Parameter Descriptions 2-47
7000-TD002A-EN-P – September 2007
Autotune Q-axis Magnetizing Inductance [Autotune Lmq]
Linear Number: 325
Default Value: 100 pu
Minimum Value: 0 pu
Maximum Value: 1000 pu
Access Level: Advanced
Read/Write: Read/Write
This parameter specifies the value of q-axis magnetizing inductance for synchronous machines
determined during flux regulator auto-tuning. If the magnetizing inductance measurement is successful,
then parameter Lmq (296) in the Motor Model group is set equal to the value of this parameter. If the
magnetizing inductance measurement fails, then parameter Lmq is not changed. This parameter is not
used for induction motors.
Autotune DC Current Bandwidth [Autotune Idc BW]
Linear Number: 212
Default Value: 50.0 r/s
Minimum Value: 10.0 r/s
Maximum Value: 100.0 r/s
Access Level: Advanced
Read/Write: Read/Write
This parameter specifies the bandwidth of the current regulator during auto-tuning of the dc link reactor
time constant. A lower bandwidth is used during auto-tuning than during normal operation because a
slower response can be measured more accurately. The bandwidth is set to original value after
completion of auto-tune.
Autotune DC Current Command [Autotune Idc Cmd]
Linear Number: 210
Default Value: 0.500 pu
Minimum Value: 0.100 pu
Maximum Value: 0.900 pu
Access Level: Advanced
Read/Write: Read/Write
This parameter specifies the dc current command used during auto-tuning of the dc link time reactor
constant. If the value of this parameter is set too low, the dc link current may become discontinuous and
the auto-tuning may produce invalid results.
Autotune DC Current Step [Autotune Idc Stp]
Linear Number: 211
Default Value: 0.250 pu
Minimum Value: 0.000 pu
Maximum Value: 0.500 pu
Access Level: Advanced
Read/Write: Read/Write
This parameter specifies the value of the step that is added to the dc current command during auto-tuning
of the dc link reactor time constant. If the value of this parameter is set too high relative to the dc current
command, the dc link current may become discontinuous and the auto-tuning may produce invalid
results.
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