Alternator, stator winding assembly therefor, and method of manufacture for the stator winding assembly
First Claim
1. An alternator comprising:
- a stator having a cylindrical stator core formed with a plurality of slots extending axially at a predetermined pitch in a circumferential direction, and a stator winding installed into said stator core; and
a rotor for forming north-seeking (N) and south-seeking (S) poles about a rotational circumference, said rotor being disposed on an inner circumferential side of said stator core, wherein said stator winding comprises a plurality of winding sub-portions in each of which a strand of wire formed from a continuous wire is wound so as to alternately occupy an inner layer and an outer layer in a slot depth direction within said slots at intervals of a predetermined number of slots by folding over said strand of wire outside said slots at end surfaces of said stator core and form a lap winding having two turns in each lap.
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Accused Products
Abstract
A stator winding includes a plurality of winding sub-portions in each of which a strand of wire formed from a continuous wire is wound so as to alternately occupy an inner layer and an outer layer in a slot depth direction within slots at intervals of a predetermined number of slots and form a lap winding having two turns in each lap, the strands of wire folding over outside the slots at end surfaces of a stator core, four of the strands of wire constituting the winding sub-portions being housed so as to line up in each of the slots in a slot depth direction, turn portions formed by folding the strands of wire over outside the slots at a first end surface of the stator core being disposed circumferentially to form two rows in a radial direction, and turn portions formed by folding the strands of wire over outside the slots at a second end surface of the stator core being disposed circumferentially to form two layers in an axial direction.
28 Citations
10 Claims
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1. An alternator comprising:
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a stator having a cylindrical stator core formed with a plurality of slots extending axially at a predetermined pitch in a circumferential direction, and a stator winding installed into said stator core; and
a rotor for forming north-seeking (N) and south-seeking (S) poles about a rotational circumference, said rotor being disposed on an inner circumferential side of said stator core, wherein said stator winding comprises a plurality of winding sub-portions in each of which a strand of wire formed from a continuous wire is wound so as to alternately occupy an inner layer and an outer layer in a slot depth direction within said slots at intervals of a predetermined number of slots by folding over said strand of wire outside said slots at end surfaces of said stator core and form a lap winding having two turns in each lap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A winding assembly for an alternator, said winding assembly comprising a winding group composed of 2n winding sub-portions disposed at a pitch of p, each of said winding sub-portions being constructed by folding and bending one strand of wire formed from a continuous wire into a pattern, said pattern having:
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first straight portions disposed at a pitch of 2np;
second straight portions disposed at said pitch of 2np being offset by an amount w to a first side in a width direction from said first straight portions and offset by an amount np forwards relative to a direction of disposal of said first straight portions;
third straight portions disposed at said pitch of 2np being offset by said amount w to said first side in said width direction from said second portions and offset by said amount np backwards relative to said direction of disposal of said second straight portions;
fourth straight portions disposed at said pitch of 2np being offset by said amount w to said first side in said width direction from said third straight portions and offset by said amount np forwards relative to said direction of disposal of said third straight portions;
first turn portions linking first ends of said first straight portions to first ends of said second straight portions offset by said amount np forwards relative to said direction of disposal of said first straight portions;
second turn portions linking second ends of said second straight portions to second ends of said third straight portions offset by said amount np backwards relative to said direction of disposal of said second straight portions;
third turn portions linking first ends of said third straight portions to first ends of said fourth straight portions offset by said amount np forwards relative to said direction of disposal of said third straight portions; and
fourth turn portions linking second ends of said fourth straight portions to second ends of said first straight portions offset by said amount np forwards relative to said direction of disposal of said fourth straight portions, wherein said winding sub-portions are disposed parallel to each other at said pitch of p in said direction of disposal such that said first to fourth straight portions form four layers in said width direction, said first turn portions are disposed parallel to each other at said pitch of p and said third turn portions are disposed parallel to each other at said pitch of p such that said first turn portions and said third turn portions form two rows in said direction of disposal, and said second turn portions are disposed parallel to each other at said pitch of p and said fourth turn portions are disposed parallel to each other at said pitch of p such that said second turn portions and said fourth turn portions form two layers in a longitudinal direction of said straight portions.
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10. A winding assembly for an alternator, said winding assembly comprising a winding group composed of 2n winding sub-portions disposed at a pitch of p, each of said winding sub-portions being constructed by folding and bending one strand of wire formed from a continuous wire into a pattern, said pattern having:
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first straight portions disposed at a pitch of 2np;
second straight portions disposed at said pitch of 2np being offset by an amount w to a first side in a width direction from said first straight portions and offset by an amount np forwards relative to a direction of disposal of said first straight portions;
third straight portions disposed at said pitch of 2np being offset by said amount w to said first side in said width direction from said second portions and offset by said amount np forwards relative to said direction of disposal of said second straight portions;
fourth straight portions disposed at said pitch of 2np being offset by said amount w to said first side in said width direction from said third straight portions and offset by said amount np backwards relative to said direction of disposal of said third straight portions;
first turn portions linking first ends of said first straight portions to first ends of said second straight portions offset by said amount np forwards relative to said direction of disposal of said first straight portions;
second turn portions linking second ends of said second straight portions to second ends of said third straight portions offset by said amount np forwards relative to said direction of disposal of said second straight portions;
third turn portions linking first ends of said third straight portions to first ends of said fourth straight portions offset by said amount np backwards relative to said direction of disposal of said third straight portions; and
fourth turn portions linking second ends of said fourth straight portions to second ends of said first straight portions offset by said amount np forwards relative to said direction of disposal of said fourth straight portions, wherein said winding sub-portions are disposed parallel to each other at said pitch of p in said direction of disposal such that said first to fourth straight portions form four layers in said width direction, said first turn portions are disposed parallel to each other at said pitch of p and said third turn portions are disposed parallel to each other at said pitch of p such that said first turn portions and said third turn portions form two rows in said direction of disposal, and said second turn portions are disposed parallel to each other at said pitch of p and said fourth turn portions are disposed parallel to each other at said pitch of p such that said second turn portions and said fourth turn portions form two layers in a longitudinal direction of said straight portions.
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Specification