6. Control Functions and Parameter Settings
6-14
Block-B parameters (Extended function constants) list
Application
No.
Parameter
Unit
Default
Min.
Max.
Function
ST
V/f VEC PM
B31 – Sensor-less control function
0
Flux observer gain
1.20
0.50
2.00
This is the gain for flux observer
feedback.
If in the high-speed operation
range, occurs hunting at the
estimated speed, adjust within
the range of 1.2 to 0.9.
1
Speed estimated proportional
gain
%
0.0
0.0
100.0
This is the proportional gain for
the adaptive speed estimation
algorithm. To increase the
speed estimation response, set
a large value. Note that if the
value is too high, the speed
estimation value will hunt.
2
Speed estimated integral
gain
%
50.0
0.0
100.0
This is the integral gain for the
adaptive speed estimation
algorithm. To increase the
speed estimation response, set
a large value. Note that if the
value is too high, the speed
estimation value will hunt.
3
Regenerative compensation
torque limit 1
%
10.0
0.1
100.0
4
Regenerative compensation
torque limit 2
%
20.0
0.1
100.0
5
Regenerative compensation
low-speed area setting 1
%
10.0
0.1
100.0
6
Regenerative compensation
low-speed area setting 2
%
20.0
0.1
100.0
The regenerative torque limit
can be changed in the low
speed area. The shaded area
shows the operating range.
If the operation is unstable at a
point, set the compensation
limits to keep the unstable
region out the shaded area
O
u
tp
u
t to
rq
u
e
R e ge ne ratio n
B 3 1-3
B 3 1-5
B 3 1-4
B 3 1-6
M otor sp ee d
R e ge ne rative
to rqu e lim it
Regenerative compensation
(B31-3, 4, 5, 6)
