Lenze DSD Bedienungsanleitung Seite 184

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Seitenansicht 183
7Applications
7.21 Dimension the multi-axis system
184
Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23
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Energy exchange between two drives
[7-179] Energy exchange between two drives
Other drive axes in the multi-axis system must be able to absorb recovered energy.
In case of a quick stop for all drive axes, a brake chopper is usually required in addition since no
drive axis is able to absorb the regenerative power.
Buffering braking energy
[7-180] Energy storage in the capacitor
The braking energy is stored in a capacitor in order to make it available again in the next accel-
eration or lifting process.
Compared to a regenerative power supply module, the costs are lower, but the storage capacity
of the capacitor is limited.
Energy storage is cost-effective for fast cycled drives (e.g. cross cutters).
P
th,I
Power loss in inverter
P
th,M
Power loss in motor
P
gen,mec
Mechanically generated power by braking processes
P
mot,mec
Mechanically available power
=
~
~
=
=
~
P
gen,mec
P
th,M
P
th,I1
3AC
M
3~
P
th,I2
P
th,M
P
mot,mec
M
3~
P
th,I
Power loss in inverter
P
th,M
Power loss in motor
P
gen,mec
Mechanically generated power by braking processes
~
=
=
~
P
gen,mec
P
th,M
P
th,I
3AC
M
3~
Seitenansicht 183
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