US 8,427,024 B2Granted

Stator

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsAtsushi Watanabe, Fujio Ando, Masayoshi Haga, Manabu Kitamura

Life of this patent

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Abstract

To provide a stator capable of achieving downsizing and high output power and a stator manufacturing method, a stator comprises a split stator core and slots formed between the teeth, and protrusion-formed coils each being made of a flat rectangular conductor and placed in the slots. Each protrusion-formed coil has a shape including, in a coil end portion, a lead-side protrusion or a non-lead-side protrusion formed to protrude upward in an axial direction of the stator core from a first oblique side portion, a second oblique side portion, a third oblique side portion, and a fourth oblique side portion, and a first oblique side portion, a second oblique side portion, a third oblique side portion, and a fourth oblique side portion. The lead-side protrusion or the non-lead-side protrusion is designed with a height to avoid interference between the protrusion-formed coils placed in the stator core.

Claims4

Dependent claims

A stator comprising:

a stator core including teeth and slots formed between the teeth;
and coils each being made of a flat rectangular conductor and placed in the slots, wherein
each coil has a shape including, in a coil end portion, oblique side portions and a protrusion formed to protrude upward in an axial direction of the stator core from the oblique side portions,
the protrusion has a height to avoid interference between the coils placed in the stator core, and
the coil end portion of each coil is formed with a lane-change portion,
a coil interference-point distance between a first interference point at which a first coil and a second coil arranged adjacently interfere with each other and a second interference point at which the second coil and a third coil arranged adjacently interfere with each other is determined to be equal to or shorter than a bending center-to-center distance defined as a distance in a circumferential direction of the stator core between a bending center on an inner circumferential side of the lane-change portion located on the inner circumferential side of the stator core and a bending center on an outer circumferential side of the lane-change portion located on the outer circumferential side of the stator core.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/131,828Filed 18 Dec 2009
Published: US 2012/0025658 A12 Feb 2012
Granted: 23 Apr 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H02K 15/0431
Winding flat conductive wires or sheets: concentrated windings
H02K 3/12
Windings characterised by the conductor shape, form or construction, e.g. with bar conductors: arranged in slots
H02K 15/35
Connecting winding sections; Forming leads; Connecting leads to terminals: form-wound windings
H02K 2213/03
Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00: machines characterised by numerical values,…