Siemens Simovert Masterdrives Compendium page 937

06.2005
4. Selection of
motor
Siemens AG 6SE7087-6QX70 (Version AE)
SIMOVERT MASTERDRIVES
Selection in relation to the dynamic limit curve
♦ The max. motor torque here occurs during acceleration upwards
since the deceleration is equal to the acceleration and the drive,
during lifting, also has to overcome the levels of efficiency.
=
M M
Mot max b Mot
= + +
M 0 5 . ( 25 98 1
b Mot
= ⋅
with M J
b Mot Mot
The first 1FT6 motor with n
or matches the dynamic limit curve, is the 1FT6082-8AF7 with
P =3.2 kW, M =10.3 Nm, M
n n
(with brake), k
Tn100
♦ The acceleration and deceleration torque for the motor rotor is thus
=
M 0 00335 500 168 .
b v Mot ,
♦ The max. motor torque is equal to the motor torque during
acceleration:
=
M M
Mot max Mot b up
M/Nm
45
40
35
30
25
20
M
Mot max
15
10
5
0
500
Fig. 11-19 Fig. 11-19
of the load cycle
In order to check the thermal limits, the effective motor torque is
calculated. For this purpose, all other motor torques within the travel
curve have to be calculated, in addition to the motor torque during
acceleration.
Compendium Motion Control
+ + +
M ( M M
b Load
b G
1
+ ⋅ =
. )
⋅ ⋅
10 0 9 0 95 . .
α ⋅ = ⋅ ⋅
i J 50 10
Load Mot
=3000 rpm, which satisfies the condition
n
=42 Nm, J
max perm
=1.18 Nm/A, η
=0.89, M
Mot
⋅ =
. Nm
= + =
168 14 9 16 58 . . . Nm
1000 1500
Dynamic limit curve for the 1FT6082-8AF7 with the points
Engineering Information
1
⋅
)
H
⋅ η ⋅ η
i
mech G
+
M 14 9 . Nm
b Mot
−
2
= ⋅
J 500 s
Mot
=0.00335 kgm
Mot
=13 Nm
0
n
2000 2500
Mot max
11-37
2
3000
-1
n/min