I am working on a 500 kg roller, which I want to pull using electric motor. I am considering hub motor, since it is easier to frame a basic ev with it. Now I need to know the capacity of the hub motor, I need to choose.
Roller weight = 500 kg
Frame weight + driver weight = 150 kg
speed required = 10 km/hr
Surface on which the roller is to run is predominantly flat.
Being new to such design projects, I may have missed details. Please ask me for them. Help me with the calculation.
Thanks to another contributor in another forum, he helped find the folling resistance;
The closest coefficient of friction, I am able to find is;
I took this from; www.engineeringtoolbox.com
Fr = c * mass * acc. due to gravity
Fr=0.08 * 650 * 9.81
= 510.12 N
But we are already talking in terms of weight, so are we already done with our m.g calculation, so is my 650 kg already W, so Fr = 0.08 * 650 ?
If so, Fr = 52 N
The surface I am going to roll the roller on is a play ground with grass grown on a field level hardened soil.
Roller weight = 500 kg
Frame weight + driver weight = 150 kg
speed required = 10 km/hr
Surface on which the roller is to run is predominantly flat.
Being new to such design projects, I may have missed details. Please ask me for them. Help me with the calculation.
Thanks to another contributor in another forum, he helped find the folling resistance;
The closest coefficient of friction, I am able to find is;
| 0.04 - 0.08 | car tire on solid sand, gravel loose worn, soil medium hard |
I took this from; www.engineeringtoolbox.com
Fr = c * mass * acc. due to gravity
Fr=0.08 * 650 * 9.81
= 510.12 N
But we are already talking in terms of weight, so are we already done with our m.g calculation, so is my 650 kg already W, so Fr = 0.08 * 650 ?
If so, Fr = 52 N
The surface I am going to roll the roller on is a play ground with grass grown on a field level hardened soil.