What is the torque speed characteristic?

the ratio of the relative speed of stator magnetic field with the speed of rotor, to the speed of rotor is defined as slip.

where as in torque slip characteristic is the graph between the speed of the rotor and the torque experienced on the rotor.

in the case of induction motor, the torque decreases with the increase in the rotors speed.

while in the case of sychronous motor, its different (you check out, because i just forgot about it!!

keep smiling!