7applications – Lenze DSD User Manual
Page 108
7
Applications
7.7
Wheel drive
108
Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Alternatively the travelling resistance F’ can be related to the mass [N/t]:
[7-70] Equation 8: Travelling resistance
[7-71] Equation 9: Friction torque
Torque of the application
[7-72] Equation 10: Torque of the application
Spinning
In order to prevent the drive wheels from spinning, a maximum permissible acceleration can be de-
termined. In the calculation the wheel load, the angle of tilt, the total mass, and the friction coeffi-
cient and a possible counterforce (F
vs
) are taken into consideration.
[7-73] Equation 11: Permissible spinning acceleration
Driving against a limit stop
The maximum torque during driving against a limit stop depends on the friction force and the di-
ameter of the driving wheels. After the friction force has been overcome, the torque is reduced by
spinning wheels.
[7-74] Equation 12: Torque at the gearbox output during driving against a limit stop
Tip!
Further equations to complete the calculations required for an application can be found in
the chapter "
".
F’
g 2 f
β
cos
⋅ ⋅
d
Whl
---------------------------
d
Brg
μ
Brg
⋅
d
Whl
--------------------------
c
+
+
1000
⋅
⋅
=
M
""
F
""
d
Whl
2000
-------------
⋅
F’ m
sum
⋅
1000
-----------------------
d
Whl
2000
------------- v
v
-----
⋅
⋅
=
=
M
App
M
sds
J
sum
α
⋅
+
=
a
per
g μ
0
m
Whl
m
sum
--------------
β
cos
β
sin
–
⋅
⋅
F
vs
m
sum
--------------
+
⋅
=
M
μ0
m
sum
g μ
0
d
Whl
2000
-------------
β
cos
⋅
⋅
⋅ ⋅
=