Unitronics UMI-B1 UL Series Operation Manual page 35

UMI-B1 UL Series Inverter
Function
Name
code
Carrier
P00.14 frequency
setting
Motor
P00.15
parameter
Detailed instruction of parameters
Carrier
Electromagnetic
frequency
noise
High
1kHz
10kHz
Low
15kHz
The relationship table of the motor type and
carrier frequency:
Motor type
0.5~3HP
(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 inverter
temperature and the impact to the output
capacity. The inverter 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 inverter is in
factory. In general, users do not need to
change the parameter.
When the frequency used exceeds the
default carrier frequency, the inverter needs
to derate 20% for each additional 1k carrier
frequency.
Setting range: 1.0–15.0kHz
0: No operation
1: Rotation autotuning
Noise and leakage
Heating
current eliminating
Low
High
Factory setting of
carrier frequency
8kHz
33
Function parameters
Default
Modify
value
Low
High
Depend
on model
0
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