Glossary of Motor Terms
Speed variation rate
In the speed control of a motor, the difference Δω between command value ωC and actual value ω, divided by the command value ωC, is referred to as the speed variation rate and given by:
whereRa= Resistance of armature winding
ΔT= Size of torque variation
A = Controller’s amplification gain
KE = Back-emf constant of the motor
KG = Back-emf constant of the tachometer used in the feedback loop
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
