Kruger Ecowatt K320 Series Operation Manual page 145

Ecowatt Drive K320 series
®
Function
Name
code
Motor parameter
P00.15
autotuning
Description
The relationship between models and
carrier frequencies is as follows:
Model
2.2–15kW
Higher than 18.5kW
Advantage of high carrier frequency: ideal
current waveform, little current harmonic
wave and motor noise.
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
interference will increase.
On the contrary, an extremely-low a
carrier frequency may cause unstable
operation at low frequency, decrease the
torque, or even lead to oscillation.
The carrier frequency has been properly
set in the factory before the VFD is
delivered. In general, you do not need to
modify it.
When the frequency used exceeds the
default carrier frequency, the VFD needs to
derate by 10% for each increase of 1k
carrier frequency.
Setting range: 1.2–15.0kHz
0: No operation
1: Rotary autotuning 1.
Comprehensive motor parameter
autotuning. It is recommended to use
rotating autotuning when high control
accuracy is needed.
2: Static autotuning 1 (comprehensive
autotuning); static autotuning 1 is used in
-136-
Default carrier
frequency
4kHz
2kHz
electrical magnetic
Function parameter list
Default Modify
0
◎