Lenze DSD - Manual (Page 130)

7 Applications
7.9 Hoist drive with counterweight
130
Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
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7.9.2.6 Additional moment of inertia
7.9.2.7 Cable diameter
7.9.2.8 Cable mass
7.9.2.9 Active cable mass
7.9.2.10 Shaft efficiency
7.9.2.11 Efficiency of the rolls
7.9.2.12 Efficiency of the driving pulley
Symbol Description
J
add
Moment of inertia of the driving pulley, the guide pulleys and guide rollers, etc.
• The moment of inertia of the hoisting cage does not have to be taken into consideration here
since it is already included.
• The moment of inertia has an effect on the dynamic torque!
• Value can be entered directly or calculated using the inertial calculator.
Inertial calculator ( 407)
Symbol Description
d
Rop
Outside diameter of cable
Symbol Description
m
Rop
Mass of cable
• Value can be entered directly or calculated using the auxiliary calculator.
"Mass of rope/cable (hoist drive)" calculator ( 414)
Symbol Description
m
acv,Rop
Active mass of cable
• Is the mass that is relevant for the stationary moment, i.e. the mass that acts as a weight on
the cable drum.
• Value can be entered directly or calculated using the auxiliary calculator.
"Mass of rope/cable (hoist drive)" calculator ( 414)
Symbol Description
η
Gdn
Efficiency resulting from the friction of the hoisting cage at the hoisting shaft
Symbol Description
η
Pll
Efficiency resulting from friction between cable pulleys and cable
Symbol Description
η
Cor
Efficiency limited by friction between traction sheave and cable