I have knowledge about the definitions about both speed as well as of the torque. But I am unable to think dc motors in terms of speed and torque. When the armature of a dc motor rotates , we call it torque because of rotational movement about the fixed axis. So where is speed?
Electronic – Difference between torque and speed in dc motor
dc motorspeedtorque
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Best Answer
We don't call it torque, we call it speed aka rpm or rotational speed.
The force that it takes to spin at a certain speed we call torque and usually, for a dc motor high speed means low torque and high torque means low speed. Look at this formula for the mechanical power output of a motor: -
Power out = \$2\pi n T\$
Where n is speed in revolutions per second or, if you wish \$2\pi n\$ is radians of rotation per second. and T is torque.
For a constant power out n.T must be constant.