US 2017/0288480 A1Published application

Rotating electric machine

AssigneeMitsubishi Electric Corporation

InventorsTadashi MURAKAMI, Naomi KIKUCHI, Atsushi SAKAUE, Tatsuro HINO, Akihiro YAMAMURA, Shogo OKAMOTO, Shinji NISHIMURA, Masaya INOUE

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Abstract

While lamination of steel sheets to be included in a stator core having a plurality of tooth portions is performed through swaging at yoke portions and through swaging at tooth portions, the stator core is formed in such a way as to include the tooth portion having a portion that is pressed into another steel sheet through swaging and the tooth portion having no portion that is pressed into another steel sheet through swaging.

Claims9

Dependent claims

A rotating electric machine having a rotor pivotably provided and a stator disposed at the outer circumference side of the rotor,

wherein the stator has an annular stator core and a coil portion wound around the stator core,
wherein the stator core includes two or more divided cores arranged in an annular manner,
wherein the divided core has a laminated structure in which steel sheets that each have a yoke portion formed in the circumferential direction and two tooth portions formed in such a way as to protrude from the yoke portion toward the radial-direction inner side are united with one another by respective first swaging portions provided in the yoke portions and respective second swaging portions provided in the tooth portions, and
wherein the divided core has at least one portion where steel sheets that are adjacent to each other in the thickness direction are not united by the second swaging portion at one of or both of the two tooth portions.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 15/507,992Filed 15 Jan 2015
Published: 5 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H02K 1/185
Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures: to outer stators
H02K 1/148
Consisting of a generally annular yoke with salient poles: sectional cores
H02K 1/276
The rotor consisting of magnets or groups of magnets arranged with alternating polarity: magnets embedded in the magnetic core, e.g. interior…
H02K 5/1732
Using bearings with rolling contact, e.g. ball bearings: radially supporting the rotary shaft at both ends of the rotor

Family

US 10,491,059 B2Related patent
US 2017/0288480 A1This patent

From the US filing history. Foreign family members aren’t listed.

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