US 4,327,302 A · Electronically commutated motor, stationary and rotatable assemblies therefore, and lamination

Abstract

A lamination adapted to be used in a dynamoelectric machine. The lamination has a body of generally thin ferromagnetic material, and a plurality of pole sections are spaced apart from each other generally about the body. A plurality of means on the body are interposed between adjacent ones of the pole sections for bridging therebetween, respectively, and a plurality of other pole sections on the body are interposed in spaced relation between the adjacent ones of the first named pole sections, respectively. A plurality of pairs of other means on the body are interposed between the adjacent ones of the first named pole sections and the other pole sections for bridging therebetween, respectively. An electronically commutated motor, a stationary assembly therefor, and a rotatable assembly therefor are also disclosed.

Claims53

Dependent claims

A lamination adapted to be used in a core of a dynamoelectric machine, the lamination comprising:

a unitary body of generally thin ferromagnetic material;
an outer peripheral edge of said body;
an inner peripheral edge on said body and spaced generally radially from said outer peripheral edge;
a plurality of generally V-shaped openings through said body between said outer peripheral edge and said inner peripheral edge and disposed with respect to each other generally in arcuate spaced relation about said body, said openings each having first and second leg parts converging toward each other generally in a direction from said outer peripheral edge toward said inner peripheral edge, said first and second leg parts including first and second pairs of opposed side edges, first and second end edges interposed between said first and second side edge pairs and spaced adjacent said outer peripheral edge, and a common end edge interposed between one of said opposed side edges of said first and second side edge pairs and spaced adjacent said inner peripheral edge, respectively;
a plurality of first pole sections on said body between opposite ones of said one opposed side edges of said first and second side edge pairs in adjacent ones of said openings and extending generally between said outer peripheral edge and said inner peripheral edge, respectively;
a plurality of bridges on said body between said common end edges and said inner peripheral edge and integrally interconnected between adjacent ones of said first pole sections, respectively;
a plurality of second pole sections on said body disposed between the other of said opposed side edges of said first and second side edge pairs and extending from said outer peripheral edge generally toward said inner peripheral edge, said second pole sections including a plurality of free end edges interposed between said other opposed side edges of said first and second side edge pair and spaced from said bridges, respectively;
and
a plurality of pairs of bridges on said body between said outer peripheral edge and said first and second end edges of said first and second leg parts and integrally interconnected between said first pole sections and said second pole sections, respectively.

6 more elements

A rotatable assembly adapted to be used in a dynamoelectric machine, the rotatable assembly comprising:

a ferromagnetic core having a peripheral portion interposed between a pair of opposite end faces;
a bore in said core intersecting with said opposite end faces;
a plurality of slots intersecting with said peripheral portion between said opposite end faces and arranged generally in arcuate spaced relation with each other about said core, said slots each including a pair of opposed sidewalls converging generally toward each other in a direction from said peripheral portion toward said bore, and a base wall generally adjacent said bore interposed between said opposed sidewalls;
a plurality of pairs of opposed flanges on said core extending between said opposite end faces at least adjacent said peripheral portion and said flange pairs each being arranged so as to protrude into said slots past said opposed sidewalls thereof, respectively;
a plurality of ferromagnetic pole sections arranged in said slots between said opposed sidewalls thereof and said opposed flanges, respectively, said pole sections each including another peripheral portion arranged so as to be at least generally coextensive with said first named peripheral portion on said core, a pair of opposite sidewalls converging generally toward each other in a direction from said another peripheral portion toward said bore so as to be arranged generally in facing relation with said opposed sidewalls of said slots and said opposed flanges, another base wall interposed between said opposite sidewalls and arranged generally in facing relation with said first named base wall, and a pair of opposite seats integral with said opposite sidewalls at least generally adjacent said another base wall and extending generally toward said opposed sidewalls of said slots, respectively;
a plurality of pairs of magnetic material elements arranged within said slots in abutting engagement between said opposed sidewalls of said slots and said opposite sidewalls of said pole sections and with a part of said magnet material element pairs engaged with said seats on said pole sections, respectively;
and
a hardenable non-magnetic material solidified in place within said slots so as to generally fill the interstices thereof between said flange pairs and said magnetic material element pairs and between said pole sections and parts of said core adjacent thereto, said hardenable material acting with said magnetic material element pairs to not only define the polarity of said pole sections from said adjacent core parts but also to retain said pole sections against displacement from said slots, respectively.

