Siemens Simovert Masterdrives Compendium page 927

06.2005
3. Max. speed under
load, max. load
torque, selection
of the gear unit
Siemens AG 6SE7087-6QX70 (Version AE)
SIMOVERT MASTERDRIVES
♦ Max. speed under load at the drive wheel
⋅
v 60
= max
n
Load max
π
⋅
D
A gear transmission ratio of i=10 is selected here. A synchronous
servomotor can thus be used with a rated speed of
3000 rpm.
= ⋅
n i n
Mot max Load max
♦ Resistance torque
D
= ⋅ ⋅ ⋅ =
M m g w
W f
2
♦ Acceleration and deceleration torque for the load
2
α = ⋅ =
a 6 4
load max
D
2
⎛ ⎞
D
= ⋅ ⎜ ⎟ =
J m 400
load ⎝ ⎠
2
= ⋅ α
M J
b v load , load load
♦ Max. torque on the output side of the gear unit
=
M ( M
load max b load
= + ⋅
( 179 2 27 47 . . )
0 9
An SPG140-M1 planetary gear unit for mounting on 1FT6 motors is
therefore used where
= 400
M Nm at i=10
max
* 2
= 0 001
J . kgm
G
η = 0 95
.
G
α = ' 3
G
♦ Acceleration and deceleration torque for the gear unit
*
= ⋅ α ⋅ =
M J
b v G , G load
Compendium Motion Control
⋅
16 60 .
= =
218 27 . rpm
π
⋅
0 14 .
= ⋅ =
10 218 27 . 2182 7
0 14 .
⋅ ⋅ ⋅ =
400 9 81 0 1 . . 27 47
2
2
−
2
⋅ =
. 914 . s
0 14 .
2
⎛ ⎞
0 14 .
⋅ ⎜ ⎟ =
196 . kgm
⎝ ⎠
2
= ⋅ =
196 914 179 2 . . .
1
+ ⋅
M )
W
η
mech
1
=
229 6 Nm .
.
moment of inertia referred to motor
gear unit efficiency
torsional play
⋅ ⋅ =
i 0 001 914 10 0 914 . . .
Engineering Information
. rpm
. Nm
2
Nm
Nm
11-27