Neil wrote:
cupra wrote:
snip

http://tinyurl.com/eqzf6

(takes you to)

http://www.diy.com/diy/jsp/bq/nav/na...1598796 93901

It's quoted at 1kW for wind speeds of 12.5m/s so I'll look at my
data logs (W.Somerset) with interest this winter to see what any
payback would really be....

Looking at the mechanics, it appears to be a fairly standard 6 pole
motor directly coupled to the turbine itself - let's hope they've
got the axial and radial load calculations correct.....


The B&Q units will be on-line between approx 4.5 to 14 M/S (9 to 31
mph) so they seem to have a reasonable operating range.

I wonder what the output is at lower wind speeds?

I feel a bit of number crunching with excel coming on!

If you're bored,

Power = (torque * speed) / /9550)

where speed = motor (generator) shaft speed in rpm, power in Watts and
torque in Nm....

Don't forget to factor the losses in the motor (iron loss, copper loss,
windage loss and frictional loss) plus the control gear power losses as well