Calculating RPM of electric motor

[Auxcron]

Good evening

I would like to calculate the RPM of my electric motor. The motor will be mounted on a car and will have to move a mass of approximately 500g. I know that the RPM at 1.5V with no load is 4242 RPM., current of 0.042 A. At maximum efficiency I have 3296 RPM, 0.151 A, Torque 6.8 g-cm, 0.345 W of output Power. Does anybody know how to calculate the required RPM? many thanks guys.

 

[MintJulep]

Power, torque, rpm. All related.

 

[MacGyverS2000]

What does your professor say?


Dan - Owner

http://www.Hi-TecDesigns.com

 

[JStephen]

I see nothing in your statement of the problem that would limit the rpm to a particular number.

 

[LittleInch]

Work out what torque you need to do your duty. You haven't said and we don't know. You've told us some irrelevant info like it's on a car and the mass it has to move but missed out the vital data.

Then either do some tests oo find the torque speed curve for your motor. Simple.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[rb1957]

how much work is required to move your 500g ?

notice too your units are all over the map ... torque in "g.cm" ?? need Nm, rpm to sec^-1, then you can check your power in Watts.

I 2nd MacGyverS2000 ...

another day in paradise, or is paradise one day closer ?