Glossary of Motor Terms
Stall torque
A value of torque that causes the motor to stop when subjected to a load torque higher than it. As shown in the figure below, the starting torque is lower than the stall torque for a typical squirrel-cage type motor. In a hysteresis motor, the starting torque is equal to the stall torque.

Term List (S)
- Salient-pole torque
- Salient-pole rotor-stator
- Sensorless drive
- Separately-excited DC motor
- Shaft, shapes of
- Simulation
- Sinusoidal voltage
- Skew,Skewed slots
- Slip ring
- Slot liner
- Slotless rotor
- Slot-pole combination
- Slots and teeth
- Small electrical motor
- Solenoid
- Space factor, Slot fill factor
- Speed control
- Speed variation rate
- Spindle motor
- Squirrel cage rotor
- Squirrel-cage induction motor
- Stall torque
- Starting torque
- Sturgeon's motor
- Switched reluctance motor
- Switched reluctance motor, Early
- Switching elements
- Synchronous speed