11.4 C: Tuning
772 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Item
Heavy Duty Rating 1
(HD1)
Heavy Duty Rating 2
(HD2)
Normal Duty Rating 1
(ND1)
Normal Duty Rating 2
(ND2)
Overload
Tolerance
150% - 60 seconds 110% - 60 seconds
Stall Prevent
Level during
Accel
150% 110%
Stall Prevent
Level during
Run
150% 110%
Carrier
Frequency
2 kHz 2 kHz Swing-PWM
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.
(Hex.)
Name Description
Default
(Range)
C6-02
(0224)
Carrier Frequency
Selection
Sets the carrier frequency for the transistors in the drive.
Determined by A1-
02, C6-01, and o2-04
(Determined by A1-
02)
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.
Table 11.40 Guidelines for Carrier Frequency Parameter Setup
Symptom Remedy
Speed and torque are not stable at low speed. Decrease the carrier frequency.
Audible noise from the drive has an effect on
peripheral devices.
Decrease the carrier frequency.
Too much leakage current from the drive. Decrease the carrier frequency.
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