US4363988A — Induction disk motor with metal tape components

Claim 1

Independent Claim 286 words

An electrical machine comprising, in combination: a first ferromagnetic stator body; a ferromagnetic rotor body disposed adjacent said stator body and being rotatable with respect thereto, said rotor body and stator body being separated from one another by an air gap and being magnetically coupled to one another through said air gap; said stator body comprising a coil of concentric turns of a thin elongated metal tape wound in the form of an annulus with a central opening; said stator body annulus having first and second end surfaces, and a plurality of symmetrically distributed slots extending axially across at least a portion of the radial thickness of said first end surface and in a direction perpendicular to the layers of said tape and extending into said annulus for a predetermined depth; first stator winding means wound in said slots; said rotor body comprising a second coil of concentric layers of metal tape wound in the form of a second annulus, and a second plurality of symmetrically distributed slots, coordinated in number with the number of slots in said stator body, extending across at least a portion of the radial thickness of one end of said second annulus in a direction perpendicular to the layers of said second coil of tape and extending into said second annulus for a predetermined depth, said second coil of tape including a third plurality of slots disposed symmetrically with said second plurality of slots and extending into the opposite end of said rotor annulus, said second and third plurality of slots defining a thin, readily-saturable bridge between each opposed pair of slots thereof; and squirrel cage type winding means including radial winding sections disposed in said slots of said rotor body.

Claim 2

Dependent Claim 286 words

An electrical machine comprising, in combination: a first ferromagnetic stator body; a ferromagnetic rotor body disposed adjacent said stator body and being rotatable with respect thereto, said rotor body and stator body being separated from one another by an air gap and being magnetically coupled to one another through said air gap; said stator body comprising a coil of concentric turns of a thin elongated metal tape wound in the form of an annulus with a central opening; said stator body annulus having first and second end surfaces, and a plurality of symmetrically distributed slots extending axially across at least a portion of the radial thickness of said first end surface and in a direction perpendicular to the layers of said tape and extending into said annulus for a predetermined depth; first stator winding means wound in said slots; said rotor body comprising a second coil of concentric layers of metal tape wound in the form of a second annulus, and a second plurality of symmetrically distributed slots, coordinated in number with the number of slots in said stator body, extending across at least a portion of the radial thickness of one end of said second annulus in a direction perpendicular to the layers of said second coil of tape and extending into said second annulus for a predetermined depth, said second coil of tape including a third plurality of slots disposed symmetrically with said second plurality of slots and extending into the opposite end of said rotor annulus, said second and third plurality of slots defining a thin, readily-saturable bridge between each opposed pair of slots thereof; and squirrel cage type winding means including radial winding sections disposed in said slots of said rotor body.

Claim 3

Dependent Claim 70 words

The machine of claim 1 wherein said elongated tape forming said rotor body has preformed notches of substantially equal size extending symmetrically into either side thereof to define said second and third slots respectively; said notches being spaced apart from each other along the length of said tape by a progressively increasing distance so as to cause registry of notches in successive and increasing diameter layers of said second tape.

Claim 4

Dependent Claim 12 words

The electrical machine of claim 1 wherein said tape comprises amorphous metal.

Claim 5

Dependent Claim 12 words

The electrical machine of claim 2 wherein said tape comprises amorphous metal.

Claim 6

Dependent Claim 234 words

An electrical machine comprising, in combination: a ferromagnetic stator body; a ferromagnetic rotor body disposed adjacent said stator body and being rotatable with respect thereto, said rotor body and stator body being physically separated from one another by an air gap and being magnetically coupled to one another through said air gap, said rotor body comprising a coil of concentric turns of a thin elongated metal tape wound in the form of an annulus having first and second end surfaces, said tape having preformed notches of substantially equal size extending perpendicularly into both edges of said tape so as to define a thin, readily-saturable bridge between the notches of each opposed pair of notches in said tape, said notches in each respective edge of said tape being spaced apart from each other along the length of said tape by a progressively increasing distance so as to cause registry of notches in successively increasing diameter layers of said tape and thereby form a plurality of symmetrically distributed slots extending axially across at least a portion of the radial thickness of said first end surface and of said second end surface in a direction perpendicular to the layers of said tape and extending into said annulus from each end surface for a predetermined depth; and first and second rotor windings, respectively, at least partly wound in said slots in said first and second end surfaces, respectively.

Claim 7

Dependent Claim 234 words

An electrical machine comprising, in combination: a ferromagnetic stator body; a ferromagnetic rotor body disposed adjacent said stator body and being rotatable with respect thereto, said rotor body and stator body being physically separated from one another by an air gap and being magnetically coupled to one another through said air gap, said rotor body comprising a coil of concentric turns of a thin elongated metal tape wound in the form of an annulus having first and second end surfaces, said tape having preformed notches of substantially equal size extending perpendicularly into both edges of said tape so as to define a thin, readily-saturable bridge between the notches of each opposed pair of notches in said tape, said notches in each respective edge of said tape being spaced apart from each other along the length of said tape by a progressively increasing distance so as to cause registry of notches in successively increasing diameter layers of said tape and thereby form a plurality of symmetrically distributed slots extending axially across at least a portion of the radial thickness of said first end surface and of said second end surface in a direction perpendicular to the layers of said tape and extending into said annulus from each end surface for a predetermined depth; and first and second rotor windings, respectively, at least partly wound in said slots in said first and second end surfaces, respectively.

Claim 8

Dependent Claim 23 words

The machine of claim 5 including squirrel cage type winding means having radial winding sections disposed in said slots of said rotor body.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1985-12-13	1986-06-14	1986-12-14	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1989-12-13	1990-06-14	1990-12-14	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1993-12-13	1994-06-14	1994-12-14	$7700.00	Window Closed / Lapsed

Induction disk motor with metal tape components

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag