Rotor with hollow cylindrical permanent magnet
AssigneeREM Technologies, Inc.
InventorsRodolfo Palma, William H. Miller
Life of this patent
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Abstract
A rotor for a dynamoelectric machine, without windings and rotatable about a central longitudinal axis, having an axially extending rotatable body and a toroidal magnet coaxially mounted on the body is constructed to provide magnetic exitation for the rotor. The rotatable body contains a first set of circumferentially spaced axially extending salient poles with circumferentially spaced recesses therebetween and a second set of similar poles at an opposite axial location. The toroidal magnet is coaxially mounted on the body between the first and second set of salient poles. A second toroidal magnet may also be mounted on the body and a magnetic spacer placed in between both toroidal magnets.
Claims16
A winding-less rotor for a dynamoelectric machine rotatable about a central longitudinal axis comprising:
- an axially extending elongate rotatable body containing a first set of circumferentially spaced axially extending salient poles with circumferentially spaced recesses therebetween at one axial location and a second set of circumferentially spaced axially extending salient poles with recesses therebetween at an opposite axial location;
- and
- a single toroidal magnet coaxially mounted on said body wherein the toroidal magnet is coaxially oriented on the body between the first and second set of circumferentially spaced axially extending salient poles.
A winding-less rotor for a dynamoelectric machine rotatable about a central longitudinal axis comprising:
- an axially extending elongate rotatable body containing a first set of circumferentially spaced axially extending salient poles with circumferentially spaced recesses therebetween at one axial location and a second set of circumferentially spaced axially extending salient poles with recesses therebetween at an opposite axial location;
- and
- first and second toroidal magnets coaxially mounted and oriented on said body between the first and second set of circumferentially spaced axially extending salient poles wherein facing sides of the first and second toroidal magnets are of opposite polarities.
A dynamoelectric machine having a stator assembly comprising a non-magnetic spool-like structure having a hollow, elongated central portion extending about the rotor, said spool-like structure having axially spaced end portions that extend radially outward relative to a longitudinal axis from respective ends of the central portion and a circumferentially distributed plurality of generally C-shaped, generally longitudinally extending armature cores supported by the end portions of the spool-like structure, said dynamoelectric machine further including a windingless rotor comprising:
- an axially extending elongate rotatable body;
- and
- one or more toroidal magnets coaxially mounted on said body so that facing sides of said magnets are of opposite polarities where there is more than one of said toroidal magnets.
Dependencies are inferred from the claim text.