SV800/SV800A User Manual 7 Detailed function description
159
No.
Name
Set range
Factory default
d2-18
Droop control selection
0
～
1
0
d2-19
Droop start speed/frequency
0.0%
～
100.0%
0.0%
d2-20
Droop rate switching speed/ frequency
0.0%
～
100.0%
0.0%
d2-21
Droop rate
0.0%
～
50.0%
0.0%
d2-22
Droop start torque
0.0%
～
90.0%
0.0%
Various settings of droop control (no motor switching) may be used to balance multiply motor
torques. It’s effective in both vector control mode and V/F control mode. d2-19 and d2-20 are
set according to the percentage of E0-00 (rotation speed/ frequency upper limit).
The function selected by d2-18. It is also can be prohibited by the multi-function terminal
(H1-XX = 26) even if the droop function is selected by d2-18.
0:OFF
1:ON
The droop function takes effect when the speed is higher than the value in d2-19. It maintains at
the setting value when the output frequency less than the set value.
d2-20:
The switching speed/ frequency point of different droop rates. When the set frequency is
higher than the switching frequency, it will calculate the droop amount according to the set
frequency, otherwise it will calculate the droop amount according to the switching frequency. It
will also calculate the droop amount according to the switching frequency when the current
speed is less than the switching speed even the droop function take effect.
d2-22
:
It’s the percentage value of the motor rated torque of the motor. There is no droop when
the motor output torque is less than the set value.
The droop control setting and the illustration:
Fig. 7-7 Schematic diagram of droop control
n
r
/f
Tem
Δ
n
2
=
Δ
n
3
d2-22
-d2-22
100%
-100%
n
1
0
d2-19*E0-00
100
Δ
n
2
n
2
Δ
n
3
=
Δ
n
3
n
3
d2-20*E0-00
100
d2-21
100
*
Δ
n
4
n
4
n
4
d2-21
100
*
Δ
n
4
=
d2-20*E0-00
100
Summary of Contents for SV800 Series
Page 8: ......
