ABB
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ABB | Motors and Generators
| Synchronous motors
Modular stator design enables
performance to be optimized
Each application has its own specific requirements
for motor performance. Our modular stator design allows
us to precisely match the performance of every ABB
synchronous motor to the needs of its application.
The stator core itself is built of stacked, high grade, low-
loss laminated electrical steel, insulated on both sides
with high quality insulating coating (heat-resistant inorganic
coating is also available). The use of high grade core material
increases efficiency and therefore reduces operating costs.
Radial cooling ducts ensure uniform and effective cooling.
The rigid stator construction transmits all forces via the
frame to the foundation to minimize vibrations. The windings
are insulated with Mica based tape. When the windings are
in place, the complete stator undergoes vacuum pressure
impregnation (VPI). The windings are class F insulated,
which gives good thermal margins. This insulation system
has been used very successfully over many years and in
several thousand motors, and it provides reliability and a
long operating life. Long-term reliability is also assured by
the use of well proven methods for locking the coils into
the slots and bracing the coil ends.