Rockwell Automation 7000 PowerFlex Medium Voltage (B Frame) Commissioning - ForGe (PanelView 550) - Manual (Page 102)

98 Rockwell Automation Publication 7000-IN006B-EN-P - May 2013
Chapter 5 Commissioning the Drive
Set the Parameter Autotune LLeakage(220) to the measured leakage inductance.
Set L total leakage(P130) in Motor Model equal to Autotune LLeakage. If the
test fails, the interface prompts with a warning.
The following warnings may occur during this test:
• R stator High - this is probably caused by extremely long motor cables
increasing the apparent stator resistance of the motor. The drive cannot
operate with stator resistance greater than 0.50 pu.
• L Leakage Low - indicates that the measured leakage inductance is less
than 0.10 pu. Possible causes are:
– The motor is much larger than the drive and the motor nameplate
parameters do not correspond to the actual motor ratings.
– Because of the design of the motor, this method of measuring leakage
inductance does not produce a valid result. Obtain the leakage
inductance from the motor data sheet, or if this is not possible, set the L
Total Leakage parameter to its default value of 0.20 pu.
• L Leakage High - indicates that the measured leakage inductance is greater
than 0.35 pu. Possible causes are:
– The inductance of long motor cables is increasing the apparent leakage
inductance of the motor. In this case, the measured leakage inductance
is probably correct.
– The motor is very small (leakage inductance generally increases with
decreasing motor size).
– Because of the design of the motor, this method of measuring leakage
inductance does not produce a valid result. Obtain the leakage
inductance from the motor data sheet, or if this is not possible, set the L
Total Leakage parameter to its default value of 0.20 pu.
Flux Speed Regulator (Induction Motors)
This method combines the auto-tuning of the Flux and Speed regulator in a
single step. It calculates parameters, Lm Rated (P131), T Rotor (P132) in Motor
Model Group and Total Inertia (82) in Speed Control group.
During this auto-tune step the motor will run at speed set in Autotune Spd Cmd.
The default setting is 30Hz. Ensure the motor rotates during this auto-tune.
Verify motor rotation physically or by monitoring FlxFbk VoltModel (342). Stall
condition may calculate wrong tuning parameters. If it happens, ensure you set
the tuning parameters Lm Rated, T Rotor, and Total Inertia to default before re-
starting this tuning.
IMPORTANT For synchronous motors, please refer Flux Speed Regulator (Synchronous
Motors) on page 103 .