Yaskawa CIMR-AU 200V Drives - Manual (Page 168)

n C6-02: Carrier Frequency Selection
Sets the switching frequency of the drive output transistors. Changes to the switching frequency lower audible noise and reduce
leakage current.
Note: 1. Increasing the carrier frequency above the default value automatically lowers the drive current rating.
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 “Swing PWM1” when set for Normal Duty performance.
No. Parameter Name Setting Range Default
C6-02 Carrier Frequency Selection 1 to F <1>
Determined by A1-02, o2-04.
Reset when C6-01 is changed.
<1> The setting range is 1, 2, and F for models 4A0930 and 4A1200
Settings:
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
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
Symptom 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>
<1> The carrier frequency may need to be lowered if the motor cable is too long. Refer to Table 4.11 .
<2> The default carrier frequency in ND is Swing PWM (C6-02 = 7), using a 2 kHz base. Increasing the carrier frequency is permissible when the drive
is set for Normal Duty, however the drive rated current is reduced when the carrier frequency is increased.
Table 4.11 Wiring Distance and Carrier Frequency
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)
Note: The maximum cable length is 100 m when using OLV/PM (A1-02 = 5) or AOLV/PM (A1-02 = 6).
n d1-01 to d1-17: Frequency Reference 1 to 16 and Jog Frequency Reference
The drive lets the user switch between up to 17 preset frequency references during run (including the Jog reference) through
the digital input terminals. The drive uses the acceleration and deceleration times that have been selected when switching
between each frequency reference.
The Jog frequency overrides all other frequency references and must be selected by a separate digital input.
The multi-speed references 1, 2, and 3 can be provided by analog inputs.
No. Parameter Name Setting Range Default
d1-01 to d1-16 Frequency Reference 1 to 16 0.00 to 400.00 Hz <1> <2> 0.00 Hz <2>
d1-17 Jog Frequency Reference 0.00 to 400.00 Hz <1> <2> 6.00 Hz <2>
<1> The upper limit is determined by the maximum output frequency (E1-04) and upper limit for the frequency reference (d2-01).
<2> Setting units are determined by parameter o1-03. The default is “Hz” (o1-03 = 0) in V/f, V/f w/PG, OLV, CLV, and OLV/PM control modes. The
default for AOLV/PM and CLV/PM control modes expresses the frequency reference as a percentage (o1-03 = 1).
Multi-Step Speed Selection
To use several speed references for a multi-step speed sequence, set the H1-oo parameters to 3, 4, 5, and 32. To assign the
Jog reference to a digital input, set H1-oo to 6.
4.6 Basic Drive Setup Adjustments
168 YASKAWA ELECTRIC TOEP C710616 41E YASKAWA AC Drive - A1000 Quick Start Guide