16-06-2010, 12:55 PM
if your college has ieee access the use this page link to get it http://ieeexplore.ieeeiel2/3493/10324/00485026.pdf
Written-Pole® Advantage
Written-Pole® motors and generators incorporate a continuous layer of magnetic material on the surface of the rotor which can be magnetized into any desired pole configuration using a high density winding contained within the stator windings. As the magnet material passes beneath this excitation winding, it is subjected to an alternating magnetic field produced by AC current flowing in the winding. The strength and orientation of this magnetic field controls the geometry of the magnetic poles induced on the rotor. If the polarity of the magnet material passing beneath the excitation winding does not match the polarity of the magnetic field produced by the winding, the polarity of the magnet is reversed to match the field produced by the excitation winding.
Written-Pole®Applications
The application of Written-Pole® technology to electric motors yields many desirable characteristics including very low starting current requirements, high operating efficiency, unity power factor operation, instantaneous restart capability, the ability to synchronize under load, and the capability to start very high inertia loads without over-sizing.
When applied to electric generators, Written-Pole® technology allows for the regulation of output voltage and frequency over a considerable speed range without relying on external regulators or power electronics. Combining Written-Pole® motors and generators with an integral flywheel allows Precise Power Corporation to create a simple, rugged power protection unit that is ideally suited for rugged industrial and commercial environments where space and infrastructure costs are key considerations.
read more
http://meridiumpower.ca/C/c.html
http://precisepwrTechnology.asp?bhcp=1
Written-Pole® Advantage
Written-Pole® motors and generators incorporate a continuous layer of magnetic material on the surface of the rotor which can be magnetized into any desired pole configuration using a high density winding contained within the stator windings. As the magnet material passes beneath this excitation winding, it is subjected to an alternating magnetic field produced by AC current flowing in the winding. The strength and orientation of this magnetic field controls the geometry of the magnetic poles induced on the rotor. If the polarity of the magnet material passing beneath the excitation winding does not match the polarity of the magnetic field produced by the winding, the polarity of the magnet is reversed to match the field produced by the excitation winding.
Written-Pole®Applications
The application of Written-Pole® technology to electric motors yields many desirable characteristics including very low starting current requirements, high operating efficiency, unity power factor operation, instantaneous restart capability, the ability to synchronize under load, and the capability to start very high inertia loads without over-sizing.
When applied to electric generators, Written-Pole® technology allows for the regulation of output voltage and frequency over a considerable speed range without relying on external regulators or power electronics. Combining Written-Pole® motors and generators with an integral flywheel allows Precise Power Corporation to create a simple, rugged power protection unit that is ideally suited for rugged industrial and commercial environments where space and infrastructure costs are key considerations.
read more
http://meridiumpower.ca/C/c.html
http://precisepwrTechnology.asp?bhcp=1
