Speed Control Performance Figures; Torque Control Performance Figures - ABB ACS580 Firmware Manual

102 Program features


Speed control performance figures

The table below shows typical performance figures for speed control.
Speed control
Static accuracy
Dynamic accuracy


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.
Torque control
Non-linearity
Torque step rise time < 10 ms with nominal
Performance
20% of motor
nominal slip
< 10% s with 100%
torque step
Performance
± 5% with nominal
torque
(± 20% at the most
demanding operating
point)
torque
T
(%)
T
N
100
n -n
act ref
n
N
T = rated motor torque
N
n = rated motor speed
N
n = actual speed
act
n = speed reference
ref
T
(%)
T
T
N
ref
100
T
90
10
< 5 ms
T = rated motor torque
N
T = torque reference
ref
T = actual torque
act
T
load
t (s)
Area < 10% s
act
t (s)