Detailed Function Description
43
Figure 6.2 Effect of carrier frequency.
The following table is the relationship between power rating and carrier frequency.
Carrier f
Model
Highest Carrier f
( kHz )
Lowest Carrier f
( kHz )
Factory setting
( kHz )
G Model: 0.4kW~11kW
P Model: 0.75kW~15kW
15 1 8
G Model: 15kW~55kW
P Model: 18.5kW~75kW
8 1 4
G Model: 75kW~300kW
P Model: 90kW~315kW
6 1 2
Carrier frequency will affect the noise of motor and the EMI of inverter.
If the carrier frequency is increased, it will cause better current wave, less harmonic
current and lower noise of motor.
Notice:
z The factory setting is optimal in most cases. Modification of this parameter is
not recommended.
z If the carrier frequency exceeds the factory setting, the inverter must be
derated because the higher carrier frequency will cause more switching loss,
higher temperature rise of inverter and stronger electromagnetic
interference.
If the carrier frequency is lower than the factory setting, it is possible to cause less output
torque of motor and more harmonic current.
Function
Code
Name Description
Setting
Range
Factory
Setting
P0.12
Motor parameters
autotuning
0: No action
1: Rotation autotuning
2: Static autotuning
0~2 0
0: No action: Forbidding autotuning.
1: Rotation autotuning:
z Do not connect any load to the motor when performing autotuning and ensure
the motor is in static status.
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