Polyphase claw pole motor and stator of the polyphase claw pole motor

Patent metadata

Field	Value
Publication number	US-10693329-B2
Application number	US-201816493175-A
Country	US
Kind code	B2
Filing date	May 10, 2018
Priority date	May 11, 2017
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A stator of a polyphase claw pole motor includes: a compressed-powder member including a compression molded product of magnetic powder; and a metal member. At least claws of the claw pole of the stator are constituted by the compressed-powder member.

First claim

What is claimed is:

1. A polyphase claw pole motor comprising a stator that includes: a compressed-powder member formed of a compression molded product of magnetic powder; and a metal member, wherein:
at least claws of a claw pole of the stator are constituted by the compressed-powder member;
a part or an entire of an annular part located on a radially outer side of the claws of the claw pole is constituted by the metal member; and
a plurality of the annular parts are disposed in an axial direction of the polyphase claw pole motor,
the polyphase claw pole motor further comprises a magnetic-path defining member to form a magnetic path in the axial direction between the plurality of annular parts, the magnetic-path defining member including an outer peripheral core disposed on a radially outer side of the annular part;
the outer peripheral core is formed of a soft-magnetic sheet;
the soft-magnetic sheet is formed of laminated sheets stacked in a circumferential direction of the polyphase claw pole motor; and
the claw pole has a flat surface on an outer peripheral surface, and the outer peripheral core has a contact surface extending in the axial direction so as to be in contact with the flat surface, the contact surface and the outer peripheral surface of the claw pole having mutually engaging shapes.

2. The polyphase claw pole motor according to claim 1 , wherein the outer peripheral core extends in the axial direction as well as in a radial direction, and the outer peripheral core has the contact surface on an inner peripheral surface in the radial direction.

Assignees

• Nsk Ltd

Inventors

• Nitta Isamu
• Araya Hiroshi
• Ukai Nobuo

Classifications

• H02K1/145 Primary

  having an annular coil, e.g. of the claw-pole type · CPC title

• H02K1/02

  characterised by the magnetic material · CPC title

• H02K1/185

  to outer stators · CPC title

• H02K3/525

  Annular coils, e.g. for cores of the claw-pole type · CPC title

• H02K21/145 Primary

  having an annular armature coil (with homopolar co-operation H02K21/20) · CPC title