C6: Carrier Frequency - YASKAWA E1000 Technical Manual

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C4-02: Torque Compensation Primary Delay Time
Sets the delay time used for applying torque compensation.
No.
C4-02
Adjustment
Although C4-02 rarely needs to be changed, adjustments may help in the following situations:
• If the motor vibrates, increase C4-02.
• If the motor responds too slowly to changes in the load, decrease C4-02.

◆ C6: Carrier Frequency

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C6-02: Carrier Frequency Selection
Parameter C6-02 sets the switching frequency of the drive's output transistors. Changes to the switching frequency helps
lower audible noise and also reduces leakage current.
Note: 1. Increasing the carrier frequency above the default value automatically lowers the drive's current rating.
Depending on Carrier Frequency on page
No. Parameter Name
C6-02 Carrier Frequency Selection
<1> The setting range is 1, 2, and F for models CIMR-E4A0515 to 4A1200.
Settings:
C6-02 Carrier Frequency
1 2.0 kHz
2 5.0 kHz
3 8.0 kHz
4 10.0 kHz
Note: Swing PWM uses a carrier frequency of 2.0 kHz as a base, then applies a special PWM pattern to reduce the audible noise.
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 the table below.
Wiring Distance
Recommended setting value for C6-02
Note: The maximum cable length is 100 m when A1-02 = 5 (OLV/PM).
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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> The setting range is 1.0 to 5.0 for models CIMR-E4A0515 to 4A1200.
YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual
Parameter Name
Torque Compensation Primary Delay Time
164.
C6-02
5
6
7
8
Symptom
<1>
Up to 50 m
1 to F (up to 15 kHz)
Parameter Name
Carrier Frequency Upper Limit
Carrier Frequency Lower Limit (V/f Control only)
Carrier Frequency Proportional Gain (V/f Control only)
Setting Range
1 to F
<1>
Carrier Frequency
12.5 kHz
15.0 kHz
Swing PWM 1
Swing PWM 2
Lower the carrier frequency.
Increase the carrier frequency or use Swing PWM.
Up to 100 m
1 to 2 (up to 5 kHz), 7 (Swing PWM)
1.0 to 15.0 kHz
1.0 to 15.0 kHz
5.3 C: Tuning
Setting Range Default
0 to 60000 ms Determined by A1-02
Refer to Rated Current
Default
Determined by A1-02, o2-04.
C6-02 Carrier Frequency
9 Swing PWM 3
A Swing PWM 4
F User defined (C6-03 to C6-05)
Remedy
Greater than 100 m
1 (up to 2 kHz), 7 (Swing PWM)
Setting Range Default
<1>
Determined by C6-02
<1>
0 to 99
<1>
5
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