Molded motor with insulation inner wall and air conditioner

Patent metadata

Field	Value
Publication number	US-9705375-B2
Application number	US-201314433405-A
Country	US
Kind code	B2
Filing date	Sep 2, 2013
Priority date	Oct 15, 2012
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A molded motor made by molding, with a thermosetting resin, a stator, which includes: a stator core formed by stacking magnetic steel plates; an insulation portion applied to the stator core; a winding applied to the insulation portion; and a power supply terminal. On an insulation inner wall provided on an inner diameter side of the insulation portion, a plurality of inner wall protrusions formed at axial ends of the insulation inner wall on a counter wire-connection side of the stator core and abutting on a die, used when the stator is molded, are provided in a circumferential direction of the stator core.

First claim

The invention claimed is:

1. A molded motor, comprising:
a stator core that includes an opening of the stator core formed with
a bracket installation surface, and
an inner-wall protrusion installation surface positioned closer to a stator core side than the bracket installation surface and having a diameter smaller than a bracket-fitting inner periphery and larger than an inner diameter of the stator core; and

an insulation portion applied to the stator core, wherein
on an insulation inner wall provided on an inner diameter side of the insulation portion of the stator core, a plurality of inner wall protrusions, formed at axial ends of the insulation inner wall on a counter wire-connection side of the stator core and abutting on a die, are provided in a circumferential direction of the stator core, and
each of the plurality of inner wall protrusions is located on an axial end face of the inner-wall protrusion installation surface.

2. The molded motor according to claim 1 , wherein
an axial end of each of the plurality of inner wall protrusions extends toward an opening of the stator core equal to or less than a tip portion of an axial end of an insulation outer wall of the stator core.

3. A molded motor, comprising:
a stator core that includes an opening of the stator core formed with
a bracket installation surface, and
concave portions being formed in plural in a circumferential direction, extending from the bracket installation surface toward a stator core side, and extending from the inner periphery of the stator core to radially outside; and

an insulation portion applied to the stator core, wherein
on an insulation inner wall provided on an inner diameter side of the insulation portion of the stator core, a plurality of inner wall protrusions, formed at axial ends of the insulation inner wall on a counter wire-connection side of the stator core and abutting on a die, are provided in a circumferential direction of the stator core, and
each of the plurality of inner wall protrusions are located on a bottom surface, the bottom surface being perpendicular to the axial direction, of each of the concave portions, respectively.

4. The molded motor according to claim 1 , wherein
an opening of the stator core is formed with
a bracket installation surface, and
holes
formed in plural in the circumferential direction,
positioned radially more outside of a diameter than an inner periphery of the stator core, and
extending from the bracket installation surface toward the stator core side, and

each of the plurality of inner wall protrusions are located on a bottom surface, the bottom surface being perpendicular to the axial direction, of each of holes, respectively.

5. An air conditioner comprising an air blower, wherein
the molded motor according to claim 1 is incorporated in the air blower.

6. An air conditioner comprising an air blower, wherein
the molded motor according to claim 3 is incorporated in the air blower.

Assignees

• Mitsubishi Electric Corp

Inventors

• Yamamoto Mineo
• Kawakubo Mamoru
• Ishii Hiroyuki
• Aso Hiroki
• Oya Junichiro
• Urabe Yuto

Classifications

• H02K2211/03

  Machines characterised by circuit boards, e.g. pcb · CPC title

• F04D13/06

  the pump being electrically driven · CPC title

• H02K29/08 Primary

  using magnetic effect devices, e.g. Hall-plates, magneto-resistors (H02K29/12 takes precedence) · CPC title

• H02K5/02 Primary

  Casings or enclosures characterised by the material thereof · CPC title

• H02K2203/03

  Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations · CPC title