Environmental Engineering Reference
In-Depth Information
f
295.0
6.67
0.6
3.18
f
175.0
All dimensions in mm
72 Stator slots
87 Rotor bars
Stator I.D.: 235 mm
Stator slot depth: 17.23 mm
Rotor slot depth: 15.40 mm
Stator slot opening: 2.0 mm
Rotor slot opening: 2.0 mm
Figure 5.35 Induction machine for hybrid propulsion starter-alternator ( from
Reference 27)
Without accounting for magnetic saturation in the stator yoke and teeth, and
rotor teeth and yoke, the agreement between experiment and model would not
match as well as it does in Figure 5.36. In Figure 5.37 the non-linear model of the
IM is illustrated on a per-pole basis by reordering the detailed homeloidal model
350
380
300
360
3
48
358
250
Exp.
Model
306
200
248
150
248
100
269
233
50
163
175
0
0
1,000
2,000
3,000
4,000
5,000
Shaft speed (rpm)
Figure 5.36 IM starter-alternator torque versus speed performance
