Average Motoring Power P; Mot,Ave; Peak Motoring Power P; Average Regenerative Power P Mot,Max - ABB ACSM1 System Manual

Based on the system power profile, the following system level DC link power
values are defined.

Average motoring power P

P is the average of the motoring DC link power over the whole cycle.

mot,ave

This power is taken from the AC supply. For long load cycles P
be determined over the worst-case 3 minutes time window.

Peak motoring power P

P is the positive peak power in the power profile. This value can have a
mot,max
major 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 is the average of the regenerating DC link power over the whole

gen,ave

cycle. This power must be dissipated in braking resistor(s) or fed back to the
AC supply. P
gen,ave
time window, if the internal braking chopper of the ACSM1 is used.
Peak regenerative power P
P is the negative peak power in the power profile. This value has a

gen,max

major impact on the number of active braking choppers needed.
The power values defined above are shown in the following diagram.
P
mot,ave
P
mot,max
~
=
Braking
resistor(s)
R
2
R
3
mot,ave
mot,max
gen,ave
should be determined over the worst-case 30 seconds
gen,max
P
gen,ave
P
gen,max
mot,ave
Pdc
=
1
~
Pdc
=
2
~
Pdc
3 =
~
Pdc
n
=
~
13
should
M
1
M
2
M
3
M
n