Speed Control Performance Figures - ABB ACS560 Firmware Manual

Notes:
• Actual motor shaft speed is not needed for motor control.
• Vector control also requires measurement of the DC voltage and two motor phase
currents.
The difference of vector control from the traditional control are:
- Torque control operates at the same time level as the power switch control.
- There is no separate voltage and frequency controlled PWM modulator.
- The output stage switching is based on the electromagnetic state of the motor.
- The best motor control accuracy is achieved by activating a separate motor.
identification run (normal ID run).
See also section Speed compensated stop
Settings
Motor data
• Main menu
parameter 99.04.
• Parameter 99.13 ID run requested


Speed control performance figures

The table below shows typical performance figures for speed control.
Speed control
Static accuracy
Dynamic accuracy
Tuned speed
controller
or Main menu
(page 368).
Performance
20% of motor nominal
slip
< 10% s with 100%
torque step (with default
speed controller tuning)
< 2% s with 100%
torque step
(page 76).
 Complete parameter list
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
Program features 67
T
load
t (s)
Area < 10% s