YASKAWA
SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
231
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.
◆
C6: Carrier Frequency
C6 parameters
select the carrier frequency and set the upper and lower limits of carrier frequencies.
■
C6-02: Carrier Frequency Selection
No.
(Hex.)
Name
Description
Default
(Range)
C6-02
(0224)
Carrier Frequency Selection
Sets the carrier frequency for the transistors in the drive.
Determined by o2-04
(1 - F)
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.
Table 5.30 Guidelines for Carrier Frequency Parameter Setup
Symptom
Remedy
Speed and torque are not stable at low speed.
Decrease the carrier frequency.
Speed and torque are not stable at low speed.
Decrease the carrier frequency.
Too much leakage current from the drive.
Decrease the carrier frequency.
Wiring between the drive and motor is too long.
Decrease the carrier frequency.
Note:
If the motor cable is too long, it can be necessary to decrease the carrier frequency. Refer to
for the wiring
distance and decrease the carrier frequency.
Audible motor noise is too loud.
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
Wiring Distance
50 m (164 ft) Maximum
100 m (328 ft) Maximum
More than 100 m (328 ft)
C6-02 [Carrier Frequency Selection]
1 to F (12.5 kHz maximum)
1 to 2 (5 kHz maximum), 7
1 (2 kHz maximum), 7
Summary of Contents for H6B1A002
Page 12: ...12 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference...
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Page 454: ...5 14 Z Bypass Parameters 454 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference...
Page 590: ...8 6 Storage Guidelines 590 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference...
Page 780: ...11 3 European Standards 780 YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference...
