Changing Carrier Frequency To Reduce Noise And Magnetic Noise; F300: Carrier Frequency Setting; F312: Random Switching Setting - Toshiba TOSVERT VF-AS3 Instruction Manual

6. 14 Changing carrier frequency to
<F300: Carrier frequency>
<F312: Random switching>
<F316: Carrier frequency control>
4
■ Function
4
The inverter noise can be reduced by decreasing the carrier frequency.
You can respond to unpleasant motor magnetic noise by increasing the carrier frequency or
changing the tone with the random switching.
6
Adjustment of carrier frequency is effective when a resonance with a load machine or motor fan
cover occurs.
However, note that a low carrier frequency causes the motor magnetic noise to increase, and a high
carrier frequency causes the inverter noise to increase.
■ Parameter setting
9
Title
F300
F312
F316
*1 Depending on capacity. For details, refer to [11. 6].
■ <F300: Carrier frequency> setting
Some models require current reduction depending on the <F300: Carrier frequency> setting and
ambient temperature.
■ <F312: Random switching> setting
When you want to reduce the motor magnetic noise with a low carrier frequency, set <F312:
Random switching>. The tone can be changed.
6. [Advanced] How to use parameters
reduce noise and magnetic noise
Parameter name
Carrier frequency
Random switching
Carrier frequency control
F300 : Carrier frequency
Min: 1.0
X1000
Adjustment range
*1
Depending on capacity
0: Disabled
1: Random switching 1
2: Random switching 2
3: Random switching 3
0: No decrease
1: Valid decrease
2: No decrease, 480V class
3: Valid decrease, 480V class
4: No decrease with sinusoidal filter
5: Valid decrease with sinusoidal filter
6-52
E6582062
STOP 0.0Hz
13:14
4.0
kHz
Max: 16.0
X100 X10 X1
Unit Default setting
kHz
*1
0
*1