AC generator for vehicles
AssigneeDenso Corporation
InventorsAtsushi Umeda, Tsutomu Shiga, Shin Kusase
Life of this patent
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Abstract
An AC generator for a vehicle including a rotor with a fan, a stator disposed around the outer periphery of the rotor, and a frame. The stator includes a laminated core having a plurality of slots, a plurality of electric conductors in the slots, and an insulator. There is a gap between the electric conductors and the insulator in a diametrical section of the slots, and an area ratio of the gap with respect to the sectional area of the slots is not more than 25%. A portion of the electric conductor positioned within the slot has a substantially rectangular shape along the shape of the slot.
Claims9
An AC generator for a vehicle comprising:
- a rotor having a fan on at least one side of both axial ends, a stator disposed around said rotor, and
- a frame for supporting said rotor and said stator,
- said stator comprising a laminated core having a plurality of slots, a plurality of electric conductors forming a stator winding housed in said slots, and an insulator that is an electric insulator, wherein
- said electric conductors have the same rectangular cross-section inside and outside said slots;
- cross-sectional areas of spacing-gaps, said electric conductors and said insulator are formed in a cross-sectional area of said each of said plurality of slots, and the percentage of the cross-sectional area of each of said spacing gaps with respect to the cross-sectional area of each of said slots is not more than 25%;
- each of said electric conductors which are accommodated in one of said slots and are adjacent to one another are bent where the electric conductors emerge from a first axial opening of said one of said slots in opposite directions with respect to the longitudinal axis of the stator to avoid the formation of a passageway for conducting salt water to said one of said slots;
- each of said slots accommodates a plurality of said electric conductors stacked only in a radial direction;
- said electric conductors emerging from said first axial opening of said slots provide at least four radially stacked layers as a coil end;
- and
- each of said electric conductors stacked as different layers in said coil end is inclined with respect to the axial direction, wherein said electric conductors in said coil end are crossed and are disposed to face each other on their shorter sides in their crossed portion.
Dependencies are inferred from the claim text.