Engineering Guide CDA3000
2-33
2 Drive definition
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EN
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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)
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