Glossary of Motor Terms
Slotless rotor
A rotor where the winding has been fixed to a cylindrical iron core without using slots. This produces extremely low cogging torque. In a slotless construction the torque is exerted directly on the wires (the coil pieces) due to BLI law and Fleming's left-hand rule. Rare-earth or large Alnico magnets are needed in order to get sufficient flux because of the long gap between the rotor core and the pole shoes.
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
