Stator assembly for electrical machines and method of making the same
AssigneeHoneywell International Inc.
InventorsRajinder S. Bharaj, Gerald Rosul, Gregor McDowall
Life of this patent
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Abstract
A stator for a rotating electrical machine, such as a motor or generator, is wound with stator coils having non-slot-insertion segments that include a twisted segment that is twisted a predetermined number of degrees. The twisted segment is additionally bent at a predetermined angle relative to a reference plane. This combination of twist and bend reduces the likelihood of damage to the insulating coating on the stator coils, and increases the clearance between adjacent coils as compared to other stator designs. As a result, electrical interference between adjacent coils is minimized.
Claims20
A staler for a rotating electrical machine, comprising:
- a stator core having an outer circumferential surface and an opening therethrough that forms an inner circumferential surface;
- at least two longitudinal slots formed in the inner circumferential surface of the stator core;
- and
- at least one stator coil having a first slot-insertion segment and a second slot-insertion segment interposed by a non-slot-insertion segment, the first and second slot-insertion segments extending parallel to one another in a first plane and inserted, one each, within a separate slot, the non-slot-insertion segment having non-twisted apex at a predetermined position thereon, and a first non-twisted segment and a second non-twisted segment interposed by a twisted segment, the first and second non-twisted segments each having a non-twisted section adjacent the first and second slot-insertion segments, respectively,
- wherein the twisted segment is twisted a predetermined number of degrees and includes at least a portion thereof that is bent at a predetermined angle relative to a second plane that is parallel to the first plane.
A rotating electrical machine, comprising:
- a rotationally mounted rotor;
- and
- a stator surrounding the rotor, the stator including:
- a stator core having an outer circumferential surface and an opening therethrough that forms an inner circumferential surface,
- at least two longitudinal slots formed in the inner circumferential surface of the stator core, and
- at least one stator coil having a first slot-insertion segment and a second slot-insertion segment interposed by a non-slot-insertion segment, the first and second slot-insertion segment extending parallel to one another in a first plane and inserted, one each, within a separate slot, the non-slot-insertion segment having, a non-twisted apex and a first non-twisted segment and a second non-twisted segment interposed by a twisted segment, the first and second non-twisted segments each having a non-twisted section adjacent the first and second slot-insertion segments, respectively,
- wherein the twisted segment is twisted a predetermined number of degrees and includes at least a portion thereof that is bent at a predetermined angle relative to a second plane that is parallel to the first plane.
A coil for insertion into a stator core, comprising:
- a first slot-insertion segment extending in a first plane;
- a second slot-insertion segment extending parallel to the first slot-insertion segment in the first plane;
- and
- a non-slot-insertion segment coupled to the first and second slot-insertion segments together, the non-slot-insertion segment having a non-twisted apex, and a first non-twisted segment and a second non-twisted segment interposed by a twisted segment, the first and second non-twisted segments each having a non-twisted section adjacent the first and second slot-insertion segments, respectively,
- wherein the twisted segment is twisted a predetermined number of degrees and includes at least a portion thereof that is bent at a predetermined angle relative to a second plane that is parallel to the first plane.
Dependencies are inferred from the claim text.