US 6,886,236 B2 · Stator for an automotive alternator

Abstract

A stator for an automotive alternator is provided with good installation characteristics for stator coils and which can lower noise. The stator includes a stator core in which a plurality of slots are formed at an inner circumference thereof and stator coils which are fitted into the slots. A rotor is provided inside the stator and includes a rotor coil, and a pole core for housing the rotor coil. Two slots are provided for each set of stator coils, each phase and each magnetic pole and the total number of slots is seventy-two or more. The stator core formed by laminating a plurality of sheet-shaped magnetic members. The stator coils are disposed in the slots, and the stator core is rounded such that the stator coils become the inner side thereof and both end surfaces thereof are contacted to connect the stator core in an annular shape.

Claims12

Dependent claims

A method for forming a stator for an automotive alternator comprising:

punching a plurality of sheet-shaped magnetic members into a predetermined shape;
forming a stator core having a rectangular shape by laminating said sheet-shaped magnetic members, said stator core having end surfaces, a yoke disposed between said end surfaces, a plurality of teeth on one side of said yoke defining a plurality of slots having a trapezoidal shape;
forming stator coils by inserting straight portions of a plurality of wire strand groups into each of said slots;
and
bringing together and welding said end surfaces of said stator core thus changing said rectangular shape of said stator core to an annular shape and lining up said slots in a radial direction, wherein a number of said slots provided for each phase of said stator coils and each magnetic pole is two.

2 more elements

Dependencies are inferred from the claim text.

Stator for an automotive alternator

Life of this patent

Stator for an automotive alternator

Life of this patent

Abstract

Claims12