266 Rockwell Automation Publication 520-UM001I-EN-E - July 2016
Appendix J PowerFlex 525 PM Motor Configuration
Optional Parameter
Adjustments for Optimum
Performance
There are a few parameters that you can use to obtain optimum performance
during the test run. Usually, the default value of these parameters work well, but
you may need to adjust them under different conditions.
1. A517 [PM DC Inject Cur]
Maximum DC current in amps applied to the motor in order to reset the
rotor position of a PM motor.
Alignment has failed when fault F012 (HW Overcurrent) or F013
(Ground Fault) is observed during acceleration and deceleration.
Default = 30%
Increase 50 of A517 [PM DC Inject Cur] for each trial when PM speed
response is slow after adding load.
2. A518 [PM Align Time]
Magnetic pole reorientation time.
Alignment failed when fault F012 (HW Overcurrent) or F013 (Ground
Fault) is observed during acceleration and deceleration.
Default = 0.7 s
Increase A518 [PM Align Time] to > 4.7 s.
3. A527 [PM FWKn 1 Kp]
The gain to ensure good performance in field weakening region.
Default = 450%
Increase 100 of A527 [PM FWKn 1Kp] for each trial when PM speed
response is slow after adding load.
Decrease 100 of A527 [PM FWKn 1Kp] for each trial when speed
vibration is observed after adding load.
4. A580 [Current loop BW]
Current loop bandwidth (0 = Auto calculate the control gain of current
loop)
Default = 0 Hz
Increase 50 of A580 [Current Loop BW] for each trial when PM speed
response is slow after adding load.
Decrease 50 of A580 [Current Loop BW] for each trial when speed
instability is observed after adding load.
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