Effect of Stator Winding Temperature on Modal Test Results IRMC ...

Frequency Response H1(4524 B-xyz.x,8207 Ref.) - STS Measurement 1 (Bode Cursor Plot - values Phase/Magnitude) \ STS FFT An
Frequency Response H1(4524 B-xyz.y,8207 Ref.) - STS Measurement 1 (Bode X: 150.000 Plot - Phase/Magnitude) Hz
\ STS FFT An
Frequency Response H1(4524 B-xyz.z,8207 Ref.) - STS Measurement 1 (Bode Y(Mg):0.119 Plot - Phase/Magnitude) (m/s^2)/N \ STS FFT An
[(m/s^2)/N]
Y(Mg):36.653m (m/s^2)/N
Y(Mg):9.463m (m/s^2)/N
100
y(Ph):82.289 degrees
0.14
20
y(Ph):94.672 degrees
y(Ph):-55.355 degrees
Markers
0.1
Marker1: 111Hz,0.14(m/s^2)/N
60m
Marker2: 125.5Hz,0.109(m/s^2)/N
Marker3: 150Hz,0.119(m/s^2)/N
20m
Marker4: 185Hz,38.885m(m/s^2)/N
0 20 40 60 80 100 120 140 160 180 200
[Hz]
Figure 6 - NCE Point 1 FRF Cold at 58°C
Frequency Response H1(4524 B-xyz.x,8207 Ref.) - STS Measurement 1 (Bode Cursor Plot - values Phase/Magnitude) \ STS FFT An
Frequency Response H1(4524 B-xyz.y,8207 Ref.) - STS Measurement 1 (Bode X: 174.000 Plot - Phase/Magnitude) Hz
\ STS FFT An
Frequency Response H1(4524 B-xyz.z,8207 Ref.) - STS Measurement 1 (Bode Y(Mg):41.494m Plot - Phase/Magnitude) (m/s^2)/N \ STS FFT An
[(m/s^2)/N]
Y(Mg):18.631m (m/s^2)/N
Y(Mg):12.140m (m/s^2)/N
100
y(Ph):127.302 degrees
0.14
20
y(Ph):120.175 degrees
y(Ph):-153.692 degrees
Markers
0.1
Marker1: 99Hz,0.097(m/s^2)/N
60m
Marker2: 112.5Hz,61.41m(m/s^2)/N
Marker3: 139.5Hz,62.874m(m/s^2)/N
20m
Marker4: 174Hz,41.494m(m/s^2)/N
0 20 40 60 80 100 120 140 160 180 200
[Hz]
Figure 7 - NCE Point 1 FRF Hot at 90°C
Mode shape tables were produced from the end winding data. The mode shape can be identified by
comparing the animation to the known ring mode shapes. The shape tables generated show how the
endwinding dynamics change with temperature. Although only 2 mode shapes are the critical ones
(n=2 and n=4) analysis <strong>of</strong> temperature effect on mode shape frequency was performed for other modes
as well, see Tables 1 and 2.