"Torque" is the 'oomph' (force) that drives the turning of a shaft.
"Speed" is how fast (velocity) the shaft is turning.
If you have a free-running shaft (good bearings, well lubricated, no load on it) then a very little torque can build up a large speed. I believe at max speed, all the torque is being used to keep the motor spinning. Thus your 'inverse' relationship -- max speed == least available torque. Zero speed == most available torque. This depends on the motor, of course.
If you're HOLDING the shaft so it can't spin in your fingers, you can still feel the torque the motor is putting on the shaft, even though velocity is zero. Don't try this on some big motors, they have so much torque you can't hold the output shaft still, and you might injure yourself.
Since motors are usually driven BECAUSE we want to move a load, you need the 'torque-velocity' curve to be able to predect how well the motor can move something at various speeds.
ltmhall
Posts: 102
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regards peter
"Speed" is how fast (velocity) the shaft is turning.
If you have a free-running shaft (good bearings, well lubricated, no load on it) then a very little torque can build up a large speed. I believe at max speed, all the torque is being used to keep the motor spinning. Thus your 'inverse' relationship -- max speed == least available torque. Zero speed == most available torque. This depends on the motor, of course.
If you're HOLDING the shaft so it can't spin in your fingers, you can still feel the torque the motor is putting on the shaft, even though velocity is zero. Don't try this on some big motors, they have so much torque you can't hold the output shaft still, and you might injure yourself.
Since motors are usually driven BECAUSE we want to move a load, you need the 'torque-velocity' curve to be able to predect how well the motor can move something at various speeds.