30
1021387 12/2018
V02
4.1.1 Torque Based Dimensioning
Output Data
Time
n
1
n
2
t
2
T
2
t
3
n
p
t
p
t
1
T
1
n
1
n
3
t
1
T
1
Torque
Speed
T
3
Torques
T
1
... T
n
[Nm]
during the load phases
t
1
... t
n
[s]
during the pause time
t
p
[s]
and output speeds
n
1
... n
n
[rpm]
Emergency stop/momentary peak torque
T
k
[Nm]
at output speed
n
k
[rpm]
and duration
t
k
[s]
Equation 30.2
Illustration 30.1
Permissible maximum input speed
n
in max
= n
out max
· i ≤ Maximum input speed (see rating table)
Load limit 2,
T
R
T
max
≤ T
R
Operating life
L
50
= L
n
· Rated input speed ·
(
Rated torque T
N
)
3
n
in
av
T
av
n
out av
=
|n
1
| · t
1
+ |n
2
|
· t
2
+ ... + |n
n
|
· t
n
t
1
+ t
2
+ ... + t
n
+ t
p
Equation 30.4
Equation 30.6
Equation 30.8
Equation 30.11
Equation 30.9
Equation 30.10
Equation 30.5
Equation 30.7
Selection of a bigger size
No
Equation 30.3
Load limit 3,
T
M
T
k
≤ T
M
Allowable number of momentary peak torques
N
k max
= 10
4
2 · n
k
· i · t
k
60
Permissible average input speed
n
in av
≤ Limit for average input speed
(see rating table)
Values for T
A
see rating tables
T
av
≤ T
A
Calculation of the average output speed
Load limit 1,
Calculation of the average output torque T
av
3
|n
1
· T
1
3
| · t
1
+ |n
2
· T
2
3
| · t
2
+ ... + |n
n
· T
n
3
|
· t
n
|n
1
| · t
1
+ |n
2
|
·
t
2
+ ... + |n
n
|
· t
n
T
av
=
Average input speed
n
in av
= i · n
out av
< 10
4
Values for L
n
see table 32.1
Time
