Author Topic: Motor Torque Sanity Check  (Read 2609 times)

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Offline silo_xtremeTopic starter

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Motor Torque Sanity Check
« on: March 06, 2008, 08:52:50 AM »
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?

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Offline Admin

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Re: Motor Torque Sanity Check
« Reply #1 on: March 09, 2008, 11:45:52 AM »
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?
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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