YASKAWA A1000 Technical Manual page 197


C6-03, C6-04, C6-05: Carrier Frequency Upper Limit, Lower Limit, Proportional Gain
Use these parameters to set a user defined or a variable carrier frequency. To set the upper and lower limits and the carrier
frequency proportional gain, first set C6-02 to F.
No.
C6-03
C6-04
C6-05
<1> In AOLV/PM and CLV/PM control modes, the setting units and range are expressed as a percent (0.0 to 100.0%) instead of in Hz.
<2> The setting range is 1.0 to 5.0 for models CIMR-A4A0515 to 4A1200.
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, parameter C6-04 must also be adjusted to the same value as C6-03.
Setting a Variable Carrier Frequency (V/f Control)
In V/f Control, the carrier frequency can be set up to change linearly with the output frequency. To do this, set the upper
and lower limits for the carrier frequency and the carrier frequency proportional gain (C6-03, C6-04, C6-05) as shown in
Figure 5.43.
Figure 5.43
Note: When C6-05 is set lower than 7, C6-04 is disabled and the carrier frequency will be fixed to the value set in C6-03.

C6-09: Carrier Frequency during Rotational Auto-Tuning
C6-09 determines what the carrier frequency should be while Rotational Auto-Tuning is performed.
This parameter rarely requires adjustment, but can be helpful solving problems with overcurrent when Auto-Tuning a
high frequency motor or a low impedance motor. In such cases, first set C6-03 to high value, then set C6-09 = 1.
Note: This parameter is not available in models CIMR-A4A0930 and 4A1200.
No.
C6-09
Setting 0: Carrier Frequency = 5 kHz
Setting 1: Same value set to C6-03
<1> In PM control mode, this value is 2 kHz.
<2> In PM control mode, this value is the carrier frequency that is set in C6-02.
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
Parameter Name
Carrier Frequency Upper Limit
Carrier Frequency Lower Limit (V/f Control only)
Carrier Frequency Proportional Gain (V/f Control only)
Carrier Frequency
C6-03
C6-04
Figure 5.43 Carrier Frequency Changes Relative to Output Frequency
Parameter Name
Carrier Frequency during Rotational Auto-Tuning
<1>
<2>
Output
× C6-05
Frequency
Output Frequency
E1-04
Max Output Frequency
Setting Range
5.3 C: Tuning
Setting Range
1.0 to 15.0 kHz
<1> <2>
1.0 to 15.0 kHz Determined by C6-02
<1> <2>
0 to 99
<1>
Default
0, 1
Default
0
5
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