if i have a 12v electric motor, will it last longer if i give it less voltage?



mike

a bit

No not really, what usually wears out is the brushes or the commutator, they are a direct contact pair, the only thing that would make it last longer would be running less RPM's, but only a small amount of incresed life span, nothing you would notice. I guess in theory the decreased voltage = less rpm's, so the answer is yes... sort of, but not really LOL

hmm ok



mike

Thats what i meant by a bit, i jsut didnt want to type it all out and explain it. https://www.nopistons.com/forums/pub...IR#>/bigok.gif

SUUUUUURRREEEE!!!



BOOBIES...

Decreasing voltage wont increase the life at all. The brushes and commutator wear becouse of constant friction. That will stay the same regardless of what voltage they see. The only way voltage really has an effect on a motor's lifespan is in the windings themself. That is where all the action takes place. less amount of turns of wirewith a thicker gauge wire give you more torque and current carrying ability, lots of turns with thin wire give you super high rpm's.



The main thing is to never over juice a motor. That why us guys with hydros allways have trunk fires. We take a 24 volt motor and run between 36 and 96 volts to them @1000+ amps. They don't last long, but damn they move!

whoa mike has a serious question. AMAZING!

yeah really. So what are you doing anyway that you need this info? https://www.nopistons.com/forums/pub...1047683561.gif

i scored myself an electric airpump, and since its just the normal bosch one i was wondering if theres any way to make it live longer



mike

can someone bring the weird mike back. he is being a little too serious in general discussion

I know a lot about electric motors because i use to race hobby-class Radio controlled electric cars and trucks, never got into nitro.



Even if i ahvent messed with them in a long time i can still remember stuff.



https://www.nopistons.com/forums/pub...1047683329.gif

thats exactly why i asked, cause i used to play with rc cars too



mike

it should last a loooong time, the only thing you can do to be on the safe side is do some searching and try and find replacement brushes for it.

i have a nitro car. Cant ever get the damn thing to run correctly https://www.nopistons.com/forums/pub...IR#>/wacko.png

its an rx8 air pump N3H1-13-81XB!



mike

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

thats exactly why i asked, cause i used to play with rc cars too



mike [/quote]

the $300-$400 Nice ones or the radiohut specials?





https://www.nopistons.com/forums/pub...#>/biggrin.png

you wouldnt happen to have the bosch number do you?



mike

you wouldnt happen to have the bosch number do you?



mike [/quote]

I'll go outside and look under the wife's hood. Hopefully the # is visable https://www.nopistons.com/forums/pub...IR#>/bigok.gif

IT's NOT BOSCH! I can't believe it, it's some other german company. go figure

seimans!



mike

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. https://www.nopistons.com/forums/pub...IR#>/bigok.gif

nope I know that one, it's like pienburg so some ****, starts with a P ends in a burg

what TC you got? I got a TC3 but i never raced it really. Came with a low turn D4 modified tho, that was a lotta fun. The magnets on it are busted right now....

lee: we had rc10's and jrxwhatevers



mike

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 https://www.nopistons.com/forums/pub...DIR#>/wink.png

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

Only turn it on when you are at the E-test station.



Ka-Blam, potential eternal life! https://www.nopistons.com/forums/pub...#>/biggrin.png

damn it and i was gonna put it right on the turbo too https://www.nopistons.com/forums/pub...#>/biggrin.png



mike