GE AF-650 GP Design Manual page 83

Unit Sizes 2x
For the Unit Sizes 2x and 3x the derating also depends on the overload mode selected in par. H-44 Constant or Variable Torque OL
60º AVM - Pulse Width Modulation
4
Illustration 4.6: Derating of I
2x, using 60º AVM in High torque mode (160% over torque)
Illustration 4.8: Derating of I
2x, using 60º AVM in Normal torque mode (110% over torque)
Illustration 4.10: Output current derating with switching fre-
quency and ambient temperature for frame size B2, 60º AVM.
Note: The graph is drawn with the current as absolute value
and is valid for both high and normal overload.
82
for different T for Unit Size
out AMB, MAX
for different T for Unit Size
out AMB, MAX
SFAVM - Stator Frequency Asyncron Vector Modulation
Illustration 4.7: Derating of I for different T
out
2x, using SFAVM in High torque mode (160% over torque)
Illustration 4.9: Derating of I for different T
out
2x, using SFAVM in Normal torque mode (110% over torque)
Illustration 4.11: Output current derating with switching fre-
quency and ambient temperature for frame size B2, SFAVM.
Note: The graph is drawn with the current as absolute value
and is valid for both high and normal overload.
AF-650 GP Design Guide
for Unit Size
AMB, MAX
for Unit Size
AMB, MAX