Brushless dc motor and ventilation device having same mounted therein

Patent metadata

Field	Value
Publication number	US-2016197530-A1
Application number	US-201414916331-A
Country	US
Kind code	A1
Filing date	Sep 16, 2014
Priority date	Sep 17, 2013
Publication date	Jul 7, 2016
Grant date	—

Abstract

Insulator that forms an insulating layer on a surface of a plurality of stacked stator cores includes protruding part extending from an outer circumference of stator cores on a substantially same face as one end face of stator cores in a stacking direction. Protruding part includes hooks that fixedly holds connector having a plurality of connector terminals for feeding power from outside. Connector is fixedly held by hooks, winding is wound around each slot of stator cores via insulator, and connector terminals are fixedly press-fitted to connector. A tip of each of connector terminals on a side of winding is bent into a substantially L-shape, winding end in each phase of winding is directly tied to L-shaped tip of connector terminal and connected thereto by soldering.

First claim

What is claimed is:

1 . A brushless DC motor comprising:
a plurality of stacked stator cores; an insulator configured to form an insulating layer on a surface of the stator cores and to have a protruding part extending from an outer circumference of the stator cores on a same face as one end face of the stator cores in a stacking direction; a winding wound around the stator cores via the insulator; and a connector configured to have a plurality of connector terminals that feed power from outside, and to be fixedly held by the protruding part, wherein ends of the winding are connected to the plurality of connector terminals.

2 . The brushless DC motor according to claim 1 , wherein
the protruding part of the insulator has a plurality of connector-neighboring holes, terminal pins are vertically received in the respective connector-neighboring holes, the ends of the windings are brought into contact with the terminal pins and tied to the terminal pins, and the terminal pins are connected to the respective connector terminals.

3 . The brushless DC motor according to claim 1 , wherein the protruding part of the insulator is provided with a connector holder configured to fixedly hold the connector.

4 . The brushless DC motor according to claim 1 , wherein at least one of the plurality of connector terminals is bent into an L-shape.

5 . The brushless DC motor according to claim 4 , wherein only the connector terminal tied to one of the ends of the winding out of the plurality of connector terminals is bent into the L-shape, and other connector terminals are straight.

6 . The brushless DC motor according to claim 1 , further comprising:
a board holder configured to protrude in a stacking direction of the stator cores to hold a driving circuit board, wherein the insulator includes two of the protruding part, and the first protruding part has a connector holder with a connector-neighboring hole, the second protruding part has an outer peripheral hole configured to vertically receive the terminal pin, the driving circuit board is held by the board holder, and the winding is connected to the terminal pin, the terminal pin is connected to the driving circuit board, and the driving circuit board is connected to the connector.

7 . A ventilation device mounted with the brushless DC motor according to claim 1 configured to drive a ventilation fan.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Fujii Kenji
• Matsumoto Toshihiro
• Murao Satoru

Classifications

• F04D25/0693

  Details or arrangements of the wiring · CPC title

• F04D25/088

  Ceiling fans · CPC title

• H02K11/0094

  Structural association with other electrical or electronic devices · CPC title

• H02K3/50 Primary

  Fastening of winding heads, equalising connectors, or connections thereto · CPC title

• H02K5/225 Primary

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title