Peak Motoring Power P Mot,Max; Mot,Ave; Average Regenerative Power P; Peak Regenerative Power P - ABB ACS850 Application Manual

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Average motoring power P
P

mot,ave

is taken from the AC supply. For long load cycles, P
the worst-case 3 minutes time window.
Peak motoring power P
P
mot,max
impact on the selection of the drive module(s) connected to the AC supply if many axes
are accelerated simultaneously.

Average regenerative power P

P

gen,ave

power must be dissipated in the braking resistor(s) or fed back to the AC supply.
P
gen,ave
internal braking chopper of the drive is used.

Peak regenerative power P

P

gen,max

on the number of active braking choppers needed.
The power values defined above are shown in the following diagram.
Common DC configurations
mot,ave
is the average of the motoring DC link power over the whole cycle. This power
mot,max
is the positive peak power in the power profile. This value can have a major
gen,ave
is the average of the regenerating DC link power over the whole cycle. This
should be determined over the worst-case 30 seconds time window if the
gen,max
is the negative peak power in the power profile. This value has a major impact
P
mot,ave
P
mot,max
~
=
Braking
P
gen,ave
resistor(s)
P
gen,max
R
2
R
3
should be determined over
mot,ave
Pdc =
1
~
Pdc
=
2
~
Pdc
3 =
~
Pdc
=
n
~
M
1
M
2
M
3
M
n