Method for manufacturing stator coil and apparatus for manufacturing stator coil
AssigneeDenso Corporation
InventorTakashi Tokizawa
Life of this patent
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Abstract
A stator winding is manufactured by a forming step, a winding step, and a expanding step. In the forming step, an S-shaped offset shape is formed on a conductor part corresponding to a coil end part. Thereby, in a coil end part, it is possible to provide an expected shape stably at the coil end part. The conductor is wound around a bobbin in the winding step. In the winding step, a twisted shape is given to the conductor parts to be the inclined part of the coil end and the conductor part to be accommodated in a slot. In the expanding step, a preform product removed from the bobbin is expanded into a shape of the stator winding.
Claims18
A method for manufacturing a stator winding, which has a plurality of slot conductor parts accommodated in a plurality of slots of a stator core and a plurality of coil end parts connecting the slot conductor parts, the slot conductor parts being located in radial locations which are alternately displaced in an inner side and outer side manner along a circumferential direction, the method comprising:
- a winding step which forms a helical shape winding assembly by winding a conductor on a bobbin;
- an expanding step which deforms the winding assembly into a shape of the stator winding by deforming in a radial direction of the helical shape;
- and
- a forming step which forms a shape of a coil end part to the conductor and is carried out before the winding step.
A method for manufacturing a stator winding, which has a plurality of slot conductor parts accommodated in a plurality of slots of a stator core and a plurality of coil end parts connecting the slot conductor parts, the slot conductor parts being located in radial locations which are alternately displaced in an inner side and outer side manner along a circumferential direction, the method comprising:
- a winding step which forms a helical shape winding assembly by winding a conductor on a bobbin;
- and
- an expanding step which deforms the winding assembly into a shape of the stator winding by deforming in a radial direction of the helical shape, wherein
- the stator winding is a wave winding, and wherein
- the coil end part has inclined parts and a top part, and wherein
- the expanding step is an inclined parts rotating step which rotates the inclined parts on both sides about a rotation center which is an axis passing through the slot conductor part and is parallel to a line passing through the top part and being vertical to an axis of the helical shape so that one of the inclined part and the other one of the inclined part are expanded in opposite directions each other.
A method for manufacturing a stator winding, which has a plurality of slot conductor parts accommodated in a plurality of slots of a stator core and a plurality of coil end parts connecting the slot conductor parts, the slot conductor parts being located in radial locations which are alternately displaced in an inner side and outer side manner along a circumferential direction, the method comprising:
- a winding step which forms a helical shape winding assembly by winding a conductor on a bobbin;
- and
- an expanding step which deforms the winding assembly into a shape of the stator winding by deforming in a radial direction of the helical shape, and wherein
- the stator winding is a wave winding, and wherein
- the coil end part has inclined parts and a top part, and wherein
- the conductor has a rectangular shape in cross section, and wherein
- the winding step rotates the conductor itself in a twisted shape, and wherein the expanding step rotates the conductor in a reverse, direction to undo the twisted shape.
An apparatus for manufacturing a stator winding, which has a plurality of slot conductor parts accommodated in a plurality of slots of a stator core and a plurality of coil end parts connecting the slot conductor parts, the slot conductor parts being located in radial locations which are alternately displaced in an inner side and outer side manner along a circumferential direction, the apparatus being used in a winding step for forming a helical shape winding assembly by winding a conductor on a bobbin, the apparatus comprising:
- a winding device;
- a conductor supplying device;
- and a conductor twisting device, wherein
- the winding device includes the bobbin formed in a columnar shape and rotatable about an axis thereof, the bobbin having helical twisted grooves formed in a helical shape on both opposite sides thereof, and wherein
- the conductor supplying device includes a guide which supplies the conductor in one direction of the radial directions of the bobbin, a supply angle adjusting means which is capable of controlling a twisted angle of the conductor itself, and a conductor bobbin which is formed in a cylindrical shape rotatable about an axis, the conductor bobbin being supported rotatable about an axis perpendicular to the axis of the conductor bobbin, and wherein
- the conductor twisting device includes a twisting tool which has a plurality of comb teeth supported by pins in a pivotable manner and a cam mechanism engaging with the pins in a slidable manner, and wherein the plurality of comb teeth are constructed so that ends of the comb teeth swings when the comb teeth are pushed in axial directions, and wherein
- the helical twisted grooves are constructed to twist the inclined parts of the coil end part in an outwardly-open twisted manner, and wherein
- the twisting tool is constructed to twist the slot conductor part in the outwardly-open twisted manner, and wherein
- the conductor bobbin enables a twisting control on the conductor, and wherein
- the bobbin is provided to wind the conductor thereon in a folding and stacking manner to manufacture the winding assembly.
Dependencies are inferred from the claim text.