TECHTOP TD20 Series Product Manual page 31

TD20 Series VFD
Function
Name
code
Motor
P00.15 parameter
autotuning
AVR function
P00.16
selection
Detailed instruction of parameters
Motor type
0.4–2.2kW
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 20% 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 (autotune totally); It is suitable in
the cases when the motor can not de-couple from the
load. The antotuning for the motor parameter will impact
the control accuracy.
3: Static autotuning 2 (autotune part parameters); when
the current motor is motor 1, autotune P02.06, P02.07,
P02.08
0: Invalid
1: Valid during the whole procedure
The auto-adjusting function of the VFD can cancel the
impact on the output voltage of the VFD because of the
bus voltage fluctuation.
Factory setting of carrier
frequency
8kHz
-29-
Function Parameters
Default
Modify
value
◎
0
○
1