Lenze DSD - Manual (Page 108)

7 Applications
7.7 Wheel drive
108
Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
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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 " Basic calculations ". ( 68)
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 ⋅ ⋅ ⋅ ⋅ =