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gamerguy007 (December 31, 1969 at 4:59 pm)
uh, check out Tesla Motors
adamslurch71 (December 31, 1969 at 4:59 pm)
I know, I understand and now reading what I typed before I see where I messed up, I was rather tired and not thinking. Sorry for any confusion and sounding like a moron. I was trying to state that if need be the motors can hit speed only dreamed of by internal combustion engines. One of those things that most people can relate to is speed. Now if you had the same gearing as a Tesla and put a 150,000 rpm motor to it, imagine the speeds...I am a Salt Flat speed junky, sorry.
tsport100 (December 31, 1969 at 4:59 pm)
For peak efficiency under constantly variable load try 3 phase AC induction motors with PID feedback slip control.
Using ANY kind of mechanical transmission results in huge power loss, up to a 30-40% is common.
Forget about circuit racing suspension theory and unsprung weight, all engineering is a compromose. Wheel motors fall well within accepted corner weight limits. The advantage of wheel motors is 100% efficient transmission and regeneration between motor and wheel.
galactophore (December 31, 1969 at 4:59 pm)
There is a maximum hp for electric motors, coincidently when max hp is reached max efficiency is reached, also the rpm that all this is achieved is dependent upon the specific load. If anyone has found a way to achieve peak efficiency through an electric motor's rpm with varying load please educate me. The closest, I know, of achieving this is a cvt transmission or maybe even the ivt transmission though the ivt fundamentally flawed. That and in wheel motors have TOO MUCH UNSPRUNG WEIGHT!!!
tsport100 (December 31, 1969 at 4:59 pm)
No price is specified!
An electric motor has 1 moving part, an internal combustion engine has over 600 moving parts, which do you think logically would be cheaper to make?
dutchovenbakery (December 31, 1969 at 4:59 pm)
these motors are great. the only obstacle if you think about it is PRICE or economics, man. any other things like batteries, range , speed, ect. can be easily overcome. there are advancements made seems like every day. But Price is the main factor for us "People". i make minimum wage, so really can't afford a ford hi-bread. back in the 60s and 70s someone earing minimal wage could buy a new car without financing, because times were better. It is NOT the battery , but Cost.
tsport100 (December 31, 1969 at 4:59 pm)
You're getting your facts mixed up
1) The Tesla motor does 14,000rpm but it has an 8.25:1 reduction gear.
2) 14000/8.25 = 1696 rpm at the wheel
3) With a 17" wheel approx 1500rpm = 105mph so the Tesla has a top speed of approx 120mph with 1 gear.
You are right that wheel motors don't need a transmission but motor rpm only needs to be 1500rpm.
adamslurch71 (December 31, 1969 at 4:59 pm)
You don't need transmissions to run an in wheel motor, those things can easily run up to 20,000rpm or something like that. A close example is the Tesla roadster, not in wheel motors but it can run 65mph without any transmission.
gruszczynski811170 (December 31, 1969 at 4:59 pm)
awesome idea, I should make 1 for my motorcycle
skyelevator (December 31, 1969 at 4:59 pm)
That could double as an eletronica video. |
