Lenze MSEMA Series - Dimensioning

Dimensioning
Necessar
y input variables
Mains operaon
Max. load torque M
L
,max
Nm
Max. load speed n
L,max
rpm
External moments of inera J
ext
kgcm
2
Operang me / day BD h
Switching operaons per hour S
h
1/h
Determine correcon factor
Site altude Amsl H m ≤ 1000 ≤ 2000 ≤ 3000 ≤ 4000
Correcon factor k
H
1 0.95 0.9 0.85
Determine product on the basis of the forces
Transmission element Gear wheels Sprockets Toothed belt pulleys Narrow V-belt
( depending on the pre-
loading)
( depending on the
pr
eloading)
Addional radial force factor
f
z
≥ 17 teeth = 1.0 ≥ 20 teeth = 1.0 With belt ghtener= 2.0 -
2.5
1.5 - 2.0
< 17 teeth = 1.15 < 20 teeth = 1.25 Without belt ghtener= 2.5
- 3.0
< 13 teeth = 1.4
Calculaon Check
Radial force
F
rad
N
´
= ´
L,max z
rad
M f
F 2000
dw
F
r
ad
≤ f
w
x F
rad,max
Axial force
F
ax
N
F
ax
≤ F
rad,max
x 0.5
dw Eecve diameter of transmission element
4Radial f
orces and axial forces ^ 26
Calculate output torque
Calculaon
Necessary output torque
M
2
N
m
³
L,max
2
H
M
M
k
Calculate intensity
Calculaon
Intensity
F
I
+ + +
= £
+ +
L
M B Z
2
I
M B Z
J
J J J
i
F 1.25
J J J
i Rao of gearbox J
B
Moment of
inera of brake
J
L
Moment of inera of the load J
Z
Addional moment of inera (handwheel, 2nd sha end ...)
J
M
Moment of inera of motor
Determine the product on the basis of the data obtained from the selecon tables
Selecon table Check
Output speed n
2
rpm n
L
,max
≈ n
2
Output torque M
2
Nm M
L,max
≤ M
2
Selecon tables ^ 29
Project planning
Pr
oject planning process
Dimensioning
19