Stator winding arrangement of alternator for vehicle
AssigneeDenso Corporation
InventorsAtsushi Umeda, Tsutomu Shiga, Shin Kusase
Life of this patent
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Abstract
An alternator for a vehicle includes a fan for supplying cooling air along an inner circumference of coil-end groups disposed opposite ends of a stator in an axial direction. Each of the coil-end groups is composed of a plurality inner coil-end portions disposed at an inner circumference of the coil-end groups to extend from an end of the stator core and outer coil-end portions disposed at an outer circumference of the coil-end groups to extend from an end of the stator core. The inner coil-end portion extends in a direction between the axial direction and rotating direction of the rotor.
Claims16
An alternator for a vehicle, comprising:
- a stator having a stator core with a plurality of slots and a stator winding,
- a rotor disposed opposite said stator, and
- means for supplying cooling substance along an inner circumference of said coil-end groups in an axial direction, wherein
- said stator winding comprises conductor portions disposed in said stator core and a pair of annular coil-end groups disposed on opposite ends of said stator core,
- one of said coil-end groups comprises a plurality of inner coil-end portions disposed at an inner circumference of said coil-end groups to extend from an end of said stator core and outer coil-end portions disposed at an outer circumference of said coil-end groups to extend from the same end of said stator core,
- said inner coil-end portions extend in a direction between the axial direction and rotating direction of said rotor thereby forming cooling passages alone said inner coil-end portions, and
- said rotor is disposed such that said cooling substance supplied from said means for supplying cooling substance in said axial direction is directed into said cooling passages.
An alternator for a vehicle comprising:
- a magnetic field rotor having a pole core and a field coil,
- a stator having a stator core with a plurality of slots, said stator including a multi-phase stator winding disposed in said slots, and
- a cooling air generator for supplying cooling air in an axial direction of said core, wherein
- said multi-phase stator winding has a plurality of pair conductor portions disposed respectively in front and rear layers,
- each of said conductor portions is connected between a pair of coil-end portions extending from opposite ends of said stator core,
- one of said coil-end portions is connected to one of said conductor portions disposed in one layer of one of said slots, said one of said conductor portions is connected to another of said coil end portions which is connected to another of said conductor portions disposed in a different layer of another of said slots so that coil-ends can be formed from two conductor portions,
- whereby specific patterns are formed successively on the opposite ends of said stator core and those of said conductor portions connected to said coil-end groups disposed on the innermost circumference of said stator core are inclined in the same direction on each of the opposite ends, thereby forming cooling air passages along said conductor portions connected to said coil-end groups disposed on said innermost circumference;
- and
- said rotor is disposed such that said cooling air supplied from said cooling air generator in said axial direction is directed into said cooling air passages.
Dependencies are inferred from the claim text.