ABB ACS355 - Diagnostics; Speed Control Performance Figures; Torque Control Performance Figures

Program features 143
 Diagnostics
Actual signal 0102 SPEED
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 < 1% s
T
N
= rated motor torque
n
N
= rated motor speed
n
act
= actual speed
Speed
control
No pulse
encoder
With pulse
encoder
Static
accuracy
20% of motor
nominal slip
2% of motor
nominal slip
Dynamic
accuracy
< 1% s with
100% torque
step
< 1% s with
100% torque
step
t (s)
T
N
= rated motor torque
T
ref
= torque reference
Torque
control
No pulse
encoder
With pulse
encoder
Non-linearity ± 5% with
nominal
torque
(± 20% at the
most
demanding
operating
point)
± 5% with
nominal
torque
Torque step
rise time
< 10 ms with
nominal
torque
< 10 ms with
nominal
torque
100
< 5 ms
90
10
T
ref
T
act
T
T
N
(%)