hi, i have 8000 lb machine it has 4 wheels (just like car), i want it to move on 2 ft/sec speed on cast iron wheels with steel track at flat surface. radius of every wheel in 5 inch. what will be the torque required to move this machine?? and what will be the torque on each wheel?? i want to put two motors on two drive wheels... and which type of motor is suitable in 3 phase motors please help... thanx in advance
Torque = Thrust Force * Radius of wheel Thrust Force = Load (8000 Lb ) * gravity * coefficient friction of wheel
Just to be clear as your question sounds like you are asking what torque would get you 2ft/s. Torque is a force not equated to speed. You will need to calculate what RPM you need to get 2ft/s based on your tire radius. Assuming you can handle this calc? A motor manufacture will then provide a RPM vs Torque curve and make sure this is in the range you need. To go with mymachineinfo comment. Make sure you understand and consider the difference between static vs kinetic friction. So your vehicle can start from a stop position do not want to have to give it a swift kick to get it going.
Your vehicle weights too much, fortunately speed is low and you can use normal motors connected with gearboxs to increase the torque and reduce the speed. As @CPPMable pointed out, motor selection prime for your requirement.
