I want to use motor amps from say a 40 hp motor, to estimate the tons per hour of rock being carried by the conveyor. I am wondering if the relationship is linear with respect to motor amps? Any idea? TPH = Factor * motor amps - factor2, what do you think?
2007-02-28 15:29:22 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
TPH should be linear with torque no problem. However, torque vs. current is likely not linear. Motor efficiency would need to be constant for linear relationship of input (Amp x Volt) vs. output (Torque x RPM), but efficiency may go down a lot at higher loads.
Can you get a motor test curve from your motor manufacturer? They provide this plot: with torque on X-axis, and Amps and other parameters on Y-axis. So you can pinpoint torque vs. amps on this plot. This should be the best way.
Or I guess if you have a way to test your system.... you can test at at least 3 different loads, then you'll know if it is close enough to linear.
2007-03-01 06:23:31 · answer #1 · answered by pj_gp18 3 · 1⤊ 0⤋
The motor torque should be proportional to the conveyor load, and is proportional to current (until the motor stalls)
2007-03-01 02:50:30 · answer #2 · answered by Helmut 7 · 0⤊ 1⤋
Torque is proportional to current. So you need to know how much torque is needed to move your tons of rock. It would depend on friction on the conveyor and slope of conveyor, etc.
2007-02-28 23:37:52 · answer #3 · answered by rscanner 6 · 1⤊ 1⤋