ABB ACS280, Firmware Manual, Page: 47 / 430

Program features 47

Speed control performance figures
The table below shows typical performance figures for speed control.

Torque control performance figures
The drive can perform precise torque control without any speed feedback from
the motor shaft. The table below shows typical performance figures for torque
control.
100
t
(s)
T
T
N
(%)
T
load
n
act
-n
ref
n
N
Area < 10% s
T
N
= rated motor torque
n
N
= rated motor speed
n
act
= actual speed
n
ref
= speed reference
Speed control Performance
Static accuracy 20% of motor
nominal slip
Dynamic accuracy < 1% s with 100%
torque step
t
(s)
T
N
= rated motor torque
T
ref
= torque reference
T
act
= actual torque
Torque control Performance
Non-linearity ± 5% with nominal
torque
(± 20% at the most
demanding
operating point)
Torque step rise
time
< 10 ms with
nominal torque
100
< 5 ms
90
10
T
ref
T
act
T
T
N
(%)