Siemens SIMOVERT MASTERDRIVES Manual page 899

Engineering Information
P
Lifting
Mot
4.97 kW
3.44 kW
1.91 kW
0.6 s 0.3 s
-1.22 kW
-2.52 kW
-3.81 kW
11-42
0.6 s
Negative area corresponds to regenerative
operation
7 s
Fig. 11-22 Curve of motor power output for lifting and lowering
♦ The maximum DC link current during motor operation during
acceleration upwards is as follows:
=
I
Link Inv max
η
Mot
4970
=
⋅ ⋅ ⋅
0 89 0 98 135 400 . . .
♦ The mean power output of the motor during motor operation is
calculated from the positive characteristic of the motor power output
as follows:
P
Mot A
∑
=
P
Mot mean
1
⋅ ⋅ +
4 97 0 6 3 44 0 3 . . .
2
=
♦ The mean DC link current is therefore:
P
=
I
Link mean
η ⋅ η
Mot
442
=
⋅ ⋅ ⋅
0 89 0 98 135 400 . . .
Lowering
0.6 s 0.3 s
P
Mot max
⋅ η ⋅ ⋅
135 . U
Inv Line
=
10 55 . A
+
P
Mot E
⋅ ∆
t
i
2
T
1
⋅ + ⋅ ⋅
. 191 0 6 . .
2
=
0 442 .
7
Mot mean
⋅ ⋅
135 . U
Inv Line
=
0 938 . A
6SE7087-6QX70 (Version AE)
Compendium Motion Control
06.2005
0.6 s
t
kW
Siemens AG
SIMOVERT MASTERDRIVES