YASKAWA GA700 Technical Manual page 772

11.4 C: Tuning
Heavy Duty Rating 1
Item
(HD1)
Overload
Tolerance
Stall Prevent
Level during
Accel
Stall Prevent
Level during
Run
Carrier
Frequency
Note:
• Set the stall prevention level during acceleration with L3-02 and the stall prevention level during run with L3-06.
• Changing C6-01 also changes the maximum capacity of applicable drive motors. The drive automatically changes the setting values
E2-xx and E4-xx to applicable values. The drive also automatically changes these parameters that depend on motor output:
–b8-04 [Energy Saving Coefficient Value]
–C5-17 [Motor Inertia]
–C5-37 [Motor 2 Inertia]
–L2-03 [Minimum Baseblock Time]
–L3-24 [Motor Accel Time @ Rated Torque]
–n5-02 [Motor Inertia Acceleration Time]
■
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:
Increasing the carrier frequency to more than the default setting will automatically decrease the drive current rating.
1 : 2.0 kHz
2 : 5.0 kHz (4.0 kHz for AOLV/PM)
3 : 8.0 kHz (6.0 kHz for AOLV/PM)
4 : 10.0 kHz (8.0 kHz for AOLV/PM)
5 : 12.5 kHz (10.0 kHz for AOLV/PM)
6 : 15.0 kHz (12.0 kHz AOLV/PM)
7 : Swing PWM1 (Audible Sound 1)
8 : Swing PWM2 (Audible Sound 2)
9 : Swing PWM3 (Audible Sound 3)
A : Swing PWM4 (Audible Sound 4)
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 is equivalent to 2.0 kHz. Swing PWM applies a special PWM pattern to decrease the audible
noise.
Symptom
Speed and torque are not stable at low speed. Decrease the carrier frequency.
Audible noise from the drive has an effect on
peripheral devices.
Too much leakage current from the drive.
772
Heavy Duty Rating 2
(HD2)
150% - 60 seconds
150%
150%
2 kHz
V/f CL-V/f OLV CLV
Sets the carrier frequency for the transistors in the drive.
Table 11.40 Guidelines for Carrier Frequency Parameter Setup
Decrease the carrier frequency.
Decrease the carrier frequency.
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Normal Duty Rating 1
(ND1)
Description
AOLV OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Remedy
Normal Duty Rating 2
(ND2)
110% - 60 seconds
110%
110%
2 kHz Swing-PWM
Default
(Range)
Determined by A1-
02, C6-01, and o2-04
(Determined by A1-
02)