SHENZHEN ENCOM ELECTRIC TECHNOLOGIES CO. EN500 Series Service Manual page 125

7 Detailed function specification
150%
100%
50%
F04.09 Carrier frequency
Carrier freq. mainly affects motor noise and heat loss when running. Relationship
among carrier freq, motor noise, and leak current is as follows:
When carrier freq. goes up (↑), the motor noise is reduced (↓), leakage current of
the motor is increased (↑), and the interference is increased (↑);
When carrier freq. goes down (↓), the motor noise is increased (↑), leakage current
of the motor is decreased (↓), and the interference is decreased (↓).
When the ambient temperature is high, and the motor load is heavy, reduce the
carrier freq. properly to reduce thermal loss to the inverter.
Model
0.4KW～1.5KW
2.2KW～11KW
15KW～55KW
75～200KW
220KW above
1.To get better control characteristic, it is suggested that the ratio
of max. running frequency between carrier frequency and inverter
be not smaller than 36.
Note 2.Error exists in current displayed value when carrier frequency is
small.
118
Output current
Before slip compensation
Fig. 7-10 Slip freq. Compensation
Table7-1 model and Carrier freq. relationship
Max. Carrier freq.
Slip compensation is 100%
After slip compensation
Motor revolving speed
Range: 0.5～16.0K
16KHz
16KHz
8KHz
6KHz
4KHz
Depend on
type
Factory Default
6KHz
5KHz
4KHz
2KHz
2KHz