shop & field services · new buss rings . all field coils and pole pieces removed . insulation...

SHOP & FIELD SERVICES

Isotropic insulation

Isotropic insulation

New Buss Rings

All field coils and pole pieces removed

Insulation cured and tight for added heat sink

Reinsulated turn to turn before assembly to

pole piece

Precision V-blocks

Hannon fabricated drive unit

Induction heaters for thermal expansion

Fabricated manifold to apply liquid nitrogen to shaft

Added risers supports for extra stability

Rotor and stator floated together on sight to save

shipping cost

Isotropic insulation installed to assure mechanical and electrical

strength

Hannon designed risers

Field coils

Cage winding

Shorting ring

Altered shaft

Fabricated base

Damaged insulation

Shorted bars

New frame fabricated and stressed relieved

New laser cut laminations

Weld , machine and new key to correct loose fit

Lifting device designed, engineered and tested on site

Rigging and lifting devices supplied by Hannon service vehicles

Cracked rotor bars

90

95

100

105

110

115

120

125

130

135

140

145

150

155

160

°F

S02 S03 S04

S05S06

S07

S01

Series1

Eccentricity frequency determined by # of

rotor bars times speed.

Searches for 1st and 3rd sidebands of

eccentricity frequency.

20db above noise level is cause for

concern.