Mechanics and Construction > Mechanics and Construction

Motor Torque Sanity Check

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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%.


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

--- End quote ---
experiment :P

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.

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