YASKAWA V7 Technical Manual page 57

DRIVE DERATING FOR HIGHER CARRIER FREQUENCY
Setting carrier frequency to a value higher than its factory setting requires derating of the drive's output
current - refer to the following table:
Rated Old Drive
input Model No.
MVA001
MVA002
MVA003
MVA005
230V
MVA008
MVA011
MVA017
MVA025
MVA033
MVB001
MVB002
MVB003
460V
MVB005
MVB009
MVB015
MVB018
(1) Output current rating of 21.0A applies only to V74X drive.
(2) Derated Output Current values are the maximum currents available with a
carrier frequency n080 setting of "4" (10kHz).
Carrier frequency should be decreased as the distance between the drive and the motor increases,
to reduce capacitive coupling in the motor leads.
• For wiring distances greater than 100m (328 ft.), n080 should be set to 5 kHz (data " 2 " )
or less.
n175 : Reduce carrier at low speed selection
SETTING DESCRIPTION
0 Disabled
1 Carrier frequency reduced to 2.5 KHz
When n175 is enabled (= "1"), the carrier frequency will automatically be reduced to 2.5 kHz,
regardless of the setting of n080, whenever the output frequency is at or below 5 Hz AND the
output current is above 110% of drive rated current.
New Drive Rated
Model No. Output
CIMR-V7A* Current (A)
20P10 0.8
20P20 1.6
20P40 3.0
20P70 5.0
21P50 8.0
22P20 11.0
23P70 17.5
23P71 25.0
23P72 33.0
40P20 1.2
40P40 1.8
40P70 3.4
41P50 4.8
43P70 8.6
43P70 14.8
43P70 18.0 / 21.0
5-5
n080
Factory Frequency
Setting
4
4
4
4
3
3
3
3
3
3
3
3
3
3
3
(1) 3
Factory Setting: 0
Range: 0 or 1
Derated
Output
Current (A) (2)
(kHz)
10
10
No
Derate
10
10
7.0
7.5
10.0
7.5
16.5
7.5
23.0
7.5
30.0
7.5
1.0
7.5
1.6
7.5
3.0
7.5
4.0
7.5
No Derate
7.5
14.0
7.5
17.0 / 19.8
7.5