First of all thank you all , iam really happy for all the inputs.
I am sorry i do some times ask too many questions .
well yes its a DIY all the way but a diy shouldn't necessary be rough around the edges .
by spending a little more time and spend a few extra bucks and involve people and practice it can be perfect .
Thats why i plan to build the 1kw first then the 5 kw.
As for the electronics your totally right my plan to use logic controller i found a ready made one called Crouzet millennium 3 its a very good PLC and/or i will build my own controller from adrunio uno it will pick up shaft speed using a hall effect sensor from the low speed shaft after the turbine and anther speed sensor from the high speed shaft and temp from the motor and then control the the turbine. a fail safe module will be a a temp normaly open sensor which when the motor overheat will trigger the brake mechanism which consist of pneumatic operate brake using a modified car brake system and a car brake rotor or i will make an electromagnetic brake which is connected also to the low speed shaft.
as for tower again your totally right again. i did some research i found a publication by a gentleman called John Corbett Nicholson google "Design of wind turbine tower and foundation
systems: optimization approach" it can be a good start .
Plus towers are stationery items which give indications long time before failure and a strain sensor ( costs 3 usd thanks to ebay ) can give data about the tower problems.
i will start anther thread with calculations when i start my build just for the pole.
Am also planning to built a gearbox but not my self i will give the plans to a machine shop .
my approach is different .Am not looking for the cheapest or easiest or most efficient wind turbine to build am planning to build the best turbine which require little maintenance and safe to operate "headache free".
As for inverters and switches i was under the impression that a grid tie squirrel cage or induction motor just connects to the main power and whenever the speed is more than the motor speed you generate electricity so why the inverters?
thanks for the links but your website sometime is on and sometimes its says "cannot establish a connection " but i find a very useful information where it connects .
your wrong man your turbine is 300 kw as per the Chinese standards and dont forget to add a TYPE R sticker you will get anther 50 kw x)
9 Years is impressive please throw a link where you got your plans from. i would love to build it as well .
Also if you have a build diary i would love to see your build.
First of all your not being rude your actually talking about things that alot of diy people dont think about or simply ignore (safety ,neighbors, insurance or not being responsible) .
"Safety Means " not to harm people , property ,animals. main concern no flying parts and no fire.
when people built unsafe wind turbines and it start making news it will lead governments to just ban /restrict them . just like quadcopters (many countries banned the use of quadcopters).
I Live aborad ,not in the US and i do live in a kinda of suburbia where i can park everything in front of my house
and for the law its as simple as if you break it you repair/replace it. there is enough space ,but space shouldn't be my or anybody else safe factor .
i do have experience with petrol and diesel generators , i do some camping and i own a 10 kw silent diesel and 3kw petrol for the camping trips. and i repair/service them my self thats why i didnt say any car alternator non senses but one generator i came across is the Chinese 2 stroke brushless motor (the ones usually sold on sale below 80$.). Its a 2 pole rotor and 3 phase stator connected to a capacitor. no AVR (automatic voltage regulator ) no brushes . turning the thing generates 12 volt at 163 RPM .and 110 volt 800 watt at 1500 rpm.
as the PV i don't have anything against them .and i will put some PV's over my roof but i do get a good wind on my area and i just purchased a logging anemometer to get the an accurate data of the wind so why shouldn't i put a nice looking wind turbine .
How are you planning to get an induction motor to run at a fixed speed on a wind turbine? That is going to take some specialised electronics ( read expensive to control the load to get the fixed speed ( but not fixed output) or some expensive mechanical AND electronics for a variable pitch prop.... again with variable output. Myself I'd be letting the turbine run any speed it wanted within a range and letting the controller buck or boost the output.
well its a good idea if you have a way to grid tie it without batteries (if you have please let me know) .
my electricity company is the best "battery " plus i am under the assumption that all alternators need speed to make real power so a transmission is a must .
as for electronics and mechaincals they are not expensive at all especially electronics using electronic modules and items that are used for something else .
A truck clutch servo is a pneumatic pump which can be used for force furling or whatever you want to do , it have a large amount of power and designed for harsh environment with a price tag of 50 usd.
as for speed control, blade drag even though i don't fully understand is also a way to avoid over speed.
if you want more info on the fixed speed wind turbine visit http://www.prairieturbines.com/
they have a good info but i hope they are still in business.
well i dont have everything figured out thats why i started this thread to serve as a way of brain storming session .