The active length of the machine, i.e. the length of the stator and rotor iron cores.
In Emetor, the term machine length is used for the active length of the machine. It does not include bearings, short-circuit rings, end-windings, or fans. This implies that the overall length of the machine is always larger than the length of the stator and rotor iron cores. In Fig. 1, the machine length is indicated on the example of a 4 kW induction motor.
Fig. 1 Illustration of machine length [Source GE Power Systems, USA].
Read about another glossary term