds for now based on d scanty info I hav from ur posts so far.

For d power amplification, go to oshodi under bridge where Igbo guys sell electronics parts and components, usually there r electronics technicians there who can virtually help u construct any circuitry as long as u can explain urself clearly.

Wish u well.

Some of the things you mentioned actually can't be gotten till the turbine is already built.
Average wind speed is betwwn 3-4mph (bauchi)
Surface roughness- well, there are tall buildings around (obviously its a shool enviroment), tall trees, generally a lot of structures.
Cut in spped- I believe that's determined when the turbine is already built with the help of an aneometer( I don't have one)
Cut out speed- that depends on my furling calculation, haven't been able to do it because I need the weight of my turbine to do that, I have no motor so I don't know what the weight is going to be, don't want to assume and end up being off totally.
I have not done the strength analysis for the blade I believe it should be strong enough to withstand the stresses however I will have to do it later for my report.
I did this calculation, its in my lapi, no electricity so can't get it for you. ( It is generally assumed to be 6 for a 3 blade turbine which is what I want to do). Mine was below 6

Giving my dilema, as an expert in this field what would you recomend I do?
Any advice would be useful.
The kind of ac/dc motors you tink I should use
The slip rings
Should I use a pulley system

I would appreciate if you mailed me at sadikk99@yahoo.com
Thanks

Dambudzo: Why don't you want to use AC ? Most boosters l know use amplifiers like BJTs. You can just have AC voltage and then connect it to a transformer.

If I should use AC I would need circutry to change it back to DC to charge my battreys, the circuits would be too much, besides from most of the reserch I have done online DC motors are ALWAYS used.
But say I would use an AC motor, which would you recommend?

purpinkx: Saddiq ... Start working lets not be here arguing whether to use A.c or D.c .. I vote D.c (doubler tinx) o ...

Believe me no one wants to get going with this work as much as I want to, but it wouldn't be wise to just jump in and start only to find out when your halfway through, something cannot just work. That's wasted time, effort, money. Something I don't have a lot of.
But as soon as I work out this motor issue, believe me, it'll be hard to keep up.

The_Matrix: There are a lot of materials on the internet these days to help you too. Nonetheless, this forum will help you step by step along the way. since you have finished your feasibility studies, I suggest you start building and ask questions about troubles u encounter along the way, we can throw in one or two helpful suggestions from experience (I don forget plenty tinz sha)
And sorry to digress, did you use AutoCAD '12 or Google sketch for the Turbine diagram u posted?

Thanks, the internet has helped me to the greatest. however, there are things I can't find locally. That's why I am here, so that I'll find people with alternatives. I have started building, and encountered a problem, the motor!
I used google sketchup.

Tony Spike: A closer look at your recommended circuit still brings us the same problem. The input is AC and the output is obviously DC because of diode rectification. I don't know much about voltage multipliers but don't they also rely on AC input? How will the designer generate the required AC input?

That's why I was asking the difference between amplifier/doubler/boost conveter.
I know though the boost is used to increase/decrease dc-dc voltage. So no need for AC.

Stepper motor anybody?
Can somebody enlighten me alil bit on them. I know they are low RPM motors, but would they work? I want to use a booast circute together with it.

swtchicgurl: Let describe a simple wind turbine operation:

*hmm hmm, clears throat*

Like shown in sadiq's diagram, the shaft connecting to the blades is coupled to the rotor of an electric motor.
the rotary action generates some currents (AC) to the stator, don't forget an exciter will be included to generate an initial current.

The winding ratio of rotor to stator will be carefully selected. the AC generated is converted to DC, i.e. consumable energy.

To generate more power, do these:
- get more blades to keep the shaft turning or include an idler/wheel with good weight n xtics
- get mote wind turbines to turn, cos u can't influence the wind xtics
- calculate ur windings and motor features
- balance cost and quality.
- get a good rest after each day's work.

just my 2 cents from the surface, i'll type more details later.

Thanks, for the help. Keep them coming.

