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Comparison of Acceleration time<br />
(4-pole, nmax= 16,000 RPM)<br />
Basis of the comparison:<br />
-nmax = 16,000 RPM<br />
-identical frame size: 90 , lFE = 150 mm<br />
-identical power module S6-40%, current 90A<br />
P [kW]<br />
P [kW]<br />
30<br />
25<br />
20<br />
15<br />
10<br />
5<br />
0<br />
35<br />
30<br />
25<br />
20<br />
15<br />
10<br />
5<br />
0<br />
0 2000 4000 6000 8000 10000 12000 14000 16000<br />
n (RPM )<br />
0 2000 4000 6000 8000 10000 12000 14000 16000<br />
n (RPM)<br />
3<br />
2,5<br />
2<br />
1,5<br />
1<br />
0,5<br />
0<br />
th [sec]<br />
S Y N S 6-40%<br />
SYN S1<br />
ASM Pgrenz<br />
ASM S6-40%<br />
ASM S1<br />
PH2 P(I_S6-40%)<br />
FE1 P(I_S6-40%)<br />
PH2 th(I_S6-40%)<br />
FE1 th(I_S6-40%)<br />
Figure 21. ACCELERATION TIME OF SYNCHRONOUS AND ASYNCHRONOUS MOTORS<br />
Advantage at Synchronous motor <strong>spindle</strong><br />
200 %<br />
150 %<br />
100 %<br />
50 %<br />
Increased output<br />
(same active part<br />
volumes)<br />
Shorter acceleration<br />
time<br />
(same moment of inertia)<br />
Minimized rotor<br />
losses<br />
(same rated current)<br />
Induction Synchronous Induction Synchronous Induction Synchronous<br />
Figure 22. ADVANTAGE AT SYNCHRONOUS MOTOR SPINDLE<br />
75<br />
50<br />
- 20 -
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