One more thing, if you email me direct I can send .jpgs of the fan shroud I made for the Perm 132. Later, Jeff
On 11/7/07, Jeffrey Blamey <[EMAIL PROTECTED]> wrote: > > Sorry I was not clear, my fans force air into the outer openings of the > Perm 132. The Brush housing and slots in the PMG has basically Zero airflow. > And I did a check with the laser temperature sensor and the brushes don't > appear to get anywhere as hot as the rotor and motor housing itself. So if > you were looking at the motor from the side, and the brush cover was on the > left, the shroud forces air in on the left and it vents from the slots in > the right. I did not make a comparison with the laser sensor but if I drove > it medium hard I could make if pretty hot to the touch but still able to > place my hand on it without burning, AFTER the fan was installed the motor > is fairly warm to the touch after medium hard use. I will try to check this > Saturday with the laser sensor, supposed to be high 60s still. Keep in mind > the highest temp I read off of the rotor thru the slots in the case was > posted a while back, I am thinking 254 f, this was 90+ degree day. Hope this > helps. > > Check your motor to see if there is any real airflow thru the brush > housing before you apply air to it, again I think the coils (copper plates > on PM) and housing will have the most heat problem. Cheers, Jeff > > On 11/7/07, lyle sloan <[EMAIL PROTECTED]> wrote: > > > > Going on that squirrel cage theme, I dont know if the > > angle of the brushes will help or hinder the air flow, > > but another option not in your diagrams is via the > > side of the brush housing (black arrows) and then out > > the normal way of the motor. > > > > http://img.photobucket.com/albums/v424/slodown27/AnotherFanflow.jpg > > > > > > --- Jeffrey Blamey wrote: > > > > > I used 6 small mini-pancake fans on a shroud I made > > > from plastic ceiling > > > light trim pieces I found at home Depot. The inside > > > diameter of the hole > > > matched the brush cover of the PMG. I will try to > > > post the pictures so you > > > can view it. I felt pushing the cool(er) air into > > > the unit would be better > > > that pulling is, you have a bit more control. I have > > > found the motor to run > > > cooler. I would start the fan(s) as soon as the bike > > > is turned on so heat > > > cannot build up as easily as turning it on by a > > > thermo switch... if you wait > > > until it is hot the fan will be less effective. Fans > > > generally run on very > > > little current. My DC to DC converter is 200 watts > > > and runs the stock > > > lights, signals, and the six fans no problem. > > > > > > I have heard from someone here that the squirrel > > > cage blowers move more air, > > > my situation with the location of the fans and motor > > > in the chassis > > > precluded the use of a squirrel fan. > > > > > > I am reminded of the early electric cars from the > > > 70s that used the starter > > > motor/generator from a jet engine, it had a circular > > > coupler that allowed an > > > air source to force air into the motor in one > > > location and an air output at > > > the . > > > > > > If I was to approach the problem I would try to > > > establish the air flow > > > possibilities into the motor and out of the motor > > > and make sure the motor > > > case would not allow the air to escape without > > > traversing the whole motor > > > and pulling the heat out of the rotor. So that may > > > mean sealing some air > > > vents mid motor. Hope this makes sense to you. > > > > > > Cheers, > > > Jeff > > > 84 Honda VF Franken'ceptor > > > > > > On 11/7/07, dale henderson > > > < [EMAIL PROTECTED]> wrote: > > > > > > > > i have attached a word doc for this question > > > [sorry for supporting > > > > microsoft, i can reformat it if need be] > > > > > > > > i want to know what is the best way to cool a > > > motor with forced air. the > > > > main two issues is whether to pull or push and > > > where to pull or push > > > > > > > > > > > > > > > > harry > > > > > > > > Albuquerque, NM > > > > > > > http://geocities.com/hendersonmotorcycles/blog.html > > > > http://www.austinev.org/evalbum/1221 > > > > http://geocities.com/solarcookingman > > > > > > > > __________________________________________________ > > > > Do You Yahoo!? > > > > Tired of spam? Yahoo! Mail has the best spam > > > protection around > > > > http://mail.yahoo.com > > > > > > > > > > > > > > > > > __________________________________________________ > > Do You Yahoo!? > > Tired of spam? Yahoo! Mail has the best spam protection around > > http://mail.yahoo.com > > > > >
