Page 340 - Compression Machinery for Oil and Gas
P. 340
Drivers Chapter 7 325
300
Design D
250
Torque (%) 200 Design A and B
Design C
150
100
50
0
0 20 40 60 80 100
Speed (%)
FIG. 7.15 Motor torque-speed curves for different NEMA design motors.
FIG. 7.16 NEMA designs—laminations from typical cage induction motors—cross section of the
rotor bars (find clearer pictures of rotor laminations).
