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Electric-motor-having-a-stator-with-an-end-core-part-having-a-different-shape-than-a-central-core-part

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Electric motor having a stator with an end core part having a different shape than a central core part

Details

Inventors: Sakai, Toshihiko; Taneda, Yukinori; Hiramatsu, Hiromichi; Yamamoto, Noriaki; Enomoto, Yuji; Ishigami, Takashi; Ito, Motoya; Tajima, Fumio; Senoh, Masaharu; Shibukawa, Suetaro;
Assignee: Hitachi, Ltd. (Tokyo, JP)
Primary Examiner: Enad; Elvin
Assistant Examiner:
Attorney, Agent or Firm: Mattingly, Stanger & Malur

An electric motor, wherein a space factor of a coil in a stator or a rotor is enhanced, and which has a central part core comprising a plurality of laminated electromagnetic steel plates stamped out into a predetermined slot sectional shape and an end part core which is disposed on at least one end part toward a laminating direction of the central part core and a core shape of the end part core is different from the core shape of the central part core.

DETAILED DESCRIPTION It is the object of the present invention to provide a low-priced electric motor wherein a coil end part as described above is utilized effectively and the coil is easy to assemble due to the enhanced space factor.
The electric motor regarding the present invention is characterized in that a central part core comprising a plurality of laminated electromagnetic steel plates stamped out into a predetermined slot sectional shape and an end part core comprising a plurality of laminated electromagnetic steel plates on at least one end in the laminating direction of said central part core are different from each other in a core shape.
Consequently, the end part core of the present invention can be constituted from combination of a plurality of divided cores wherein the teeth and the yoke can be divided or a clearance shape size of the coil formed outside larger than the central part core side is disposed.

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