PERMANENT MAGNET SYNCHRONOUS MACHINES0 pages

PERMANENT MAGNET
SYNCHRONOUS MACHINES

Gamesa Electric: Solid references in Permanent Magnets
Understanding of the magnets features, compliance with the customer requirements.

Reliable High performance

Higher efficiency at any load

Permanent Magnet (PM) machines
have been used where simplicity
and cost effective solutions are
required. As the power electronics
are rapidly reducing costs and
increasing both performance and
power rating, PM machines are
becoming the high performance
solution.
No rotor windings means no
brushes, no exciter and no
automatic voltage regulator are
required.

No losses due to electrical
excitation of the rotor coils, so you
can enjoy a really efficient
technology. Being the rotor losses
not load dependant, a significant
part of losses is reduced, resulting
really high performance in a wide
range of loads.

Example of rotor for hydro generation.

As there is less heat to dissipate
because of the lower losses,
coolant requirements and machine
size are minimized. A really nice
power density is obtained, with

smaller sizes in many cases than
an induction or electrically excited
synchronous machine.
Design alternatives available
for low and high speed
In the past only medium speed at
low power were available, because
of the mechanical fixation of the
magnets.
GAMESA ELECTRIC has the tools
and expertise to deliver either
embedded or surface mounted
magnets designs.
No longer motors for just
low power servos
Magnets have been available
for many years, but only low
power was available. Today,
GAMESA
ELECTRIC
can
deliver
machines
with
magnets
with
a
really
powerful magnetic material:
neodymium
iron
boron
(NdFeB), with very high
values of flux density.With
project references up to 4.75
MW, we can deliver PM
generators or motors with
large power rating and speed.