YASKAWA CIMR-JC4A0002BAA Quick Start Manual page 97

4.5 Basic Operation
n Carrier Frequency Selection: C6-02
Fixed Carrier Frequencies
The carrier frequency can be set using parameter C6-02 as shown in table below.
Parameter Name
Carrier
C6-02
frequency
Note: Settings 7 through A for parameter C6-02 use a Swing PWM equivalent to a 2 kHz audible noise. This
function turns the motor noise into a less obtrusive white noise.
Note: The upper limit for the carrier frequency is determined by drive capacity.
Precautions when setting parameter C6-02:
Symptom
Speed and torque are unstable at low speeds.
Noise from the drive is affecting peripheral devices.
Excessive leakage current from the drive.
Wiring between the drive and motor is too long.
Motor acoustic noise is too loud.
<1> The carrier frequency may need to be lowered if the motor cable is too long. Refer to the table below.
Wiring Distance
C6-02 (Carrier Frequency Selection)
Carrier Frequency Setting Error (oPE11)
A carrier frequency setup error (oPE11) will occur when carrier frequency gain (C6-05) is
greater than 6 and C6-03 < C6-04.
Note: Refer to Troubleshooting without Fault Display on page 149
n Carrier Frequency and Drive Overload Current Level
The tables below show the drive output current depending on the carrier frequency settings.
The 2 kHz value is equal to the Normal Duty (C6-01 = 1) rated current, the 8/10 kHz value
is equal to the Heavy Duty rated current. The carrier frequency determines the output current
linearly. Use the data below to calculate output current values for carrier frequencies not listed
in the tables.
Note: In Heavy Duty mode the maximum rated output current is equal to the 8/10 kHz value, even if the carrier
frequency is reduced.
96
Description
1 : 2.0 kHz
2 : 5.0 kHz
3 : 8.0 kHz
4 : 10.0 kHz
5 : 12.5 kHz
6 : 15.0 kHz
7: Swing PWM
F : User defined (C6-03 to C6-05)
<1>
Up to 50 m
1 to F (15 kHz)
YASKAWA ELECTRIC TOEP C710606 26B YASKAWA AC Drive – J1000 Quick Start Guide
http://nicontrols.com
Setting Range
1 to F
Possible Solution
Lower the carrier frequency.
Increase the carrier frequency or use Swing PWM.
Up to 100 m
1 to 2 (5 kHz), 7
for information on operator errors (oPE).
Default
Depends on
drive size
Greater than 100 m
1 (2 kHz), 7