Vicruns 2S-0.4G-B, User Manual

Page: 137 / 300

Chapter 6 Description of Function Codes
This function adjusts the carrier frequency of the inverter. By adjusting the carrier frequency,
the motor noise can be reduced, the resonance point of the mechanical system can be avo-
ided, the line-to-ground leakage current can be reduced, and the interference generated by
the inverter can be reduced.
When the carrier frequency is low, the higher harmonic components of the output current inc-
rease, the loss of the motor increases, and the temperature rise of the motor increases.
When the carrier frequency is high, the motor loss decreases and the motor temperature rise
decreases, but the inverter loss increases, the inverter temperature rise increases, and the
interference increases.
Adjusting the carrier frequency affects the following performance:
Function
code
Name
Description
(setting range)
Factory
Default
Change
P0-26 Carrier frequency 0.5kHz ～ 16.0kHz
Model is
determined
☆
Motor noise Leakage current
Carrier frequency Low → High
Motor noise Big → Small
Output current waveform Bad → Good
Motor temperature rise High → Low
Inverter temperature rise Low → High
Leakage current Small → Large
External Radiation Interference Small → Large
Inverter power
Carrier frequency
range
Factory default
carrier frequency
0.75kW ～ 5.5kW 0.5kHz ～ 16.0kHz 6.0kHz
7.5kW ～ 75kW 0.5kHz ～ 16.0kHz 4.0kHz
90kW ～ 450kW 0.5kHz ～ 16.0kHz 2.0kHz
The factory setting of carrier frequency is different for inverters of different power. Although
the user can modify it according to the needs, it should be noted that if the carrier frequency
is set higher than the factory value, the temperature rise of the inverter radiator will increase.
At this time, the user needs to derate the inverter, otherwise the inverter will be in danger of
overheating alarm .
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