Rotary electric machine having resin covered joined portions
AssigneeDenso Corporation
InventorShigenobu Nakamura
Life of this patent
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Abstract
A rotary electric machine has a stator winding which forms a coil end group on an axial end of a stator. A plurality of conductors are regularly arranged in a row in the coil end group, and an insulating resin is soaked into there between. The insulating resin forms a number of grooves on a radial outside of the coil end group and forms a smooth surface on a radial inside of the coil end group. Therefore, it is possible to decrease an amount of the insulating 10 resin, to provide a high rigidity to the coil end group and to provide a surface area on the outside to radiate heat.
Claims12
A rotary electric machine comprising:
- a rotor having a pole core having claw poles and a cooling fan disposed on an axial end of said pole core;
- a stator having a stator core and a stator winding positioned on said stator core, said stator winding comprising a plurality of conductor segments providing a portion accommodated in slots of said stator core and a coil end portion extended from said slots, each of said conductor segments having a turn portion, an inclined portion crossing the other conductor segment at said coil end portion and a tip end portion joined to another for providing a joined portion, said coil end portion including a first group in which a plurality of said turn portions are arranged and a second group in which a plurality of said joined portions are arranged;
- a frame for supporting said rotor and said stator;
- a pulley for rotating said rotor;
- and
- a resin member including a ring-shaped first resin member disposed on said second group for covering said joined portions and a second resin member adhered to a bridge between said inclined portions in said second group.
A rotary electric machine having a stator core and a stator winding formed by joining a plurality of U-shaped conductor segments at ends thereof, comprising:
- a first group disposed on a first end of said stator core and having a plurality of turn portions of said U-shaped conductor segments;
- a second group disposed on a second end of said stator core and having a plurality of joined portions which is formed by joining said ends of said U-shaped conductor segments;
- and
- an insulating resin provided on a surface of said U-shaped conductor segments being thicker in said second group than in said first group.
A rotary electric machine having a stator core and a stator winding formed by joining a plurality of U-shaped conductor segments at ends thereof, comprising:
- a first group disposed on a first end of said stator core and having a plurality of turn portions of said U-shaped conductor segments;
- a second group disposed on a second end of said stator core and having a plurality of joined portions which is formed by joining said ends of said U-shaped conductor segments;
- a first insulating resin for covering said joined portions;
- and
- a second insulating resin for covering only said U-shaped conductor segment in said second group.
A rotary electric machine having a stator core and a stator winding formed by joining a plurality of conductor segments at ends thereof, comprising:
- a coil end group formed by said stator winding, said coil end group being extended from an end of said stator core in an axial direction;
- and
- an insulating resin provided on said coil end group for providing an inner surface and an outer surface, said inner surface being smoother than said outer surface.
Dependencies are inferred from the claim text.