YASKAWA iQpump Micro CIMR-PW Series User Manual page 145

No.
C4-02
Adjustment
Although C4-02 rarely needs to be changed, adjustments may be necessary in the following situations:
• Increase this setting if the motor vibrates.
• Decrease this setting if the motor responds too slowly to changes in the load.
C6: Carrier Frequency
u
C6-02: Carrier Frequency Selection
n
Parameter C6-02 sets the switching frequency of the drive's output transistors. It can be changed in order to reduce audible
noise and also reduce leakage current.
Note: The drive rated current is reduced when the carrier frequency is set higher than the default value.
No. Parameter Name
C6-02 Carrier Frequency Selection
Settings:
C6-02
1 2.0 kHz
2 5.0 kHz
3 8.0 kHz
4 10.0 kHz
5 12.5 kHz
6 15.0 kHz
7 Swing PWM 1
<1> Setting B uses a PWM pattern that reduces the amount of leakage current detected over long wiring distances. This can help reduce alarm detection
and problems with the current monitor that result from leakage current over long wiring distances. This is the same as setting the carrier frequency
to 2 kHz.
Note:
Swing PWM uses 2.0 kHz carrier frequency as a base. Applying special PWM patterns minimizes the audible noise of the motor.
Guidelines for Carrier Frequency Parameter Setup
Speed and torque are unstable at low speeds.
Noise from the drive is affecting peripheral devices.
Excessive leakage current from the drive.
Wiring between the drive and motor is too long.
Audible motor noise is too loud.
<1> The carrier frequency may need to be lowered if the motor cable is too long. Refer to the table below.
<2> Default setting is 7 (Swing PWM), equivalent to setting 2 kHz. Increasing the carrier frequency is fine, but remember that the drive rated current
falls when the carrier frequency is increased.
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual
Parameter Name
Torque Compensation Primary Delay Time 1
Carrier Frequency
Symptom
<1>
Setting Range
Setting Range
1 to B; F
C6-02
8 Swing PWM 2
9 Swing PWM 3
A Swing PWM 4
<1>
Leakage Current Rejection PWM
B
F User-defined (C6-03 to C6-05)
Lower the carrier frequency.
• Lower the carrier frequency
• Set C6-02 to B if an alarm is detected or if leakage current causes a
problem with the current monitor.
Increase the carrier frequency or use Swing PWM.
5.3 C: Tuning
Default
0 to 60000 ms
Default
7
Carrier Frequency
Remedy
<2>
200 ms
5
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