5 more elements

A stationary assembly adapted to be used in a dynamoelectric machine, the stationary assembly comprising;

a ferromagnetic core having a peripheral portion interposed between a pair of opposite end faces, said core including a plurality of generally radially extending teeth each having an inner tip defining in part a bore extending generally axially through said core between said opposite end faces thereof, and a plurality of slots arranged between adjacent ones of said teeth so as to intersect with said bore and extending between said opposite end faces, each of said slots having a top section and a bottom section with said top section being adjacent said bore, respectively;
a multi-stage winding arrangement associated with said core and having at least three winding stages each including a plurality of coils spanning a preselected number of said teeth, and each of said coils having at least one conductor turn and a pair of opposite side turn portions, respectively, at least half of said coils in each of said at least three winding stages having one of said opposite side turn portions thereof sharing a plurality of individual ones of said slots with one of said opposite side turn portions of another coil in a same winding stage, said one opposite side turn portion of said at least half of said coils and said one opposite side turn portion of said another coil in said same winding stage being disposed in one of said top section and said bottom section of said individual ones of said slots, respectively, a first pair of said coils in one of said winding stages of said at least three winding stages having one of said opposite side turn portions thereof disposed in one of said top section and said bottom section of a first pair of said slots and a second pair of said coils in another of said winding stages of said at least three winding stages having one of said opposite side turn portions thereof disposed in the other of said top section and said bottom section of said first slot pair, respectively, a third pair of said coils in one of said one winding stage and and said another winding stage having one of said opposite side turn portions thereof disposed in one of said top section and said bottom section of a second pair of said slots and a fourth pair of said coils in a third one of said winding stages of said at least three winding stages having one of said opposite side turn portions thereof disposed in the other of said top section and said bottom section of said second slot pair, respectively, a fifth pair of said coils in the other of said one winding stage and said another winding stage having one of said opposite side turn portions thereof disposed alone in a third pair of said slots, respectively, and a sixth pair of said coils in said third one of said winding stages having one of said opposite side turn portions thereof disposed alone in a fourth pair of said slots, respectively.

An electronically commutated motor comprising:

a ferromagnetic stator having a bore therein;
a plurality of winding receiving slots in said stator and intersecting with said bore;
a multi-stage winding arrangement associated with said slots of said plurality thereof and including at least three winding stages adapted to be commutated in at least one preselected sequence, each of said winding stages having a plurality of coils, each of said coils in said each winding stage having at least one conductor turn and a pair of opposite side turn portions, respectively, some of said coils in said each winding stage having at least one of said opposite side turn portions thereof disposed in individual ones of said slots with one of said opposite side turn portions of another of said coils in a same winding stage, respectively, one of said coils of two winding stages each having one of said opposite side turn portions thereof disposed in one slot of a first pair thereof and another of said coils of said two winding stages each having one of said opposite side turn portions thereof disposed in the other slot of said first slot pair, respectively, a third coil in one of said two winding stages and one coil in a third winding stage each having one of said opposite side turn portions thereof disposed in one slot of a second pair thereof and a fourth coil in said one of said two winding stages and another coil in said third winding stage each having one of said opposite side turn portions thereof disposed in the other slot of said second slot pair, and two coils of said coil plurality in the other of said two winding stages each having one of said opposite sides thereof disposed in a third pair of said slots, respectively;
a rotor disposed at least in part within said stator bore in magnetic coupling relation with said at least three winding stages and including a peripheral portion interposed between a pair of opposite end faces and arranged generally in coaxial relation with said stator bore, a shaft receiving opening extending through said rotor and intersecting with said opposite end faces, a plurality of discrete first pole sections integrally interconnected with each other and arranged in spaced relation generally about said rotor between said opposite end faces thereof, respectively, a plurality of other slots intersecting said peripheral portion between said opposite end faces and interposed between adjacent ones of said first pole sections, respectively, said other slots of said plurality there each having a pair of opposed sidewalls converging generally toward each other in a direction from said peripheral portion toward said shaft receiving opening with a base wall adjacent thereto interposed between said opposed sidewalls, and a plurality of pairs of opposed flanges extending between said opposite end faces at least adjacent said peripheral portion with said opposed flanges arranged so as to protrude into said other slots past said opposed sidewalls thereof, respectively;
a plurality of discrete second pole sections arranged in said other slots between said opposed sidewalls thereof, respectively, said second pole sections each including another peripheral portion arranged so as to be at least generally coextensive with said first named peripheral portion, a pair of opposite sidewalls converging generally toward each other in a direction from said another peripheral portion toward said shaft receiving opening so as to be arranged generally in facing relation with said opposed sidewalls of said other slots and said opposed flanges, an end wall interposed between said opposite sidewalls and arranged generally in facing relation with said base wall, and a pair of opposite seats integral with said opposite sidewalls at least generally adjacent said end wall and extending generally toward said opposed sidewalls of said other slots respectively;
a plurality of pairs of magnetic material elements arranged in abutting engagement between said opposed sidewalls of said other slots and said opposite sidewalls of said second pole sections and with parts of said magnetic material element pairs engaged with said seats on said second pole sections, respectively;
and
a hardenable non-magnetic material solidified in place within said other slots generally filling them and disposed between said flanges, said magnetic material element pairs, said first pole sections and said second pole sections so as to not only retain said second pole sections against displacement from said other slots but also to magnetically define the polarity of said first pole sections from that of said second pole sections, respectively.

5 more elements

Dependencies are inferred from the claim text.

Electronically commutated motor, stationary and rotatable assemblies therefore, and lamination

Life of this patent

Electronically commutated motor, stationary and rotatable assemblies therefore, and lamination

Life of this patent

Abstract

Claims53