Has anyone found a 100krpm motor i can use for my quad bike like robot?
I am looking for a fast motor and kids cars are 30krpm so i want at least triple that.
It also should be able t be powered by a relay hopefully.
It should have like 50kg torque too to move me and my robot. Although we won't be that heavy.
No.
You need to look at gearing a lower speed motor .
So like making gears on a low speed motor like a big gear then a small gear?
Would this design i was gonna use with the motor work?
The gear on the pole with the wheels is smaller than the big one
noodlespinbot:
Has anyone found a 100krpm motor i can use for my quad bike like robot?
I am looking for a fast motor and kids cars are 30krpm so i want at least triple that.
It also should be able t be powered by a relay hopefully.
It should have like 50kg torque too to move me and my robot. Although we won't be that heavy.
Ultra high speed motors are available, but they are not cheap, and you almost certainly have no need of
anything but a standard motor.
I've never heard of any traction motor that's anything like that fast. 3000rpm is plenty, and that will require reduction gearing.
Perhaps there's some important detail you've omitted?
For instance you mention "50kg torque" - presumably you mean 50kgf-cm? i.e. 4.9Nm in SI units,
which at 100krpm would be 51kW of power.
Perhaps post details of intended top speed, wheel radius, hill climbing gradient, top speed for the robot so we can understand what's needed.
Thanks
A vacuum cleaner motor is very fast, but it is
a noisy brute. Then there is the turbojet engine.
But, I think the answer is not a fast motor:
more likely a good gear box.
Herb
The motor used in cars for door glasses to go up and down is quite powerful one. It has big gear box on it so great torque as it has to hold the glass weight and so its slow as well.
I don't understand that requirement...
and kids cars are 30krpm
Maybe that's the no-load speed?
My rough calculations say that the tires on my car are turning less than 1000 RPM at 60MPH. Smaller tires have to turn faster but I don't know why you'd need 100,000 RPM...
Some quick Googling tells me Tesla uses approximately 10:1 gear reduction.
And as Mark showed you, torque and speed together make power (horsepower or KW, etc.). A regular DC motor has maximum torque at zero speed and minimum torque at maximum speed. If you want both at the same time, that takes power. On the electrical side power is Voltage and current together (Watts - Voltage x Current).
DVDdoug:
"and kids cars are 30krpm"Maybe that's the no-load speed?
yes, no-load rpm of slot-car motors. Up to 55,000 rpm, maybe more... Slot Car News: Slot Car News Motor List
Hi,
What ground speed are you looking for?
Tom... 
https://imgur.com/ixtU3bT is my movement mechanism.
Thanks for all the help everyone!
https://www.ebay.co.uk/itm/222243085803
Although I can't find a relay a relay for it, i messaged the seller for further details and he he said it is
14Amps DC, shoukd i use a resistor for a bigger, better relay?
TomGeorge:
Hi,
What ground speed are you looking for?Tom...
around quad bike speed
Hi,
After 26 posts, please?
Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html .
Tom...
noodlespinbot:
around quad bike speed
Which is?
Can you tell us your electronics, programming, arduino, hardware experience?
Tom...
TomGeorge:
Which is?
Can you tell us your electronics, programming, arduino, hardware experience?
Tom...
Hi, sorry about not using the forum properly :P...
Also I have a made a few simple circuits and coded with buttons and potentiometers but i have planned and will
try and learn making this. I never thought about high voltages till now though so i think maybe I should save this project for a bit....
noodlespinbot:
around quad bike speed
That is not a useful answer. Numbers and units please.
Please give all of the following:
weight of robot
wheel diameter
gearing ratio (from the diagram you posted it looks to be about 2:3 multiplier gears)
desired top speed
desired hill gradient ability (ie 1 in 10, 10%, whatever)
Preferably in SI units, but in some units definitely! No adjectives, no vague phrases, hard numbers only.
Without this basis of information we can't recommend anything really, all these details matter.