8. Motor Sizing - B-Div-Engineering-Exploration-2023-Odd/Repo09 GitHub Wiki

  • Volume of chassis=Length * Breadth * Height =2(30cm20cm0.8cm) =960cm^3
  • Density of a Foam Sheet=0.48g/cm^3
  • Mass=Volume * Density =960 * 0.048 =460.8g =0.4608kg
  • Mass of wheels=4 * 75g =300g=0.300kg
  • Total mass=0.4908kg
  • Radius of the wheel=4.5cm
  • Force=total mass * gravitational acceleration =0.4908 * 9.8=4.80984N
  • Torque=Force * Radius =4.80984 * 0.45=2.16423Ncm
  • Factor of safety(FOS)=1.5total torque =1.5 * 2.16423=3.246345kgcm
  • According to this calculation the selected DC motor is 60RPM 12V DC motor.