I Reducing motor noise or leakage current (n37) J
Sets inverter output transistor switching frequency (carrier frequency).
Setting Carrier trequency (kHz) Metallic noise Noise and current
from motor leakage
1 2.5
2 5.0 Higher Smaller
3 7.5 _ I
4 10.0
Not
5 12.5 audible Larger
6 15.0
Note : n37 setting
Low-carrier type: 1 (fixed)
Low-noisetype: setting range: I to 6*, factory setdng: 4
* Setting range is l to 4 for software version No. NSP600101 or before.
O
1. Reduce continuous output current for changing the carrier frequency to 5
or6.
Carrier Frequency Maximum Continuous Output Current
Set Value
1 to 4 Up to 100% of inverter rated output current
5, 6 Up to 90% of inverter rated output current
2. Wiring Distance between Inverter and Motor
If the wiring distance between inverter and motor is long, reduce the
inverter carrier frequency as described below.
|
Wiring Distance between
Inverter and Motor Up to 30m Up to 5Om Up to 100m More than 100rr •
Carrier Frequency 15kHz or less 10kHz or less 5kHz or less 2.5kHz
(Setvalue ofconstant n37) (6) (4) (2) (1)
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