5.3 C: Tuning
228
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
Table 5.16 Differences between Heavy and Normal Duty
Note:
By changing the Duty Mode selection, the E2-
parameters are automatically set to appropriate values (E4-
for motor 2).
Parameter settings determined by motor capacity are recalculated automatically when the Duty Mode selection is changed. This
includes b8-04, L2-03, n5-02, C5-17, and C5-37.
■
C6-02: Carrier Frequency Selection
Parameter C6-02 sets the switching frequency of the drive’s output transistors. Changes to the switching frequency can
help lower audible noise and also reduce leakage current.
Note: 1.
The upper limit of the carrier frequency depends on the model.
Refer to Rated Current Depending on Carrier Frequency on
2.
Increasing the carrier frequency above the default value automatically lowers the drive’s current rating.
Depending on Carrier Frequency on page 461
0: 3.0 kHz
1: 4.0 kHz
2: 6.0 kHz
3: 8.0 kHz
4: 10.0 kHz
F: User defined (C6-03 to C6-05)
Guidelines for Carrier Frequency Parameter Setup
Characteristics
<1> The carrier frequency is 3 kHz for models CIMR-U
4
0477 to 4
0930.
Heavy Duty Rating (HD)
Normal Duty Rating (ND)
C6-01
0
1
Performance
Application
Use Heavy Duty Rating for applications requiring a high overload
tolerance with constant load torque. Such applications include extruders
and conveyors.
Use Normal Duty Rating for applications in which the torque requirements
drop along with the speed. Examples include fans and pumps where a high
overload tolerance is not required.
Over load capability (oL2)
150% of drive rated Heavy Duty current for 60 s
120% of drive rated Normal Duty current for 60 s
Stall Prevention during
Acceleration (L3-02)
150%
120%
Stall Prevention during Run
(L3-06)
150%
120%
Default Carrier Frequency
4 kHz
4 kHz
No.
Parameter Name
Setting Range
Default
C6-02
<1> Setting F is not available in AOLV/PM control mode (A1-02 = 6).
<2> Setting range is 1 to 4 and F for models CIMR-U
2
0028 to 2
0248, 4
0011 to 4
0414.
Setting range is 0 and F for models CIMR-U
4
0477 to 4
0930.
Carrier Frequency Selection
0 to 4, F
Determined by A1-02, o2-04.
Reset when C6-01 is changed.
Symptom
<1> The carrier frequency may need to be lowered if the motor cable is too long. Refer to
.
Remedy
Speed and torque are unstable at low speeds
Lower the carrier frequency.
Noise from the drive affects peripheral devices
Excessive leakage current from the drive
Wiring between the drive and motor is too long
Audible motor noise is too loud
Increase the carrier frequency or use Swing PWM.
100%
100%
0
Motor Speed
Rated Load
Overload
150%
Motor Speed
0
100%
100%
120%
Rated Load
Overload
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