Lenze DSD User Manual Page 130

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7Applications
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
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