YASKAWA P1000 Technical Manual page 105

Guidelines for Carrier Frequency Parameter Setup
Speed and torque are unstable at low speeds
Noise from the drive affects peripheral devices
Excessive leakage current from the drive
Wiring between the drive and motor is too long
Audible motor noise is too loud
<1> The carrier frequency may need to be lowered if the motor cable is too long. Refer to
<2> The default carrier frequency is Swing PWM (C6-02 = 7), using a 2 kHz base. Increasing the carrier frequency is permissible , however the drive
rated current is reduced when the carrier frequency is increased.
Wiring Distance
Recommended setting value for C6-02
n C6-05: Carrier Frequency Proportional Gain
Sets 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.
C6-05 Carrier Frequency Proportional Gain (V/f Control only)
Setting a Fixed User-Defined Carrier Frequency
A carrier frequency between the fixed selectable values can be entered in parameter C6-03
In V/f Control, adjust parameter C6-04
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 by setting the upper and lower
limits for the carrier frequency and the carrier frequency proportional gain (C6-03
5.17.
Note:
When C6-05 is set lower than 7, C6-04
<1> Details on this function can be found in the standard P1000 Technical Manual (SIEPCYAIP1U01) at www.yaskawa.com.
YASKAWA SIEP YAIP1B 01B YASKAWA AC Drive – P1000 Bypass Technical Manual
Symptom
<1>
Table 5.7 Wiring Distance and Carrier Frequency
Up to 50 m
1 to F (up to 15 kHz)
Parameter Name
<1>
to the same value as C6-03
Carrier Frequency
C6-03
C6-04
Figure 5.17 Carrier Frequency Changes Relative to Output Frequency
<1>
is disabled and the carrier frequency will be fixed to the value set in C6-03
Lower the carrier frequency.
Increase the carrier frequency or use Swing PWM.
Table 5.7.
Up to 100 m
1 to 2 (up to 5 kHz),
7 (Swing PWM)
<1>
.
<1>
Output
x C6-05
Frequency
Output Frequency
E1-04
Max Output Frequency
5.3 C: Tuning
Remedy
<2>
Greater than 100 m
1 (up to 2 kHz), 7 (Swing PWM)
Setting Range
Determined by
0 to 99
<1>
when C6-02 is set to F.
<1>
, C6-04 , C6-05) as shown in
<1>
Default
C6-02
Figure
5
.
105