1 symbols used, 7applications – Lenze DSD User Manual
Page 118
7
Applications
7.8
Hoist drive without counterweight
118
Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
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Required speed
For the determination of the required speed (n) of the cable drum apart from the previously men-
tioned parameters the required lifting speed (v) has to be specified:
[7-91] Equation 15: Speed of the cable drum
Tip!
Further equations to complete the calculations required for an application can be found in
the chapter "
".
7.8.1.1
Symbols used
n
60
2 π
⋅
----------- v
60
------
N
L
2000
⋅
d
Min
------------------------
⋅
⋅
=
Symbol
Description
Dimension unit
b
Cor
Width of cable drum
mm
d
Cor
Diameter of cable drum
mm
d
max
Maximum effective diameter of cable drum
mm
d
min
Minimum effective diameter of cable drum
mm
d
Rop
Cable diameter
mm
g
Gravitational acceleration (g = 9.81 m/s
2
)
m/s
2
h
hoi
Lifting height for the determination of the winding layers
m
Δh
Height difference for the determination of the stationary torque
m
h
N
Achievable height for winding layer N
m
J
add
Additional moment of inertia (e. g. by the cable drum)
kgm
2
J
Stationary moment of inertia without payload mass
kgm
2
J
sum
Total moment of inertia with payload mass
kgm
2
N
Cor
Number of winding layers on the cable drum
N
L
Reeving of the pulley block with regard to the payload
l
Rop
Cable length
m
m
L
Mass of the payload
kg
m
Cbn
Mass of the hoisting cage for the payload
kg
m
Rop
Cable mass
kg
m
acv,Rop
Active cable mass (for stationary torque)
kg
m
sum
Total mass
kg
M
App
Required torque of the application
Nm
M
sds
Stationary torque
Nm
M
th
Torque loss
Nm
n
Speed of the cable drum
rpm
v
Lifting speed of the payload
m/min
α
Angular acceleration
rad/s
2
η
Gdn
Shaft efficiency
η
Pll
Efficiency of the cable rolls
η
Cor
Efficiency of the cable drum
ρ
Rop
Specific cable weight
kg/dm
3