Flux Braking - ABB ACS355 User Manual

138 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.
Motor speed
Flux braking
Braking torque (%)
100
80
60
2
40
3
20
0
0 5
Braking torque (%)
100
80
60
40
2
3
20
0
0 5
No Flux braking
t (s)
Flux braking
1
10 15 20
No Flux braking
1
10 15 20
T
Br
(%)
T
N
T = Braking torque
Br
T = 100 N·m
N
60
Flux braking
40
20
No Flux braking
25 30 35 40
25 30 35 40
f (Hz)
50 Hz / 60 Hz
Rated
motor power
7.5 kW
1
2.2 kW
2
0.37 kW
3
f (Hz)
45
f (Hz)
45