BENSHAW RSi GM2 Series, Instruction Manual

Page: 143 / 282

Learning Advanced Features
890054-00-00
GM2 Series VFD 133
Operational Noise Settings (Carrier Frequency
Settings)
Group Code Name Setting Range Unit
Cn
04 Carrier Frequency
1.0HP~5.0HP
(0.75W~4.0kW)
2.0~15.0
kHz
7.5HP~15HP
(5.5kW~11kW)
1.0~15.0
Operational Noise Setting Details
Code and
Features
Description
Cn.04 Carrier
Freq
Power transistors (IGBT) at the output of the inverter generate and
supply a high frequency switching voltage to the motor. This switching
speed is refered to as the carrier frequency. Adustment of the carrier
frequency affects motor operating noise. A higher carrier frequency
reduces operational noise. A lower carrier frequency increases
operational noise.
Refer to the table below for carrier frequency settings according to the load level, control mode,
and capacity.
Capacity
Heavy Duty Normal Duty
Setting Range
Initial
Value
Setting Range
Initial
Value
V/F S/L V/F S/L
Minimum Maximum Minimum Maximum
Minimu
m
Maximu
m
Minimu
m
Maximu
m
1.0HP~5.0HP
(0.75kW~4.0
kW)
2 15 2 15
3
2 5 2 5
2
7.5HP~15HP
(5.5~11kW)
1 15 2 15 1 5 2 5
Note
Higher carrier frequency settings require derating of the output current of the
inverter. For derating specifications, refer to 11.6
Continuous Current Derating on
page 263 .