Engineering Guide CDA3000
2-33
2 Drive definition
DE
EN
1
2
3
4
5
6
7
A
Typical acceleration behavior of standard three-phase AC
motors
(1) 1 pole pair
(2) 2 pole pairs
(3) 3 pole pairs
Figure 2.20
Acceleration behavior as a function of of number of pole pairs of
standard three-phase AC motor
Motors with one pole pair are unsuitable for dynamic drive tasks.
In summary: As the diagram shows, standard three-phase AC
motors with two pole pairs (four-pole) are particularly
well suited to dynamic drive tasks.
JM
Moment of inertia of the motor (rotor) in [kgm²]
tBE
Acceleration time in [s]
PMBE
Motor acceleration time in [W]
Acceleration from
0 rpm to nominal
speed in 100 ms
P
MBE
J
M
n
2
⋅
91 2
,
t
BE
⋅
----------------------
=
0
500
1000
1500
2000
W
250 W 370 W 550 W 750 W 1.1 kW 1.5 kW 2.2 kW
186
345
449
669
928
1350
1800
138
180
316
407
580
772
780
132
248
307
406
548
1100
1970
P
MBE
(1)
(2)
(3)
(1)
(2)
(3)