LSIS LSLV-S100 - Operational Noise Settings (Carrier Frequency Settings)

176
Learning Advanced Features
5.17 Operational Noise Settings (carrier frequency
settings)
Group
Code
Name
LCD Display
Parameter Setting
Setting Range
Unit
Cn
04 Carrier Frequency Carrier Freq 3.0
1.0–15.0
kHz
05 Switching Mode PWM* Mode 0 Normal PWM
0–1
-
* PWM: Pulse width modulation
Operational Noise Setting Details
Code
Description
Cn.04 Carrier Freq
Adjust motor operational noise by changing carrier frequency settings. Power
transistors (IGBT) in the inverter generate and supply high frequency switching
voltage to the motor. The switching speed in this process refers to the carrier
frequency. If the carrier frequency is set high, it reduces operational noise from the
motor, and if the carrier frequency is set low, it increases operational noise from
the motor.
Cn.05 PWM Mode
The heat loss and leakage current from the inverter can be reduced by changing
the load rate option at Cn.05 (PWM Mode). Selecting 1 (LowLeakage PWM)
reduces heat loss and leakage current, compared to when 0 (Normal PWM) is
selected. However, it increases the motor noise. Low leakage PWM uses 2 phase
PWM modulation mode, which helps minimize degradation and reduces
switching loss by approximately 30%.
Item
Carrier frequency
1.0kHz
15kHz
Low Leakage PWM
Normal PWM
Motor noise
↑ ↓
Heat generation
↓ ↑
Noise generation
↓ ↑
Leakage current
↓ ↑
Note
Carrier Frequency at Factory Default Settings (0.4–22kW)
• Normal load: 2kHz (Max 5kHz)
• Heavy load: 3kHz (Max 15kHz)
S100 Series Inverter Derating Standard
•
S100 inverter is designed to respond to two types of load rates. Heavy load (heavy duty) and normal