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1FT6 AC Servomotors
1.2 Functions and options
1.2
Armature short–
circuit braking
1FT6
1FT6/1-8
Functions and options
Definition, refer to Chapter 3, General information on AC servmotors AL S .
Brake resistors
An optimum braking time is achieved by appropriately dimensioning the brake
resistors. The braking torques which are obtained, are also listed in the tables.
This data is valid for braking from rated speed. If the drive brakes from another
speed, then the braking time cannot be linearly interpolated. However, the
braking times either remain the same or are shorter.
The resistor ratings must be adapted to the particular I
Chapter 3, General information on AC servomotors AL S.
Table 1-5
Motor type
1FT6021–6AK71
1FT6024–6AK71
1FT6031–VAK71
1FT6034–VAK71
1FT6041–VAF71
1FT6041–VAK71
1FT6044–VAF71
1FT6044–VAK71
Resistor braking for 1FT6 motors, shaft heights 28, 36 and 48
Ext. brake
Avg. braking
resistor
torque
R
M
opt
br rms
[Ω]
[Nm]
–
–
–
4.3
–
3.7
–
0.3
–
2.6
–
12.5
2.0
13.4
–
1.8
13.5
Siemens AG 2000 All rights reserved
SIMODRIVE Planning Guide Motors (PJM) – 11.00 Edition
2
t load capability, refer to
Max. braking
RMS
torque
braking cur-
M
rent
br max
[Nm]
I
br rms
1.2
1.7
3.0
4.0
2.1
2.8
2.3
3.8
5.7
13.5
4.6
12.3
6.7
8.4
10.2
6.8
10.1
5.8
8.3
18.1
6.7
16.6
16.6
17.8
16.6
9.7
16.8
37.0
33.0
6SN1197–0AA20
09.00
[A]
6.9
8.8
6.9
6.4
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