4-222
The impact of 18-00 on the speed and torque are shown in figure 4.3.101
Torque
Speed
Decrease 18-00
Increase 18-00
Figure 4.3.101 18-00 Effect on the torque and speed
18-05: FOC (Flux Orient Control) delay time (18-05)
In the SLV mode, the slip compensation of the magnetic flux depends on the torque current and excitation current.
If the motor load rises above 100% while running at the motor rated frequency, the motor voltage and resistance
drop sharply, which may cause the inverter output to saturate and current jitter may occur.
The magnetic flux slip compensation will independently control the torque current and the excitation current to
prevent increasing and decreasing of the current (jitter). For slow speed or fixed speed operation, 18-05 may be
increased. For fast operation adjust 18-06.
18-06: Slip compensation gain (18-06)
If the motor is jittering at the rated frequency under full load, the value of 18-06 may gradually be reduced to zero
to reduce current jitter.