YASKAWA U1000 iQpump Drive, Technical Manual

Page: 234 / 706

<1> Carrier frequency is 3 kHz for models 4 o 0477 to 4 o 0930.
Note: Changing the Duty Mode selection automatically sets the E2- oo parameters to appropriate values (E4- oo for motor 2), and recalculates
parameter settings determined by motor capacity (e.g., b8-04, L2-03, n5-02, C5-17, and C5-37).
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. The upper limit of the carrier frequency depends on the capacity. Refer to Rated Current Depending on Carrier Frequency on page
486 .
2. Increasing the carrier frequency above the default value automatically lowers the drive current rating. Refer to Rated Current Depending
on Carrier Frequency on page 486 .
No. Parameter Name Setting Range Default
C6-02 Carrier Frequency Selection
0 to 4, F
<1> <2>
Determined by A1-02 and o2-04.
Reset when C6-01 is changed.
<1> Setting F is not available when A1-02, Control Method Selection, is set to 6 (AOLV/PM).
<2> Setting range is 1 to 4 and F for models 2
o 0028 to 2 o 0248 and 4 o 0011 to 4 o 0414.
Setting range is 0, F for models 4 o 0477 to 4 o 0930.
Setting 0: 3.0 kHz
Setting 1: 4.0 kHz
Setting 2: 6.0 kHz
Setting 3: 8.0 kHz
Setting 4: 10.0 kHz
Setting F: User defined (C6-03 to C6-05)
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.
<1> The carrier frequency may need to be lowered if the motor cable is too long. Refer to Table 5.17 .
Table 5.17 Wiring Distance and Carrier Frequency
Wiring Distance Up to 50 m Greater than 50 m
Recommended setting value for C6-02 1 to 4 (up to 10 kHz) 1 (up to 4 kHz)
Note: 1. The maximum cable length is 100 m when using OLV/PM (A1-02 = 5) or AOLV/PM (A1-02 = 6).
2. Set C6-02 to 0 (3.0 kHz) for models 4 o 0477 to 4 o 0930 regardless of wiring distance.
n C6-03, C6-04, C6-05: Carrier Frequency Upper Limit, Lower Limit, Proportional Gain
These parameters set a user-defined or a variable carrier frequency. Set C6-02 to F to set the upper and lower limits and the
carrier frequency proportional gain.
No. Parameter Name Setting Range Default
C6-03 Carrier Frequency Upper Limit 3.0 to 10.0 kHz
<1> <2>
Determined by
C6-02 and o2-04
C6-04 Carrier Frequency Lower Limit (V/f Control only)
3.0 to 10.0 kHz
<1> <2>
C6-05 Carrier Frequency Proportional Gain (V/f Control only)
0 to 99
<1> <2>
<1> Available only when C6-02 is set to F.
<2> Setting range is 4.0 to 10.0 kHz for models 2
o 0028 to 2 o 0248 and 4 o 0011 to 4 o 0414. Setting value is 3 kHz for models 4 o 0477 to 4 o 0930.
Setting a Fixed User Defined Carrier Frequency
A carrier frequency between the fixed selectable values can be entered in parameter C6-03 when C6-02 is set to F.
In V/f Control, adjust parameter C6-04 to the same value as C6-03.
5.3 C: Tuning
234 YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual