Question About Electric Motors
06-04-2003, 06:19 PM
#21
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Join Date: Nov 2001
Location: NJ
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Originally Posted by j9fd3s' date='Jun 4 2003, 06:13 PM
[quote name='turbovr6' date='Jun 4 2003, 03:10 PM'] nice score!!
just so you know most newer VW's (97-up) use an electric airpump, they are a dime a dozen in the bone yards
just so you know most newer VW's (97-up) use an electric airpump, they are a dime a dozen in the bone yards
mike [/quote]
I'll go outside and look under the wife's hood. Hopefully the # is visable
06-04-2003, 07:21 PM
#24
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Join Date: Nov 2002
Location: Colorado Springs
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drilling a blind hole in the center of the brush will increase the motor's wattage output, and increase the life of the brushes. I did this all the time with my 1/10 modified class touring car, 55,000 rpm motor would eat a set of Silver brushes in 5 minutes. You can also experiment with the positioning of the hole to change the comm's timing. 
06-04-2003, 07:45 PM
#26
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Join Date: Nov 2002
Location: Cincinnati, Oh hi hoe!
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Originally Posted by Apex13B' date='Jun 4 2003, 04:21 PM
drilling a blind hole in the center of the brush will increase the motor's wattage output, and increase the life of the brushes. I did this all the time with my 1/10 modified class touring car, 55,000 rpm motor would eat a set of Silver brushes in 5 minutes. You can also experiment with the positioning of the hole to change the comm's timing.
06-05-2003, 01:29 AM
#28
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Location: IL
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using softer springs on the brushes will increase commutator and brush life.
having a true commutator makes it possible to run even softer springs because the brushes won't start floating due to a comm that is out of round... I don't know what these components will be like in a rx-8 air pump though. but if your comm is out of round it needs stronger springs to keep the brushes in contact with the comm...
I think lowering the voltage might improve the lifespan if the rpm is lowered as a result, just less wear on the comm and brushes.
I wouldnt worry about the internal winds too much as long as the pump doesnt run hot, if it gets hot then I can imagine it's possible to get an internal short if it gets too hot and the insulation fails, causing a premature failure... just don't mount it close to your header
having a true commutator makes it possible to run even softer springs because the brushes won't start floating due to a comm that is out of round... I don't know what these components will be like in a rx-8 air pump though. but if your comm is out of round it needs stronger springs to keep the brushes in contact with the comm...
I think lowering the voltage might improve the lifespan if the rpm is lowered as a result, just less wear on the comm and brushes.
I wouldnt worry about the internal winds too much as long as the pump doesnt run hot, if it gets hot then I can imagine it's possible to get an internal short if it gets too hot and the insulation fails, causing a premature failure... just don't mount it close to your header
06-05-2003, 02:01 AM
#29
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Join Date: May 2003
Location: Los Angeles CA
Posts: 67
What would be nice is to get a brushless motor configuration, If a mod can be done and you are looking for longevity, then brushless would be a good alternative because the only points of contact are the bushings/bearings, there is no commuter or brushes. Plus they give ample amounts of torque an are zero maintence type motors, they are only starting to peer their heads into the Radio Control world, but they have been around for quite some time. Look at your ordinary house fan, brushless motor, or your radiator fan, those are usually brushless as well. I know its not related but if your interested in more info on brushless motors, I know www.teamnovak.com has some info, they're in the process of developing a brushless R/C Solution. Too bad I got out of R/C racing before they came around.
bah just my babbling
bah just my babbling
