Motor Torque Sanity Check

[silo_xtreme]

Hi everyone,

I'm looking at a BLDC motor that has 4000 rpm, and provides 200W; which tells me that Torque is ~4.22 lb-in.

If i lower the rpm (via gears) to 100 rpm, I believe the theoretical Torque would be 4.22 lb-in * 40, resulting in a Torque of ~ 168.8 lb-in.

How would I know if the motor can actually support that amount of Torque?

[Admin]

Well, if you use gears, you will take an efficiency loss. Without knowing your system, I'd say ~80%.

How would I know if the motor can actually support that amount of Torque?

experiment

If you use my RMF calculator, you can determine torque by knowing velocity from an experiment. Or you can find the stall torque by forcing your motor from rotating.