Siemens Simovert Masterdrives Compendium page 939

06.2005
Lifting
M
16.58 Nm
Mot
11.47 Nm
0.6 s 0.3 s 0.6 s
=
Siemens AG 6SE7087-6QX70 (Version AE)
SIMOVERT MASTERDRIVES
6.37 Nm
7 s
Fig. 11-20 Torque characteristic for lifting and lowering
♦ The effective motor torque is obtained from the torque characteristic
as follows:
∑
2
⋅
M
Mot i
=
M
eff
T
2 2
⋅ + ⋅
16 58 . 0 6 1147 . . 0 3 6 37
= 7 14
. Nm
♦ The speed-proportional travel curve is used to obtain the mean
motor speed as follows:
+
n n
∑ A E
2
=
n
mean
T
2865
⋅ +
( 0 6 2865 0 3 .
2
=
(due to the symmetry of the travel curve, the component for lifting is
multiplied by 2)
Compendium Motion Control
Lowering
8.39 Nm
4.08 Nm
0.6 s 0.3 s
∆
t
i
2 2
+ ⋅ +
. . 0 6 4 08 . .
7
⋅ ∆
t
i
2865
⋅ + ⋅ ⋅
. 0 6) 2 .
2
=
7
Engineering Information
12.7 Nm
0.6 s
2 2
⋅ + ⋅ +
0 6 8 39 . . 0 3 12 7 . .
736 7 rpm .
t
⋅
0 6 .
11-39