User Manual of A90 Series Inverter
129
Duration of
forward and
reverse dead
zone
Duration of
forward and
reverse dead
zone
Output
frequency
Time
Fig. 7-5 Schematic Diagram of Duration of Forward/Reverse Dead Zone
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
110.00-560.00kW)
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 7-2.
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.
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