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#21
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Very informative post Nutty.
As per always. ![]() Love reading your posts most are informative the balance are just plain funny. I'll try & arc something out on the bike so I can ask how to fix it. ![]() |
#22
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Quote:
Perhaps they do a few tests while winding the last one and adjust it's number of windings to get the desired actual voltage, and not just a theoretical value?
__________________
__________________ "Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God."John 3:5 "Not one dyno run here has seen a 450 4T hit 8HP or a 500-530cc 4T hit 10HP at 3000rpm, EVERY KTM300 pull is over 12HP at the same revs." Expert Tuner Current bike: 2013 Berg 300. Previous: 2006 KTM 300, 2004 KTM 250 EXC, Husky TE 350, DT 200, KDX 200, XT 200, XR 80, XR 75, RM 50 |
#23
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So in the bikes its not a 3 phase current that is rectified to provide an almost true DC?
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#24
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It is on a DRZ (3 yellow wires, around 65V from memory), and could be on other bikes. |
#25
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Mechanical load, windage (aerodynamic) losses and frictional losses.
They design small ones with inbuilt aero drag so they don't overspeed and blow up, I've seen a 415V, 5kW let go though, spectacular. No, not electrical, only as above. Quote:
Quote:
![]() Quote:
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![]() Some low-revving bigger 4Ts run three phase, old XRs etc, not needed on a race bike |
#26
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Bikes that need a decent lighting and charging system are generally 3 phase. Some dirtbikes are only single phase.
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#27
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Thanks Nutty, but you missed a previous question.
If I perform that test with the paper clips, will an armature on the way out give a noticeable drop in the voltage before it actually fails and leaves me stranded? Is it something you check very often?
__________________
__________________ "Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God."John 3:5 "Not one dyno run here has seen a 450 4T hit 8HP or a 500-530cc 4T hit 10HP at 3000rpm, EVERY KTM300 pull is over 12HP at the same revs." Expert Tuner Current bike: 2013 Berg 300. Previous: 2006 KTM 300, 2004 KTM 250 EXC, Husky TE 350, DT 200, KDX 200, XT 200, XR 80, XR 75, RM 50 |
#28
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Other way round my friend, all WRs are single phase, all EXC Katos, all Shercos, All Betas, etc. TMs are optional single/two phase. Very few dirt bikes under 500cc run three phase alternators. |
#29
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Taken from an engineering website
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Not that I doubted you at all Nutty ![]() So in order to avoid being left stranded with a failed alternator, should I get it rewound periodically? It's something that concerns me because it's happened once before and I ride alone a lot.
__________________
__________________ "Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God."John 3:5 "Not one dyno run here has seen a 450 4T hit 8HP or a 500-530cc 4T hit 10HP at 3000rpm, EVERY KTM300 pull is over 12HP at the same revs." Expert Tuner Current bike: 2013 Berg 300. Previous: 2006 KTM 300, 2004 KTM 250 EXC, Husky TE 350, DT 200, KDX 200, XT 200, XR 80, XR 75, RM 50 |
#30
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Quote:
Quote:
You just kicked yourself in the arse. I'm doing the right thing trying to give everyone a bit of electrical insight and I get a non-trained person trying to cloud the waters. I was hoping this forum could be the one place on DBW exempt from narky vacuous fluff but I guess it's endemic..c'est la vie. p.s. 40 years in the trade mate... |
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