DE-STA-CO F5-B AC Inverter Drive - Manual (Page 37)

37
U
A
f
In the lower speed range losses in the motor become greater. This
parameter can be used to boost the voltage in order to overcome these
losses. With proper adjustment, the torque output of the motor will remain
constant even at the lowest speeds.
Adjustment range: 0.0...25.5 %
Resolution: 0.1 %
Factory setting: 5.0 %
Adjustment:
1) Determine the load level (CP.3) with no-load operation at the
rated frequency.
2) Then run at about 10 Hz and adjust the torque boost, so
that about the same load level (CP.3) is achieved as with the
rated frequency.
During continuous operation; if the motor operates at low speed
and too much voltage, it can lead to overheating of the motor.
The parameter determines the time needed to accelerate from 0 Hz to
100 Hz. The actual acceleration time is proportional to the frequency
change (delta f).
100 Hz
–––––– x actual acceleration time = CP.7
delta f
Adjustment range: 0.00...300.00 s
Resolution: 0.01 s
Factory setting: 0.15 s
Example: actual acceleration time = 5s; the drive should accelerate from
10 Hz to 60 Hz, delta f = 60 Hz - 10 Hz = 50 Hz
CP.7 = (100 Hz / 50 Hz) x 5 s = 10 s
Adjustment of the Drive
Boost
Acceleration time
100 Hz
CP. 7
f
t
Deceleration time The parameter determines the time needed to decelerate from 100 Hz to
0 Hz. The actual deceleration time is proportional to the frequency change
(delta f).
100 Hz
–––––– x actual deceleration time = CP.8
delta f
CP.6
CP.5
V
0
f