Axial air gap motor

Claim 2

An axial air gap motor for A.C. or D.C. operation of the type having a C-shaped stator, comprising in combination: a disc-shaped rotor of non-conductive plastic material, a plurality of equally spaced ferro magnetic rotor pole pieces mounted in said rotor and isolated one from the other, a stator having a plurality of equally spaced stator pole pieces mounted therein greater in number than the rotor pole pieces, each said stator pole piece comprising a C-shaped electro magnet straddling said rotor juxtaposed the rotor pole pieces and providing an axial air gap therebetween, a field winding on each said electro-magnet, and means for simultaneously energizing selected pole pieces of said plurality of stator pole pieces which are equally spaced from each other and equally displaced from selected rotor pole pieces, said selected rotor pole pieces being linked by the field of the stator pole pieces to attract said selected rotor and stator pole pieces into alignment with each other.

Claim 3

An axial air gap motor as set forth in claim 1 wherein said rotor disc comprises a moldable non-conducting plastic and said rotor pole pieces comprise electro-magnetic iron poles isolated one from the other in said plastic.

Claim 4

An axial air gap motor for A.C. or D.C. operation of the type having a C-shaped stator, comprising in combination: a disc-shaped rotor of non-conductive material, a plurality of equally spaced ferro-magnetic rotor pole pieces mounted in said rotor, a stator having a plurality of equally spaced stator pole pieces mounted therein greater in number than the rotor pole pieces, said stator comprising a non-conducting plastic material in which said stator pole pieces are isolated one from the other, each said stator pole piece comprising a C-shaped electro magnet straddling said rotor juxtaposed the rotor pole pieces and providing an axial air gap therebetween, a field winding on each side electro-magnet, and means for simultaneously energizing selected pole pieces of said plurality of stator pole pieces which are equally spaced from each other and equally displaced from selected rotor pole pieces, said selected rotor pole pieces being linked by the field of the stator pole pieces to attract said selected rotor and stator pole pieces into alignment with each other.

Claim 5

An axial air gap motor for A.C. or D.C. operation of the type having a C-shaped stator, comprising in combination: a disc-shaped rotor of non-conductive material, a plurality of equally spaced ferro-magnetic rotor pole pieces mounted in said rotor, a stator having a plurality of equally spaced stator pole pieces mounted therein greater in number than the rotor pole pieces, said stator comprising a non-conducting plastic material in which said stator pole pieces are isolated one from the other, each said stator pole piece comprising a C-shaped electro magnet straddling said rotor juxtaposed the rotor pole pieces and providing an axial air gap therebetween, a field winding on each side electro-magnet, and means for simultaneously energizing selected pole pieces of said plurality of stator pole pieces which are equally spaced from each other and equally displaced from selected rotor pole pieces, said selected rotor pole pieces being linked by the field of the stator pole pieces to attract said selected rotor and stator pole pieces into alignment with each other.

Claim 6

An axial air gap motor as set forth in claim 3 wherein said stator pole pieces and said rotor pole pieces each comprise a laminate of electrical sheet steel.

Claim 7

An axial air gap motor as set forth in claim 4 wherein the stator and rotor pole pieces are wedge-shaped in cross section to provide a maximum cross sectional area for magnetic flux to link the pole pieces.

Claim 8

An axial air gap motor as set forth in claim 1 wherein the means for simultaneously energizing selected pole pieces of said plurality of stator pole pieces comprises switch means connected in series between a D.C. pulse source and the field windings, and a full wave rectified A.C. power source for providing the D.C. pulse source whereby predetermined field windings are energized by said D.C. pulse source to move the rotor in synchronism with the switching of the switch means.