Mynd_44: You've got mail

You've got mail.

asunaobi: Hi sadiq! Good job...highly impressed with your logical thinking. Do you know that you can actually drive the same alternator we use in cars to charge our car batteries with the wind turbine you are building? I don't know but I think this may be the easiest way to go.
The car alternator generates 3phase AC voltages when the engine is running. The 3 phase ac is then rectified to Dc voltage. The dc voltage is then used to charge the car battery. There is a control ( contacts) to stop the overcharging of the battery...pls see an auto electrician for this.

The real wind turbine technology is a little bit complex because of the variations in the wind speed, because you would wan't your generated AC voltage to be kept at a constant frequency eg 50 HZ. I hope this helps? Let me know if further assistance is needed.

Thanks bro!
The car alternator is actually reqires high RPM to produce any tangible electricity, about 3000RPM at leaset, the wind I am working with can't produce that. Thanks for the contribution

Dambudzo: I am an Electrical engineer whose focus area is power systems. If you need any help drop a message. Don't use an amplifier, from the electric motor use a step up transformer. With a transformer you don't worry about bias voltages. Another thing, are you going to be generating 3 phase voltages or single phase voltages ? This part is important when it comes to what kind of transformer you will need.

Hi! Sorry I missed out on your little convo with mynd_44
I want to stick to DC and keep it simple, so no transformers. Is amplifier different from a double/boost converter? If they are the same then why shouldn't I use it?
Please mail me if you can at sadikk99@yahoo.com

Mynd_44: This is what mine will be built like

Wow awesome! I haven't done much, just the blades, I considered the vertical axis turbine, but I am alil shot on wind, the reason why I am not so enthusiastic about using a gearing or pulley system.
What motor are you using?
Mail me please sadikk99@yahoo.com

bayulll01: well gud one bro,wish i can help read chemical engin all the best sha

Thanks bro.

ASOROCK b: The day nigeria disintegrates, I guess.

[size=13pt]
Does that mean christains in kano, kaduna, jos and other parts of northern nigeria would disintegrate together with the other part? That is not the solution!
Nigeria can disintegrate, but christains in north can't leave, its their mother land. So let's not be selfish and chant disintegration! Please.[/size]

davechika: sadeeq u cant use a stepper motor to generate that kind of voltage efficiently,use low rpm Dc motor then use a buck or boost conveter but another thing u should consider wats the current produced by such motor at such rpm.
secondly wats the final output of your wind turbine gonna be used for ?
1.to charge a battery which then power an inveter to produce alternating current or wat ?

Oh shoot! You mean if I get say a 24volt with about 200 steps stepper motor I can't get 7 out of it?
I wanted to use an inverter, so I use it to power an energy saving bulb. But decided not to, I haven't really decided yet what to use it to power, because that's not an issue, I can come up with anything at the end, its 12v from a battery.
Which motor would you suggest I get?
Please mail me at sadikk99@yahoo.com

purpinkx: My pleasure ... You need some rest ... Guess these should do 4 a day

purpinkx: My pleasure ... You need some rest ... Guess these should do 4 a day

Thanks again, please try to send me a mail, so we can keep exchanging ideas.

cycober: I know nothing on wind turbines, but maybe some youtube searches can be of great help.
http://www.youtube.com/watch?v=ZN7gkchj1BQ

or simply type wind turbine generator on youtube/google.

Thanks, I did that already.

purpinkx: Try to apply the principle of electric motor split/slip rings

Thanks, I actually was looking for the name. You've been of tremendous help. Thank you.
Expecting.

9ja_I_hail: First click on the section you want to post the thread maybe politics/sports etc. Then look on the top you will see create new topic click it and start ur thread.I hope your question is answered?

Dude thanks man..
You were an very important part in my day today.
Thanks.

I am going to use ball bearings for the yaw, the furling is going to be hinged like a door, but I am afraid my wiring from the motor to the circut on the ground, would get tangled when it twist over and over, back and forth. Any solution guys?

