Brochure

Rotor Construction
The magnetic circuit consists of punched thin steel disks
assembled to form a laminated core mounted on the shaft. The
laminations are coated with a temperature stable insulating
film to reduce magnetic losses yet maintain dimensional
stability in the face of severe thermal and mechanical stresses.
The rotor winding consists of a number of uninsulated metal
bars in the outer surface of the magnetic core parallel to the
shaft and short circuited by metal rings at both ends.
Bearings
GE uses self-aligning spherical seat sleeve bearings per DIN
31693/4. Seal additions are also available to meet IP-56
requirements. Anti-friction bearings are available with
grease in a sealed housing to avoid contamination meeting
IP56 protection.
Built for Durability
Stator Construction
Laminations are precision punched from high quality, low loss
electrical sheet steel with a temperature stable insulating film.
The magnetic core consists of ring laminations compressed
and completely wound before the core package is inserted
into the frame.
Insulation System
GE uses an epoxy solventless resin vacuum-pressure-im-
pregnation (VPI) process assuring long life. For line voltages
of 5000 Volts and above, a semi-conducting armor is applied
to the slot portion and beyond the core to provide corona
protection. The binding agent is GE’s third generation epoxy
resin, selected and tested to IEEE-1776. The coils receive a
protective armor of heavy glass tape for protection against
mechanical shock and abrasion. Custom Polyseal
®
is a sealed
winding insulation system that meets the requirements of
NEMA MG1 20.18..
It is available upon
request to operate in
severe environments
containing moisture,
oil, chemicals and
salt water.
The stator assembly
is configured for
increased air flow
which improves
heat transfer and
provides a more
compact design.
Self-aligning spherical seat sleeve bearings have features designed
to keep the oil in and the dirt out.
Copper bars are brazed
to their endrings, and
aluminum bars are
welded to their endrings.
Copper
Conductor
Ground Wall
Insulation
Turn
Insulation
Strand
Insulation