Yaskawa J7 Drive - Manual (Page 40)

5-5
n46
CARRIER FREQUENCY(kHz) SLOPE OUTPUT FREQUENCY(Hz)
MODE
SETTING Maximum(Fc MAX ) Minimum(Fc MIN )
(=Fc)
Fo
F1 F2
1 2.5 2.5 0 NA NA CONSTANT
2 5.0 5.0 0 NA NA
3 7.5 7.5 0 NA NA
4 10.0 10.0 0 NA NA
7 2.5 1.0 12 83.3 208.3 SYNCHRONOUS
8 2.5 1.0 24 41.6 104.1
9 2.5 1.0 36 27.7 69.4
n46 : Carrier Frequency Upper Limit Factory Setting: 3 or 4 (see table below)
Range: 1 to 4; 7 to 9
The relationship between output frequency and carrier frequency is determined from the set value
of
n46 .
(a) For constant carrier frequency, set to " 1 ", " 2 ", " 3 ", " 4 ".
(b) For synchronous mode, set n46 to " 7 ", " 8 ", or " 9 ". These setting values
establish carrier frequencies of 12f, 24f, or 36f, respectively.
Fc MAX
CARRIER
FREQUENCY
SLOPE
Fc MIN
0 F1 F2
OUTPUT FREQUENCY
5.5 CARRIER FREQUENCY
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.), n46 should be set to 2.5 kHz (data " 1 " )
or less.
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
Input
Old Drive
Model No.
New Drive
Model No.
CIMR-J7AM
Rated
Output
Current (A)
n46 Derated
Output
Current (A) (1)
Factory
Setting
Frequency
(kHz)
JDA001
JDA002
JDA003
JDA005
JDA008
JDA011
JDA017
JDB001
JDB002
JDB003
JDB005
–
–
JDB009
20P10
20P20
20P40
20P70
21P50
22P20
23P70
40P20
40P40
40P70
41P50
42P20
43P00
43P70 0.8
1.6
3.0
5.0
8.0
11.0
17.5
1.2
1.8
3.4
4.8
5.5
7.2
8.6
4
4
4
4
3
3
3
3
3
3
3
3
3
3 10
10
10
10
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
No
Derate
Required
7.0
10.0
16.5
1.0
1.6
3.0
4.0
4.8
6.3
7.6
230V
460V
(1) Derated Output Current values are the maximum currents available with a
carrier frequency n46 setting of “4” (10kHz).