Siemens simovert masterdrives

06.2005 Engineering Information
Siemens AG 6SE7087-6QX70 (Version AE)
SIMOVERT MASTERDRIVES Compendium Motion Control 11-39
M
Mot
16.58 Nm
11.47 Nm
6.37 Nm
4.08 Nm
8.39 Nm
12.7 Nm
0.6 s 0.3 s 0.6 s
0.6 s 0.3 s 0.6 s
7 s
Lifting Lowering
t
Fig. 11-20 Torque characteristic for lifting and lowering
♦ The effective motor torque is obtained from the torque characteristic
as follows:
M
eff
=
⋅
∑
Mt
T
Mot i i
2
∆
=
⋅+ ⋅+ ⋅+ ⋅+ ⋅+ ⋅16 58 0 6 1147 0 3 6 37 06 4 08 06 8 39 0 3 12 7 0 6
7
222222
............
= 714.Nm
♦ The speed-proportional travel curve is used to obtain the mean
motor speed as follows:
n
nn
t
T
mean
AE
i
=
+
⋅
∑
2
∆
=
⋅+ ⋅+ ⋅ ⋅
=
(. . .
.
2865
2
0 6 2865 0 3
2865
2
06) 2
7
736 7 rpm
(due to the symmetry of the travel curve, the component for lifting is
multiplied by 2)