124 Description Of Specific Functions
V260 Series High Performance Closed-Loop Vector Inverter User Manual
7.7 CARRIER FREQUENCY (GROUP F1.1)
F1.1.13 Carrier frequency
Setting range:
1.5~12.0KHz(FF.4.43=##0#)
1.5~15.0KHz(FF.4.43=##1#)
Factory default:
☆
It is the switch frequency determining the inverter’s internal power module. The allowable maximum carrier
frequency is relevant with the inverter model. The carrier frequency mainly influences the audio noise and
heat effect during running. When mute running is required, it is applicable to appropriately increase the value
of the carrier frequency, but the maximum load allowable for the inverter may be somewhat reduced,
accompanied by somewhat increase of interference of the inverter to the outside world.
For the circumstances where the motor wire is too long, it may lead to leaking current between motor wires
and between the wire and the ground. When the ambient temperature is too high and the motor load is too
high, or the inverter is failed due to above reasons, it is suggested to appropriately decrease the carrier
frequency to improve thermal characteristics of the inverter.
F1.1.14 Carrier characteristics
Setting range: 0000~2111
Factory default: 0011
This parameter is used to set some characteristics relevant with the carrier (binary system setting), and
usually needs not be modified.
_ _ _ X : Load linkage adjustment
When this function is effective, if the load current is excessive, the carrier frequency will be automatically
decreased in order to ensure safe running of the inverter.
_ _ X_ : Temperature linkage adjustment
When this function is effective, the inverter will automatically decrease the carrier frequency if the ambient
temperature is too high.
_ X _ _ : Reference frequency linkage adjustment
When this function is effective, the inverter will appropriately decrease the carrier frequency if the output
frequency is too low.
X _ _ _ : Modulation mode
0: Asynchronous modulation
1: Synchronous modulation
When the ratio between the carrier frequency and inverter output frequency is below 20, it is suggested to set
to the synchronous modulation mode so as to promote stability.
2: Noise smoothing
In this mode, the inverter’s carrier frequency is uncertain random value, which is favorable for reducing audio
noise and fixed frequency interference.
