Lenze DSD - Manual (Page 407)

Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
407
16 Auxiliary means
16.1 Auxiliary means integrated in the DSD
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16.1.1.3 Inertial calculator

How to call the calculator:
• Via the ToolsInertial calculator... command
• Via the
icon in the toolbar or in the input area.
By means of the inertial calculator, the inertia of complex geometric fields can be calculated:
[16-1] Example for the calculation of a the total inertia of a belt transmission
• Fields can contain hollow spaces , which in the inertial calculator are entered as fields with a
negative inertia.
• If a mass is not rotated around the axis defined in the inertial calculator – as shown with regard
to the hollow spaces  –, but is shifted by a distance from the centre, the "parallel-axis theo-
rem" can be used.
• Fields (e. g. belt pulley with bore ), rotating with a different reference speed than that of the
drive speed of the motor , however, featuring the same circumferential speed, can be appor-
tioned to the motor side by means of the inertial calculator, selecting "v=const".
r
1
= distance for the parallel-axis theorem
d
1
= datum diameter for v = const
d
2
= diameter of the field
M d
1
v = const
J'
J
d
2

Ž
Œ
r
1