BENSHAW Rsi S Series, Инструкция по эксплуатации

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Learning Advanced Features
178
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)
”S” Series inverter Derating Standard
•
”S” Series inverter is designed to respond to two types of load rates. Heavy load (heavy duty) and
normal load (normal duty). The overload rate represents an acceptable load current that exceeds