Technical Reference Note (APC08)
Young’s Stability Curves
PHASE MARGIN
10
1
0.1
0.01
3
.
1 10
4
.
1 10
3
4
5
6
.
.
.
.
1 10
100
1 10
1 10
1 10
________0°
_______15°
_______30°
_______45°
_______60°
_______75°
_______90°
50
0
50
100
150
3
4
5
6
.
.
.
.
1 10
100
1 10
1 10
Frequency
1 10
Figure 44. YSC - Phase Margin response to determine system stability at other load conditions.
MODEL: APC08 SERIES
OCTOBER 4, 2004 - REVISION 03
SHEET 19 OF 23