YASKAWA CIMR-VU BA0001 Technical Manual page 156

5.3 C: Tuning
Mode
C6-01
Characteristics
Application
Over load capability (oL2)
L3-02 Stall Prevention
during Acceleration
L3-06 Stall Prevention
during Run
Default Carrier Frequency
Note: By changing the Drive Duty, the drive maximum applicable motor power changes and the E2-oo and E4-oo parameters are automatically
set to appropriate values.
n C6-02: Carrier Frequency Selection
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.
Carrier Frequency on page
No. Parameter Name
C6-02 Carrier Frequency Selection
<1> Setting range is determined by the drive software version.
PRG: 1020 and later: 1 to B; F
PRG: 1018 and earlier: 1 to A; F
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> Available in drive software versions PRG: 1020 and later. 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.
156
Table 5.11 Differences between Heavy and Normal Duty
Heavy Duty Rating (HD)
0
Overload
150 %
Rated Load
100 %
0 Motor Speed
Use Heavy Duty Rating for applications requiring a high
overload tolerance with constant load torque. Such
applications include extruders and conveyors.
150% of drive rated Heavy Duty current for 60 s
150%
150%
8/10 kHz
158.
Carrier Frequency
Symptom
100 %
Use Normal Duty Rating for applications in which the torque
requirements drop along with the speed. Examples include
fans or pumps where a high overload tolerance is not required.
120% of drive rated Normal Duty current for 60 s
Setting Range
<1>
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.
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual
Normal Duty Rating (ND)
1
Overload
120 %
Rated Load
100 %
0
Motor Speed
120%
120%
2 kHz Swing PWM
Refer to Rated Current Depending on
Default
Determined by A1-02 and o2-04.
Reset when C6-01 is changed.
Carrier Frequency
Remedy
100 %