Rockwell Automation SA500 AC Power Modules - Manual (Page 43)

Installation Guidelines 4-15
Constant power capability is only available for applications using induction motors with
Vector - Speed Loop Enhanced regulators. You need to select Constant Power on the
Motor Data parameter entry screen to enable constant power operation.
If application performance in the constant power region is at expected levels, you do
not need to perform the following calibration procedure.
If application performance in the constant power region is not at expected levels, you
may be able to improve it by changing the Iz current values stored in the STATOR_IZ
tunables. See table 4.5. The default current values were chosen to work with a wide
variety of motors. The performance of a specific motor may be improved by performing
the following calibration procedure. This procedure determines the motor’s custom
current values and stores them in the STATOR_IZ tunables.
Figure 4.5 – Typical Motor Operation in the Constant Torque and Constant Power Regions
Pt. 1
Pt. 2
Pt. 3
Pt. 4
Pt. 5
Pt. 6
Pt. 7
Pt. 8
Pt. 9
Pt. 10
Constant Torque
Operating Range Constant Power
Operating Range
Rated Motor
Voltage
Rated Motor
Torque
Motor Speed