90
figure; the maximum output voltage V
max
is the output
voltage when output basic running frequency, usually
rated voltage of the motor, as V
max
showed in the
following figure; f
H
, f
L
are defined as upper limit
frequency and lower limit frequency separately, as
showed in figure F0-1:
Figure F0-1 Voltage and Frequency
Notice:
1.
The maximum output frequency, upper limit
frequency and lower limit frequency should be set
cautiously according to nameplate parameter and
running condition of controlled motor, or there would
be damage to the equipment.
2.
Upper limit frequency has valid restriction is to jog
running, while lower limit frequency has no restriction
to jog running.
3.
Apart from upper limit frequency and lower limit
frequency, the output frequency of running VFD is also
restricted by parameters like start frequency, stop DC
braking start frequency, hopping frequency.
4.
The maximum output frequency, upper limit
frequency and lower limit frequency have relations as
showed in figure F0-1, please notice the numerical
value order when setting.
5.
Upper limit and lower limit of frequency are used to
restrict actual output frequency value of motor. If the
set value is higher than upper limit, it runs in upper
limit frequency; if the set value is lower than the lower
limit, it runs in lower limit frequency (the running
condition when set frequency lower than lower limit is
also relevant to function code F1.31 setting); if set
frequency is lower than start frequency, it starts in
zero frequency.
F0.18
Frequency output mode
0~1
0
0: low frequency mode (0.00~300.00Hz)
1: high frequency mode (0.0~3000.0Hz)
High frequency mode is only valid for V/F control.
F0.19
Accelerating time 1
0.1~3600.0S
Depending on model
F0.20
Decelerating time 1
0.1~3600.0S
Depend on model
Accelerating time is the time for VFD to accelerate
from zero frequency to the maximum output
