6-46
Application Manual CDA3000
6 Control modes
Tips and optimization aids
Problem Cause Remedy
• Implausibly high d-current
reference in motors with high
power output
The influence of the fault voltages at high
inverter outputs (typically > 22 kW) and
motors with low stator resistance results in
the magnetizing inductance being identified
too low.
Reduce switching frequency 690-PMFS to
4 kHz during auto-tuning.
• Incorrect number of pole pairs
detected
Enter synchronous speed as nominal speed
or motor with large number of pole pairs
(p>4) and high slip frequency.
Correct rated speed of ASM:
• Check rating plate data
• Consult motor manufacturer or
• Estimate a logical value
and then restart a new auto-tuning process
Enter correct number of pole pairs.
• Torque too low because
operating point wrong
Imprecise data on motor rating plate.
• Check plausibility of rating plate data.
• Rated speed not attainable
because operating point wrong
Imprecise data on motor rating plate.
• Check plausibility of rating plate data.
Table 6.22 Optimization aids
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