On 11/24/06, Jones Beene <[EMAIL PROTECTED]> wrote:
OK for the record, TB is being sarcastic - yes, that generator may have turned out to be only 50% efficient at very low speed, but is still has very high efficiency potential - at anything above a snail's pace - not my fault!
Not scarcism, please! No, you misunderstand, true appreciation since we had found nothing which was comparable. (The humor is in the name "Ecosmart".) http://www.ecosmart.com
Terry asked me to recommend a high efficiency generator, and I sent him the idea and info on rewinding the Ecosmart, which he did. As have others - it is an excellent low cost generator for home windmills etc. This motor is made by Fisher & Paykel in OZ but available here for a fair price. At even 1000 RPM they have told me the generator should be 95% eff. - but hey - Terry wanted to run it a less than 100 RPM ! and without gearing it up !
Ackshully, NZ; but, that could be OZ, too. It is directly driven at 90 RPM; and, I truly believe that it is the best that we could have achieved without a custom built gen.
Bad Idea. Many motors have very high drop-offs in eff. when run out of spec and - worst of all - it would have been relatively easy to gear this thing up with two bicycle sprocket-pairs and chains - if it had been done from the git-go - which they never did. Pity because this generator coulda/shoulda been enough to allow self-power --- if--- that is, Sprain truly does have that much COP margin to play with (despite Terry's formidable skills, I am not convinced of that large margin from what I've seen on the site he has referenced).
Be patient, Jones. My only challenge at this point is the inductance of the 45# custom built EM. But with only 84 mH inductance and 12 ohm resistance, the rise time is only twice the earlier EM, 7 ms.
But then again, nobody slows/tells everything...
Sign the NDA and you will know all. But, it might conflict with your earlier committments. Terry
