ABB ACS355 series, User Manual

Page: 140 / 436

140 Program features
Flux braking
The drive can provide greater deceleration by raising the level of magnetization in the
motor. By increasing the motor flux, the energy generated by the motor during
braking can be converted to motor thermal energy.
t (s)
f (Hz)
T
Br
T
N
20
40
60
(%)
50 Hz / 60 Hz
Flux braking
No Flux braking
T
Br
= Braking torque
T
N
= 100 N·m
Flux braking
No Flux braking
Motor speed
20
f (Hz)
40
60
80
100
0
20
40
60
80
100
0
0 5 10 15 20 25 30 35 40 45
1
2
3
0 5 10 15 20 25 30 35 40 45
1
2
3
f (Hz)
1
2
3
7.5 kW
2.2 kW
0.37 kW
Rated
motor power
Braking torque (%)
Braking torque (%)
No Flux braking
Flux braking