C6: Carrier Frequency - YASKAWA HV600 Technical Reference

Set this parameter in these conditions:
• If there is vibration in the motor, increase the setting.
• If the motor speed or motor torque response is too slow, decrease the setting.
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C6: Carrier Frequency

C6 parameters select the carrier frequency and set the upper and lower limits of carrier frequencies.
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C6-02: Carrier Frequency Selection
No.
Name
(Hex.)
C6-02 Carrier Frequency Selection
(0224)
Changes to the switching frequency will decrease audible noise and decrease leakage current.
Note:
When you increase the carrier frequency to more than the default setting, it will automatically decrease the drive current rating.
1 : 2.0 kHz
2 : 5.0 kHz
3 : 8.0 kHz
4 : 10.0 kHz
5 : 12.5 kHz
7 : Swing PWM1 (Audible Sound 1)
8 : Swing PWM2 (Audible Sound 2)
9 : Swing PWM3 (Audible Sound 3)
A : Swing PWM4 (Audible Sound 4)
B : Leakage Current Rejection PWM
F : User Defined (C6-03 to C6-05)
Use C6-03 to C6-05 to set detailed setting values.
Note:
• The carrier frequency for Swing PWM 1 to 4 is equivalent to 2.0 kHz. Swing PWM applies a special PWM pattern to decrease the audible
noise.
• Setting B uses a PWM pattern that decreases the leakage current that the drive detects over long wiring distances. This can help decrease
alarm detection and decrease problems with the current monitor from leakage current over long wiring distances.
Symptom
Speed and torque are not stable at low speed.
Speed and torque are not stable at low speed.
Too much leakage current from the drive.
Wiring between the drive and motor is too long.
Audible motor noise is too loud.
Wiring Distance
C6-02 [Carrier Frequency Selection]
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Sets the carrier frequency for the transistors in the drive.
Table 5.30 Guidelines for Carrier Frequency Parameter Setup
Decrease the carrier frequency.
Decrease the carrier frequency.
Decrease the carrier frequency.
Decrease the carrier frequency.
Note:
If the motor cable is too long, it can be necessary to decrease the carrier frequency. Refer to
distance and decrease the carrier frequency.
Increase the carrier frequency. Use Swing PWM.
Note:
The default carrier frequency is Swing PWM 1 (C6-02 = 7), with a 2 kHz base. You can increase the carrier
frequency, but this will also decrease the drive rated current.
Table 5.31 Wiring Distance
50 m (164 ft) Maximum
1 to F (12.5 kHz maximum)
Description
Remedy
100 m (328 ft) Maximum
1 to 2 (5 kHz maximum), 7
5.3 C: Tuning
Default
(Range)
Determined by o2-04
(1 - F)
Table 5.31 for the wiring
More than 100 m (328 ft)
1 (2 kHz maximum), 7
231
5