Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1995-11-06
1997-03-04
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310156, 310166, 310105, 310 62, H02K 1700
Patent
active
056082819
ABSTRACT:
An axial flux induction motor has a stator and a disc-shaped rotor facing the stator with an air gap there-between. The rotor disc includes a first material of relatively high magnetic permeability and a second material of relatively high electrical conductivity, the first material being of higher specific gravity than the second material. The first material is in the form of an annular ring imbedded in or supported on one surface of the disc, opposite the surface thereof which faces the stator. The outer radius R.sub.1 of the annular ring and the outer radius R.sub.2 of the disc are related so that 1.2 R.sub.1 <R.sub.2 <1.6 R.sub.1. This achieves that at high rotational speeds the two disc materials will be subjected to more nearly equal centrifugal forces thereby making it feasible to operate at higher motor speeds.
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Kubzdela et al., "Magnetodielectrics in Induction Motors with Disk Rotor," IEEE Transactions on Magnetics, vol. 24, No. 1, Jan. 1988.
Kubzdela et al, "Magnetodielectrics In Induction Motors With Disk Rotor", I.E.E.E. Transactions On Magnetics, BD. 24, Nr. 1, Jan. 1988.
Stefan Kubzdela and Bogumil Weglinski, "Magnetodielectrics in Induction Motors with Disk Rotor", IEEE Transactions on Magnetics (1988), vol. 24, Jan., No. 1, New York.
Gerling Dieter
Lurkens Peter
Blocker Edward
Mullins Burton S.
Stephan Steven L.
U.S. Philips Corporation
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