Lenze m850 Series Project Planning page 19

Operating modes S2, S3, and S6
Check and select servo motor/inverter combination
Output torque
Output speed (recommendation)
Max. output torque.
Max. output speed
All operating points (● )
below the maximum torque
characteristic of the servo motor/
inverter combination here, M
L,max
be considered
Thermally effective operating point (○ )
below the S1 torque characteristic of
the servo motor
4Rated data
^ 28
4Torque characteristics
^ 37
Speed profiles
Temporal load characteristic for the individual time segments z
Total time Individual time
segments
t Δt
z
s s
Load cycle duration
Calculation of the values required for the process
Torque per time segment
Maximum torque of the profile
Effective torque
Mean speed
Maximum load speed
Check
M ≥ M / ( k x k )
rated L L H
n ≥ n
rated L
M ≥ M
max L
n ≥ n
max L
must
n [r/min]
Load speed Load speed
variation
n Δ n
L,z L,z
rpm rpm
Calculation
= D
T å t
z
Calculation
2 p ´ D n
L,z
= +
M M J
z L,z L
60 ´ D t
z
M = max (M )
P,max z
1
2
= ´ D £
M å M t ,T 1min
eff z z
T
z
1
= = ´D
n |n | å |n | t
m L,z L,z z
T
z
n = max (n )
L,max L,z
Information on project planning
Selection
M
rated
n
rated
M
max
n
max
n
L
M
L
n
L
M / (k x k )
L L H
Steady-state Torque
load torque
M M
L,z z
Nm Nm
Symbol
T
Symbol
M
z
M
P,max
M
eff
n
m
n
L,max
Drive dimensioning
Unit
Nm
rpm
Nm
rpm
Acceleration Moment of
torque inertia
M J
s,z L
Nm
2
kgcm
Unit
s
Unit
Nm
Nm
Nm
rpm
rpm
19