1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Optimal gear ratio

  1. Apr 6, 2005 #1
    Hi, I am doing a project that involves an electric motor that winches an object upward pulling it by a string, over a given distance and I need help to calculate an optimal gear ratio, if that is possible. This is how far I have got...

    Variables
    torque/rpm
    gear ratio

    Constants
    distance object travels
    mass of object
    motor input

    to make it simple i am only using one gear, the motor shaft

    acceleration of object = (f/m - 9.8)
    velocity of string = RPM x pie x motor shaft diameter

    assuming initial v=0,
    the derivative of (f/m - 9.8)=RPM x Pie x Shaft diameter

    i am trying to find a correlation between the average velocity the object takes to cross a given distance and the shaft diameter (gear ratio), im guessing its a parabola, but how can i do this? plz help thnx
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted