User Manual of EM730/EM730E Series Inverter
144
the inverter will work at 0.00Hz within the duration of the forward and reverse dead zone
(F00.22) and then in the opposite direction to the set frequency. See Fig. 7-10.
Duration of
forward and
reverse dead
zone
Duration of
forward and
reverse dead
zone
Output
frequenc
y
Time
Fig. 7-10 Schematic Diagram of Duration of Forward/Reverse Dead Zone
Function
code
Function
code name
Parameter description
Unit
Default
setting
Attribute
F00.23
Carrier
frequency
1.0-16.0 (rated power of the inverter: less than
4.00kW)
1.0-10.0 (rated power of the inverter:
5.50-7.50kW)
1.0 - 8.0 (rated power of inverter 11.00 -
45.00kW)
1.0 - 4.0 (rated power of inverter 55.00 -
90.00kW)
1.0-3.0 (rated power of inverter: 110.00kW and
above)
kHz
4.0 (7.5
and
below)
/2.0
●
Increasing the carrier frequency can reduce the motor noise, but will lead to the heat
increase of the inverter. When the carrier frequency is higher than the default value and
increased by 1kHz, the load needs to be derated to some extent. Please set F00.24=1. The actual
carrier frequency of the inverter will be adjusted automatically according to the actual situation.
The recommended relationship between the rated power and carrier frequency of the
inverter is shown in Table 7-4.
When reverse running is allowed, the running direction of the inverter depends
on the status of the F/R terminal and the set value of F00.20. If the set forward
running direction of the inverter is inconsistent with the desired rotation direction of
the motor, exchange any two of the output terminal wires (U, V, W) of the inverter, or
set F00.20 to the opposite value.
