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Stator, motor and compressor

  • US 9,991,756 B2
  • Filed: 11/24/2015
  • Issued: 06/05/2018
  • Est. Priority Date: 12/10/2014
  • Status: Active Grant
First Claim
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1. A stator comprising:

  • a stator core having a plurality of tooth portions arrayed circumferentially with intervals therebetween;

    an insulator fitted to each of axial end faces of the stator core;

    a coil wound on the tooth portions of the stator core, the insulator being interposed between the stator core and the coil;

    a slot insulator placed within each of slot portions that are spaces between circumferentially neighboring ones of the tooth portions, the slot insulator being interposed between the stator core and the coil; and

    an inter-coil insulator including a first inter-coil insertion portion and a second inter-coil insertion portion placed between circumferentially mutually neighboring windings of the coil, and a folding-bottom portion connecting the first inter-coil insertion portion and the second inter-coil insertion portion with the first inter-coil insertion portion extending from a first end of the folding-bottom portion and the second inter-coil insertion portion extending from a second end of the folding-bottom portion,the inter-coil insulator being sheet shaped and folded over a width equal to double a sheet thickness at the folding-bottom portion extending along an axial direction,the folding-bottom portion being positioned on a distal end side of the tooth portions; and

    movement of the folding-bottom portion in a radial direction toward the rotor is restricted byextending portions of the stator core extending on a distal end side of the tooth portions orextending portions of the slot insulator extending on the distal end side of the tooth portions.

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