YASKAWA F7 Programming Manual page 44

• If the wiring length between the Drive and the motor is long, decrease the carrier frequency
Wiring Length
C6-02 (carrier frequency) setting
• If speed and torque are inconsistent at low speeds, decrease the carrier frequency
• If leakage current from the Drive is large, decrease the carrier frequency
• If the audible motor noise is too great, increase the carrier frequency (may require Drive current derating)
When parameter C6-02 is set to "0: Low Noise" the Drive uses a carrier frequency of 2 kHz and reduces the motor audible noise
by approximately 5 dB. over the conventional 2 kHz setting (C6-02= 1). The Drive modulates the nominal PWM pattern to
achieve the lower noise. This setting is normally used with high starting torque loads that are frequently started and stopped or,
applications where leakage current needs to be minimized and motor audible noise is important.
If parameter C6-01 = "0: Heavy Duty", C6-02 can only be set to 0 or 1.
Model C6-02
CIMR- Carrier Frequency
F7U Frequency
(kHz)
20P4 4 (10.0)
20P7 4 (10.0)
21P5 4 (10.0)
22P2 3 (8.0)
23P7 4 (10.0)
25P5 6 (15.0)
27P5 6 (15.0)
2011 3 (8.0)
2015 4 (10.0)
2018 4 (10.0)
2022 4 (10.0)
2030 4 (10.0)
2037 2 (5.0)
2045 2 (5.0)
2055 3 (8.0)
2075 1 (2.0)
2090 1 (2.0)
2110 1 (2.0)
C6-03 Carrier Frequency Upper Limit
C6-04 Carrier Frequency Lower Limit
Setting Range: 0.4 to 15.0 kHz
Factory Default: Model Dependent
C6-05 Carrier Frequency Proportional Gain
Setting Range: 0 to 99
Factory Default: 0
Table 2 Wiring Length and Carrier Frequency
1 to 6 (15 kHz max.)
Table 3 Carrier Frequency Parameter Defaults (C6-01=2: Normal Duty 2)
208V-240V Drives 1
C6-03 C6-04
Carrier Carrier C6-05
Frequency Carrier
Max. Min. Frequency
(kHz) (kHz) Gain
4 (10.0) 4 (10.0) 0
4 (10.0) 4 (10.0) 0
4 (10.0) 4 (10.0) 0
3 (8.0) 3 (8.0) 0
4 (10.0) 4 (10.0) 0
6 (15.0) 6 (15.0) 0
6 (15.0) 6 (15.0) 0
3 (8.0) 3 (8.0) 0
4 (10.0) 4 (10.0) 0
4 (10.0) 4 (10.0) 0
4 (10.0) 4 (10.0) 0
4 (10.0) 4 (10.0) 0
2 (5.0) 2 (5.0) 0
2 (5.0) 2 (5.0) 0
3 (8.0) 3 (8.0) 0
1 (2.0) 1 (2.0) 0
1 (2.0) 1 (2.0) 0
1 (2.0) 1 (2.0) 0
164 ft or less 328 ft or less
1 to 4 (10 kHz max.)
Model C6-02
Nominal CIMR- Carrier
HP F7U Frequency
(kHz)
0.5/0.75 40P4 6 (15.0)
1 40P7 6 (15.0)
1.5/2 41P5 6 (15.0)
3 42P2 6 (15.0)
5 43P7 6 (15.0)
7.5 45P5 6 (15.0)
10 47P5 6 (15.0)
15 4011 3 (8.0)
20 4015 4 (10.0)
25 4018 4 (10.0)
30 4030 3 (8.0)
40 4037 3 (8.0)
50 4045 3 (8.0)
60 4055 2 (5.0)
75 4075 2 (5.0)
75/100 4090 3 (8.0)
125 4110 2 (5.0)
150 4160 2 (5.0)
4185 1 (2.0)
4220 1 (2.0)
4300 1 (2.0)
Programming 36
Over 328 ft
1 to 2 (5 kHz max.)
480V Drives 1
C6-03 C6-04
Carrier Carrier C6-05
Frequency Frequency Carrier
Max. Min. Frequency
(kHz) (kHz) Gain
6 (15.0) 6 (15.0)
6 (15.0) 6 (15.0)
6 (15.0) 6 (15.0)
6 (15.0) 6 (15.0)
6 (15.0) 6 (15.0)
6 (15.0) 6 (15.0)
6 (15.0) 6 (15.0)
3 (8.0) 3 (8.0)
4 (10.0) 4 (10.0)
4 (10.0) 4 (10.0)
3 (8.0) 3 (8.0)
3 (8.0) 3 (8.0)
3 (8.0) 3 (8.0)
2 (5.0) 2 (5.0)
2 (5.0) 2 (5.0)
3 (8.0) 3 (8.0)
2 (5.0) 2 (5.0)
2 (5.0) 2 (5.0)
1 (2.0) 1 (2.0)
1 (2.0) 1 (2.0)
1 (2.0) 1 (2.0)
Nominal
HP
0 0.5/0.75
0 1
0 1.5/2
0 3
0 5
0 7.5
0 10
0 15/20
0 25
0 30
0 40/50
0 60
0 75
0 100
0 125
0 150
0 200
0 250
0 300/350
0 450
0 500+