Lenze DSD - Manual (Page 335)

Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
335
11 Drive Dimensioning
11.4 Lenze gearbox selection
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Alternating load or pulsating load?
According to the intensity of the periodically occurring alternating load, the alternating load
factor k
alt
is in the range of 1 ... 1.4.
• In the case of a symmetrical alternating load M
alt,out
= M
max,out
, the alternating load
factor k
alt
is 1.4.
• An alternating load without sign reversal (no torque reversal) is a pulsating load. The alternat-
ing load factor for pulsating loads is k
alt
= 1.
[11-12] Different torque characteristics at the output end of the gearbox
• Pulsating load
• The torque alternates between two values without sign re-
versal
• Alternating load factor k
alt
= 1
• Pulsating load
• The torque changes from 0 to the max. value without sign
reversal
• Alternating load factor k
alt
= 1
• Alternating load
• Torque reversal with sign reversal
• Alternating load factor k
alt
> 1 (here approx. 1.13)
M out
t
M max,out
M alt,out
t
M
out
M max,out
t
M out
M max,out
M alt,out