The new design..
It a lil rough though, but you will get the point.

purpinkx: Am not talking of Tv amplifier ... My mistake though .. The name z voltage doubler

Yeah, I have been search online for it. I came across similar info. Its was a very big help, breakthrough, I hope!!

hu$tler:
Attached is a pic of the geared motor i was talking about in my initial post. I don't know if you can find the motor in naija. But just check around. I worked the project in Malaysia back then.

Specification:
DC12V
Output Power: 3.4 Watt
Rated Speed: 34RPM
Rated Current: 0.9A

The is a very good motor for your project. The only draw back of geared DC motors in wind mills is that geared DC motors has a relatively higher starting torque than non-geared ones. But if your blades are designed properly it won't really affect you. I used a standing fan blades for mine and i worked great. Because if your blades are not properly designed to maximize the pressure of the wind speed on the blades then it might not function in the normal Nigerian wind speed which averages 6mph. But you can demonstrate the project by using and external fan to pump air at high speed into the blades.

The other problem with wind mill is that you have to get a stable output. In a real-time application, you can not guarantee a stead wind speed. With this, i used a buck boost converter to stabilize the voltage. you can design a buck boost converter to boost any input voltage between 6V - 12V to give a steady output of 15V...


I hope it helps....

Its wonderful, the high touque might be a little hinge, but I should be able to work though it. I can't use artificial source of wind, my lectures kicked against it, the deal is for me to mount it.
The only problem is I don't know what appliance it is gotten from, this geared motor of yours.
I think I have a new way I want the design to go, I just learnt about this doubler/mutiplier/boost converter today.
I am planing on using a stepper motor, produce some voltage then use the boost converter to take it up to 14volts.
I'll upload the pics for my new design
Please mail me at
sadikk99@yahoo.com
I'll like us to talk some more.
Thanks for your help.

tiarabubu: @sadiq

+1 million likes
+1 billion following

Interesting work.. Keep it up ok?

Thanks man.

AK 48: Nice 1 bro.looking @ ur design and diagrams,I think you r on point,just keep it up.
Btw.I m your brother on this,I read electrical engineering unn,n I ve worked on dc generators n induction motor n gen.
I m gonna send u links where to get precise n detailed info about this,also know about a friend who did something similar.

Bro do you know anything on this voltage mutiplier thing?

Tony Spike: Amplifier circuit? I don't think that is necessary for this kind of work. An amplifier circuit on its own requires an external source of voltage to function which is detrimental to his design here. A miniaturised step-up transformer circuit could be more useful with cascades of resistors to limit the output voltage to the desired value. However, this could complicate your design since what you require is a DC output.

He got me kind of curious, so I surfed the web, still am on the mutiplier thing, and its looking kind of interesting, the downside is a circute, so am kind of in the dark. But if there's anybody that can help out with more explanation on the voltage mutiplier, I'll be more than happy.

Tony Spike: I wish I could help...but I'm more familiar with the electrical aspect of the work, and, not mechanical per se. I wish you the best, bro!

Thanks, anything you can input would help, besides I am have trouble with the electrical part not mechanical.

VEE2010: I'm glad good things are beginning to emanate from Nigeria. Atleast, for thinking aright, the Almighty would give you the rightful thought to complete this project. I believe you can, Bro! Good luck to you, fellow good Nigerian!!

Thank you for the wishes.

hischoice: Hey Sadiq, good work. But I am of the opinion that practicing engineers should be of greater help to you and your cause.
Consider joining the engineering network (www.engineer-ng.net) for free. Share same story and pictures. You will be surprised by how much input you would get from them

Thanks bro, I'll check it out asap.

jocuri: Love your Thread! I think I'm gonna start to build something!

Thank you for inspiration!
+1 follower

I am glad I could do so.

AK 48: Nice 1 bro.looking @ ur design and diagrams,I think you r on point,just keep it up.
Btw.I m your brother on this,I read electrical engineering unn,n I ve worked on dc generators n induction motor n gen.
I m gonna send u links where to get precise n detailed info about this,also know about a friend who did something similar.

That wold be of very much help, thank you.
That design was before I chande some few things, I am working on the new design now. Without pulley. I would upload it when am done.