Speed Control Performance Figures; Torque Control Performance Figures - ABB ACS350 User Manual

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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
Program features
No pulse With pulse
encoder encoder
20% of motor 2% of motor
nominal slip nominal slip
< 1% s with 100% < 1% s with 100%
torque step torque step
No pulse With pulse
encoder encoder
± 5% with nominal ± 5% with nominal
torque torque
(± 20% at the
most demanding
operating point)
< 10 ms with < 10 ms with
nominal torque nominal torque
T
(%)
T
N
T
load
100
Area < 1% s
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
N
T
ref
100
T
act
90
10
< 5 ms
T = rated motor torque
N
T = torque reference
ref
T = actual torque
act
t (s)
t(s)