The advantage of high carrier frequency: ideal
current waveform, little current harmonic wave
and motor noise.
The disadvantage of high carrier frequency:
increasing the switch loss, increasing VFD
temperature and the impact to the output capacity.
The VFD needs to derate on high carrier
frequency. At the same time, the leakage and
electrical magnetic interference will increase.
Applying low carrier frequency is contrary to the
above, too low carrier frequency will cause
unstable running, torque decreasing and surge.
The manufacturer has set a reasonable carrier
frequency when the VFD is in factory. In general,
users do not need to change the parameter.
When the frequency used exceeds the default
carrier frequency, the VFD needs to derate 10%
for each additional 1k carrier frequency.
Setting range: 1.0–15.0kHz
0: No operation
1: Rotation autotuning
Comprehensive motor parameter autotune
It is recommended to use rotation autotuning
when high control accuracy is needed.
2: Static autotuning 1
It is suitable in the cases when the motor cannot
de-couple from the load.
3: Static autotuning 2
It is suitable in the cases when the motor cannot
de-couple form the load. But only for parts of
parameters.
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