User`s manual

71
Setting the Carrier Frequency Chapter 6-1
The Inverter cannot maintain rated output current with the carrier frequency
set to a value higher than the default one.
The following table shows the default value and a decrease in the output
current of each Inverter model.
Be sure to use the Inverter so that there will be no decrease in rated output
current.
Set Values
• Normally set n75 to 0.
• When the output frequency is 5 Hz or higher and the output current rate is
110% or less, the carrier frequency will be automatically reduced to 2.5
kHz with n75 set to 1. If the load is heavy at low speed, the Inverter will
withstand higher overcurrent by suppressing the heat radiation of the
Inverter caused by the carrier frequency.
• This function is enabled with 2, 3, or 4 set in n46 for carrier frequency.
Voltage Model
CIMR-J7AZ-
Default setting Rated output
current (A)
Set to 3 Reduced
rated output
current (A)
Set to 4 Reduced
rated output
current (A)
3-phase
200 V
20P1 4 (10 kHz) 0.8 QQ
20P2 4 (10 kHz) 1.6 QQ
20P4 4 (10 kHz) 3.0 QQ
20P7 4 (10 kHz) 5.0 QQ
21P5 3 (7.5 kHz) 8.0 Q 7.0
22P2 3 (7.5 kHz) 11.0 Q 10.0
24P0 3 (7.5 kHz) 17.5 Q 16.5
Single-phase
200 V
B0P1 4 (10 kHz) 0.8 QQ
B0P2 4 (10 kHz) 1.6 QQ
B0P4 4 (10 kHz) 3.0 QQ
B0P7 4 (10 kHz) 5.0 QQ
B1P5 3 (7.5 kHz) 8.0 Q 7.0
3-phase 400 V 40P2 3 (7.5 kHz) 1.2 Q 1.0
40P4 3 (7.5 kHz) 1.8 Q 1.6
40P7 3 (7.5 kHz) 3.4 Q 3.0
41P5 3 (7.5 kHz) 4.8 Q 4.0
42P2 3 (7.5 kHz) 5.5 Q 4.8
44P0 3 (7.5 kHz) 8.6 Q 7.6
n75 Low Carrier Frequency at Low Speed Changes during
operation
No
Setting
range
0, 1 Unit of
setting
1 Default setting 0
Value Description
0 Low carrier frequency at low speed disabled.
1 Low carrier frequency at low speed enabled.