Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive - Air-Cooled (A Frame) - Manual (Page 218)

4-64 Commissioning
7000A-RM001A-EN-P – January 2011 7000 “A” Frame
Idc Reference
Idc Feedback
63%
0%
Figure 4.18 – Current Regulator Tuned Correctly
11.
Set parameter CurReg Bandwidth to the normal value of 200
rad/sec. Confirm that the rise time of the current feedback is
now approximately 5 ms and that the overshoot is not excessive.
12.
Set parameter Idc Ref Step to zero. The dc link current will
return to a steady level given by Idc Test Command.
13. Stop the drive. Set parameters Operating Mode to Normal, and
Idc Test Command to 0.000pu.
2. Motor Impedance
The motor impedance tuning function calculates stator resistance R
Stator (129) and total leakage inductance L Total Leakage (130) in
Motor model Group. These parameters are used in the reconstruction
of the rotor flux. If these parameters are not adjusted correctly, the
resulting distortion in the flux feedback may cause speed feedback or
motor synchronization errors. These parameters must be tuned
during commissioning because it is affected not only by motor
parameters, but also by cable length. The tuning should be done with
the motor stationary.
A T T E N T I O N A T T E N T I O N In the following steps, the rotation of the motor in
an undesirable direction may occur. To guard
against possible equipment damage, it is
recommended that the motor is disconnected from
the load and tested for direction prior to
proceeding, should the equipment be sensitive to
reverse direction rotation.
The following auto-tune procedure can be followed.
Tuning Procedure (cont.)