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US 6,960,857 B2Granted
Stator for an alternator and method for the manufacture thereof
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsAtsushi Oohashi, Yoshihito Asao, Takushi Takizawa, Yukiyoshi Ohnishi, Hiroshi Hosokawa
Life of this patent
Estimating the term…
Abstract
A stator winding is provided with three distributed winding phase portions each constructed by installing a conductor wire in every third slot. Slot-housed portions of the conductor wires are formed with a rectangular cross section and coil end portions are formed with a circular cross section.
Claims8
A stator for an alternator, comprising:
- a stator core comprising:
- an annular core back portion;
- tooth portions each projecting radially inward from said core back portion, said tooth portions being disposed at a predetermined pitch in a circumferential direction;
- slots defined by adjacent pairs of said tooth portions;
- and
- flange portions projecting to first and second circumferential sides from tip portions of said tooth portions;
- and
- stator winding composed of a plurality of winding phase portions each installed in said stator core in a slot group constituted by a group of said slots disposed at intervals of a predetermined number of slots,
- wherein each of said winding phase portions is constructed by installing a conductor wire in a distributed winding in said slot group so as to project from first and second ends of said slots, be distributed on first and second circumferential sides, and enter each of said slots said predetermined number of slots away on said first and second circumferential sides,
- each of slot-housed portions of said conductor wire housed in said slots is formed with a flat cross section,
- each of coil end portions of said conductor wire linking end portions of said slot-housed portions is formed with a substantially circular cross section, and slot-opening passing portions having a flat cross-sectional shape formed at a boundary portion between said slot-housed portions and said coil end portions, said slot-opening passing portions having a width which is narrower than a width of the slot-housed portions, and
- said slot-housed portions are housed inside each of said slots in a plurality of layers so as to be arranged in at least a single row in a radial direction.
9 more elements
A stator for an alternator, comprising:
- a stator core comprising:
- an annular core back portion;
- tooth portions each projecting radially inward from said core back portion, said tooth portions being disposed at a predetermined pitch in a circumferential direction;
- slots defined by adjacent pairs of said tooth portions;
- and
- flange portions projecting to first and second circumferential sides from tip portions of said tooth portions;
- and
- stator winding composed of a plurality of winding phase portions each installed in said stator core in a slot group constituted by a group of said slots disposed at intervals of a predetermined number of slots,
- wherein each of said winding phase portions is constructed by installing a conductor wire in a distributed winding in said slot group so as to project from first and second ends of said slots, be distributed on first and second circumferential sides, and enter each of said slots said predetermined number of slots away on said first and second circumferential sides,
- each of slot-housed portions of said conductor wire housed in said slots is formed with a flat cross section,
- each of coil end portions of said conductor wire linking end portions of said slot-housed portions is formed with a substantially circular cross section,
- said slot-housed portions are housed inside each of said slots in a plurality of layers so as to be arranged in at least a single row in a radial direction, and
- wherein said conductor wire comprises slot-opening passing portions having a flat cross-sectional shape formed at a boundary portion between said slot-housed portions and said coil end portions at a first axial end of said stator core, said slot-opening passing portions being disposed such that longitudinal axes of the cross sections thereof are substantially aligned in a radial direction, and said slot-opening passing portions being formed such that a circumferential width thereof is smaller than a width of an opening of said slots.
10 more elements
Dependencies are inferred from the claim text.