Other Operation Functions; Carrier Frequency - Omron M1 Series User Manual

8-9

Other Operation Functions

8-9-1

Carrier frequency

Use this function to change the carrier frequency output from the inverter in a PWM waveform.
Set a higher carrier frequency value to reduce the metallic noise from the motor.
However, this results in an increase in electrical noise or leakage current from the inverter.
By setting the level of Motor Sound Tone (3004Hex-1CHex), it may be possible to reduce the metallic
noise generated by the motor. Motor Sound Tone (3004Hex-1CHex) is enabled if the setting of Carrier
Frequency (3004Hex-1BHex) is 7 kHz or below.
Parameter No.
3004Hex-1BHex
3004Hex-1CHex
Related function
• Derating of the output current may be required depending on the installation environment or the set-
ting of Carrier Frequency (3004Hex-1BHex). For derating in each inverter model, refer to A-7 Derat-
ing Table on page A-287.
Set the output current value to be derated as electronic thermal level.
This setting, however, is unnecessary if the electronic thermal level is already set to the derating val-
ue or lower.
For details on the electronic thermal function, refer to 6-3-3 Motor Electronic Thermal Function on
page 6-18.
• Depending on the motor, the effect of Motor Sound Tone (3004Hex-1CHex) may be less. If the level
of Motor Sound Tone (3004Hex-1CHex) is increased too much, the output current may become dis-
ordered, and the machine vibrations or noise may increase.
M1 Series EtherCAT Type User's Manual (I670)
Function name

Carrier Frequency

Motor Sound Tone
Data
0: 0.75 kHz
1: 1 kHz
2: 2 kHz
3: 3 kHz
4: 4 kHz
5: 5 kHz
6: 6 kHz
7: 7 kHz
8: 8 kHz
9: 9 kHz
10: 10 kHz
11: 11 kHz
12: 12 kHz
13: 13 kHz
14: 14 kHz
15: 15 kHz
16: 16 kHz
0: Level 0 (Disable)
1: Level 1
2: Level 2
3: Level 3
Carrier Frequency Automatic Reduction Function
Selection (301FHex-42Hex)
8 Other Functions
Default da-
Unit
ta
2 kHz
0 -
8-99
8