chapter  15
27 Pages

IM DESIGN BELOW 100KW AND CONSTANT V AND f (Size Your Own IM)

The power of 100kW is traditionally considered the border between small and medium power induction machine. In general, sub 100 kW motors use a single stator and rotor stack (no radial cooling channels) and a finned frame washed by air from an externally mounted at shaft end ventilator (Figure 15.1). It has an aluminum cast cage rotor and, in general, random wound stator coils made of round magnetic wire with a 1 to 6 elementary conductors (diameter ≤ 2.5mm) in parallel and 1 to 3 current paths in parallel, depending on the number of pole pairs. The number of pole pairs 2p1 = 1, 2, 3, …6.