Lenze DSD - Manual (Page 127)

Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
127
7 Applications
7.9 Hoist drive with counterweight
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7.9.1.1 Symbols used
7.9.2 Data for the entry
7.9.2.1 Diameter of traction sheave
7.9.2.2 Reeving, load
Symbol Description Dimension unit
d Effective diameter of driving pulley mm
d
Cor
Diameter of traction sheave mm
d
Rop
Cable diameter mm
F
add
Additional force N
g Gravitational acceleration (g = 9.81 m/s 2 ) m/s 2
Δh Height difference for the determination of the stationary torque m
J
add
Additional moment of inertia kgm 2
J Stationary moment of inertia without payload mass kgm 2
J
sum
Total moment of inertia with payload mass kgm 2
N
L
Reeving of the pulley block with regard to the payload
N
Ctw
Reeving of the pulley block with regard to the counterweight
l
Rop
Cable length m
m
L
Mass of the payload kg
m
Ctw
Mass of counterweight 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
App
Required torque of the application Nm
M
sds
Stationary torque Nm
M
th
Torque loss Nm
n Speed of the driving pulley rpm
v Speed of the payload/hoisting cage m/min
v
Ctw
Speed of the counterweight m/min
α Angular acceleration of the driving pulley rad/s 2
η
Gdn
Shaft efficiency
η
Pll
Efficiency of the cable rolls
η
Cor
Efficiency of the driving pulley
ρ
Rop
Specific cable weight kg/dm 3
Symbol Description
d
Cor
Diameter of traction sheave
Symbol Description
N
L
The reeving of the cable to the payload.
• The reeving is the ratio of the cable velocity of the winding drum to the lifting speed of the
payload.