Stator cooling 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 stator, a rotor and a pair of cooling fans fixed on opposite sides of the rotor. The stator winding is composed of a conductor group disposed in the stator core and a pair of annular coil-end groups extending from the conductor group to be disposed on opposite sides of said stator core. Each of the coil-end groups has a plurality of coil ends which has a pair of inclined portion, and each one of the inclined portion disposed at the outermost circumference of the coil-end groups inclines to guide the cooling air spirally in an axial direction.
Claims13
An alternator for a vehicle including:
- stator having a stator core, and a stator winding,
- a rotor disposed opposite said stator, and
- means for sending a cooling medium across said stator winding, wherein
- said stator winding comprises a conductor group disposed in said stator core and a pair of annular coil-end groups respectively extending from said conductor group so that each coil-end group of said pair of annular coil-end groups are disposed on opposite sides of said stator core,
- each of said conductor groups comprises a plurality of conductor portions and each of said coil-end groups comprises a plurality of coil ends disposed at one end of said stator core,
- each of said coil ends has a pair of inclined portions which are inclined with respect to a central longitudinal axis of said stator core, and
- each one of said inclined portions disposed at an outermost circumference of one of said coil-end groups inclines to form a cooling medium passageway to guide said cooling medium spirally in a one-way axial direction.
An alternator for a vehicle including:
- magnetic field rotor,
- a stator having a stator core with a plurality of slots disposed opposite said rotor and a multi-phase stator winding,
- a cooling fan driven with said field rotor,
- a frame for supporting said rotor and said stator, and
- a pulley disposed outside said frame, wherein
- said magnetic field rotor comprises a plurality of claw poles and a field coil,
- said multi-phase stator winding has a plurality of conductors,
- said conductors are disposed to form one or more pairs as outer and inner layers in a depth of aid slots and to extend from opposite ends of said stator core outside said slots so that coil ends can be formed from two conductors respectively disposed in one of said layers different from each other in one of said slots different from each other in specific series connection patterns, whereby
- said specific patterns are formed successively on the opposite ends of said stator core,
- the cooling air is supplied by said cooling fan to flow across said conductors at said coil ends in said frame,
- conductors of said plurality of conductors which are disposed at an outermost circumference of said coil ends are inclined in a circumferential direction to form cooling air passages for guiding said cooling air spirally to portions opposite said pulley outside said frame,
- said rotor is disposed substantially within said stator core.
Dependencies are inferred from the claim text.