5.3 C: Tuning
196 YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Note: By changing the Duty Mode selection, the maximum size motor the drive can run changes, and the E2- parameters are
automatically set to appropriate values (E4- for motor 2). Parameters settings determined by motor capacity are recalculated
automatically when the Duty Mode selection is changed. This includes b8-04, L2-03, n5-02, L3-24, 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 helps
lower audible noise and also reduces leakage current.
Note: 1. Increasing the carrier frequency above the default value automatically lowers the drive’s current rating. Refer to Rated Current
Depending on Carrier Frequency on page 444.
2. When using a PM motor, the default carrier frequency is 5.0 kHz. The default is 2 kHz when the drive is set for Heavy Duty
performance, and defaulted to “Swing PWM1” when set for Normal Duty performance.
Settings:
Note: 1. Swing PWM uses a carrier frequency of 2.0 kHz as a base, then applies a special PWM pattern to reduce the audible noise.
2. The value in parenthesis indicates the carrier frequency for AOLV/PM.
Guidelines for Carrier Frequency Parameter Setup
Table 5.17 Wiring Distance and Carrier Frequency
The maximum cable length is 100 m when using OLV/PM (A1-02 = 5) or AOLV/PM (A1-02 = 6).
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 2 kHz 2 kHz Swing PWM
No. Parameter Name Setting Range Default
C6-02
<1> The setting range for models CIMR-A2A0004 to 4A0630 is:
A1-02 = 0, 1, 2, 5: 1 to A, F
A1-02 = 3, 7: 1 to 6, F
A1-02 = 6: 1 to 6
The setting range for models CIMR-A4A0930 to 4A1200 is:
A1-02 = 0, 1, 2, 3, 5, 7: 1, 2, F
A1-02 = 6: 1, 2
Carrier Frequency Selection 1 to F <1>
Determined by A1-02, o2-04.
Reset when C6-01 is changed.
C6-02 Carrier Frequency C6-02 Carrier Frequency C6-02 Carrier Frequency
1 2.0 kHz 5 12.5 kHz (10.0 kHz) 9 Swing PWM 3
2 5.0 kHz (4.0 kHz) 6 15.0 kHz (12.0 kHz) A Swing PWM 4
3 8.0 kHz (6.0 kHz) 7 Swing PWM 1
F User defined (C6-03 to C6-05)
4 10.0 kHz (8.0 kHz) 8 Swing PWM 2
Symptom
<1> The carrier frequency may need to be lowered if the motor cable is too long. Refer to Table 5.17.
<2> In Normal Duty, the carrier frequency default is for Swing PWM (C6-02 = 7), the same as setting 2 kHz. Increasing the carrier frequency is fine
when the drive is set for Normal Duty, but remember that the drive rated current falls when the carrier frequency is increased.
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 <1>
Audible motor noise is too loud Increase the carrier frequency or use Swing PWM. <2>
Wiring Distance Up to 50 m Up to 100 m Greater than 100 m
Recommended setting value for C6-02 1 to F (up to 15 kHz)
1 to 2 (up to 5 kHz),
7 (Swing PWM)
1 (up to 2 kHz),
7 (Swing PWM)
Characteristics Heavy Duty Rating (HD) Normal Duty Rating (ND)
To Next Page
Loading...
Need help?
General
