LiteOn EVO 6800 Series, Manual

Page: 105 / 261

105
C6 Carrier Frequency

C6-00 Carrier Frequency Selection
Sets the switching frequency of the drive output transistors. Adjust this setting to reduce
audible noise and leakage current.
Note:
1. If this level is set higher than the default setting, the drive rated current will be decreased. Refer to Table 6.11 on
page 107.
2. The default setting is 2 in PM motor control, 8 (8kHz) in IM motor HD mode and 2 (2kHz) in IM motor ND mode.
No. Name Setting Range Default
C6-00 Carrier Frequency Selection 0 to 16 Determined by A1-02 and o2-03. Once
A1-06 is redefined, the default will be
changed accordingly
C6-00 Carrier Frequency C6-00 Carrier Frequency C6-00 Carrier Frequency
0 Determined by C6-01
to C6-03
6 6 kHz 12 12kHz
1 Retain 7 7 kHz 13 13 kHz
2 2 kHz 8 8 kHz 14 14kHz
3 3 kHz 9 9 kHz 15 15kHz
4 4 kHz 10 10 kHz 16 16kHz
5 5 kHz 11 11 kHz
Setting Carrier Frequency
Situation Solution
Speed and torque fluctuate at low speeds
Lower the carrier frequency
The drive noise affects peripheral devices
Excessive leakage current from the drive
Cable connecting the drive and motor is too
long<1>
Loud noise from the motor Increase the carrier frequency <2>
<1> If the cable is too long, lower the carrier frequency according to the follow instructions.
<2> If ND mode is selected in A1-06, the default carrier frequency is 8kHz which is very close to the setting of 2kHz
The carrier frequency can be increased in ND mode. However the higher the setting is, the smaller the current will
be.
Cable Length Less than 50 m Less than 100 m More than 100 m
C6-00 2 to 16 ( excluding 16 kHz ) 2 to 5 2